SEITEL INC
10-K, 1999-03-31
OIL & GAS FIELD EXPLORATION SERVICES
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                                    FORM 10-K
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

- -------
|  X  |   ANNUAL  REPORT  PURSUANT  TO  SECTION  13 OR 15(d)  OF THE  SECURITIES
- -------   EXCHANGE ACT OF 1934
          For Fiscal Year Ended December 31, 1998
                          -----------------------
                  OR

- -------
|     |   TRANSITION  REPORT  PURSUANT TO SECTION 13 OR 15(d) OF THE  SECURITIES
- -------   EXCHANGE ACT OF 1934

          [No Fee Required] For the transition period          to        .
                                                      --------    -------

          Commission File Number 0-14488
                                 -------

                                  SEITEL, INC.
               (Exact name of registrant as specified in charter)

           Delaware                                             76-0025431
           --------                                             ----------
(State or other jurisdiction of                                (IRS Employer
incorporation or organization)                            Identification Number)

     50 Briar Hollow Lane
   West Building, 7th Floor
        Houston, Texas                                             77027
        --------------                                             -----
     (Address of principal                                      (Zip Code)
      executive offices)

                                 (713) 881-8900
                                 --------------
              (Registrant's telephone number, including area code)

                                 Not Applicable
                                 --------------
               Former     name,  former  address  and  former  fiscal  year,  if
                          changed since last report.

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                            ----                  ----
                   Yes       X            No
                            ----                  ----

Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. X
          ---

The  aggregate  market value of the voting stock held by  non-affiliates  of the
registrant at March 29, 1999 was approximately $321,985,638. For these purposes,
the term "affiliate" is deemed to mean officers and directors of the registrant.
On such  date,  the  closing  price of the  Common  Stock on the New York  Stock
Exchange was $14.625 and there were a total of 23,810,852 shares of Common Stock
outstanding.

     Documents Incorporated by Reference:

     Document                                              Part
     ------------------------------------                --------
     Definitive Proxy Statement for                        III
     1999 Annual Stockholders Meeting

<PAGE>

ITEM 1.  BUSINESS
         --------

General
- -------

     Seitel,  Inc.  (the  "Company")  is a leading  diversified  energy  company
providing  seismic data and related  geophysical  technology used in oil and gas
exploration    and    production.    The   Company    sells   its    proprietary
information-technology  to oil and gas  companies  and has developed an evolving
crude oil and natural gas exploration and production company.  See Note O to the
Company's  Consolidated  Financial Statements for financial information relating
to industry segments.

Seismic Operations
- ------------------

     Since  its  inception  in  1982,  the  Company  has  been  engaged  in  the
development  of a  proprietary  library  of  seismic  data,  created by both the
Company and others.  The Company's  seismic data library is primarily  owned and
marketed by Seitel Data, Ltd., a Texas limited partnership of which wholly-owned
Seitel  subsidiaries  constitute  all of the limited and general  partners,  and
Olympic Seismic,  Ltd., a wholly-owned  Canadian  subsidiary.  The data library,
which consists of both two-dimensional ("2D") and three-dimensional ("3D") data,
is  marketed  to major  and  independent  oil and gas  companies  under  license
agreements.   Seismic   surveys  and  the  analysis  of  seismic  data  for  the
identification and definition of underground geological structures are principal
techniques  used in oil and gas  exploration  and  development  to determine the
existence and location of subsurface hydrocarbons.

     At December 31, 1998, the Company owned approximately  920,000 linear miles
of 2D and  approximately  11,750  square  miles  of 3D  seismic  data  which  it
maintained in its library and marketed an additional  270,000 linear miles of 2D
data.  Subsequent to December 31, 1998 the Company  acquired the entire database
of Amoco Canada  consisting of 235,000 linear miles of 2D and 2,790 square miles
of 3D seismic  data.  The  Company's  seismic data library now  constitutes  the
largest  seismic data base  marketed  publicly in North  America based solely on
management's  knowledge and beliefs  regarding the industry.  The Company's U.S.
seismic  surveys  extend to  virtually  every  major  domestic  exploration  and
development  region,  with the majority of the seismic surveys  covering onshore
and  offshore the U.S.  Gulf Coast.  In addition,  the  Company's  international
seismic surveys are  concentrated  in Western Canada and the  Continental  Shelf
offshore the United Kingdom and Ireland.

     The Company's  marketing team of 20 seismic sales specialists  markets data
from its  library  and from  newly  initiated  seismic  surveys.  The  Company's
marketing  philosophy is that seismic data,  like most other  products,  must be
sold  aggressively as opposed to waiting passively for customer  purchases.  The
marketing team monitors energy industry  exploration and development  activities
through  close  interaction  with  oil and gas  companies  on a daily  basis  to
maximize seismic sales opportunities.

     The Company has a 12 member staff of geotechnical  professionals  dedicated
to its  seismic  operations,  who have in  excess  of 225  years  of  collective
geophysical   experience.   Together,   the  marketing  team  and   geotechnical
professionals  help clients  evaluate  their  respective  seismic  requirements,
design  seismic  data  programs  to  meet  market  demand,   and  supervise  the
reprocessing of data in the Company's library to enhance future resales.

     Three-dimensional  seismic data provides a graphic geophysical depiction of
the  earth's  subsurface  from  two  horizontal   dimensions  and  one  vertical
dimension,  rendering a more  detailed  picture than 2D data,  which  presents a
cross-sectional  view from one vertical and one horizontal  dimension.  The more
comprehensive  geophysical  information  provided  by 3D  surveys  significantly
enhances an  interpreter's  ability to evaluate the probability of the existence
and  location  of  subsurface  hydrocarbons.  The proper  use of 3D surveys  can
significantly  increase  drilling  success  rates and reduce the  occurrence  of
costly   dry   holes,   uneconomic   wells   and   non-commercial   wells   and,
correspondingly,  significantly lower exploration and development finding costs.
However,  the cost to create 3D seismic data is significantly more than the cost
to create 2D seismic data,  particularly for onshore data. As a result,  2D data
remains  economically  more efficient for preliminary,  broad-scale  exploration
evaluation  and to determine the location for 3D surveys.  Also, the best way to
design a 3D survey is from 2D data grids of the respective  area. The 3D surveys
can then be used for more  site-specific  analysis to maximize  actual  drilling
potential.
<PAGE>

     The Company creates data using "group shoot" programs. Prior to undertaking
a seismic  survey,  the  Company  pre-contracts  a  majority  of the cost of the
project by arranging  multi-client  participation  or "group shoots." In a group
shoot  program,  several oil and gas companies  share in the expense of a survey
and thereby  materially  reduce their  respective cost of the survey,  while the
Company  reduces its initial  capital  requirements  associated with the seismic
survey.  In a  group-shoot  survey,  the Company  retains  ownership of the data
created  and  markets   licenses  to  use  the  data  both  to  the  group-shoot
participants  and  subsequently to others who make selections  after the data is
added to the  Company's  library.  (Seismic  data  cannot  be  transferred  by a
licensee to another  party;  each  individual  user must  purchase a  respective
license.) The Company contracts with selected seismic acquisition crew companies
to conduct both onshore and offshore seismic surveys.

     The Company has developed  fully-integrated  3D technology and  operations,
which extend from its expansive 2D seismic library from which to best design the
parameters for 3D surveys,  its large and growing 3D data library,  a processing
center and proprietary  computer  technology coupled with extensive  geophysical
application expertise to effectively interpret 3D data.

Oil and Gas Exploration and Production Operations
- -------------------------------------------------

     In addition to licensing  its seismic data to  customers,  the Company also
utilizes  its  seismic  expertise  to  participate   directly  in  oil  and  gas
exploration,   development  and  ownership  of  hydrocarbon   reserves   through
partnering  relationships with oil and gas companies.  The Company's strategy is
to combine its 3D and 2D seismic expertise and related geophysical  technologies
with the land  position  and  geology,  engineering  and  drilling  expertise of
selected  petroleum  producers in  exploration  and  development  programs.  The
Company  believes that this  combination  will result in higher drilling success
rates,  thereby  allowing the Company to participate in oil and gas  exploration
and  development on a relatively low cost/low risk basis,  and to build an asset
base of oil and gas reserves which complement its seismic data library.

     Since its formation in 1993,  the Company's  wholly-owned  exploration  and
production  subsidiary,  DDD Energy,  Inc. ("DDD Energy"),  has entered into and
maintained cost and  revenue-sharing  relationships with more than 100 petroleum
companies  and,  in doing  so,  has  received  the  benefit  of these  petroleum
companies' land,  geological,  engineering and drilling  staffs.  DDD Energy has
conducted over 1,900 square miles of advanced 3D surveys,  located  primarily in
the Gulf Coast areas of onshore Texas,  Louisiana,  Alabama and Mississippi,  as
well as California and Arkansas. DDD Energy's working interest in these projects
ranges  from  approximately  10% to 90%,  with an average  working  interest  of
approximately  31%. More than 200 square miles of 3D surveys are scheduled to be
conducted  in 1999 by DDD  Energy and its  partners.  The  majority  of the well
locations  pinpointed  by the  surveys  that have  already  been  completed  and
interpreted   should  be  drilled  during  the  next  three  years.  DDD  Energy
exclusively utilizes the Company's processing and interpretation  technology and
operations  to provide  optimum  quality  control  and  confidentiality  for the
exploration and production programs in which DDD Energy participates.

     Since inception,  DDD Energy has participated in the drilling of 281 wells,
191 of which were commercially productive for a 68% success rate.

Customers
- ---------

     The Company  markets its seismic data to major and  independent oil and gas
companies.  No one  customer  accounted  for  as  much  as 10% of the  Company's
revenues during the years 1998, 1997 or 1996. As a result,  the Company does not
believe that the loss of any customer  would have a material  adverse  impact on
its seismic business.  The Company believes the size of its customer base is due
to its  seismic  technology  and  capabilities  and the  increasing  size of its
data-library base.
<PAGE>

Competition
- -----------

     The  creation  and resale of seismic  data are  highly  competitive  in the
United  States.  There are a number of  independent  oil-service  companies that
create and market  seismic  data,  and  numerous  oil and gas  companies  create
seismic data and maintain  their own seismic data banks.  Some of the  Company's
competitors have longer operating  histories,  greater  financial  resources and
larger  sales  volumes  than the  Company.  However,  the number of  independent
seismic  companies  has  decreased  significantly  during the last decade due to
difficult industry conditions. In 1985, there were approximately 150 independent
seismic companies operating in the United States, of which approximately 15 were
significant competitors.  In 1998, there were approximately 100 companies,  with
approximately 10 significant competitors.  With the U.S. "oil patch" collapse in
1985, many of the independent seismic companies went out of business; during the
1990's, this industry has witnessed a major consolidation. At the same time, oil
and gas  companies  have  reduced  their  internal  geophysical  staffs and have
out-sourced  more for services such as seismic data. The Company believes it can
compete  favorably  because of the  expansiveness of its data-library  base, the
expertise of its marketing  staff and the technical  proficiency and exploration
experience of its  geotechnical  staff.  These  resources  enable the Company to
provide high-quality service and to create and market high-grade data.

     In the oil and gas exploration  and production  business there are numerous
oil and gas companies competing for the acquisition of mineral  properties.  The
Company  believes it can  participate  effectively  in the  exploration  for and
development   of   natural   gas  and  crude  oil   reserves   because   of  its
fully-integrated  seismic resources and corollary geophysical expertise combined
with  the  geological  and  engineering  experience  and land  positions  of the
Company's oil and gas company partners.

Seasonality and Timing Factors
- ------------------------------

     The Company's  results of operations can fluctuate from quarter to quarter.
The fluctuations are caused by a number of factors.

     With respect to the  Company's  seismic  licensing  revenue,  the Company's
results are influenced by oil and gas industry capital  expenditure  budgets and
spending  patterns.  These budgets are not necessarily  spent in either equal or
progressive  increments  during the year,  with  spending  patterns  affected by
individual oil and gas company requirements as well as industry-wide conditions.
As a result, the Company's seismic data revenue does not necessarily flow evenly
or progressively  on a sequential  quarterly basis during the year. In addition,
certain  weather-related  events may delay the  creation of seismic data for the
Company's  library  during  any given  quarter.  Although  the  majority  of the
Company's  seismic  resales are under  $500,000 per sale,  occasionally a single
data  resale from the  Company's  library can be as large as $5 million or more.
Such large  resales  can  materially  impact the  Company's  results  during the
quarter in which they occur,  creating an  impression  of a trend of  increasing
revenue that may not be achieved in subsequent periods.

     With respect to revenue from the Company's oil and gas operations, bringing
a  small  number  of  high-production  wells  on line  in a  given  quarter  can
materially  impact the results of such quarter  since many of the wells in which
the Company participates  experience high initial flow rates for the first 60 to
90 days of  production  and  then  taper  off to a  lower,  steady  rate for the
remainder  of their  lives.  If several  of such wells are  brought on line in a
quarter,  the results for such quarter will appear  unusually  strong,  and then
later,  when production  decreases to its long-term,  steady rate, the Company's
results may not be able to sustain the trend of increased  performance indicated
by the  strong  results  of the  previous  quarter.  The  Company's  oil and gas
exploration   and  production   operations  also  can  be  impacted  by  certain
weather-related  events  as well as by  mechanical  and  equipment  problems  or
shortages  and  other  factors,  which may  delay  the  hookup  of  successfully
completed  wells and delay the resultant  production  revenue.  Also, due to the
high  percentage  of gas reserves in the  Company's  portfolio  and the seasonal
variations in gas prices,  the Company's results from its oil and gas operations
also are subject to  significant  fluctuations  due to  variations  in commodity
prices. In addition, some producing wells may be required periodically to go off
line for pipeline and other maintenance. The Company does not believe that these
fluctuations  in quarterly  results are  indicative of the  Company's  long-term
prospects and financial performance.

     See  Note  P  to  the  Company's   Consolidated  Financial  Statements  and
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations.



<PAGE>


Employees
- ---------

     As of December 31, 1998, the Company and its subsidiaries had 110 full-time
employees  and three  employees who devote part of their time to the Company who
are also officers of other  corporations.  None of the  Company's  employees are
covered by collective bargaining agreements.  Of these employees, 72 are related
to the seismic operations and 21 are related to the oil and gas operations.  The
balance provides accounting and administrative  support for all operations.  The
Company believes it has a favorable relationship with its employees. The Company
has employment contracts with five of its senior corporate executives.

Risk Factors
- ------------

     ANY INVESTMENT IN OUR SECURITIES INVOLVES RISK.  INVESTORS SHOULD CAREFULLY
CONSIDER,  IN ADDITION TO THE OTHER  INFORMATION  CONTAINED IN THIS REPORT,  THE
RISKS DESCRIBED BELOW BEFORE MAKING ANY INVESTMENT DECISION.

     Decreases in Energy Industry Spending Could Adversely Affect Our Business.
     -------------------------------------------------------------------------

     Demand for our seismic data depends primarily upon the level of spending by
oil and gas companies for  exploration,  production and development  activities.
These spending  levels may increase and decrease with increases and decreases in
the commodity prices for oil and gas, so that demand for our seismic data may be
affected  to some degree by market  prices for natural gas and crude oil,  which
have historically been very volatile.  As a result of recent weakness in oil and
gas  commodity  prices,  the level of overall oil and gas industry  activity has
declined from levels  experienced  in recent years.  If our  customers'  capital
spending  decreases in line with overall recent industry trends, it could have a
significant  adverse  effect upon the demand for our services and our results of
operations and cash flow.  Revenues generated by our oil and gas exploration and
development  business  increase and decrease with increases and decreases in the
market prices of oil and gas.  Also,  factors  beyond our control may affect our
oil and gas operations. These factors include the level of supply of natural gas
and oil, the  availability  of adequate  pipeline and other  transportation  and
processing facilities and the marketing of competitive fuels.

     Drilling Hazards and Dry Holes Could Affect Our Oil and Gas Activities.
     ----------------------------------------------------------------------

     Our oil and gas operations are subject to hazards  incident to the drilling
of oil and gas wells,  such as cratering,  explosions,  uncontrollable  flows of
oil, gas or well fluids, fires, pollution, or other environmental risks, as well
as to the risk that we may not encounter any commercially productive natural gas
or oil  reserves.  Some of these hazards can cause  personal  injury and loss of
life, severe damage to and destruction of property and equipment,  environmental
damage  and  suspension  of  operations.  We seek to  reduce  dry hole  risks by
utilizing 3D seismic  data,  where  appropriate,  to help us determine  where to
drill.  However,  since we do not act as  operator  in our oil and gas  drilling
business,  we are  dependent  upon our  petroleum  company  partners  to conduct
operations in a manner so as to minimize these  operating  risks.  In accordance
with industry  practice,  we maintain  insurance  against some,  but not all, of
these  operating  risks.  We  cannot  be sure that  adequate  insurance  will be
available in the future, or that we will be able to maintain adequate  insurance
on terms and conditions we find acceptable. As a result of the risks inherent in
oil and gas operations, the success of our oil and gas exploration,  development
and production activities is uncertain.

     Loss of Key Personnel Could Adversely Affect Our Business.
     ---------------------------------------------------------

     Our operations  are dependent  upon a relatively  small group of management
and technical personnel. The loss of one or more of these individuals could have
a material adverse effect on us. We use equity ownership and other incentives to
attract and retain our employees.  In addition,  we have  employment  agreements
with our President and Chief Executive  Officer,  Paul A. Frame,  Executive Vice
President and Chief  Operating  Officer,  Horace A. Calvert,  and Executive Vice
President of Finance and Chief Financial Officer, Debra D. Valice.
<PAGE>

     Regional Events May Affect Our Geographically Concentrated Operations.
     ---------------------------------------------------------------------

     Most of the seismic  data in our seismic data  library,  as well as most of
our existing  interests in oil and gas  properties,  are located along the coast
and  offshore in the U.S.  Gulf of Mexico.  Because of this  concentration,  any
regional  events that  increase  costs,  reduce  availability  of  equipment  or
supplies,  reduce demand or limit  production will impact us more adversely than
if we were more geographically diversified.

     Extensive  Governmental  Regulation  of  Our  Business  Affects  Our  Daily
     ---------------------------------------------------------------------------
     Operations.
     ----------

     The oil and gas  industry in general is subject to  extensive  governmental
regulation,  which may be changed  from time to time in  response to economic or
political conditions. In particular,  our oil and gas exploration and production
is subject to federal and state regulations governing  environmental quality and
pollution  control,  state limits on allowable  rates of  production  by well or
proration  unit, and other similar  regulations.  State and federal  regulations
generally are intended to prevent waste of natural gas and oil,  protect  rights
to produce natural gas and oil between owners in a common reservoir, control the
amount  of  natural  gas  and oil  produced  by  assigning  allowable  rates  of
production  and  control   contamination  of  the   environment.   Environmental
regulations  affect our  operations on a daily basis.  Also, we believe that the
trend toward more expansive and stricter environmental laws and regulations will
continue.  The  implementation of new, or the modification of existing,  laws or
regulations  affecting  the oil and gas industry  could have a material  adverse
impact on us.
<PAGE>

Other
- -----

     The Company is not  dependent on any  particular  raw  materials,  patents,
trademarks or copyrights for its business operations.

     The following  organization chart gives an overview of the structure of the
Company:
<TABLE>
<CAPTION>

  <S>                       <C>                       <C>      <C>                              <C>
                           ---------------------------
                      +----| Seitel Delaware, Inc.   | 1%
                      |    | 100%                    |----+    ----------------------------
                      |    ---------------------------    |    |Seitel Data, Ltd.         |
                      |                                   |----|                          |
                      |    --------------------------- 99%|    ----------------------------
                      |----| Seitel Data Corp.       |----+
                      |    | 100%                    |----+    ----------------------------
                      |    ---------------------------    |    |Seitel Offshore Corp.     |
                      |                                   |----|100%                      |
                      |    ---------------------------    |    ----------------------------
                      |----| DDD Energy, Inc.        |    |
                      |    | 100%                    |    |    ----------------------------
- ------------------    |    ---------------------------    |    |Seitel International, Inc.|
++++++++++++++++++    |                                   |----|100%                      |
+                +    |    ---------------------------    |    ----------------------------
+  SEITEL, INC.  +----+----| Matrix Geophysical, Inc.|    |
+                +    |    | 100%                    |    |    ----------------------------
++++++++++++++++++    |    ---------------------------    |    |Datatel, Inc.             |
- ------------------    |                                   +----|100%                      |
                      |    ---------------------------         ----------------------------
                      |----| Seitel Canada Holdings, |
                      |    | Inc.                    |         ----------------------------
                      |    | 100%                    |---------|Olympic Seismic Ltd.      |
                      |    ---------------------------         |100%                      |
                      |                                        ----------------------------
                      |    ---------------------------
                      |----| Seitel Management, Inc. |
                      |    | 100%                    |
                      |    ---------------------------
                      |
                      |    ---------------------------         ----------------------------
                      |----| Seitel Geophysical, Inc.|----+----|African Geophysical, Inc. |
                      |    | 100%                    |    |    |100%                *<F1> |
                      |    ---------------------------    |    ----------------------------
                      |                                   |
                      |    ---------------------------    |    ----------------------------    --------------------------
                      |----| Alternative Communica-  |    +----|EHI Holdings, Inc.        |----| Eagle Geophysical, Inc.|
                      |    | tions Enterprises, Inc. |         |100%                      |    | 17.3%                  |
                      |    | 100%                    |         ----------------------------    --------------------------
                      |    |                   *<F1> |
                      |    ---------------------------
                      |
                      |    ---------------------------
                      |----| Exsol, Inc.             |
                      |    | 100%                    |
                      |    |                   *<F1> |
                      |    ---------------------------
                      |
                      |    ---------------------------
                      |----| Geo-Bank, Inc.          |
                      |    | 100%                    |
                      |    |                   *<F1> |
                      |    ---------------------------
                      |
                      |    ---------------------------         ----------------------------
                      |----| Seitel Gas & Energy     |---------|Seitel Natural Gas, Inc.  |
                      |    | Corp.                   |         |100%                *<F1> |
                      |    | 100%              *<F1> |         ----------------------------
                      |    ---------------------------
                      |
                      |    ---------------------------
                      +----| Seitel Power Corp.      |
                           | 100%                    |
                           |                   *<F1> |
                           ---------------------------

<FN>
<F1> * Dormant
</FN>
</TABLE>

<PAGE>


ITEM 2.  PROPERTIES
         ----------

     The Company,  through its wholly-owned subsidiary DDD Energy,  participates
in oil and  gas  exploration  and  development  efforts.  For  estimates  of the
Company's  net proved and proved  developed  oil and gas reserves as of December
31, 1998, see Note Q to the Company's Consolidated  Financial Statements.  There
are numerous  uncertainties inherent in estimating quantities of proved reserves
and  in  projecting  future  rates  of  production  and  timing  of  development
expenditures,  including  many factors  beyond the control of the producer.  The
reserve  data  set  forth  in  Note Q to the  Company's  Consolidated  Financial
statements represent only estimates. Reserve engineering is a subjective process
of estimating  underground  accumulations of natural gas and liquids,  including
crude oil,  condensate  and natural gas  liquids,  that cannot be measured in an
exact manner.  The accuracy of any reserve  estimate is a function of the amount
and quality of available data and of engineering  and geological  interpretation
and judgment.  As a result,  estimates of different  engineers normally vary. In
addition,  results of drilling, testing and production subsequent to the date of
an  estimate  may  justify  revision  of  such  estimate.  Accordingly,  reserve
estimates are often  different from the  quantities  ultimately  recovered.  The
meaningfulness  of such  estimates is highly  dependent upon the accuracy of the
assumptions upon which they were based.

     In general,  the volume of production from oil and gas properties  owned by
the Company  declines as reserves  are  depleted.  Except to the extent that the
Company acquires  additional  properties  containing proved reserves or conducts
successful exploration and development activities,  or both, the proved reserves
of the Company will decline as reserves are  produced.  Volumes  generated  from
future  activities of the Company are therefore  highly dependent upon the level
of success in finding or acquiring additional reserves and the costs incurred in
so doing.

     The following  table sets forth the number of productive  oil and gas wells
(including producing wells and wells capable of production) in which the Company
owned an interest as of December  31, 1998.  Gross oil and gas wells  include 10
with  multiple  completions.  All of the wells are operated by the Company's oil
and gas company  partners.  A "gross" well is a well in which the Company owns a
working  interest.  "Net"  wells  refer  to the  sum of the  fractional  working
interests owned by the Company in gross wells.

                          Gross Wells       Net Wells
                          -----------       ---------
     Oil                       52              12.35
     Gas                      114              32.05

     The following  table sets forth the number of net wells drilled in the last
three fiscal years in which the Company participated.
<TABLE>
<CAPTION>
                              Exploratory                           Development
                      --------------------------------      --------------------------------
                       Productive        Dry    Total        Productive     Dry       Total
                       ----------        ---    -----        ----------     ---       -----
<S>                         <C>         <C>      <C>             <C>        <C>        <C>
1998
- ----
Texas                        .57        1.68     2.25            1.10         -        1.10
Mississippi                 1.00        1.00     2.00               -         -           -
Louisiana                   1.50        1.75     3.25             .66       .33         .99
California                   .15         .15      .30               -         -           -
Arkansas                       -         .13      .13               -         -           -
Michigan                       -         .25      .25               -         -           -

1997
- ----
Texas                       5.29        4.05     9.34            1.88       .52        2.40
Mississippi                 2.64        2.00     4.64            1.24         -        1.24
Louisiana                   2.35        1.05     3.40            1.05         -        1.05

1996
- ----
Texas                       2.85         .90     3.75            2.91         -        2.91
Mississippi                  .69        2.48     3.17               -       .15         .15
Louisiana                    .25         .26      .51               -         -           -
</TABLE>

     As of December 31, 1998, the Company was participating in the drilling of 2
gross and .52 net wells.
<PAGE>

     The following table sets forth certain information  regarding the Company's
developed and undeveloped  lease acreage as of December 31, 1998. The table does
not include  additional  acreage,  which the Company may earn upon completion of
pending 3D seismic data projects.  "Gross" acres refer to the number of acres in
which the Company owns a working  interest.  "Net" acres refer to the sum of the
fractional working interests owned by the Company in gross acres.
<TABLE>
<CAPTION>
                       Developed Acres              Undeveloped Acres
                 ----------------------------  -----------------------------
                    Gross            Net          Gross            Net
                 -------------   ------------  -------------   -------------

<S>                    <C>            <C>           <C>              <C>
California                  -              -        138,726          41,786
Texas                  25,106         11,267         88,651          24,120
Louisiana               6,864          1,446         79,672          24,164
Mississippi             4,100          1,321         26,806          16,239
Michigan                  260            130          6,000           2,000
Arkansas                    -              -          3,600             450
Alabama                   160              5          1,516             270
                 -------------   ------------  -------------   -------------
Total                  36,490         14,169        344,971         109,029
                 =============   ============  =============   =============
</TABLE>

     The  following  table  describes  for each of the last three fiscal  years,
crude oil  (including  condensate  and  natural  gas  liquids)  and  natural gas
production for the Company,  average  production costs and average sales prices.
All such production  comes from the U.S. Gulf Coast region.  The Company has not
filed any different estimates of its December 31, 1998 reserves with any federal
agencies.
<TABLE>
<CAPTION>
                           Net Production        Average        Average Sales Price
                        ---------------------                 -------------------------
      Year Ended           Oil       Gas        Production        Oil          Gas
     December 31,        (Mbbls)    (Mmcf)    Cost per Mcfe      (Bbls)       (Mcf)
         <S>               <C>      <C>           <C>           <C>           <C>
         1998              386      6,216         $.55          $11.78        $2.27
         1997              420      6,926          .55           16.83         2.63
         1996              363      4,902          .44           18.52         2.28
</TABLE>

     The  amounts  in  1997  and  1996  include   56,000  and  84,000   barrels,
respectively,  and 1,795 and 2,094 million cubic feet,  respectively,  delivered
under the terms of a volumetric  production payment agreement  effective July 1,
1996 at an average  price of $14.04  and  $14.91,  respectively,  per barrel and
$1.84 and $2.15 per mcf, respectively.

ITEM 3.  LEGAL PROCEEDINGS
         -----------------

     The Company is involved from time to time in ordinary,  routine  claims and
lawsuits  incidental to its business.  In the opinion of  management,  uninsured
losses, if any,  resulting from the ultimate  resolution of these matters should
not be material to the Company's financial position or results of operations.


<PAGE>



                                     PART II


ITEM 5. MARKET FOR REGISTRANT'S COMMON STOCK AND RELATED STOCKHOLDER MATTERS
        --------------------------------------------------------------------

     The Company's  Common Stock is traded on the New York Stock  Exchange.  The
following  table sets forth the high and low sales  prices for the Common  Stock
for 1998 and 1997 as reported by the New York Stock Exchange.
<TABLE>
<CAPTION>

                                             1998                             1997(1)<F1>
                                -------------------------------    -------------------------------
                                    High              Low              High              Low
                                -------------     -------------    -------------     -------------
  <S>                         <C>               <C>              <C>               <C>
  First Quarter               $     17.25       $      13.19     $      22.31      $      15.69
  Second Quarter                    19.31              14.69            19.50             16.31
  Third Quarter                     17.25               8.69            22.81             18.44
  Fourth Quarter                    16.00               9.56            25.88             16.00

<FN>
<F1> (1)  All stock market prices have been restated to reflect the  two-for-one
          stock split in December 1997.
</FN>
</TABLE>

     On March 29, 1999,  the closing price for the Common Stock was $14.625.  To
the best of the  Company's  knowledge,  there  are  approximately  1,265  record
holders of the Company's Common Stock as of March 29, 1999.

Dividend Policy
- ---------------

     The Company did not pay cash dividends  during 1997 or 1998, and it intends
to retain future earnings in order to provide funds for use in the operation and
expansion of its  business.  Because the payment of dividends is dependent  upon
earnings,  capital requirements,  financial conditions, any required consents of
lenders and other factors, there is no assurance that dividends,  whether in the
form of stock or cash, will be paid in the future.


<PAGE>


ITEM 6. SELECTED  CONSOLIDATED  FINANCIAL DATA (in  thousands,  except per share
        data)
        ------------------------------------------------------------------------

     The following table summarizes  certain historical  consolidated  financial
data of the  Company  and is  qualified  in its  entirety  by the more  detailed
consolidated financial statements and notes thereto included in Item 8 hereof.
<TABLE>
<CAPTION>
   Statement of Operations Data:                                 Year Ended December 31,
                                        ---------------------------------------------------------------------------
                                           1998             1997            1996           1995             1994
                                        -----------      ----------      ----------     -----------      ----------

<S>                                    <C>              <C>             <C>            <C>              <C>
Revenue                                $    144,857     $   127,556     $   106,002    $     74,439     $    70,902

Expenses and costs:

   Depreciation, depletion and
     amortization                            69,890          49,679          39,249          26,872          27,181
   Impairment of oil and gas
     properties                                   -           9,560               -               -               -
   Cost of sales                              4,874          17,953          19,402          13,071          10,499
   Selling, general and
     administrative                          26,599          23,043          19,165          15,393          14,672
                                        -----------      ----------      ----------     -----------      ----------
                                            101,363         100,235          77,816          55,336          52,352
                                        -----------      ----------      ----------     -----------      ----------

Income from operations                       43,494          27,321          28,186          19,103          18,550

Interest expense, net                        (5,540)         (3,554)         (2,900)         (3,078)         (3,198)
Equity in earnings (loss) of
   affiliate                                    222             146            (186)              -               -
Gain on sale of subsidiary
   stock                                          -          18,449               -               -               -
Increase (decrease) in under-
   lying equity of affiliate                   (193)         10,750               -               -               -
Extinguishment of volumetric
   production payment                             -          (4,133)              -               -               -
                                        -----------      ----------      ----------     -----------      ----------
Income from continuing
   operations before provision
   for income taxes and
   extraordinary item                        37,983          48,979          25,100          16,025          15,352

Provision for income taxes                   13,623          17,422           8,863           5,898           5,681
                                        -----------      ----------      ----------     -----------      ----------
Income from continuing
   operations before
   extraordinary item                        24,360          31,557          16,237          10,127           9,671

Loss from discontinued
   operations, net of tax                         -               -            (988)         (1,196)            (52)
Loss on disposal of
   discontinued operations,
   net of tax                                     -               -               -            (252)              -
                                        -----------      ----------      ----------     -----------      ----------
Income before extraordinary
   item                                      24,360          31,557          15,249           8,679           9,619
Extraordinary charge on early
   extinguishment of debt, net
   of tax                                         -               -               -               -            (304)
                                        -----------      ----------      ----------     -----------      ----------
Net income                             $     24,360     $    31,557     $    15,249    $      8,679     $     9,315
                                        ===========      ==========      ==========     ===========      ==========
</TABLE>


<PAGE>


<TABLE>
<CAPTION>
    Statement of Operations Data:                                 Year Ended December 31,
                                        --------------------------------------------------------------------------
                                           1998            1997            1996           1995             1994
                                        -----------     ----------      ----------     -----------      ----------
<S>                                    <C>             <C>             <C>            <C>              <C>
Earnings per share: (1)<F1>
   Basic:
   Income from continuing
     operations before
     extraordinary item                $       1.07    $      1.48     $       .83    $        .55     $       .68
   Discontinued operations                        -              -            (.05)           (.08)              -
   Extraordinary item                             -              -               -               -            (.02)
                                        -----------     ----------      ----------     -----------      ----------
   Net income                          $       1.07    $      1.48     $       .78    $        .47     $       .66
                                        ===========     ==========      ==========     ===========      ==========

   Diluted:
   Income from continuing
     operations before
     extraordinary item                $       1.05    $      1.43     $       .79    $        .49     $       .55
   Discontinued operations                        -              -            (.05)           (.07)              -
   Extraordinary item                             -              -               -               -            (.02)
                                        -----------     ----------      ----------     -----------      ----------
   Net income                          $       1.05    $      1.43     $       .74    $        .42     $       .53
                                        ===========     ==========      ==========     ===========      ==========

Weighted average shares: (1)<F1>
   - Basic                                   22,720         21,380          19,646          18,408          14,212
   - Diluted                                 23,124         22,050          20,660          20,976          18,237


                                        -----------------------------------------------------------------------------------
                                                                       As of December 31,
                                        -----------------------------------------------------------------------------------
Balance Sheet Data:                        1998              1997              1996             1995               1994
                                        -----------       -----------       -----------      ------------       -----------

Data bank, net                         $    262,950     $    180,936      $    126,998     $     105,369      $     95,801

Oil and gas properties, net                 148,977          112,915            86,572            42,424            21,389

Total assets                                495,767          365,682           294,679           209,567           166,769

Total debt                                  150,690           90,566            86,488            61,283            16,927

Stockholders' equity                        237,587          207,273           155,641           120,378           101,329

Stockholders' equity per
   common share outstanding
   at December 31                      $       9.98     $       9.19      $       7.51     $        6.38      $       5.74

Common shares outstanding at
   December 31 (1)<F1>                       23,805           22,548            20,724            18,874            17,652
<FN>
<F1> (1)  All number of shares and per share  amounts have been restated to give
          effect to the  two-for-one  stock split effected in the form of a 100%
          stock dividend in December 1997.
</FN>
</TABLE>





<PAGE>


ITEM 7. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS
        ------------------------------------------------------------------------

Introduction
- ------------

     The  following  table  sets  forth  selected   financial   information  (in
thousands) for the periods indicated, and should be read in conjunction with the
discussion of Results of Operations below.

<TABLE>
<CAPTION>
                                                                  1998              1997              1996
                                                              ------------      ------------      ------------
<S>                                                          <C>               <C>               <C>
Seismic:
   Revenue                                                   $     125,863     $      85,560     $      67,138
   Amortization                                                     57,117            35,163            30,477
   Cost of sales                                                       191               394               448

Oil and Gas:
   Revenue                                                          18,994            25,680            18,255
   Depletion                                                        11,872            12,666             7,212
   Impairment of oil and gas properties                                  -             9,560                 -
   Cost of sales                                                     4,683             5,168             3,134

Geophysical Services:
   Revenue                                                               -            16,316            20,609
   Depreciation                                                          -               983               951
   Cost of sales                                                         -            12,391            15,820

Other depreciation                                                     901               867               609
Selling, general and administrative                                 26,599            23,043            19,165
Net interest expense                                                 5,540             3,554             2,900
Equity in earnings (loss) of affiliate                                 222               146              (186)
                                                              ------------      ------------      ------------

Income from continuing operations before provision
   for income taxes and special items (1)<F1>                       38,176            23,913            25,100

Provision for income taxes                                          13,692             8,498             8,863
                                                              ------------      ------------      ------------

Income from continuing operations before special items(1)<F1>$      24,484     $      15,415     $      16,237
                                                              ============      ============      ============
Net income                                                   $      24,360     $      31,557     $      15,249
                                                              ============      ============      ============
- ----------------------------------
<FN>
<F1>     (1)      Special  items for the year ended  December 31, 1998 include a
                  pre-tax  loss  of  $193,000  related  to the  decrease  in the
                  underlying equity of an affiliate.  Special items for the year
                  ended  December 31, 1997 include a pre-tax gain of $29,199,000
                  related to the spin-off of the Company's  seismic  acquisition
                  crew  subsidiary  and a pre-tax loss of $4,133,000  related to
                  the  extinguishment  of the  Company's  volumetric  production
                  payment.
</FN>
</TABLE>
<PAGE>

Results of Operations
- ---------------------

     Seismic
     -------

     Revenue from the  marketing of seismic data was  $125,863,000,  $85,560,000
and $67,138,000 during 1998, 1997 and 1996, respectively.  The increases between
years are primarily  attributable  to an increase in demand for  high-resolution
seismic data,  which is being used  increasingly  in oil and gas exploration and
development  efforts  due to  the  increased  probability  of  drilling  success
achieved  when  employing  3-D  seismic  data  in  the  evaluation  of  drilling
prospects.  The Company  believes the demand for its seismic data remains strong
despite  weakness in the energy  sector  driven by depressed oil and gas prices.
This  commodity  price  environment  requires oil and gas  companies to increase
reserves and daily  production  at nominally  lower  finding costs per barrel in
order to sustain  profits.  By properly  utilizing 3D seismic data,  exploration
companies  can  significantly  increase  drilling  success  rates and reduce the
occurrence  of dry holes.  Although  the  acquisition  of 3D  seismic  data does
require a greater  investment  compared to 2D seismic,  new  technology has made
multi-client 3D seismic data more economical to smaller  independent oil and gas
companies. By participating in group shoots, oil and gas companies can share the
cost of  expensive  surveys  that they  could not  otherwise  make on their own.
Further,  oil and gas  companies  have  learned  that 3D  seismic  can  increase
recoveries  of  reserves  from  existing  mature  oil fields by  optimizing  the
drilling location of development wells while also revealing  additional step-out
locations that had not been apparent using 2D seismic. Additionally,  management
believes that the Company will continue to experience a steady demand for its 2D
data  library as oil and gas  companies  initially  use 2D  seismic to  evaluate
prospects. Although many exploration and production companies are reducing their
capital  expenditures in response to low commodity prices,  management  believes
that  seismic  data  expenditures  will  likely be one of the last  areas  where
reductions  are made  because  seismic  is the  information  tool that can allow
companies to lower exploration and development costs. Exploration and production
company employees can work for years on defining prospects to be drilled without
employing most oilfield services, but without seismic data, these geo-scientists
and  engineers  would not have the  essential  tools to generate  and  delineate
drilling prospects.

     Data bank amortization amounted to $57,117,000, $35,163,000 and $30,477,000
for the  years  ended  December  31,  1998,  1997 and 1996,  respectively.  As a
percentage of revenue from licensing  seismic data, data bank  amortization  was
46%, 42% and 47% for 1998,  1997 and 1996,  respectively.  These changes between
years  are  primarily  due to the mix of  sales of 2D and 3D data  amortized  at
varying  percentages  based on each data program's  current and expected  future
revenue stream and, in 1997, an increase in revenue from purchased  seismic data
which is generally  amortized on a straight-line  basis. For a discussion of the
Company's accounting policy related to seismic data amortization refer to Note A
of the Company's Consolidated Financial Statements.

     The Company's (and its industry's) seismic revenue trends are evaluated and
results are used in  estimating  future  revenue  expected to be received on its
seismic  data.  Pricing of  seismic  data is  significant  when it  indicates  a
revision to estimated  future  revenue.  During periods of expected  declines in
activity,  the Company may reduce its estimates of future  revenue,  causing the
amortization rate to rise and liquidity and operating results to decline. If the
Company perceives an impairment in value due to reduced, or a lack of, estimated
future revenue,  a write-down of the asset is recognized.  In periods of upturn,
the opposite may occur, except, however, the prior write-downs are not reversed.
Management believes that the economic outlook for the Company's seismic business
is stable and the possibility for significant improvement exists.

     Oil and Gas
     -----------

     Oil and gas revenue was  $18,994,000,  $25,680,000 and  $18,255,000  during
1998, 1997 and 1996, respectively. The decrease in oil and gas revenue from 1997
to 1998 is primarily  due to lower  realized  commodity  prices along with lower
natural gas  production.  The  production  decline from certain of the Company's
shallow short-lived  producing  properties has not yet been offset by production
from new wells.  Certain  wells with high initial flow rates had decline  curves
earlier and greater than was expected. Additionally, some development wells have
not been  drilled in the time frame  anticipated  by the  Company as a result of
some of its partners  delaying plans to drill such wells due to lower  commodity
prices, reallocation of budget funds and consolidations within the industry. The
increase in oil and gas  revenue  from 1996 to 1997 is  primarily  due to higher
production  resulting  from more wells  being on line in 1997 along with  higher
realized gas prices.  The first year of oil and gas  operations  for the Company
was 1993.  Since then, the Company has steadily  increased its  exploration  and
development  efforts  resulting  in 92 wells  producing  at  December  31,  1996
increasing  to 122 at December  31, 1997 and to 144 at December  31,  1998.  Net

<PAGE>

volume and price  information  for the Company's oil and gas  production for the
years ended  December 31, 1998,  1997 and 1996 is  summarized  in the  following
table  (amounts  include  deliveries  made  under  the  terms  of  a  volumetric
production payment agreement effective from July 1, 1996 to June 30, 1997):
<TABLE>
<CAPTION>
                                                                   Year Ended December 31,
                                                            ------------------------------------
                                                              1998          1997          1996
                                                            --------      --------      --------
<S>                                                        <C>           <C>           <C>
Natural gas volumes (mmcf)                                     6,216         6,926         4,902
Average natural gas price ($/mcf)                          $    2.27     $    2.63     $    2.28
Crude oil/condensate volumes (mbbl)                              386           420           363
Average crude oil/condensate price ($/bbl)                 $   11.78     $   16.83     $   18.52
</TABLE>

     Depletion  of oil and gas  properties,  excluding  the  impairment  in 1997
discussed below, was $11,872,000, $12,666,000 and $7,212,000 for the years ended
December 31, 1998, 1997 and 1996,  respectively,  which amounted to $1.39, $1.34
and $1.02,  respectively,  per mcfe of gas  produced  during such  periods.  The
increase in the rates  between 1996,  1997 and the first three  quarters of 1998
reflects the amount of exploration and development costs incurred  increasing at
a higher rate than the proven  reserve base.  The rate in the fourth  quarter of
1998  decreased  to $.95 per mcfe of gas  produced  from  $1.55 per mcfe for the
first  three  quarters  of  1998.  This  decrease  in  the  rate  is  due to the
significant  increase in the  Company's  proved  reserves as  determined  by the
Company's independent petroleum engineers resulting from both new discoveries in
1998 and positive revisions to previous reserve estimates.  Management currently
anticipates  that the Company's  depletion rate will be less than $1.00 per mcfe
of gas produced during 1999.

     At December 31, 1997, the Company recorded a non-cash impairment of oil and
gas  properties  totaling  $9,560,000  ($6,160,000,  net of taxes)  based on its
December 31, 1997,  estimated  proved  reserves  valued at March 18, 1998 market
prices.  The impairment was primarily due to lower commodity  prices as compared
to the December 31, 1996 and 1997 prices.

     Oil and gas production  costs amounted to $.55,  $.55, and $.44 per mcfe of
gas produced during 1998, 1997 and 1996, respectively.  The increase in the rate
from  1996 to 1997 is  primarily  attributable  to the  number  of oil wells the
Company has in relation  to its total wells as oil wells  typically  have higher
associated  production costs than gas wells.  Additionally,  in 1997, ad valorem
taxes increased as a result of the increase in the value of reserves.

     Geophysical Services
     --------------------

     Revenue from the  acquisition  of  proprietary  seismic data and leasing of
seismic  equipment  ("geophysical  services")  performed by the Company's former
seismic  acquisition crew subsidiary,  Eagle Geophysical,  Inc.  ("Eagle"),  was
$16,316,000 and $20,609,000 for 1997 and 1996,  respectively.  The decrease from
1996  to  1997 is a  result  of the  spin-off  of  Eagle  on  August  11,  1997.
Consequently, the geophysical services revenue for 1997 represents approximately
seven and one-half months, whereas 1996 represented a full year.

     The  decrease in cost of sales from 1996 to 1997 is due to the 1997 cost of
sales  reflecting  only seven and one-half months of activity as a result of the
spin-off of Eagle,  whereas 1996  represented  a full year.  Gross profit margin
related to the acquisition of seismic data for  non-affiliated  parties (revenue
less cost of sales) was 19% and 21% for 1997 and 1996, respectively.

     Corporate and Other
     -------------------

     The Company's selling, general and administrative expenses were $26,599,000
in 1998, $23,043,000 in 1997 and $19,165,000 in 1996. The increase for each year
was primarily a result of variable  expenses,  including  commissions on revenue
and  compensation  tied to pre-tax  profits,  related to the increased volume of
business.  As a percentage of total  revenue,  these  expenses were 18% in 1996,
1997 and 1998.

     The Company's  interest expense was $5,963,000 in 1998,  $4,609,000 in 1997
and $4,063,000 in 1996.  The increase in interest  expense from 1996 to 1997 was
primarily  due to  interest  incurred  on  borrowings  made under the  Company's
revolving  line of credit during 1997 along with the full amount of Senior Notes
being  outstanding for all of 1997 whereas in 1996 $52.5 million was outstanding
for the entire year and $22.5 million was  outstanding  for  approximately  nine
months. The increase from 1997 to 1998 was primarily due to increased borrowings
made under the Company's revolving line of credit during 1998.

     Interest income was $423,000 in 1998,  $1,055,000 in 1997 and $1,163,000 in
1996. The decreases between years were primarily due to the fluctuations in cash
balances available for investment.
<PAGE>

     On August 11, 1997, Eagle completed an initial public offering in which the
Company  sold  1,880,000  of its  3,400,000  shares of Eagle  common  stock as a
selling  stockholder.  The Company received net proceeds of $29,723,000 from its
participation  in the offering,  resulting in a pre-tax gain,  net of costs,  of
$18,449,000  from its sale of Eagle  stock in 1997.  Additionally,  the  Company
recorded a pre-tax gain, net of costs,  of $10,750,000 in 1997,  representing an
increase  in the  Company's  underlying  equity of Eagle as a result of  Eagle's
issuance of stock in connection with the offering.  In 1998,  Eagle issued stock
in  connection  with two  acquisitions,  which  caused  the  Company to record a
pre-tax loss of $193,000. The Company's equity in earnings of Eagle was $146,000
for the period from August 11, 1997 to December  31, 1997 and was  $222,000  for
the year ended December 31, 1998.

     As a result of the offering, the Company now owns 1,520,000 shares of Eagle
common stock,  or 17.3% of the  outstanding  shares of Eagle, at a book value of
$15,544,000  or $10.23 per share.  The Company  accounts for its  investment  in
Eagle using the equity method whereby such  investment is based on the Company's
historical  cost plus the Company's  share of (i) Eagle  earnings and losses and
(ii) Eagle's  equity as a result of issuances of stock.  In accordance  with the
accounting literature, an investment in a company accounted for under the equity
method is carried on such basis  rather than based on the fair  market  value of
the stock  unless an "other than  temporary"  decline in the market value of the
stock has occurred.  Once an "other than temporary"  decline in the market value
of the stock  occurs,  an  impairment  in the carrying  value of the  investment
should be recorded. An "other than temporary" decline is deemed to have occurred
if the fair market value is  depressed  for a period of more than nine to twelve
months.  Eagle's stock has been trading at a price below the Company's  carrying
value since August 1998. If the weakness in commodity prices continues,  and, in
turn the oilfield service sector market values remain depressed, the Company may
be required to record a non-cash,  non-operating  charge for  impairment  in the
carrying value of its investment in Eagle during 1999. At December 31, 1998, the
fair market value of the Company's  investment in Eagle was $5,890,000 or $3.875
per share as quoted by  NASDAQ.  These  shares are  subject  to certain  trading
restrictions.

     The Company entered into an agreement, which was effective July 1, 1997, to
extinguish its volumetric production payment. The cost to acquire the production
payment liability exceeded its book value. As a result of this transaction,  the
Company recorded a pre-tax loss of $4,133,000 in 1997.

     During a portion of 1996,  the  Company  had a 50%  ownership  interest  in
Energy Research  International  ("ERI"), a holding company which wholly owns two
marine seismic companies,  Horizon  Exploration Limited and Horizon Seismic Inc.
The ownership  interest in ERI was reduced to 19% in late 1996. During 1996, the
Company recognized a net loss from its interest in ERI of $186,000. In May 1997,
the Company contributed its 19% ownership interest in ERI to Eagle.

     On March 22, 1996, the Company's Board of Directors  unanimously  adopted a
plan of disposal to  discontinue  the Company's gas  marketing  operations,  the
final disposal and sale of which was completed during the third quarter of 1996.
Accordingly,  the Company's  consolidated  financial  statements present the gas
marketing operations as discontinued  operations for all periods presented.  The
Company  decided  to  refocus  and  concentrate  on its  higher  margin  seismic
technology  operations  and  related  oil and  gas  exploration  and  production
operations in order to maximize  profitability and growth opportunities.  During
1996, a loss from discontinued operations was recorded totaling $988,000,  which
is net of an income tax benefit of $580,000.  The loss  resulted from changes in
market  prices to purchase gas supply.  Such loss  represented  the final charge
related to the discontinued operations.


<PAGE>

Liquidity and Capital Resources
- -------------------------------

     The Company's cash flow from  operations was  $97,493,000,  $76,161,000 and
$67,332,000 for the years ended December 31, 1998, 1997 and 1996,  respectively.
The  increase  from 1997 to 1998 was  primarily  due to (i) an  increase in cash
received  from  customers  due to higher  revenue in 1998 and (ii) a decrease in
cash paid to suppliers and employees due to lower cost of sales incurred in 1998
resulting from the 1997 spin-off of the Company's crew  subsidiary and increased
payable  balances at  December  31,  1998.  The  increase  from 1996 to 1997 was
primarily  due to an  increase in cash  received  from  customers  due to higher
revenues in 1997 offset by a decrease resulting from a non-recurring  volumetric
production payment that was received in 1996.

     On  March  16,  1998,  the  Company  increased  its $50  million  unsecured
revolving line of credit facility to $75 million. The facility bears interest at
a rate  determined  by the  ratio  of the  Company's  debt  to  cash  flow  from
operations. Pursuant to the interest rate pricing structure, funds can currently
be borrowed at LIBOR plus 3/4%, the bank's  prevailing prime rate, or the sum of
the Federal Funds effective rate for such day plus 1/2%. The facility matures on
March 16, 2001. There was no balance outstanding on the revolving line of credit
at March 29, 1999.

     On December 11, 1998, the Company entered into an agreement for a one-year,
$25 million,  unsecured  revolving  line of credit.  On February  12, 1999,  all
amounts  outstanding  under the  revolving  line of credit had been paid and the
line of credit was cancelled.

     On December 28, 1995,  the Company  completed a private  placement of three
series  of   unsecured   Senior  Notes   totaling   $75  million.   The  Company
contemporaneously  issued  its Series A Notes and  Series B Notes,  which  total
$52.5 million and bear interest at a fixed rate of 7.17%.  On April 9, 1996, the
Company  issued its Series C Notes,  which total $22.5 million and bear interest
at a fixed rate of 7.48%.  The Series A Notes mature on December  30, 2001,  and
require annual principal  payments of $8.3 million beginning  December 30, 1999.
The  Series B and  Series C Notes  mature on  December  30,  2002,  and  require
combined  annual  principal  payments of $10 million which began on December 30,
1998.  Interest on all series of the notes is payable  semi-annually  on June 30
and December 30.
<PAGE>

     On February 12, 1999,  the Company  completed a private  placement of three
series of unsecured Senior Notes totaling $138 million. The Series D Notes total
$20 million,  bear  interest at a fixed rate of 7.03% and mature on February 15,
2004, with no principal  payments due until  maturity.  The Series E Notes total
$75 million,  bear  interest at a fixed rate of 7.28% and mature on February 15,
2009, with annual  principal  payments of $12.5 million  beginning  February 15,
2004.  The Series F Notes total $43  million,  bear  interest at a fixed rate of
7.43% and mature on February  15,  2009,  with no  principal  payments due until
Maturity. Interest on all series of the notes is payable semi-annually beginning
on August 15, 1999.  The Company used a portion of the proceeds to repay amounts
outstanding under its $75 million and $25 million revolving lines of credit; the
remainder will be used for capital expenditures.

     The Company may offer from time to time in one or more series (i) unsecured
debt securities, which may be senior or subordinated,  (ii) preferred stock, par
value $0.01 per share,  and (iii) common stock, par value $.01 per share, or any
combination of the foregoing,  up to an aggregate of $41,041,600  pursuant to an
effective "shelf" registration  statement filed with the Securities and Exchange
Commission.

     In  1997,  two of the  Company's  wholly-owned  subsidiaries  obtained  two
separate three-year term loans totaling $361,000. The loans bear interest at the
rate of 7.9%.  The proceeds  were used for the purchase of certain  property and
equipment, which secures the debt. Monthly principal and interest payments total
approximately  $11,000.  The balance outstanding on the loans at March 29, 1999,
was $141,000.

     On October 2, 1998,  the Company  completed a sale of 794,300 shares of its
common  stock to its  employees.  The  Company  granted  five-year  loans to its
employees  for the  purchase  of which 60% of the loan  amount is being  paid in
equal  monthly,  quarterly  or annual  payments,  as  applicable,  and a balloon
payment of the remaining 40% is due on October 2, 2003.

     From  January  1,  1998,  through  March 29,  1999,  the  Company  received
$1,067,000  from the exercise of common stock purchase  warrants and options and
the Company's  401(k) stock purchases.  In connection with these exercises,  the
Company will also receive approximately $357,000 in tax savings.

     During December 1997, the Company  repurchased 175,000 shares of its common
stock in the open market at a cost of $2,973,000, pursuant to a stock repurchase
program authorized by the Board of Directors on December 12, 1997. The Board has
authorized  expenditures  of up to $25  million  towards the  repurchase  of its
common stock.

     During 1998,  gross seismic data bank additions and capitalized oil and gas
exploration  and  development  costs amounted to  $139,117,000  and  $47,934,000
respectively.  Included in the oil and gas exploration and development costs are
$6,323,000  for  the  purchase  of  oil  and  gas  interests  owned  by  certain
partnerships  in exchange  for 355,733  shares of the  Company's  common  stock,
payment of $824,000 and  assumption  of  liabilities  totaling  $1,555,000.  The
remainder of these capital  expenditures,  as well as taxes,  interest expenses,
cost of sales and general and administrative expenses, were funded by operations
and borrowings under the Company's revolving line of credit.

     Currently,  the Company anticipates capital  expenditures for 1999 to total
approximately $169 million. Such expenditures include approximately $149 million
for the creation of proprietary  seismic data, and approximately $20 million for
oil and gas  exploration  and  development  efforts.  The Company  believes  its
current cash  balances,  revenues from  operating  sources and proceeds from the
exercise of common  stock  purchase  warrants  and  options,  combined  with its
available  revolving  line of  credit,  should  be  sufficient  to fund the 1999
capital  expenditures,  along with  expenditures  for  operating and general and
administrative  expenses.  If these  sources  are not  sufficient  to cover  the
Company's  anticipated  expenditures  or if the  Company  were to  increase  its
planned capital  expenditures for 1999, the Company could arrange for additional
debt or equity  financing during 1999;  however,  there can be no assurance that
the Company  would be able to  accomplish  any such debt or equity  financing on
satisfactory  terms.  If such  debt or  equity  financing  is not  available  on
satisfactory  terms,  the Company could reduce its current capital budget or any
proposed  increases to its capital budget,  and fund expenditures with cash flow
generated from operating sources.


<PAGE>



Recent Accounting Pronouncements
- --------------------------------

     In June 1998, the Financial Accounting Standards Board issued SFAS No. 133,
"Accounting for Derivative  Instruments and Hedging  Activities."  The Statement
establishes  accounting and reporting  standards requiring that every derivative
instrument   (including  certain  derivative   instruments   embedded  in  other
contracts)  be  recorded in the  balance  sheet as either an asset or  liability
measured  at  its  fair  value.  The  Statement  requires  that  changes  in the
derivative's  fair value be  recognized  currently in earnings  unless  specific
hedge  accounting  criteria are met.  Special  accounting for qualifying  hedges
allows a derivative's  gains and losses to offset related  results on the hedged
item  in the  income  statement,  and  requires  that a  company  must  formally
document,  designate,  and assess the effectiveness of transactions that receive
hedge  accounting.  Statement 133 is effective for fiscal years  beginning after
June 15, 1999 and cannot be applied retroactively. Statement 133 must be applied
to (a) derivative instruments and (b) certain derivative instruments embedded in
hybrid contracts that were issued,  acquired,  or  substantively  modified after
December 31, 1997 (and, at the Company's election,  before January 1, 1998). The
Company has not yet  quantified the impact of adopting  Statement 133.  However,
the  Company  anticipates  that  application  of the  statement  will not have a
material effect on its consolidated financial statements.

Year 2000
- ---------

     Many currently  installed  computer systems and software products are coded
to accept only two-digit  entries in the date code field.  Beginning in the year
2000,  these  date  code  fields  will  need to  accept  four-digit  entries  to
distinguish  21st century dates from 20th century dates.  As a result,  computer
systems and software  used by many  companies  may need to be upgraded to comply
with such "Year 2000"  requirements.  Significant  uncertainty exists concerning
the potential effects  associated with such compliance,  but systems that do not
properly  recognize such  information  could generate  erroneous data or cause a
system to fail.

     Compliance  Program.  In order to address the Year 2000 issue,  the Company
appointed  the Chief  Operating  Officer  ("COO") to assure  that key  automated
systems and related  processors would remain  functional  through the year 2000.
The COO and the Company's  Information System's Manager addressed the project by
reviewing  the  information  technology  ("IT") and  non-information  technology
systems to determine whether they were Year 2000 compliant.  Also, they prepared
a formal  questionnaire for all significant  suppliers,  customers,  and service
providers to determine  the extent to which the Company was  vulnerable to those
third parties' failure to remediate the Year 2000 problem.

     Company's  State of Readiness.  A review and assessment of the  information
technology and  non-information  technology  systems was completed as of January
31,  1999 and did not  identify  any  material  systems  which are not Year 2000
compliant.  The Company has prepared a formal  questionnaire for all significant
suppliers,  customers and service providers to determine the extent to which the
Company is vulnerable to those third parties' failure to remediate the Year 2000
problem.  Such  questionnaire is in the process of being sent to all significant
suppliers, customers and service providers. The Company has requested that these
companies  respond no later than June 30, 1999.  The Company has  received  oral
assurances of Year 2000  compliance  from many of the third parties with whom it
has  relationships.  The  Company  believes  that  its  operations  will  not be
significantly  disrupted  even if  third  parties  with  whom  the  Company  has
relationships are not Year 2000 compliant.

     Costs to Address Year 2000 Compliance  Issues. The Company believes that it
will not be required to make any material  expenditures to address the Year 2000
problem  as it relates to its  existing  systems.  To date,  costs  incurred  to
address Year 2000  compliance have been internal in nature and have been charged
to income as  incurred.  Such  costs  have been  funded  from cash  provided  by
operating activities. However, uncertainty exists concerning the potential costs
and effects associated with any Year 2000 compliance, and the Company intends to
continue  to  make  efforts  to  ensure  that  third  parties  with  whom it has
relationships  are Year  2000  compliant.  The  Company  is not  aware of any IT
projects that have been delayed due to the Year 2000 compliance program.
<PAGE>

     Risk of  Non-Compliance  and  Contingency  Plan.  The goal of the Year 2000
project has been to ensure that all of the critical systems and processes, which
are under the direct control of the company, remain functional. However, because
certain  systems and processes may be  interrelated  with systems outside of the
control of the company,  there can be no assurance that all implementations will
be  successful.  The principal  area of risk to the Company is thought to be the
contracting  of  seismic  acquisition  crews and  vessels.  A likely  worst case
scenario is that despite the Company's efforts,  there could be a failure of the
global positioning system used by seismic acquisition crews and vessels that the
Company  contracts  which  could  result  in  the  temporary  cessation  of  the
acquisition of seismic data. However, the Company believes that the risk of such
occurrence is low based upon its  discussions  concerning  Year 2000  compliance
with  third  party  seismic  contractors.  As part  of the  Year  2000  project,
contingency plans will be developed to respond to any potential failures as they
may  be  identified.  There  can  be no  assurance  that  unexpected  Year  2000
compliance problems of either the Company or its vendors,  customers and service
providers  would not  materially  and adversely  affect the Company's  business,
financial  condition or operating results.  The Company will continue throughout
1999 to consider the likelihood of a material  business  interruption due to the
Year 2000 issue.

Impact of Inflation and Changing Prices
- ---------------------------------------

     The general  availability  of seismic  equipment and crews and the level of
exploration  activity in the oil and gas  industry  directly  affect the cost of
creating  seismic data.  The pricing of the  Company's  products and services is
primarily a function of these factors.  For these reasons,  the Company does not
believe  inflationary  trends have had any  significant  impact on its financial
operating results during the three years ended December 31, 1998.

Information Regarding Forward Looking Statements
- ------------------------------------------------

     This Annual Report on Form 10-K includes forward looking  statements within
the meaning of Section 27A of the  Securities Act of 1933 and Section 21E of the
Securities  Exchange  Act of  1934.  Although  the  Company  believes  that  its
expectations are based on reasonable assumptions,  it can give no assurance that
its goals will be achieved. Important factors that could cause actual results to
differ  materially from those in the forward looking  statements herein include,
but are not  limited to,  changes in the  exploration  budgets of the  Company's
seismic data and related  services  customers,  actual  customer  demand for the
Company's seismic data and related services, the extent of the Company's success
in acquiring oil and gas properties and in discovering, developing and producing
reserves,  the timing and extent of changes in commodity prices for natural gas,
crude oil and  condensate  and natural gas liquids and conditions in the capital
markets and equity  markets  during the periods  covered by the forward  looking
statements.  See Item 1 - Business-Risk Factors.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
         ----------------------------------------------------------

     The  Company  is  exposed  to market  risk,  including  adverse  changes in
commodity  prices,  interest  rates  and  foreign  currency  exchange  rates  as
discussed below.

Commodity Price Risk
- --------------------

     The Company  produces and sells  natural  gas,  crude oil,  condensate  and
natural  gas  liquids.  As a result,  the  Company's  financial  results  can be
significantly affected as these commodity prices fluctuate widely in response to
changing  market forces.  The Company has a price risk  management  program that
utilizes  derivative  financial  instruments,  principally natural gas swaps, to
reduce the price risks associated with fluctuations in natural gas prices. These
financial  instruments are designated as hedges and accounted for on the accrual
basis with gains and losses being  recognized  based on the type of contract and
exposure being hedged.  Realized gains or losses on natural gas swaps designated
as hedges of anticipated  production are treated as deferred  credits or charges
and are included in other  liabilities or other assets on the balance sheet. Net
gains  and  losses on  natural  gas swaps  designated  as hedges of  anticipated
transactions,  including accrued gains or losses upon maturity or termination of
the contract,  are deferred and recognized in income when the associated  hedged
commodities  are  produced.  The Company did not  materially  hedge  natural gas
prices in 1998 and as of December 31, 1998 did not have any open commodity price
hedges. The Company continually reviews and may alter its hedged positions.

Interest Rate Risk
- ------------------

     The Company may enter into various financial instruments,  such as interest
rate swaps,  to manage the impact of changes in interest rates.  Currently,  the
Company  has no open  interest  rate  swap or  interest  rate  lock  agreements.
Therefore, the Company's exposure to changes in interest rates primarily results
from its  short-term  and long-term  debt with both fixed and floating  interest
rates. The following table presents principal or notional


<PAGE>


amounts  (stated in thousands)  and related  average  interest  rates by year of
maturity for the Company's  debt  obligations  and their  indicated  fair market
value at December 31, 1998:
<TABLE>
<CAPTION>
                                                                                                                     FAIR
                                        1999            2000           2001           2002           TOTAL           VALUE
                                      ---------       ---------      ---------       --------       ---------       --------
<S>                                 <C>             <C>            <C>             <C>            <C>             <C>
Liabilities - Long-Term Debt:
   Variable Rate                    $   19,000      $        -     $   66,500      $       -      $   85,500      $  85,500
   Average Interest Rate                 6.41%               -          6.33%              -           6.35%              -

   Fixed Rate                       $   18,461      $   18,378     $   18,333      $  10,000      $   65,172      $  65,149
   Average Interest Rate                 7.25%           7.25%          7.25%          7.31%           7.26%              -
</TABLE>

Foreign Currency Exchange Rate Risk
- -----------------------------------

     The Company  conducts  business in the Canadian  dollar and pounds sterling
and is therefore  subject to foreign  currency  exchange rate risk on cash flows
related to sales, expenses, financing and investing transactions.  Exposure from
market rate  fluctuations  related to activities in Canada,  where the Company's
functional currency is the Canadian dollar, and in the Cayman Islands, where the
Company's functional currency is pounds sterling, is not material at this time.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
         -------------------------------------------

     The financial statements and financial statement schedules required by this
Item are set forth at the pages indicated in ITEM 14(a) (1) and (2) below.

ITEM 9.  DISAGREEMENTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
         ----------------------------------------------------

         NONE

                                    PART III


ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
         --------------------------------------------------

     The  information  required to be set forth in this Item is  incorporated by
reference  to a  similarly  titled  heading in the  Company's  definitive  proxy
statement  relating to the 1999 annual meeting of its  stockholders  to be filed
with the  Securities  and Exchange  Commission not later than 120 days after the
end of the  fiscal  year  covered  by this Form  10-K  (hereinafter  the  "Proxy
Statement").

ITEM 11.   EXECUTIVE COMPENSATION
           ----------------------

     The information required to be set forth in this Item is incorporated
by reference to a similarly titled heading in the Proxy Statement.

ITEM 12.  SECURITY OWNERSHIP OF BENEFICIAL OWNERS AND MANAGEMENT
          ------------------------------------------------------

     The  information  required to be set forth in this Item is  incorporated by
reference to a similarly titled heading in the Proxy Statement.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
          ----------------------------------------------

     The  information  required to be set forth in this Item is  incorporated by
reference to a similarly titled heading in the Proxy Statement. 

                                    PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K
          ---------------------------------------------------------------

     (a) Documents filed as part of this Report                             Page
         --------------------------------------                             ----

          (1)  Financial Statements:

               Report of Independent Public Accountants                      F-1
               Consolidated Balance Sheets as of
               December 31, 1998 and 1997                                    F-2
               Consolidated Statements of Operations for the
                  years ended December 31, 1998, 1997, and 1996              F-4
               Consolidated Statements of Stockholders' Equity for
                  the years ended December 31, 1998, 1997 and 1996           F-5
               Consolidated Statements of Cash Flows for the years
                  ended December 31, 1998, 1997 and 1996                     F-6
               Notes to Consolidated Financial Statements                    F-8

          (2)  All schedules are omitted  because they are not applicable or the
               required  information is shown in the financial statements or the
               notes to the financial statements.

          (3)  Exhibits:

               3.1  Certificate  of  Incorporation  of the Company  filed May 7,
                    1982 and Amendment to  Certificate  of  Incorporation  filed
                    April 25, 1984 (1)

               3.2  Amendment to  Certificate of  Incorporation  filed August 4,
                    1987 (3)

               3.3  Amendment to Certificate of Incorporation  filed January 18,
                    1989 (4)

               3.4  Amendment to  Certificate  of  Incorporation  filed July 13,
                    1989 (5)

               3.5  Amendment to  Certificate of  Incorporation  filed August 3,
                    1993 (11)

               3.6  Amendment to Certificate of Incorporation filed November 21,
                    1997 (23)

               3.7  By-Laws of the Company (1)

               3.8  Corporate Resolution  reflecting an Amendment to the By-Laws
                    of the Company adopted January 6, 1989 (3)

               3.9  Corporate Resolution  reflecting an Amendment to the By-Laws
                    of the Company adopted May 19, 1986 (5)

               4.1  Specimen of Common Stock Certificate (1)

               4.2  Form of Warrant Certificate granted to certain employees and
                    one Director of the Company in December 1990 and expiring in
                    December 2000 (8)

               4.3  Form of Promissory  Note for Employee  Stock  Purchase dated
                    July 21, 1992 (10)

               4.4  Form of  Subscription  Agreement for Employee Stock Purchase
                    dated July 21, 1992 (10)

               4.5  Form of Pledge for Employee  Stock  Purchase  dated July 21,
                    1992 (10)

               4.6  Form of Warrant  Certificate  granted under the 1994 Warrant
                    Plans (14)

               4.7  Form of Warrant  Certificate  granted under the 1995 Warrant
                    Reload Plan (17)

               4.8  Form of  Executive  Warrant  Certificate  granted to certain
                    employees  of the Company in November  1997 and  expiring in
                    November 2002 (23)

               4.9  Form of Bonus Warrant  Certificate granted to an employee of
                    the Company in November  1997 and expiring in November  2002
                    (23)


<PAGE>



          (3)  Exhibits, continued...

               4.10 Seitel,  Inc. 1998 Employee  Stock  Purchase Plan  including
                    Form of Common Stock Purchase Warrant (25)

               4.11 Amendment  No. 1 to the Seitel,  Inc.  1998  Employee  Stock
                    Purchase Plan (27)

               4.12 Form of Departure  Warrant  granted to certain  employees of
                    the Company in August 1997 (26)

               4.13 Form of  Employment  Warrant  granted to an  employee of the
                    Company in April 1998 and expiring in April 2008 (26)

               4.14 Form of  Employment  Warrant  granted to an  employee of the
                    Company in April 1998 and expiring in April 2008 (26)

               10.1 Incentive Stock Option Plan of the Company (1)

               10.2 Non-Qualified Stock Option Plan of the Company (1)

               10.3 1993 Incentive Stock Option Plan of the Company (11)

               10.4 Amendment  No. 1 to the Seitel,  Inc. 1993  Incentive  Stock
                    Option Plan (16)

               10.5 Statement of Amendments  effective November 29, 1995, to the
                    Seitel, Inc. 1993 Incentive Stock Option Plan (19)

               10.6 Statement of  Amendments  effective  April 22, 1996,  to the
                    Seitel, Inc. 1993 Incentive Stock Option Plan (19)

               10.7 Amendment to the Seitel,  Inc. 1993  Incentive  Stock Option
                    Plan effective December 31, 1996 (21)

               10.8 Amendment to Limit Options  Granted to a Single  Participant
                    under the Seitel, Inc. 1993 Incentive Stock Option Plan (23)

               10.9 Amendment  to  Increase  Number  of  Shares   Available  for
                    Granting Options under the Seitel, Inc. 1993 Incentive Stock
                    Option Plan (23)

              10.10 Non-Employee  Directors'  Stock  Option  Plan of the Company
                    (13)

              10.11 Amendment to the Seitel, Inc. Non-Employee  Directors' Stock
                    Option Plan effective December 31, 1996 (21)

              10.12 Seitel, Inc.  Non-Employee  Directors' Deferred Compensation
                    Plan (19)

              10.13 Seitel,  Inc.  Amended and Restated 1995 Warrant Reload Plan
                    (20)

              10.14 Amendment  to the Seitel,  Inc.  Amended and  Restated  1995
                    Warrant Reload Plan effective December 31, 1996 (21)

              10.15 Memorandum   of   Understanding   between  the  Company  and
                    Triangle Geophysical Company dated as of June 7, 1984 (1)

              10.16 Lease Agreement by and between the Company and  Commonwealth
                    Computer Advisors, Inc. (2)

              10.17  The Company's 401(k) Plan adopted February 27, 1995 (14)



<PAGE>



          (3)  Exhibits, continued...

              10.18 The Company's 401(k) Plan adopted January 1, 1998 (23)

              10.19 Executive Services Agreement dated April 3, 1990 between the
                    Company and Helm Resources, Inc. (7)

              10.20 Employment   Agreement  effective  as  of  January  1,  1991
                    between the Company and Paul A. Frame, Jr. (9)

              10.21 Amendment  to  Employment  Agreement  dated  effective as of
                    January 1, 1998  between the Company and Paul A. Frame,  Jr.
                    (23)

              10.22 Employment   Agreement  effective  as  of  January  1,  1991
                    between the Company and Horace A. Calvert (9)

              10.23 Amendment  to  Employment  Agreement  dated  effective as of
                    January 1, 1998  between the  Company and Horace A.  Calvert
                    (23)

              10.24 Employment   Agreement  effective  as  of  January  1,  1991
                    between the Company and Herbert M. Pearlman (9)

              10.25 Amendment  to  Employment  Agreement  dated  effective as of
                    January 1, 1998 between the Company and Herbert M.  Pearlman
                    (23)

              10.26 Employment   Agreement  effective  as  of  January  1,  1991
                    between the Company and David S. Lawi (9)

              10.27 Amendment  to  Employment  Agreement  dated  effective as of
                    January 1, 1998 between the Company and David S. Lawi (23)

              10.28 Employment   Agreement  effective  as  of  January  1,  1993
                    between the Company and Debra D. Valice (12)

              10.29 Amendment  to  Employment  Agreement  dated  effective as of
                    January 1, 1998 between the Company and Debra D. Valice (23)

              10.30 Amendment  to  Employment  Agreement  dated  effective as of
                    June 10, 1998 between the Company and Debra D. Valice (24)

              10.31 Joint Venture  Agreement  dated April 5, 1990 by and between
                    Seitel  Offshore  Corp.,  a  wholly-owned  subsidiary of the
                    Company, and Digicon Data Inc., a wholly-owned subsidiary of
                    Digicon Geophysical Corp. (6)

              10.32 Loan  and  Security  Agreement  dated  as of July  9,  1996,
                    between Seitel  Geophysical,  Inc.  (Company's  wholly-owned
                    subsidiary)  and  NationsBanc  Leasing  Corporation of North
                    Carolina (19)

              10.33 Assumption  and  Consent  dated  December  31,  1996,  among
                    Seitel    Geophysical,    Inc.    (Company's    wholly-owned
                    subsidiary), Eagle Geophysical, Inc. (Company's wholly-owned
                    subsidiary),   NationsBanc   Leasing  Corporation  of  North
                    Carolina, and Seitel, Inc. (21)

              10.34 Revolving  Credit Agreement dated as of July 22, 1996, among
                    Seitel, Inc. and The First National Bank of Chicago (19)

              10.35 First Amendment to Seitel,  Inc.  Revolving Credit Agreement
                    dated as of August 30,  1996 among the Company and The First
                    National Bank of Chicago (20)


<PAGE>



          (3)  Exhibits, continued...

              10.36 Second  Amendment to Revolving  Credit Agreement dated as of
                    July 22, 1996,  among  Seitel,  Inc. and The First  National
                    Bank of Chicago (22)

              10.37 Ratable  Note in the  amount of  $20,000,000  among  Seitel,
                    Inc. and Bank One, Texas, N.A. dated as of May 1, 1997 (22)

              10.38 Ratable  Note in the  amount of  $30,000,000  among  Seitel,
                    Inc. and The First  National Bank of Chicago dated as of May
                    1, 1997 (22)

              10.39 Third  Amendment to Revolving  Credit  Agreement dated as of
                    March 16, 1998 among  Seitel,  Inc.  and The First  National
                    Bank of Chicago (23)

              10.40 Ratable  Note in the  amount of  $40,000,000  among  Seitel,
                    Inc. and The First  National Bank of Chicago dated March 16,
                    1998 (23)

              10.41 Ratable  Note in the  amount of  $35,000,000  among  Seitel,
                    Inc. and Bank One,  Texas,  N.A.  dated as of March 16, 1998
                    (23)

              10.42 Loan and  Security  Agreement  dated as of February 6, 1997,
                    between  Eagle  Geophysical,  Inc.  (Company's  wholly-owned
                    subsidiary),    Seitel   Geophysical,    Inc.,    (Company's
                    wholly-owned    subsidiary),    and   NationsBanc    Leasing
                    Corporation of North Carolina (21)

              10.43 Incentive Compensation Agreement (10)

              10.44 Shareholder Value Bonus Agreement  effective as of March 18,
                    1994 (13)

              10.45 Amendment to Shareholder Value Bonus Agreement  effective as
                    of March 18, 1994 (15)

              10.46 Seitel,  Inc. 1995  Shareholder  Value  Incentive Bonus Plan
                    (16)

              10.47 Terms  Agreement  dated July 28,  1994,  between the Company
                    and Bear, Stearns & Co., Inc. (13)

              10.48 Note  Purchase  Agreement  dated as of  December  28,  1995,
                    between the Company and the Series A Purchasers,  the Series
                    B Purchasers and the Series C Purchasers (18)

              10.49 Revolving  Credit  Agreement  dated as of December 11, 1998,
                    between the Company and Suntrust Bank, Atlanta *

              10.50 Note  Purchase  Agreement  dated as of  February  12,  1999,
                    between the Company and the Series D Purchasers,  the Series
                    E Purchasers and the Series F Purchasers *

               21.1 Subsidiaries of the Registrant *

               23.1 Consent of Arthur Andersen LLP *

               23.2 Consent of Forrest A. Garb & Associates, Inc.*

          (b)  Reports on Form 8-K filed during the quarter  ended  December 31,
               1998:

               NONE

               ------------------
               *    Filed herewith

<PAGE>



          (3)  Exhibits, continued...

               (1)  Incorporated  by  reference  to the  Company's  Registration
                    Statement,  as amended,  on Form S-1,  No.  2-92572 as filed
                    with the  Securities  and Exchange  Commission  on August 3,
                    1984.

               (2)  Incorporated by reference to Post-Effective  Amendment No. 2
                    to the  Company's  Registration  Statement on Form S-2, File
                    No.  33-32838,  as filed with the  Securities  and  Exchange
                    Commission on October 10, 1991.

               (3)  Incorporated  by  reference  to the  Company's  Registration
                    Statement,  as amended,  on Form S-2, No.  33-21300 as filed
                    with the  Securities  and Exchange  Commission  on April 18,
                    1988.

               (4)  Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1988.

               (5)  Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1989.

               (6)  Incorporated  by reference to the Company's  Form 8 amending
                    the Company's  Annual Report on Form 10-K for the year ended
                    December 31, 1989.

               (7)  Incorporated  by  reference  to the  Company's  Registration
                    Statement,  as amended,  on Form S-2, No.  33-34217 as filed
                    with the Commission on April 6, 1990.

               (8)  Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1990.

               (9)  Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended June 30, 1991.

               (10) Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1992.

               (11) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended June 30, 1993.

               (12) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended September 30, 1993.

               (13) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended June 30, 1994.

               (14) Incorporated  by  reference  to the  Company's  Registration
                    Statement  on Form  S-8,  No.  33-89934  as  filed  with the
                    Securities and Exchange Commission on March 2, 1995.

               (15) Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1994.

               (16) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended June 30, 1995.

               (17) Incorporated  by  reference  to the  Company's  Registration
                    Statement  on Form  S-8,  No.  333-01271  as filed  with the
                    Securities and Exchange Commission on February 28, 1996.

               (18) Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1995.



<PAGE>



          (3)  Exhibits, continued...

               (19) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended June 30, 1996.

               (20) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended September 30, 1996.

               (21) Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1996.

               (22) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended March 31, 1997.

               (23) Incorporated by reference to the Company's  Annual Report on
                    Form 10-K for the year ended December 31, 1997.

               (24) Incorporated by reference to the Company's Form 10-Q for the
                    quarter ended June 30, 1998.

               (25) Incorporated  by  reference  to the  Company's  Registration
                    Statement  on Form  S-8,  No.  333-63383  as filed  with the
                    Securities and Exchange Commission on September 15, 1998.

               (26) Incorporated  by  reference  to the  Company's  Registration
                    Statement  on Form  S-8,  No.  333-64557  as filed  with the
                    Securities and Exchange Commission on September 29, 1999.

               (27) Incorporated by reference to Post Effective  Amendment No. 2
                    to the  Company's  Registration  Statement  on Form S-8, No.
                    333-63383  as  filed  with  the   Securities   and  Exchange
                    Commission on October 2, 1998.



<PAGE>


                                   SIGNATURES

Pursuant to the  requirements  of Section 13 or 15 (d) of the  Securities Act of
1934,  the  Registrant  has duly caused this report on Form 10-K to be signed on
its  behalf  by the  undersigned,  thereunto  duly  authorized,  in the  City of
Houston, State of Texas, on the 30th of March, 1999.

                                 SEITEL, INC.


                                  By: /s/Paul A. Frame
                                      ------------------------------------------
                                         Paul A. Frame
                                         President


                                  By: /s/Debra D. Valice
                                      ------------------------------------------
                                         Debra D. Valice
                                         Chief Financial Officer


                                  By: /s/Marcia H. Kendrick
                                      ------------------------------------------
                                         Marcia H. Kendrick
                                         Chief Accounting Officer

Pursuant to the  requirements of the Securities Act of 1934, this Report on Form
10-K has been signed below by the following persons in the capacities and on the
date indicated.

         Signature                   Title                         Date
         ---------                   -----                         ----

/s/  Herbert M. Pearlman        Chairman of the               March   30, 1999
- --------------------------      Board of Directors
     Herbert M. Pearlman


/s/  Paul A. Frame              President and Chief           March   30, 1999
- --------------------------      Executive Officer,
     Paul A. Frame              Director


/s/  Horace A. Calvert          Executive Vice President      March   30, 1999
- --------------------------      and Chief Operating
     Horace A. Calvert          Officer, Director


/s/  Debra D. Valice            Executive Vice President-     March   30, 1999
- --------------------------      Finance, Chief Financial
     Debra D. Valice            Officer, Secretary and
                                Treasurer, Director


/s/  David S. Lawi              Director                      March   30, 1999
- --------------------------
     David S. Lawi


/s/  Walter M. Craig, Jr.       Director                      March   30, 1999
- --------------------------
     Walter M. Craig, Jr.


/s/  William Lerner             Director                      March   30, 1999
- --------------------------
     William Lerner


/s/  John Stieglitz             Director                      March   30, 1999
- --------------------------
     John Stieglitz


/s/  Fred S. Zeidman            Director                      March   30, 1999
- --------------------------
     Fred S. Zeidman


<PAGE>










                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


To Seitel, Inc.:

We have audited the accompanying  consolidated balance sheets of Seitel, Inc. (a
Delaware corporation) and subsidiaries as of December 31, 1998 and 1997, and the
related  consolidated  statements of operations,  stockholders'  equity and cash
flows for each of the three years in the period ended  December 31, 1998.  These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects,  the financial position of Seitel,  Inc. and subsidiaries
as of December 31, 1998 and 1997, and the results of their  operations and their
cash flows for each of the three years in the period ended December 31, 1998, in
conformity with generally accepted accounting principles.




ARTHUR ANDERSEN LLP


Houston, Texas
March 25, 1999



















                                                            F-1


<PAGE>


SEITEL, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(In thousands)
<TABLE>
<CAPTION>
                                                                                                   December 31,
                                                                                        ----------------------------------
                                                                                           1998                   1997
                                                                                        ----------             -----------
<S>                                                                                    <C>                    <C>
ASSETS

   Cash and equivalents                                                                $     3,161            $      4,881
   Receivables
     Trade, less allowance for doubtful accounts of $936 and $561
       at December 31, 1998 and 1997, respectively                                          59,244                  45,482
     Notes and other                                                                           581                   1,202

   Data bank                                                                               513,037                 373,920
     Less:  Accumulated amortization                                                      (250,087)               (192,984)
                                                                                        ----------             -----------
       Net data bank                                                                       262,950                 180,936

   Property and equipment, at cost:
     Oil and gas properties, full-cost method of accounting,
       including $53,458 and $39,436 not being amortized at
       December 31, 1998 and 1997, respectively                                            194,576                 146,642
     Furniture, fixtures and other                                                           6,237                   5,442
                                                                                        ----------             -----------
                                                                                           200,813                 152,084
     Less:  Accumulated depreciation, depletion and amortization                           (49,542)                (36,820)
                                                                                        ----------             -----------
       Net property and equipment                                                          151,271                 115,264

   Investment in affiliate                                                                  15,544                  15,054

   Prepaid expenses, deferred charges and other assets                                       3,016                   2,863
                                                                                        ----------             -----------

   TOTAL ASSETS                                                                        $   495,767            $    365,682
                                                                                        ==========             ===========
</TABLE>





















                     The accompanying notes are an integral
                part of these consolidated financial statements.
                                       F-2


<PAGE>


SEITEL, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS -- continued
(In thousands, except share and per share amounts)
<TABLE>
<CAPTION>
                                                                                                    December 31,
                                                                                        ------------------------------------
                                                                                           1998                     1997
                                                                                        -----------             ------------
<S>                                                                                    <C>                     <C>
LIABILITIES AND STOCKHOLDERS' EQUITY

   Accounts payable                                                                    $     31,839            $      22,423
   Accrued liabilities                                                                        6,882                    5,330
   Employee compensation payable                                                              5,717                      261
   Payable to affiliate                                                                      27,117                   12,500
   Income taxes payable                                                                       1,056                    1,242
   Debt
     Senior Notes                                                                            65,000                   75,000
     Line of credit                                                                          85,500                   15,000
     Term loans                                                                                 172                      477
   Obligations under capital leases                                                              18                       89
   Contingent payables                                                                          274                      274
   Deferred income taxes                                                                     28,039                   18,050
   Deferred revenue                                                                           6,566                    7,763
                                                                                        -----------             ------------
 TOTAL LIABILITIES                                                                          258,180                  158,409
                                                                                        -----------             ------------

CONTINGENCIES AND COMMITMENTS

STOCKHOLDERS' EQUITY

   Preferred stock, par value $.01 per share; authorized 5,000,000
     shares; none issued                                                                          -                        -
   Common stock, par value $.01 per share; authorized
     50,000,000 shares; issued and outstanding 23,804,508 and
     22,548,408 at December 31, 1998 and 1997, respectively                                     238                      225
   Additional paid-in capital                                                               141,826                  128,406
   Retained earnings                                                                        107,102                   82,742
   Treasury stock, 175,818 shares at cost at December 31,
     1998 and 1997                                                                           (2,977)                  (2,977)
   Notes receivable from officers and employees                                              (8,651)                  (1,109)
   Accumulated other comprehensive income (loss)                                                 49                      (14)
                                                                                        -----------             ------------
TOTAL STOCKHOLDERS' EQUITY                                                                  237,587                  207,273
                                                                                        -----------             ------------

TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                                             $    495,767            $     365,682
                                                                                        ===========             ============
</TABLE>















                     The accompanying notes are an integral
                part of these consolidated financial statements.
                                       F-3


<PAGE>


SEITEL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share amounts)
<TABLE>
<CAPTION>
                                                                                        Year Ended December 31,
                                                                           -----------------------------------------------
                                                                              1998               1997              1996
                                                                           -----------       -----------       -----------
<S>                                                                       <C>               <C>               <C>
REVENUE                                                                   $    144,857      $    127,556      $    106,002

EXPENSES
   Depreciation, depletion and amortization                                     69,890            49,679            39,249
   Impairment of oil and gas properties                                              -             9,560                 -
   Cost of sales                                                                 4,874            17,953            19,402
   Selling, general and administrative expenses                                 26,599            23,043            19,165
                                                                           -----------       -----------       -----------
                                                                               101,363           100,235            77,816
                                                                           -----------       -----------       -----------

INCOME FROM OPERATIONS                                                          43,494            27,321            28,186

Interest expense                                                                (5,963)           (4,609)           (4,063)
Interest income                                                                    423             1,055             1,163
Equity in earnings (loss) of affiliate                                             222               146              (186)
Gain on sale of subsidiary stock                                                     -            18,449                 -
Increase (decrease) in underlying equity of affiliate                             (193)           10,750                 -
Extinguishment of volumetric production payment                                      -            (4,133)                -
                                                                           -----------       -----------       -----------
Income from continuing operations before provision for
   income taxes                                                                 37,983            48,979            25,100

Provision for income taxes                                                      13,623            17,422             8,863
                                                                           -----------       -----------       -----------
Income from continuing operations                                               24,360            31,557            16,237
Loss from discontinued operations, net of income tax
   benefit of $580 for 1996                                                          -                 -              (988)
                                                                           -----------       -----------       -----------

NET INCOME                                                                $     24,360      $     31,557      $     15,249
                                                                           ===========       ===========       ===========

Earnings per share:
   Basic:
     Income from continuing operations                                    $       1.07      $       1.48      $        .83
     Loss from discontinued operations                                               -                 -              (.05)
                                                                           -----------       -----------       -----------
     Net income                                                           $       1.07      $       1.48      $        .78
                                                                           ===========       ===========       ===========
   Diluted:
     Income from continuing operations                                    $       1.05      $       1.43      $        .79
     Loss from discontinued operations                                               -                 -              (.05)
                                                                           -----------       -----------       -----------
     Net income                                                           $       1.05      $       1.43      $        .74
                                                                           ===========       ===========       ===========

Weighted average number of common and common equivalent shares:
   Basic                                                                        22,720            21,380            19,646
                                                                           ===========       ===========       ===========
   Diluted                                                                      23,124            22,050            20,660
                                                                           ===========       ===========       ===========
</TABLE>








                     The accompanying notes are an integral
                part of these consolidated financial statements.
                                       F-4


<PAGE>
SEITEL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
(In thousands, except share amounts)
<TABLE>
<CAPTION>
                                                                                                              
                                                                                                     Notes
                                                                                                  Receivable  Accumulated
                                        Common Stock       Additional            Treasury Stock      from        Other
                         Comprehensive------------------    Paid-In   Retained   ---------------  Officers &  Comprehensive
                             Income     Shares    Amount    Capital   Earnings   Shares   Amount   Employees    Income
                            --------  ----------  ------    -------    -------   -------  ------   --------   ----------

<S>                        <C>         <C>       <C>       <C>        <C>           <C>  <C>      <C>        <C>
Balance, December 31, 1995             9,436,854 $    94   $ 85,821   $ 35,936      (414)$    (4) $  (1,395) $       (74)
   Net proceeds from
     issuance
     of common stock                     578,869       7     11,142          -         5       -          -            -
   Acquisition of equity
     interest in affiliate               132,075       1      3,499          -         -       -          -            -
   Tax reduction from
     exercise
     of stock options                          -       -      3,204          -         -       -          -            -
   Conversions and
     exchanges of sub-
     ordinated debentures                214,304       2      1,878          -         -       -          -            -
   Payments received on
     notes receivable from
     officers and employees                    -       -          -          -         -       -        190            -
   Net income              $  15,249           -       -          -     15,249         -       -          -            -
   Foreign currency
     translation
     adjustments                  91           -       -          -          -         -       -          -           91
                            --------
   Comprehensive income    $  15,340
                            ========  ----------  ------    -------    -------   -------  ------   --------   ----------

Balance, December 31, 1996            10,362,102     104    105,544     51,185      (409)     (4)    (1,205)          17

   Net proceeds from
     issuance
     of common stock                     912,472       8     17,318          -         -       -          -            -
   Two-for-one stock split            11,273,834     113       (113)         -      (409)      -          -            -
   Tax reduction from
     exercise
     of stock options                          -       -      5,657          -         -       -          -            -
   Treasury stock
     purchased                                 -       -          -          -  (175,000) (2,973)         -            -
   Payments received on
     notes receivable from
     officers and employees                    -       -          -          -         -       -         96            -
   Net income              $  31,557           -       -          -     31,557         -       -          -            -
   Foreign currency
     translation
     adjustments                 (31)          -       -          -          -         -       -          -          (31)
                            --------
   Comprehensive income    $  31,526
                            ========  ----------  ------    -------    -------  --------  ------   --------   ----------

Balance, December 31, 1997            22,548,408     225    128,406     82,742  (175,818) (2,977)    (1,109)         (14)

   Net proceeds from
     issuance
     of common stock                     106,067       1        983          -         -       -          -            -
   Tax reduction from
     exercise
     of stock options                          -       -        344          -         -       -          -            -
   Sale of common stock to
     officers and employees              794,300       8      8,183          -         -       -     (8,191)           -
   Acquisition of oil and
     gas properties                      355,733       4      3,910          -         -       -          -            -
   Payments received on
     notes receivable from
     officers and employees                    -       -          -          -         -       -        649            -
   Net income              $  24,360           -       -          -     24,360         -       -          -            -
   Foreign currency
     translation
     adjustments net of
     income tax expense
     of $67                       63           -       -          -          -         -       -          -           63
                            --------
   Comprehensive income    $  24,423
                            ========  ----------  ------    -------    -------   -------  ------   --------   ----------

Balance, December 31, 1998            23,804,508 $   238   $141,826   $107,102  (175,818)$(2,977) $  (8,651) $        49
                                      ==========  ======    =======    =======   =======  ======   ========   ==========
</TABLE>
                     The accompanying notes are an integral
                part of these consolidated financial statements.
                                       F-5
<PAGE>
SEITEL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
 (In thousands)                                                                    Year Ended December 31,
                                                                         ------------------------------------------
                                                                            1998             1997           1996
                                                                         ----------       ---------      ----------
<S>                                                                     <C>              <C>            <C>
Cash flows from operating activities:
  Cash received from customers                                          $   128,747      $  123,795     $    93,119
  Proceeds from volumetric production payment                                     -               -          19,000
  Cash paid to suppliers and employees                                      (22,549)        (41,652)        (40,066)
  Interest paid                                                              (5,792)         (4,584)         (4,148)
  Interest received                                                             398             955           1,181
  Income taxes paid                                                          (3,311)         (2,353)         (1,754)
                                                                         ----------       ---------      ----------
     Net cash provided by operating activities                               97,493          76,161          67,332
                                                                         ----------       ---------      ----------
Cash flows from investing activities:
  Cash invested in seismic data                                            (119,267)        (76,616)        (49,716)
  Cash invested in oil and gas properties                                   (40,929)        (55,480)        (48,429)
  Cash paid to acquire property and equipment                                  (839)         (8,772)         (8,224)
  Cash from disposal of property and equipment                                   17              28              59
  Proceeds from sale of stock of subsidiary                                       -          29,723               -
  Costs related to sale of stock of subsidiary                                    -          (5,435)              -
  Cash received from affiliate for advances                                       -           2,094               -
  Collections on loans made                                                       -           5,415             327
  Loan made to unconsolidated affiliate                                           -               -          (2,000)
  Cost of investment made in unconsolidated affiliate                             -               -            (109)
                                                                         ----------       ---------      ----------
     Net cash used in investing activities                                 (161,018)       (109,043)       (108,092)
                                                                         ----------       ---------      ----------
Cash flows from financing activities:
  Borrowings under line of credit agreement                                 108,812          63,500               -
  Principal payments under line of credit
     agreement                                                              (38,312)        (48,500)              -
  Borrowings under term loans                                                     -           7,925           7,697
  Principal payments on term loans                                             (305)         (2,301)         (1,743)
  Principal payments under capital lease
     obligations                                                                (71)           (828)         (1,301)
  Proceeds from issuance of senior notes                                          -               -          22,500
  Principal payments under senior notes                                     (10,000)              -               -
  Proceeds from issuance of common stock                                      1,063          17,361          11,184
  Costs of debt and equity transactions                                         (79)            (35)           (860)
  Repurchase of common stock                                                      -          (2,735)              -
  Payments on notes receivable from officers
     and employees                                                              649              96             190
                                                                         ----------       ---------      ----------
     Net cash provided by financing activities                               61,757          34,483          37,667
                                                                         ----------       ---------      ----------
Effect of exchange rate changes                                                  48             (60)            (43)
                                                                         ----------       ---------      ----------
Net increase (decrease) in cash and equivalents                              (1,720)          1,541          (3,136)

Cash and equivalents at beginning of period                                   4,881           3,340           6,476
                                                                         ----------       ---------      ----------
Cash and equivalents at end of period                                   $     3,161      $    4,881     $     3,340
                                                                         ==========       =========      ==========
</TABLE>



                     The accompanying notes are an integral
                part of these consolidated financial statements.

                                      F-6


<PAGE>


SEITEL, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS--continued
(In thousands)
<TABLE>
<CAPTION>
                                                                                     Year Ended December 31,
                                                                         ----------------------------------------------
                                                                             1998              1997             1996
                                                                         -----------       -----------      -----------

<S>                                                                     <C>               <C>              <C>
Reconciliation of net income to net cash provided
   by operating activities:

Net income                                                              $     24,360      $     31,557     $     15,249
Adjustments to reconcile net income to net cash
   provided by operating activities:

   Gain on sale of subsidiary stock                                                -           (18,449)               -
   Decrease (increase) in underlying equity of affiliate                         193           (10,750)               -
   Extinguishment of volumetric production payment                                 -             4,133                -
   Loss from discontinued operations, net of tax                                   -                 -              988
   Equity in loss (earnings) of affiliate                                       (222)             (146)             186
   Depreciation, depletion and amortization                                   69,890            62,293           40,229
   Deferred income tax provision                                               9,989             8,257            3,321
   Non-cash sales                                                             (1,140)                -                -
   Gain on sale of property and equipment                                        (32)              (16)             (40)
   Amortization of deferred revenue                                                -            (4,079)          (5,740)
   Increase in receivables                                                   (14,706)           (3,544)         (12,155)
   Increase in other assets                                                     (314)             (849)          (1,143)
   Discount on note receivable                                                     -              (198)             198
   Proceeds from volumetric production payment                                     -                 -           19,000
   Increase in accounts payable and other liabilities                          9,475             7,952           10,996
                                                                         -----------       -----------      -----------
     Total adjustments                                                        73,133            44,604           55,840
                                                                         -----------       -----------      -----------
Net cash provided by (used in) operating activities of:
   Continuing operations                                                      97,493            76,161           71,089
   Discontinued operations                                                         -                 -           (3,757)
                                                                         -----------       -----------      -----------
Net cash provided by operating activities                              $      97,493     $      76,161    $      67,332
                                                                         ===========       ===========      ===========
</TABLE>


























                     The accompanying notes are an integral
                part of these consolidated financial statements.
                                       F-7


<PAGE>


SEITEL, INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
DECEMBER 31, 1998

NOTE A--SIGNIFICANT ACCOUNTING POLICIES

     Nature of Operations: Seitel, Inc. (the "Company") is a leading diversified
energy company  providing seismic data and related  geophysical  services to the
oil and gas industry and directly  participates in exploration,  development and
ownership of natural gas and crude oil  reserves.  The majority of the Company's
seismic  surveys  cover  onshore and offshore the U.S.  Gulf Coast  region.  The
Company's oil and gas exploration,  development and production activities are on
properties  located  primarily  in  the  onshore  Gulf  Coast  areas  of  Texas,
Louisiana, Alabama and Mississippi, as well as California and Arkansas.


     In the course of its  operations,  the  Company is subject to certain  risk
factors,  including  but not  limited to the  following:  competition,  industry
conditions, volatility of oil and gas prices, operating risks, dependence of key
personnel,   geographic   concentration   of  operations  and  compliance   with
governmental regulations.


     Use  of  Estimates:   The  preparation  of  these  consolidated   financial
statements  requires the use of certain  estimates by management in  determining
the Company's assets,  liabilities,  revenues and expenses. Actual results could
differ from estimates.  Data bank  amortization is determined using estimates of
ultimate  revenues from  licensing of the seismic  data.  Refer to the data bank
discussion  below  for  additional   information  on  data  bank   amortization.
Depreciation,  depletion  and  amortization  of oil and gas  properties  and the
impairment of oil and gas properties are  determined  using  estimates of proved
oil and gas  reserves.  There  are  numerous  uncertainties  in  estimating  the
quantity of proved reserves and in projecting the future rates of production and
timing of development  expenditures.  Refer to Note Q, "Supplemental Oil and Gas
Information"  for  additional  information  regarding  the process of estimating
proved oil and gas reserve quantities.

     Basis of Presentation:  The accompanying  consolidated financial statements
include  the  accounts  of  Seitel,  Inc.,  the  accounts  of  its  wholly-owned
subsidiaries  and the  Company's  pro  rata  share of its  investments  in joint
ventures.  Investments  in less than  majority  owned  companies  over which the
Company has the ability to exercise  significant  influence  are  accounted  for
using the equity method.  All material  intercompany  accounts and  transactions
have been eliminated in consolidation.  Certain reclassifications have been made
to the  amounts  in the prior  years'  financial  statements  to  conform to the
current year's presentation.

     The Company  presents its  consolidated  balance sheets on an  unclassified
basis.  Because the portion of seismic  data  acquisition  costs to be amortized
during the next year cannot be classified as a current asset, and classification
of all of these costs as noncurrent would be misleading to the reader because it
would not indicate the level of assets expected to be converted into cash in the
next year, the Company  believes that the use of an  unclassified  balance sheet
results in improved financial reporting.


     Data Bank:  Costs  incurred in the creation of  proprietary  seismic  data,
including  the direct and  incremental  costs of  Company  personnel  engaged in
project management and design, are capitalized.  Substantially all (greater than
90%) of the costs  incurred  to develop  the  Company's  data bank have been for
programs created by the Company.  The Company uses the income forecast method to
amortize  the costs of  seismic  data  programs  it  creates.  Under the  income
forecast method, seismic data costs are amortized in the proportion that revenue
for a period  relates to  management's  estimate  of  ultimate  revenues.  Since
inception, management has established guidelines regarding its annual charge for
amortization.  Under these  guidelines,  seismic  data created by the Company is
amortized in a set period of time based on historical  experience  with both the
timing  and  amount  of  revenue.  Management  estimates  that 90% of the  costs
incurred in the creation of seismic data is amortized  within five years of such
data becoming available for resale for  two-dimensional  seismic data and within
seven years of such data  becoming  available  for resale for  three-dimensional
seismic  data.  If  anticipated  sales  fall  below  the  benchmark  guidelines,
amortization is accelerated. Depending on actual sales performance, the costs of
the  Company's  seismic data are fully  amortized  within 20 years or less.  The
Company also purchases existing seismic data programs from other companies.  The
costs  of  purchased  seismic  data  programs  are  generally   amortized  on  a
straight-line basis over ten years; however, the costs of a significant purchase
(greater than 5% of the net book value of the data bank),  are  amortized  using
the  greater of the income  forecast  method or ten-year  straight-line  method.
Under these  amortization  policies,  the Company would expect the percentage of
net data bank as of December 31, 1998 to be amortized to be 13%,  15%, 16%, 14%,
12%, and 30% for the years ending December 31, 1999,

                                       F-8

<PAGE>
2000, 2001, 2002, 2003 and all periods thereafter,  respectively.  On a periodic
basis,  the carrying  value of seismic data is compared to its estimated  future
revenue and, if appropriate,  is reduced to its estimated net realizable  value.
Net data bank at December 31, 1998 and 1997 was  comprised of the  following (in
thousands):
<TABLE>
<CAPTION>
                                                                  December 31,
                                                         -------------------------------
                                                             1998               1997
                                                         ------------       ------------
<S>                                                     <C>                <C>
2D data created by the Company                          $      14,269      $      17,625
3D data created by the Company                                230,163            151,247
Data purchased by the Company                                  18,518             12,064
                                                         ------------       ------------
Net data bank                                           $     262,950      $     180,936
                                                         ============       ============
</TABLE>

     Property  and  Equipment:   The  Company  accounts  for  its  oil  and  gas
exploration and production  activities using the full-cost method of accounting.
Under this  method,  all costs  associated  with  acquisition,  exploration  and
development of oil and gas reserves are capitalized,  including directly related
overhead  costs,  and interest costs related to its  unevaluated  properties and
certain  properties under  development  which are not currently being amortized.
For the three years ended December 31, 1998, exploration and development related
overhead costs of $1,795,000, $1,431,000 and $1,146,000, respectively, have been
capitalized  to oil and gas  properties.  For the three years ended December 31,
1998,  interest costs of $2,486,000,  $2,105,000 and  $1,525,000,  respectively,
have been capitalized to oil and gas properties.

     Provisions  for  depreciation,  depletion and  amortization  are calculated
using  the  units-of-production   method.  Estimated  future  site  restoration,
dismantlement  and  abandonment  costs,  net of salvage  values,  are taken into
consideration. Such costs are not currently expected to be material. Capitalized
costs associated with the acquisition and evaluation of unproved  properties and
certain  properties under development are not currently  depleted.  Depletion of
the costs  associated with these properties will commence when the properties or
projects are evaluated.

     Capitalized  costs are  limited  to the  present  value,  discounted  at 10
percent, of future net revenues from estimated proved reserves, based on current
economic  and  operating  conditions,  plus the  lower of cost or fair  value of
unevaluated  properties,  adjusted for the effects of related  income taxes.  If
capitalized  costs  exceed  this limit,  the excess is charged to  depreciation,
depletion and amortization.  Based on the Company's  December 31, 1997 estimated
proved reserves valued at March 18, 1998 market prices,  the Company  recorded a
non-cash  impairment of oil and gas properties of $9,560,000  ($6,160,000 net of
taxes) in the fourth quarter of 1997.  No such charges were recorded in 1998.

     Depreciation  of other  property  and  equipment  is  calculated  using the
straight-line  method over the estimated  useful lives of the assets of three to
five years.

     Income Taxes: The Company and all of its  subsidiaries  file a consolidated
federal  income tax return.  The Company does not provide  deferred taxes on the
undistributed   earnings  of  its  foreign   subsidiaries,   which  amounted  to
$1,601,000,  $207,000 and $445,000 for the years ended  December 31, 1998,  1997
and  1996,  respectively,  as  such  earnings  are  intended  to be  permanently
reinvested in foreign operations.

     Income  Recognition:  Revenue  from seismic data  licensing  agreements  is
recognized when each seismic data program is available for use by the licensees,
and is presented  net of revenue  shared with other  entities.  Revenue from the
acquisition  of seismic data for  non-affiliated  parties is  recognized  on the
percentage-of-completion method based on the work effort completed compared with
the total work effort  estimated for the  contract.  These  contracts  generally
provide that the customer  accepts work  completed  throughout  the  performance
period  and owes the  Company,  based on  pricing  provisions,  amounts  for job
completion,  measured  in terms of  performance  progress.  Revenue  received in
advance of being earned is deferred until earned.

     In certain cases,  the Company grants seismic licenses to third parties for
data to be used in their  operations  (not for resale) in exchange for exclusive
ownership of seismic data from the third party. The Company  recognizes  revenue
for the licenses  granted and records a data library  asset for the seismic data
acquired. These transactions are accounted for as non-monetary exchanges and are
valued at the fair market  value of such  licenses  based on values  realized in
cash transactions to other parties for similar seismic data.

     Cost of Sales:  Cost of sales consists of expenses  associated with oil and
gas production,  seismic resale support  services and the acquisition of seismic
data  for   non-affiliated   parties  (until  August  11,  1997).  The  cost  of

                                      F-9
<PAGE>


acquiring seismic data for  non-affiliated  parties includes all direct material
and labor costs and indirect costs related to the acquisition  such as supplies,
tools, repairs and depreciation.

     Foreign Currency Translation: For subsidiaries whose functional currency is
deemed to be other  than the U. S.  dollar,  asset and  liability  accounts  are
translated at period-end  exchange rates and revenue and expenses are translated
at the  current  exchange  rates as of the dates on which  they are  recognized.
Translation  adjustments are included as a separate  component of  stockholders'
equity. Any gains or losses on transactions or monetary assets or liabilities in
currencies other than the functional  currency are included in net income in the
current period.

     Use of Derivatives:  The Company has a price risk  management  program that
utilizes  derivative  financial  instruments,  principally natural gas swaps, to
reduce the price risks associated with fluctuations in natural gas prices. These
financial  instruments are designated as hedges and accounted for on the accrual
basis with gains and losses being  recognized  based on the type of contract and
exposure being hedged.  Realized gains or losses on natural gas swaps designated
as hedges of anticipated  production are treated as deferred  credits or charges
and are included in other  liabilities or other assets on the balance sheet. Net
gains  and  losses on  natural  gas swaps  designated  as hedges of  anticipated
transactions,  including accrued gains or losses upon maturity or termination of
the contract,  are deferred and recognized in income when the associated  hedged
commodities  are produced.  In order for natural gas swaps to qualify as a hedge
of an  anticipated  transaction,  the  derivative  contract  must  identify  the
expected  date of the  transaction,  the  commodity  involved,  and the expected
quantity to be purchased or sold.  In the event that a hedged  transaction  does
not occur, future gains and losses,  including  termination gains or losses, are
included in the income  statement  when  incurred.  As of December 31, 1998, the
Company did not have any open commodity  price hedges.  The estimated fair value
of open commodity price hedges as of December 31, 1997 was a gain of $183,000.

     In the  statement  of cash flows,  cash  receipts  or  payments  related to
financial  instruments  are classified  consistent  with the cash flows from the
transaction being hedged.

     Earnings per Share:  In accordance  with Statement of Financial  Accounting
Standards  ("SFAS") No. 128,  "Earnings Per Share," basic  earnings per share is
computed based on the weighted average shares of common stock outstanding during
the  periods.  Diluted  earnings  per share is  computed  based on the  weighted
average shares of common stock plus the assumed issuance of common stock for all
potentially  dilutive  securities.  Earnings per share computations to reconcile
basic and diluted income from continuing operations for the years 1998, 1997 and
1996 consist of the following (in thousands except per share amounts):

<TABLE>
<CAPTION>
                                                                    Year Ended December 31,
                                                         -------------------------------------------
                                                            1998            1997             1996
                                                         ----------      ----------       ----------
<S>                                                     <C>             <C>              <C>
Income from continuing operations                       $    24,360     $    31,557      $    16,237
                                                         ==========      ==========       ==========
Basic weighted average shares                                22,720          21,380           19,646
Effect of dilutive securities: (1)<F1>
   Options and warrants                                         404             670              932
   Convertible subordinated debentures                            -               -               82
                                                         ----------      ----------       ----------
Diluted weighted average shares                              23,124          22,050           20,660
                                                         ==========      ==========       ==========
Per share income from continuing operations:
   Basic                                                $      1.07     $      1.48      $       .83
   Diluted                                              $      1.05     $      1.43      $       .79
- -------------------

<FN>
<F1> (1)  A weighted  average  year-to-date  number of options  and  warrants to
          purchase  187,000,  1,007,000  and 20,000  shares of common stock were
          outstanding  during 1998,  1997 and 1996,  respectively,  but were not
          included  in  the   computation  of  diluted  per  share  income  from
          continuing  operations because their exercise prices were greater than
          the average market price of the common shares.
</FN>
</TABLE>

     Stock-Based  Compensation:  The Company  accounts for employee  stock-based
compensation   using  the  intrinsic  value  method   prescribed  by  Accounting
Principles  Board  ("APB")  Opinion  No.  25,  "Accounting  for Stock  Issued to
Employees."  Reference is made to Note G, "Stock  Options and  Warrants,"  for a
summary of the pro forma  effect of SFAS No. 123,  "Accounting  for  Stock-Based
Compensation" on the Company's results of operations in 1998, 1997 and 1996.

                                      F-10


<PAGE>


     Fair Value of Financial Instruments:  SFAS No. 107, "Disclosures about Fair
Value of  Financial  Instruments,"  requires  disclosure  of the  fair  value of
certain  financial  instruments.  The  estimated  fair value  amounts  have been
determined   by  the  Company   using   available   market  data  and  valuation
methodologies. The book values of cash and equivalents, receivables and accounts
payable  approximate their fair value as of December 31, 1998 and 1997,  because
of the short-term maturity of these instruments.  Based upon the rates available
to the  Company,  the  fair  value  of the  Senior  Notes  and  the  term  loans
approximates  $65,149,000  and  $75,440,000  as of  December  31, 1998 and 1997,
respectively.  The  book  value  of the  Company's  revolving  lines  of  credit
approximates fair value due to the variable interest rates under the lines.


     Impairment  of  Long-Lived   Assets:  In  accordance  with  SFAS  No.  121,
"Accounting for Impairment of Long-Lived  Assets and for Long-Lived Assets to be
Disposed Of," the Company  reviews  long-lived  assets for  impairment  whenever
events or changes in circumstances  indicate that the carrying value of an asset
may not be realizable.  There were no impairments recorded under SFAS No. 121 in
1998, 1997 or 1996.

     Accounting  For  Sales  of  Stock  By  Subsidiary  Companies:  The  Company
recognizes  gains or losses on sales of stock by its  subsidiary  companies when
such sales are not made as part of a larger  plan of  corporate  reorganization.
Such gains or losses are based upon the difference between the book value of the
Company's  investment  in the  subsidiary  immediately  after  the  sale and the
historical book value of the Company's investment immediately prior to the sale.


     Comprehensive   Income:  In  accordance  with  SFAS  No.  130,   "Reporting
Comprehensive  Income,"  the Company has  reported  comprehensive  income in the
consolidated  statements  of  stockholders'  equity  for the three  years  ended
December 31, 1998.  Accumulated other  comprehensive  income consists of foreign
currency translation adjustments.


     Allowance for Doubtful  Accounts:  Activity in the Company's  allowance for
doubtful accounts receivable consists of the following (in thousands):
<TABLE>
<CAPTION>
                                                                                                   December 31,
                                                                                       -----------------------------------
                                                                                           1998                   1997
                                                                                       ------------           ------------
<S>                                                                                   <C>                    <C>
Balance at beginning of period                                                        $         561          $         336
   Additions to costs and expenses                                                              400                    225
   Deductions for uncollectible receivables written off and recoveries                          (25)                     -
                                                                                       ------------           ------------
Balance at end of period                                                              $         936          $         561
                                                                                       ============           ============
</TABLE>


     Recent Accounting  Pronouncements:  In June 1998, the Financial  Accounting
Standards  Board  ("FASB")  issued  SFAS No.  133,  "Accounting  for  Derivative
Instruments and Hedging  Activities." The Statement  establishes  accounting and
reporting  standards  requiring  that  every  derivative  instrument  (including
certain derivative  instruments  embedded in other contracts) be recorded in the
balance  sheet as either an asset or liability  measured at its fair value.  The
Statement  requires  that changes in the  derivative's  fair value be recognized
currently in earnings unless specific hedge accounting criteria are met. Special
accounting  for  qualifying  hedges  allows a  derivative's  gains and losses to
offset related results on the hedged item in the income statement,  and requires
that a company must formally document,  designate,  and assess the effectiveness
of transactions  that receive hedge  accounting.  Statement 133 is effective for
fiscal years beginning after June 15, 1999 and cannot be applied  retroactively.
Statement  133 must be applied to (a)  derivative  instruments  and (b)  certain
derivative instruments embedded in hybrid contracts that were issued,  acquired,
or  substantively  modified  after  December  31,  1997 (and,  at the  Company's
election, before January 1, 1998). The Company has not yet quantified the impact
of adopting Statement 133. However,  the Company anticipates that application of
the  statement  will not have a material  effect on its  consolidated  financial
statements.


NOTE B--INCOME TAXES

     The  discussion  of income  taxes  herein  does not  include the income tax
effects of the discontinued operations explained in Note M of these consolidated
financial statements.



                                      F-11



<PAGE>


     The provision  (benefit) for income taxes for each of the three years ended
December 31, 1998, are comprised of the following (in thousands):
<TABLE>
<CAPTION>
                                           1998             1997            1996
                                        ----------       ----------      ----------

  <S>                                  <C>              <C>             <C>
  Current    - Federal                 $     3,018      $     8,709     $     5,214
             - State                           165              314             246
             - Foreign                         451              142              82
                                        ----------       ----------      ----------
                                             3,634            9,165           5,542
                                        ----------       ----------      ----------

  Deferred   - Federal                       9,463            8,256           3,321
             - State                             -                1               -
             - Foreign                         526                -               -
                                        ----------       ----------      ----------
                                             9,989            8,257           3,321
                                        ----------       ----------      ----------

  Tax provision  - Federal                  12,481           16,965           8,535
                 - State                       165              315             246
                 - Foreign                     977              142              82
                                        ----------       ----------      ----------
                                       $    13,623      $    17,422     $     8,863
                                        ==========       ==========      ==========
</TABLE>

     The  differences  between the U.S.  Federal  income  taxes  computed at the
statutory rate (35% for 1998, 35% for 1997 and 34.7% for 1996) and the Company's
income taxes for financial reporting purposes are as follows (in thousands):
<TABLE>
<CAPTION>
                                                    1998             1997          1996
                                                  -------          -------       -------
<S>                                              <C>              <C>           <C>
 Statutory Federal income tax                    $ 13,294         $ 17,143      $  8,716
 State income tax, less Federal benefit               107              206           162
 Other, net                                           222               73           (15)
                                                  -------          -------       -------
 Income tax expense                              $ 13,623         $ 17,422      $  8,863
                                                  =======          =======       =======
</TABLE>

     The  components of the net deferred  income tax liability  reflected in the
Company's  consolidated  balance  sheets at  December  31, 1998 and 1997 were as
follows (in thousands):
<TABLE>
<CAPTION>
                                                                           Deferred Tax Assets
                                                                     (Liabilities) at December 31,
                                                                  -----------------------------------
                                                                      1998                    1997
                                                                  ----------               ----------
<S>                                                              <C>                      <C>
Alternative minimum tax credit carryforward                      $     4,324              $     3,541
Partnership earnings                                                     945                      499
Investment tax credits                                                    44                       44
Other                                                                  1,407                    1,021
                                                                  ----------               ----------
Total deferred tax assets                                              6,720                    5,105
Less:  Valuation allowance                                               (44)                     (44)
                                                                  ----------               ----------
  Deferred tax assets, net of
  valuation allowance                                                  6,676                    5,061
                                                                  ----------               ----------
Depreciation, depletion and amortization                             (30,615)                 (20,617)
Financial gain on sale of subsidiary stock                            (2,934)                  (2,494)
Other                                                                 (1,166)                       -
                                                                  ----------               ----------
Total deferred tax liabilities                                       (34,715)                 (23,111)
                                                                  ----------               ----------
Net deferred tax liability                                       $   (28,039)             $   (18,050)
                                                                  ==========               ==========
</TABLE>

     As of December 31, 1998, the Company has an  alternative  minimum tax (AMT)
credit  carryforward  of  approximately  $4,324,000  which can be used to offset
regular  Federal  income taxes  payable in future  years.  The AMT credit has an
indefinite carryforward period.

                                      F-12
<PAGE>

         In  connection  with the exercise of  non-qualified  stock  options and
common stock  purchase  warrants by employees  during 1998,  1997 and 1996,  the
Company received $344,000,  $5,657,000 and $3,204,000,  respectively, in Federal
income tax savings which has been  reflected as a credit to  additional  paid-in
capital.

NOTE C--DEBT

     The following is a summary of the  Company's  debt at December 31, 1998 and
1997 (in thousands):
<TABLE>
<CAPTION>
                                                   December 31,
                                            ---------------------------
                                               1998              1997
                                            ----------        ---------
<S>                                        <C>               <C>
Senior notes                               $    65,000       $   75,000
Borrowings under lines of credit                85,500           15,000
Term loans                                         172              477
                                            ----------        ---------
                                           $   150,672       $   90,477
                                            ==========        =========
</TABLE>
     Senior  Notes:  On  December  28,  1995,  the  Company  completed a private
placement of three series of unsecured  Senior Notes  totaling $75 million.  The
Company  contemporaneously  issued its Series A Notes and Series B Notes,  which
total $52.5  million and bear  interest at the fixed rate of 7.17%.  On April 9,
1996, the Company issued its Series C Notes,  which total $22.5 million and bear
interest at a fixed rate of 7.48%.  The Series A Notes  mature on  December  30,
2001, and require annual principal  payments of $8.3 million beginning  December
30,  1999.  The Series B and Series C Notes  mature on December  30,  2002,  and
require  combined  annual  principal  payments  of $10  million  which  began on
December 30, 1998. Interest on the Senior Notes is payable semi-annually on June
30 and December 30.

     Lines of Credit: The Company has a $75 million unsecured  revolving line of
credit facility that matures on March 16, 2001. The facility bears interest at a
rate determined by the ratio of the Company's debt to cash flow from operations.
Pursuant to the interest rate pricing structure, funds can currently be borrowed
at LIBOR plus 3/4%, the bank's  prevailing prime rate, or the sum of the Federal
Funds  effective  rate for such day plus 1/2%.  At  December  31, 1998 and 1997,
$66.5 million and $15 million,  respectively,  was  outstanding  on this line of
credit at an average interest rate of 6.33% and 6.69%, respectively.

     On December 11,  1998,  the Company  entered  into an  agreement  for a $25
million  unsecured  revolving  line of credit that matures on December 11, 1999.
The facility bears  interest at a rate  determined by the ratio of the Company's
debt to cash flow from  operations.  The interest rate pricing  structure is the
same as in the Company's $75 million line of credit.  At December 31, 1998,  $19
million was  outstanding  on this line of credit at an average  interest rate of
6.41%. Subsequent to December 31, 1998, the Company paid all amounts outstanding
under its $25  million  line of credit  and on  February  12,  1999 the  Company
cancelled its $25 million line of credit.

     Term  Loans:  In  1997,  two of  the  Company's  wholly-owned  subsidiaries
obtained two separate  three-year term loans totaling  $361,000.  The loans bear
interest at the rate of 7.9%. The proceeds were used for the purchase of certain
property and equipment  which secures the debt.  Monthly  principal and interest
payments total approximately $11,000.

     Certain of the borrowings  described  above contain  requirements as to the
maintenance  of minimum net worth and  limitations  on liens,  total debt,  debt
issuance  and  disposition  of assets.  The Company was in  compliance  with the
financial convenants at December 31, 1998.

     Aggregate  maturities of the Company's debt over the next four years are as
follows:  $37,461,000  in 1999;  $18,378,000  in 2000;  $84,833,000  in 2001 and
$10,000,000 in 2002.

NOTE D--LEASE OBLIGATIONS

     Assets recorded under capital leases  obligations of $17,000 and $81,000 at
December  31,  1998  and  1997,  respectively,  are  included  in  property  and
equipment.




                                      F-13



<PAGE>


     The Company leases office space under operating leases.  Rental expense for
1998,  1997  and  1996  was  approximately  $757,000,   $606,000  and  $619,000,
respectively.

     Future minimum lease payments for the five years subsequent to December 31,
1998 and in the aggregate are as follows (in thousands):
<TABLE>
<CAPTION>
                                                   Capital        Operating
                                                   Leases           Leases
                                                 -----------     -----------
     <S>                                        <C>             <C>
     1999                                       $         19    $        780
     2000                                                  -             740
     2001                                                  -             524
     2002                                                  -             265
     2003                                                  -               -
                                                 -----------     -----------
     Total minimum lease payments                         19    $      2,309
                                                                 ===========
     Less amount representing interest                    (1)
                                                 -----------
     Present value of net minimum
        lease payments                          $         18
                                                 ===========
</TABLE>

NOTE E--VOLUMETRIC PRODUCTION PAYMENT

     In June 1996,  the Company  sold a  volumetric  production  payment for $19
million  to  certain  limited  partnerships.  Under the terms of the  production
payment  agreements,  the  Company  conveyed  a  mineral  property  interest  of
approximately  7.6 billion cubic feet of certain  natural gas and  approximately
363,000 barrels of other  hydrocarbons to the purchasers.  The Company  retained
responsibility  for its working  interest share of the cost of  operations.  The
Company  accounted  for the  proceeds  received in the  transaction  as deferred
revenue  which was  amortized  into  revenue and income as natural gas and other
hydrocarbons were produced and delivered.

     The Company  entered into an agreement to extinguish the remaining  portion
of its volumetric  production payment which was effective July 1, 1997. The cost
to acquire the production payment liability exceeded its book value. As a result
of this  transaction,  the Company  recorded a pre-tax loss of $4,133,000 in the
accompanying  consolidated  statement of operations  for the year ended December
31, 1997.

NOTE F--CONTINGENCIES AND COMMITMENTS

     At both December 31, 1998 and 1997, $274,000 of charges for seismic surveys
which are payable to joint venture  partners  only from the  collection of sales
proceeds from those seismic surveys are included in contingent payables.

     The Company has employment agreements with certain of its key employees and
other incentive compensation arrangements that commit it to commissions based on
revenue,  bonuses based on pre-tax  profits,  and other amounts based on seismic
data program profitability.  Part III of the Company's Form 10-K contains a more
complete discussion of these contractual obligations.

     The Company  guarantees  borrowings  up to $750,000  made by its  president
under a line of credit.  The Company is only  obligated  to make  payment in the
event of default by its president. The Company has a contractual right of offset
against any salary,  bonus,  commission or other amounts due from the Company to
its president for any amounts paid by the Company pursuant to this guaranty.  At
December  31,  1998,  $600,000  was  outstanding  on this line of credit,  which
represented the maximum amount  outstanding on this line of credit for the year.
The Company did not make any payments under this guaranty during 1998.

NOTE G--STOCK OPTIONS AND WARRANTS

     The Company  presently  maintains  four stock  option plans under which the
Company's  officers,  directors and employees may be granted options or warrants
to purchase the  Company's  common  stock.  The exercise  price,  term and other
conditions  applicable  to each option  granted  under the  Company's  plans are
generally determined by the Compensation  Committee at the time of grant and may
vary with each option granted.  All options issued under the Company's plans are
issued at or above the market price of the Company's common stock as of the date
of  issuance,  have a term of no more  than ten  years  and vest  under  varying
schedules in accordance with the terms of the respective option agreements.

                                      F-14
<PAGE>

     On December 3, 1998, the Company's Board of Directors  approved a repricing
of the Company's then outstanding  options whereby all options and warrants held
by  employees  with an exercise  price  greater than $13.94 ($2 above the market
price of the Company's common stock) were repriced to $13.94.


     The following  summarizes  information  with regard to the stock option and
warrant  plans for the years ended  December 31, 1998,  1997 and 1996 (shares in
thousands):
<TABLE>
<CAPTION>
                                                     1998                       1997                      1996
                                           -----------------------   -----------------------   -----------------------
                                                         Weighted                  Weighted                  Weighted
                                                          Average                   Average                   Average
                                                         Exercise                  Exercise                  Exercise
                                            Shares         Price      Shares         Price      Shares         Price
                                           --------      ---------   --------      ---------   --------      ---------
<S>                                           <C>       <C>             <C>       <C>             <C>       <C>
Outstanding at beginning of year              5,659     $    16.33      4,758     $    11.50      4,860     $     9.96
     Granted                                  5,015          13.75      3,444          20.18      1,137          16.30
     Exercised                                 (102)          9.74     (1,809)          9.26     (1,145)          9.63
     Cancelled                               (3,804)         19.00       (734)         20.53        (94)         12.55
                                           --------                  --------                  --------
Outstanding at end of year                    6,768          12.99      5,659          16.33      4,758          11.50
                                           ========                  ========                  ========

Options exercisable at end of year            5,363                     4,147                     4,125
                                           ========                  ========                  ========
Available for grant at end of year            1,170                     1,256                     2,849
                                           ========                  ========                  ========
</TABLE>


     The following  table  summarizes  information  for the options and warrants
outstanding at December 31, 1998 (shares in thousands):
<TABLE>
<CAPTION>
                                              Options Outstanding                      Options Exercisable
                                ---------------------------------------------   -----------------------------
                                  Number of       Weighted         Weighted       Number of          Weighted
                                   Options         Average          Average        Options            Average
                                 Outstanding     Contractual       Exercise      Exercisable         Exercise
Range of Exercise Prices         at 12/31/98    Life in Years        Price       at 12/31/98           Price
- ------------------------        -------------   -------------     -----------   -------------       ---------
<S>          <C>                        <C>          <C>         <C>                    <C>        <C>
$  2.69  -   $ 11.94                    1,387        4.07        $       9.58           1,293      $     9.41
$ 12.00  -   $ 13.56                    1,386        3.86               12.37           1,295           12.35
$ 13.75  -   $ 13.75                       36        5.96               13.75               -               -
$ 13.94  -   $ 13.94                    3,772        4.61               13.94           2,610           13.94
$ 20.34  -   $ 25.31                      187        6.02               23.49             165           23.38
                                -------------                                   -------------
$  2.69  -   $ 25.31                    6,768                           12.99           5,363           12.75
                                =============                                   =============
</TABLE>

     The Company  applies APB  Opinion  No. 25 and  related  interpretations  in
accounting for its stock-based  compensation plans. APB Opinion No. 25 generally
does not  require  compensation  costs to be  recorded  on  options  which  have
exercise  prices at least equal to the market  price of the stock on the date of
grant.  Accordingly,  no compensation cost has been recognized for the Company's
stock-based   plans.  Had  compensation  cost  for  the  Company's   stock-based
compensation  plans been  determined  based on the fair value at the grant dates
for awards  under those plans  consistent  with the optional  accounting  method
prescribed  by SFAS No. 123,  "Accounting  for  Stock-Based  Compensation,"  the
Company's  net income and  earnings per share would have been reduced to the pro
forma amounts indicated below (in thousands, except per share data):
<TABLE>
<CAPTION>
                                                          1998              1997             1996
                                                        ---------        ---------        ---------

<S>                                                    <C>              <C>              <C>
Net income                              As reported    $   24,360       $   31,557       $   15,249
                                          Pro forma    $   15,159       $   17,039       $   10,050

Basic earnings per share                As reported    $     1.07       $     1.48       $      .78
                                          Pro forma    $      .67       $      .80       $      .51

Diluted earnings per share              As reported    $     1.05       $     1.43       $      .74
                                          Pro forma    $      .66       $      .78       $      .49
</TABLE>


                                      F-15
<PAGE>

     The fair  value of each  option  grant was  estimated  on the date of grant
using the Black-Scholes  option-pricing model with the following assumptions for
1998,  1997 and 1996,  respectively:  (1) risk-free  interest rates ranging from
4.44% to 5.03%,  5.79% to 6.79% and 5.9% to 7.03%;  (2) dividend yield of 0%, 0%
and 0%; (3) stock price  volatility  ranging  from  44.34% to 57.10%,  37.23% to
45.77% and 46.49% to 62.62%,  and (4) expected  option lives ranging from .42 to
10 years, 1.67 to 10 years and 5 to 10 years. The weighted-average fair value of
options  granted  during  1998,  1997 and 1996 was $11.94,  $9.98 and $11.20 per
option,  respectively,  for options  granted at fair market value and $13.75 and
$10.15 per option for options  granted above fair market value in 1998 and 1997,
respectively.  The pro forma  amounts shown above may not be  representative  of
future  results  because  the SFAS No.  123  method of  accounting  has not been
applied to options granted prior to January 1, 1995.


     On July 25, 1996, the Company's Board of Directors adopted the Non-Employee
Directors' Deferred  Compensation Plan which permits each non-employee  director
to elect to receive  annual  director  fees in the form of stock  options and to
defer  receipt of any  directors  fees in a deferred cash account or as deferred
shares.  As of December 31, 1998,  60,000 shares have been reserved for issuance
under this plan and directors have  accumulated  1,643 deferred  shares in their
accounts of which 328 shares have been distributed and 1,315 will be distributed
in annual equal installments from January 1999 to January 2002.

NOTE H--COMMON STOCK

     On November 20, 1997, the  shareholders of the Company approved an increase
in the Company's  authorized  common stock to 50,000,000  shares to facilitate a
two-for-one  stock split,  effected in the form of a 100% stock dividend,  which
was approved by the Board of Directors on October 7, 1997. The two-for-one stock
split was paid in the form of a stock dividend to  shareholders  of record as of
December  3,  1997.  All  numbers  of  shares  and  per  share  amounts  in  the
accompanying  consolidated financial statements and footnotes have been restated
to give effect to the two-for-one stock split except where noted.

     In December 1997, the Company's Board of Directors approved the expenditure
of up to $25 million to repurchase  the Company's  common stock.  As of December
31, 1998, the Company has  repurchased  175,000 shares of common stock at a cost
of $2,973,000 under this plan.

     The Company may offer from time to time in one or more series (i) unsecured
debt securities, which may be senior or subordinated,  (ii) preferred stock, par
value $0.01 per share,  and (iii) common stock, par value $.01 per share, or any
combination of the foregoing,  up to an aggregate of $41,041,600  pursuant to an
effective  shelf  registration  statement filed with the Securities and Exchange
Commission.

     On July 21, 1992, the Company granted ten-year loans at an interest rate of
4% to most of its employees for the purchase of 800,000  shares of the Company's
common stock at the then market  price of $2.69 per share.  Payment of 5% of the
original principal balance plus accrued interest are due annually August 1, with
a balloon payment of the remaining principal and interest due August 1, 2002. On
October 2, 1998, the Company  granted  five-year loans at an interest rate of 4%
to most of its  employees  for the purchase of 794,300  shares of the  Company's
common stock at the then market price of $10.31 per share. Payment of 60% of the
loan amount plus accrued  interest is being made in equal monthly,  quarterly or
annual  payments,  as applicable,  and a balloon payment of the remaining 40% is
due on October 2, 2003. The Company recorded related compensation expense due to
the below market  interest  rate on these loans of $54,000,  $43,000 and $48,000
for the years ended December 31, 1998, 1997 and 1996, respectively. During 1998,
1997 and 1996, the Company received $649,000, $96,000 and $190,000 respectively,
as principal  payments on these notes.  The stock  certificates  are held by the
Company as collateral until payment is received.

NOTE I--PREFERRED STOCK

     The Company is authorized by its Amended  Certificate of  Incorporation  to
issue  5,000,000  shares of  preferred  stock,  the terms and  conditions  to be
determined by the Board of Directors in creating any  particular  series.  As of
December 31, 1998, no preferred stock had been issued.






                                      F-16


<PAGE>



NOTE J--INVESTMENT IN EAGLE GEOPHYSICAL, INC.

     On August 11, 1997,  the Company's  wholly-owned  seismic data  acquisition
crew subsidiary, Eagle Geophysical, Inc. ("Eagle"),  completed an initial public
offering  ("Offering")  in which the Company  sold  1,880,000  of its  3,400,000
shares of Eagle common stock as a selling stockholder.  The Company received net
proceeds of $29,723,000 from its  participation in the Offering,  resulting in a
pre-tax gain,  net of costs of  $18,449,000 on the sale of Eagle common stock in
1997.  Additionally,  the  Company  recorded a pre-tax  gain,  net of costs,  of
$10,750,000 in 1997 representing an increase in the Company's  underlying equity
of  Eagle as a result  of  Eagle's  issuance  of  stock in  connection  with the
Offering.

     In 1998,  Eagle  issued stock in  connection  with two  acquisitions  which
caused  the  Company  to record a pre-tax  loss of  $193,000  for the year ended
December 31, 1998.


     As a result of the Offering, the Company now owns 1,520,000 shares of Eagle
common  stock or 17.3% of the  outstanding  shares of Eagle,  at a book value of
$15,544,000  or $10.23 per share.  The Company  accounts for its  investment  in
Eagle using the equity method whereby such  investment is based on the Company's
historical  cost plus the Company's  share of (i) Eagle  earnings and losses and
(ii) Eagle's  equity as a result of issuances of stock.  In accordance  with the
accounting literature, an investment in a company accounted for under the equity
method is carried on such basis  rather than based on the fair  market  value of
the stock  unless an "other than  temporary"  decline in the market value of the
stock has occurred.  Once an "other than temporary"  decline in the market value
of the stock  occurs,  an  impairment  in the carrying  value of the  investment
should be recorded. An "other than temporary" decline is deemed to have occurred
if the fair market value is  depressed  for a period of more than nine to twelve
months.  Eagle's stock has been trading at a price below the Company's  carrying
value since August 1998. If the weakness in commodity prices continues,  and, in
turn the oilfield service sector market values remain depressed, the Company may
be required to record a non-cash,  non-operating  charge for  impairment  in the
carrying value of its investment in Eagle during 1999. At December 31, 1998, the
fair market value of the Company's  investment in Eagle was $5,890,000 or $3.875
per share as quoted by NASDAQ.

NOTE K--RELATED PARTY TRANSACTIONS

     The Company owed Eagle and its subsidiaries  $27,117,000 and $12,500,000 at
December 31, 1998 and 1997, respectively,  for seismic data acquisition services
provided to the Company and its  subsidiaries  subsequent to the Offering  date.
The Company  incurred  charges of $79,900,000 and $22,200,000 for these services
for the year ended December 31, 1998 and from the period August 11, 1997 through
December 31, 1997,  respectively.  Costs incurred from these services were based
on agreed upon  contractual  amounts and terms  similar to contracts  with third
party contractors.

     The Company and Eagle  entered  into a Master  Separation  Agreement  ("the
Agreement") for the purpose of defining their continuing  relationship after the
Offering.  The  Agreement  provided  for the  Company  and Eagle to enter into a
Sublease, a Registration Rights Agreement and a Tax Indemnity  Agreement.  Under
the Agreement, the Company and Eagle have indemnified each other with respect to
liabilities  arising  in  connection  with the  operations  of their  respective
businesses prior to and after the date of consummation of the Offering including
liabilities  under the  Securities  Act with respect to the Offering.  Under the
Sublease  Agreement,  the Company subleased a portion of its principal corporate
offices to Eagle and allowed Eagle to utilize  certain  shared office  equipment
from August 1997 until September 1998. The Company  received $88,000 and $47,000
for this sublease for the year ended  December 31, 1998 and from the period from
August 11,  1997  through  December  31,  1997,  respectively.  Pursuant  to the
Registration  Rights  Agreement,  Eagle  registered  the  offer  and sale by the
Company  on a delayed  and  continuous  basis from time to time of the shares of
common  stock owned by the Company  after the  Offering at the expense of Eagle.
Pursuant  to the Tax  Indemnity  Agreement,  Eagle paid the Company its share of
federal income taxes prior to the date of consummation  of the Offering,  and is
responsible  for federal  income taxes from its operations on and after the date
of the Offering. Any subsequent refunds,  additional taxes or penalties or other
adjustments  relating to Eagle's  federal  income taxes for periods prior to the
date of  consummation of the Offering shall be for the benefit of or be borne by
the Company. Similar provisions apply under the Tax Indemnity Agreement to other
taxes, such as state and local taxes.

     The Company owed Helm  Resources,  Inc. and its  subsidiaries  ("Helm"),  a
company  that has three  executive  officers  who are  directors of the Company,
$2,000 and $76,000 as of December 31, 1998 and 1997,



                                      F-17



<PAGE>


respectively,  for sales of seismic  data they  jointly  own and for general and
administrative  expenses  paid by Helm on behalf  of the  Company.  The  Company
incurred  charges  of  $99,000,  $76,000  and  $80,000,  for these  general  and
administrative  expenses  during 1998, 1997 and 1996,  respectively.  Management
believes that these expenses,  which were specifically  related to the Company's
business, represented costs which would have been incurred in similar amounts by
the Company if such  services that were  performed by Helm were  performed by an
unaffiliated entity.


     Certain  employees  and  directors  of  the  Company  contributed  cash  to
partnerships  in  1994  through  1997  which  invested  in the  exploration  and
development of oil and gas properties on a working interest basis along with DDD
Energy,  Inc. ("DDD Energy").  Each  partnership's  working interest amounted to
2.5% of the total  investment  made by such  partnership  and DDD Energy for the
partnership formed in 1997, 3% for the partnership formed in 1996 and 5% for the
partnerships  formed in 1995 and 1994. On October 1, 1998, DDD Energy  purchased
the oil and gas  interests  owned by each of the  partnerships  in exchange  for
355,733 shares of the Company's common stock, payment of $824,000 and assumption
of each partnership's liabilities totaling $1,555,000.


NOTE L--MAJOR CUSTOMERS

     No customers  accounted for 10% or more of revenues  during the years 1998,
1997 or 1996.

     The Company extends credit to various companies in the oil and gas industry
for the purchase of their seismic  data,  which  results in a  concentration  of
credit  risk.  This  concentration  of credit risk may be affected by changes in
economic or other  conditions and may accordingly  impact the Company's  overall
credit  risk.  However,  management  believes  that the risk is mitigated by the
number,  size,  reputation and diversified nature of the companies to which they
extend credit.  Historical  credit losses incurred on receivables by the Company
have been immaterial.

NOTE M--DISCONTINUED OPERATIONS

     On March 22, 1996, the Company's Board of Directors  unanimously  adopted a
plan  of  disposal  to  discontinue  the  Company's  gas  marketing  operations.
Accordingly,  the Company's  consolidated  financial  statements present the gas
marketing  operations  as  discontinued  operations  for all periods  presented.
Effective  August  1,  1996,  the  Company  assigned  substantially  all  of its
contracts to purchase and supply natural gas to a retail energy marketer.

     The loss from  discontinued  operations  amounted to $988,000  for the year
ended December 31, 1996,  net of an income tax benefit of $580,000.  At December
31, 1995, the Company had fixed price gas sales  contracts  which were generally
below the estimated  market price at which the Company could purchase gas supply
and transportation. Then current market pricing models were used to estimate the
market price at which the Company could  purchase gas supply and  transportation
in the future.  Such models  were used to  estimate  the loss  related to future
contractual  commitments at December 31, 1995.  During the first seven months of
1996,  the Company  continued  to deliver gas to  customers  under its  existing
contracts.  Effective August 1, 1996, the gas marketing operations were disposed
of.  As a result  of  changes  in  market  prices to  purchase  gas  supply,  an
additional  $988,000 was  recognized as a loss from  discontinued  operations in
1996.  Such  loss  represented  the final  charge  related  to the  discontinued
operations.  No assets or liabilities  relating to the  discontinued  operations
remained at December 31, 1998.

NOTE N--STATEMENT OF CASH FLOW INFORMATION

     For purposes of the  statement  of cash flows,  the Company  considers  all
highly liquid  investments or debt instruments  with original  maturity of three
months or less to be cash equivalents.

     Operating cash flows reported in the consolidated  statements of cash flows
do not  reflect  effects of changes in  inventory  levels  because  the  Company
reports no inventories  and classifies  cash  expenditures  for its seismic data
library as an investing, rather than an operating, activity.






                                      F-18


<PAGE>



     Significant non-cash investing and financing activities are as follows:

     1.   During 1998,  the Company  issued  355,733  shares of its common stock
          valued at  $3,914,000  to acquire  interests  in  certain  oil and gas
          properties and assumed liabilities totaling $1,555,000.


     2.   During 1998,  the Company issued 794,300 shares of its common stock to
          its  officers  and  employees  in  exchange  for notes  receivable  of
          $8,191,000.

     3.   During 1996,  the Company issued  428,608,  shares of its common stock
          upon the conversion and exchange of $1,989,000,  of its 9% convertible
          subordinated  debentures.  In connection  with these  conversions  and
          exchanges,  unamortized  bond issue costs totaling  $109,000 have been
          charged to additional paid-in capital.

     4.   During 1996,  the Company issued 264,150 shares of its common stock in
          exchange for a 50% equity interest in a marine seismic company.

     5.   During 1996, the Company  redeemed a portion of its equity interest in
          a marine seismic company in exchange for a note totaling $2,680,000.

     6.   During 1997 and 1996, capital lease obligations  totaling $374,000 and
          $41,000,  respectively,  were incurred  when the Company  entered into
          leases for property and equipment.


NOTE O--INDUSTRY SEGMENTS

     The  Company  adopted  SFAS No.  131,  "Disclosures  about  Segments  of an
Enterprise  and Related  Information"  in 1998 which changes the way the Company
reports information about its operating  segments.  The information for 1997 and
1996 has been restated from the prior year's presentation in order to conform to
the current year's presentation.


     The Company  operates in two reportable  segments - seismic and exploration
and  production.  In 1997 and 1996,  the  Company  had an  additional  reporting
segment - geophysical  services.  The long-term financial performance of each of
the  reportable  segments  is  affected  by  similar  economic  conditions.  The
accounting  policies of the segments are the same as those described in Footnote
A to these consolidated  financial statements.  Intersegment sales are accounted
for at prices  comparable to those  received from  unaffiliated  customers.  The
Company  evaluates  performance  of each  reportable  segment based on operating
income (loss) before  selling,  general and  administrative  expenses,  interest
income and expense, income taxes, non-recurring items and accounting changes.

     Financial  information  by  reportable  segment  for the three  years ended
December 31, 1998, was as follows (in thousands):

<TABLE>
<CAPTION>
                                                                   Exploration
                                                                       and                    Total
                                             Seismic                Production               Segments
                                           -----------             ------------            ------------
<S>                                       <C>                     <C>                     <C>
1998
Revenue from external purchasers          $    125,863            $      18,994           $     144,857
Depreciation, depletion
  and amortization                              57,117                   11,872                  68,989
Cost of sales                                      191                    4,683                   4,874
Segment operating income                        68,555                    2,439                  70,994
Assets                                         317,292                  156,623                 473,915
Capital expenditures (a)<F1>                   139,167                   48,173                 187,340

<FN>
<F1> (a) Includes other ancillary equipment.
</FN>

</TABLE>




                                      F-19
<PAGE>
<TABLE>
<CAPTION>
                                                                 Exploration
                                                                     and            Geophysical           Total
                                               Seismic           Production          Services            Segments
                                             -----------         -----------        -----------        ------------
<S>                                         <C>                 <C>                <C>                <C>
1997
Revenue from external purchasers            $     85,560        $     25,680       $     16,316       $     127,556
Intersegment revenue                                   -                   -             18,456              18,456
Depreciation, depletion and
  amortization                                    35,163              12,666                983              48,812
Impairment of oil and gas
  properties                                           -               9,560                  -               9,560
Cost of sales                                        394               5,168             26,855              32,417
Segment operating income (loss)                   50,003              (1,714)             6,934              55,223
Assets                                           219,288             122,930                  -             342,218
Capital expenditures (a)<F1>                      89,472              64,418              8,478             162,368


1996
Revenue from external purchasers            $     67,138        $     18,255       $     20,609       $     106,002
Intersegment revenue                                   -                   -             27,217              27,217
Depreciation, depletion
  and amortization                                30,477               7,212                951              38,640
Cost of sales                                        448               3,134             42,278              45,860
Segment operating income                          36,213               7,909              4,597              48,719
Assets                                           164,547              93,565             24,810             282,922
Capital expenditures (a)<F1>                      52,217              51,428              7,669             111,314

<FN>
<F1> (a) Includes other ancillary equipment.
</FN>

</TABLE>



     The following geographic information for the three years ended December 31,
1998 pertains to the Company's seismic segment (in thousands):
<TABLE>
<CAPTION>
                                                                                                Other
                                                        United                                 Foreign
                                                        States             Canada             Countries             Total
                                                      -----------        -----------         -----------         -----------

<S>                                                  <C>                <C>                 <C>                 <C>
1998
Revenue from external customers                      $    117,623       $      7,370        $        870        $    125,863
Assets                                                    301,704             13,797               1,791             317,292

1997
Revenue from external customers                      $     82,228       $      2,748        $        584        $     85,560
Assets                                                    215,273              1,986               2,029             219,288

1996
Revenue from external customers                      $     64,508       $      1,502        $      1,128        $     67,138
Assets                                                    160,566              1,899               2,082             164,547
</TABLE>

     All  exploration  and  production  activities  are  conducted in the United
States.












                                      F-20



<PAGE>



     The following table reconciles segment information to consolidated  totals:
(in thousands)
<TABLE>
<CAPTION>
                                                                                     December 31,
                                                               --------------------------------------------------------
                                                                  1998                   1997                  1996
                                                               -----------           -----------           ------------

<S>                                                           <C>                   <C>                   <C>
Revenue:
   Revenue from external purchasers                           $    144,857          $    127,556          $     106,002
   Intersegment revenue                                                  -                18,456                 27,217
   Intercompany eliminations                                             -               (18,456)               (27,217)
                                                               -----------           -----------           ------------
     Total consolidated revenue                               $    144,857          $    127,556          $     106,002
                                                               ===========           ===========           ============

Depreciation, depletion and amortization:
   Total reportable segment depreciation,
     depletion and amortization                               $     68,989          $     48,812          $      38,640
   Corporate and other                                                 901                   867                    609
                                                               -----------           -----------           ------------
     Total consolidated depreciation,
       depletion and amortization                             $     69,890          $     49,679          $      39,249
                                                               ===========           ===========           ============

Cost of Sales:
   Total reportable segment cost of sales                     $      4,874          $     32,417          $      45,860
   Intercompany eliminations                                             -               (14,464)               (26,458)
                                                               -----------           -----------           ------------
     Total consolidated cost of sales                         $      4,874          $     17,953          $      19,402
                                                               ===========           ===========           ============

Income from continuing operations
   before income taxes:
     Total reportable segment operating
       income                                                 $     70,994          $     55,223          $      48,719
     Selling general and
       administrative expense                                      (26,599)              (23,043)               (19,165)
     Interest expense, net                                          (5,540)               (3,554)                (2,900)
     Equity in earnings (loss) of affiliate                            222                   146                   (186)
     Gain on sale of subsidiary stock                                    -                18,449                      -
     Increase (decrease) in underlying
       equity of affiliate                                            (193)               10,750                      -
     Extinguishment of volumetric
       production payment                                                -                (4,133)                     -
     Eliminations and other                                           (901)               (4,859)                (1,368)
                                                               -----------           -----------           ------------
       Income from continuing operations
         before income taxes                                  $     37,983          $     48,979          $      25,100
                                                               ===========           ===========           ============

Assets:
   Total reportable segment assets                            $    473,915          $    342,218          $     282,922
   Corporate and other                                              21,852                23,464                 11,757
                                                               -----------           -----------           ------------
     Total consolidated assets                                $    495,767          $    365,682          $     294,679
                                                               ===========           ===========           ============
</TABLE>

















                                      F-21



<PAGE>


NOTE P--QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

     The following is a summary of the unaudited quarterly results of operations
for the years ended December 31, 1998 and 1997.
<TABLE>
<CAPTION>
                                                                                    Quarter Ended
                                                               ---------------------------------------------------------
(In thousands, except per share amounts)                       March 31         June 30        Sept. 30        Dec. 31
                                                               ---------       ---------      ----------      ----------
<S>                                                           <C>             <C>            <C>             <C>
1998
Revenue                                                       $   30,927      $   36,976     $    38,332     $    38,622
Gross profit(1)<F1>                                               14,851          18,123          17,825          20,195
Provision for income taxes                                         2,873           3,741           3,693           3,316
Net income                                                         4,865           6,369           6,288           6,838
Earnings per share: (2)<F2>
   Basic                                                             .22             .28             .28             .29
   Diluted                                                           .21             .28             .28             .29

1997
Revenue                                                       $   27,219      $   34,673     $    30,793     $    34,871
Gross profit(1)<F1>                                               12,682          16,338          15,166           6,000
Provision for income taxes                                         2,228           3,040          12,002             152
Net income                                                         4,084           5,404          21,696             373
Earnings per share: (2)<F2>
   Basic                                                             .20             .26            1.00             .02
   Diluted                                                           .19             .25             .98             .02
<FN>

<F1> (1)  Gross profit represents revenue less data bank amortization, depletion
          of oil and gas  properties,  impairment of oil and gas  properties and
          cost of sales.

<F2> (2)  The sum of the individual  quarterly  earnings per share may not agree
          with the year to date earnings per share as each period's  computation
          is based on the weighted  average number of common shares  outstanding
          during the period.
</FN>
</TABLE>

NOTE Q--SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED)

     The following  information  concerning the Company's oil and gas operations
is  presented in  accordance  with SFAS No. 69,  "Disclosures  about Oil and Gas
Producing Activities."

     Oil and Gas Reserves:  Proved reserves  represent  estimated  quantities of
crude oil,  condensate,  natural gas and natural gas liquids that geological and
engineering data demonstrate,  with reasonable  certainty,  to be recoverable in
future  years from known  reservoirs  under  economic and  operating  conditions
existing at the time the  estimates  were made.  Proved  developed  reserves are
proved  reserves  expected to be recovered  through wells and equipment in place
and under operating methods being utilized at the time the estimates were made.
















                                      F-22



<PAGE>


     The  following  table sets forth  estimates  of proved  reserves and proved
developed  reserves of crude oil (including  condensate and natural gas liquids)
and  natural  gas  attributable  to  the  Company's  interest  in  oil  and  gas
properties.  The  reserve  estimates  presented  herein  were  prepared  by  the
independent petroleum engineering firms of Forrest A. Garb & Associates, Inc. at
December 31, 1998, Miller and Lents, Ltd. and Forrest A. Garb & Associates, Inc.
at December 31, 1997 and Miller and Lents,  Ltd. at December 31, 1996. It should
be noted that  these  reserve  quantities  are  estimates  and may be subject to
substantial  upward or downward  revisions.  The estimates are based on the most
current and reliable  information  available;  however,  additional  information
obtained through future production and experience and additional  development of
existing  reservoirs  may  significantly  alter  previous  estimates  of  proved
reserves.

<TABLE>
<CAPTION>
                                                                   Oil            Gas
                                                                  (Mbbl)         (MMcf)
                                                               ------------   ------------
<S>                                                                   <C>          <C>
Proved reserves at December 31, 1995                                  1,512         14,011
   Revisions of previous estimates                                      249          1,966
   Purchases of reserves in place                                        68          7,896
   Extensions and discoveries                                         1,107         10,322
   Sale of volumetric production payment                               (363)        (7,626)
   Production                                                          (279)        (2,808)
                                                               ------------   ------------
Proved reserves at December 31, 1996                                  2,294         23,761
   Revisions of previous estimates                                     (500)        (3,863)
   Repurchase of volumetric production payment                           98          3,736
   Extensions and discoveries                                         1,110         28,491
   Production                                                          (364)        (5,131)
                                                               ------------   ------------
Proved reserves at December 31, 1997                                  2,638         46,994
   Revisions of previous estimates                                    2,374         12,698
   Purchases of reserves in place                                       284          2,898
   Extensions and discoveries                                         2,428         17,685
   Production                                                          (386)        (6,216)
                                                               ------------   ------------
Proved reserves at December 31, 1998                                  7,338         74,059
                                                               ============   ============

Proved developed reserves -
   December 31, 1995                                                  1,178         10,219
                                                               ============   ============
   December 31, 1996                                                    902         11,563
                                                               ============   ============
   December 31, 1997                                                  1,744         18,483
                                                               ============   ============
   December 31, 1998                                                  5,265         37,844
                                                               ============   ============
</TABLE>

     In addition  to the proved  reserves  disclosed  above,  the Company  owned
proved sulfur reserves of 420,000 long tons,  174,000 long tons and 197,000 long
tons at  December  31,  1998,  1997 and 1996,  respectively.  In addition to the
production  indicated  above, in 1997 and 1996 the Company  delivered 56,000 and
84,000  barrels,   respectively,   and  1,795  and  2,094  million  cubic  feet,
respectively, under the terms of a volumetric production payment agreement.

     Capitalized  Costs of Oil and Gas  Properties:  As of December 31, 1998 and
1997, the Company's  capitalized costs of oil and gas properties were as follows
(in thousands):
<TABLE>
<CAPTION>
                                                              December 31,
                                                        ------------------------
                                                           1998           1997
                                                        ----------     ---------
<S>                                                    <C>            <C>
Unevaluated properties                                 $    53,458    $   39,436
Evaluated properties                                       141,118       107,206
                                                        ----------     ---------
Total capitalized costs                                    194,576       146,642
Less:  Accumulated depreciation,
  depletion and amortization                               (45,599)      (33,727)
                                                        ----------     ---------
Net capitalized costs                                  $   148,977    $  112,915
                                                        ==========     =========
</TABLE>



                                      F-23
<PAGE>


     Of the  total  costs  excluded  from  the  amortization  calculation  as of
December  31,  1998,  $25,329,000  was incurred  during  1998,  $12,916,000  was
incurred  during 1997,  $8,793,000  was incurred  during  1996,  $3,748,000  was
incurred during 1995 and $2,672,000 was incurred during 1994. The Company cannot
accurately  predict when these costs will be included in the amortization  base,
but it is expected  that these costs will be evaluated in the next three to five
years.

     Costs Incurred in Oil and Gas  Activities:  The following  table sets forth
the  Company's  costs  incurred for oil and gas  activities  for the years ended
December 31, 1998, 1997 and 1996 (in thousands):
<TABLE>
<CAPTION>
                                                             1998           1997           1996
                                                          -----------    -----------     ----------
<S>                                                      <C>            <C>             <C>
Acquisition of properties:
  Evaluated                                              $      4,701   $     13,813    $   23,090
  Unevaluated                                                  15,207         10,857         7,000
Exploration costs                                              22,708         26,961        17,358
Development costs                                               5,318         12,318         3,913
                                                          -----------    -----------     ----------
Total costs incurred                                     $     47,934   $     63,949    $   51,361
                                                          ===========    ===========     ==========
</TABLE>

     Results of Operations for Oil and Gas Producing  Activities:  The following
table sets forth the results of operations for oil and gas producing  activities
for the years ended December 31, 1998, 1997 and 1996 (in thousands):
<TABLE>
<CAPTION>
                                                           1998             1997          1996
                                                        -----------     -----------     -----------
<S>                                                    <C>             <C>             <C>
Revenue                                                $     18,663    $     25,282    $     17,921
Production costs                                             (4,673)         (5,155)         (3,124)
Depreciation, depletion and amortization                    (11,872)        (12,666)         (7,212)
Impairment of oil and gas properties                              -          (9,560)              -
                                                        -----------     -----------     -----------
Income (loss) before income taxes                             2,118          (2,099)          7,585
Income tax benefit (expense)                                   (741)            735          (2,655)
                                                        -----------     -----------     -----------
Results of operations                                  $      1,377    $     (1,364)   $      4,930
                                                        ===========     ===========     ===========
</TABLE>

     In addition to the revenues  and  production  costs  disclosed  above,  the
Company had revenues from sulfur sales and related  production costs of $331,000
and $10,000  respectively,  for the year ended  December 31, 1998,  $398,000 and
$13,000  respectively,  for the year ended  December  31, 1997 and  $334,000 and
$10,000, respectively, for the year ended December 31, 1996.

     Standardized Measure of Discounted Future Net Cash Flows Relating to Proved
Oil and Gas Reserves: The following table sets forth the standardized measure of
the discounted  future net cash flows  attributable to the Company's  proved oil
and gas reserves as prescribed by SFAS No. 69. Future cash inflows were computed
by applying year-end prices of oil and gas to the estimated future production of
proved oil and gas reserves. Future prices actually received may differ from the
estimates in the standardized measure.

     Future  production and  development  costs  represent the estimated  future
expenditures (based on current costs) to be incurred in developing and producing
the proved  reserves,  assuming  continuation of existing  economic  conditions.
Future income tax expenses were computed by applying  statutory income tax rates
to the  difference  between  pre-tax net cash flows  relating  to the  Company's
proved oil and gas reserves and the tax basis of proved oil and gas  properties,
adjusted for tax credits and  allowances.  The  resulting  annual net cash flows
were then  discounted to present  value amounts by applying a 10 percent  annual
discount factor.

     Although the information presented is based on the Company's best estimates
of the required  data,  the methods and  assumptions  used in preparing the data
were those  prescribed  by the FASB.  Although not market  sensitive,  they were
specified in order to achieve  uniformity in assumptions  and to provide for the
use of  reasonably  objective  data.  It is  important  to note  here  that this
information  is neither fair market  value nor the present  value of future cash
flows and it does not reflect  changes in oil and gas prices  experienced  since
the  respective  year-end.  It is primarily a tool designed by the FASB to allow
for a reasonable  comparison of oil and gas reserves and changes therein through
the use of a standardized  method.  Accordingly,  the Company cautions that this
data should not be used for other than its intended purpose.


                                      F-24
<PAGE>


     Management  does  not  rely  upon  the  following   information  in  making
investment and operating decisions.  The Company, along with its partners, bases
such decisions upon a wide range of factors,  including estimates of probable as
well as proved reserves,  and varying price and cost assumptions considered more
representative  of  a  range  of  possible  economic   conditions  that  may  be
anticipated.
<TABLE>
<CAPTION>

                                                                                              December 31,
                                                                                 ----------------------------------------
                                                                                    1998          1997            1996
                                                                                 ----------     ---------      ----------
                                                                                              (in thousand)
<S>                                                                             <C>            <C>           <C>
  Future gross revenue                                                          $   248,608    $  162,762    $    127,905
  Future production costs                                                           (43,065)      (21,417)        (21,913)
  Future development costs                                                          (17,131)      (21,659)        (10,101)
  Future income taxes                                                               (47,541)      (27,453)        (26,524)
                                                                                 ----------     ---------      ----------
  Future net cash flows                                                             140,871        92,233          69,367

  10 percent annual discount for estimated timing of cash flows                     (59,328)      (27,636)        (17,277)
                                                                                 ----------     ---------      ----------
  Standardized measure of discounted future net cash flows                      $    81,543    $   64,597    $     52,090
                                                                                 ==========     =========      ==========
</TABLE>

     The above  table  excludes  future net cash flows  before  income  taxes of
$9,167,000,  $3,187,000 and  $3,495,000,  and  discounted  future net cash flows
before income taxes of $4,310,000, $2,350,000 and $2,427,000, as of December 31,
1998, 1997 and 1996, respectively, related to proved sulfur reserves.

     Natural  gas prices  have  declined  and oil prices  have  increased  since
December 31, 1998. Accordingly, the discounted future net cash flows shown above
could be different if the  standardized  measure were calculated using prices in
effect at the end of the first quarter.

     The  following  are the  principal  sources of changes in the  standardized
measure of  discounted  future net cash flows for the years ended  December  31,
1998, 1997 and 1996 (in thousands):
<TABLE>
<CAPTION>
                                                                             1998             1997             1996
                                                                          ---------        ----------       ----------
<S>                                                                      <C>             <C>               <C>
Standardized measure, beginning of year                                  $   64,597      $     52,090      $    16,058
Extensions and discoveries, net of related costs                             34,102            45,193           26,690
Sales of oil and gas produced, net of production costs                      (13,990)          (16,035)          (9,057)
Net changes in prices and production costs                                  (25,385)          (28,384)          24,561
Change in future development costs                                            3,626            (2,650)            (355)
Development costs incurred during the period that reduced
   future development costs                                                   4,330             7,802            2,042
Revision of previous quantity estimates                                      31,358            (8,927)           3,077
Repurchase of volumetric production payment                                       -             8,319                -
Purchases of reserves in place                                                4,609                 -           18,309
Sale of volumetric production payment                                             -                 -          (17,763)
Accretion of discount                                                         8,328             7,276            2,532
Net change in income taxes                                                   (7,422)            1,988          (11,406)
Change in production rates and other                                        (22,610)           (2,075)          (2,598)
                                                                          ---------        ----------       ----------
Standardized measure, end of year                                        $   81,543      $     64,597      $    52,090
                                                                          =========        ==========       ==========
</TABLE>


NOTE R - SUBSEQUENT EVENT

     On February 12, 1999,  the Company  completed a private  placement of three
series of unsecured Senior Notes totaling $138 million. The Series D Notes total
$20 million,  bear  interest at a fixed rate of 7.03% and mature on February 15,
2004, with no principal  payments due until  maturity.  The Series E Notes total
$75 million,  bear  interest at a fixed rate of 7.28% and mature on February 15,
2009, with annual  principal  payments of $12.5 million  beginning  February 15,
2004.  The Series F Notes total $43  million,  bear  interest at a fixed rate of
7.43% and mature on February  15,  2009,  with no  principal  payments due until
maturity. Interest on all series of the notes is payable semi-annually beginning
on August 15, 1999.  The Company used a portion of the proceeds to repay amounts
outstanding under its $75 million and $25 million revolving lines of credit; the
remainder will be used for capital expenditures.


                                      F-25



<PAGE>





                                     EXHIBIT
                                      INDEX
- --------------------------------------------------------------------------------

Exhibit   Title                                                           Page
                                                                          Number
- --------------------------------------------------------------------------------


10.49     Revolving  Credit  Agreement  dated as of December 11, 1998,
          between the Company and SunTrust Bank, Atlanta                     53

10.50     Note  Purchase  Agreement  dated as of  February  12,  1999,
          between the Company and the Series D Purchasers,  the Series
          E Purchasers and the Series F Purchasers                           80


21.1      Subsidiaries of the Registrant                                    222

23.1      Consent of Arthur Andersen LLP                                    224

23.2      Consent of Forrest A. Garb & Associates, Inc.                     226



                                                                   EXHIBIT 10.49


                           REVOLVING CREDIT AGREEMENT

          THIS  REVOLVING  CREDIT  AGREEMENT  (the  "AGREEMENT"),  dated  as  of
December  11,  1998,  is  between  SEITEL,  INC.,  a Delaware  corporation  (the
"BORROWER"),  and SUNTRUST BANK,  ATLANTA,  a Georgia banking  corporation  (the
"BANK").

                                    RECITALS:

          WHEREAS,  the Borrower has requested the Bank to establish a revolving
credit facility for advances up to an aggregate principal amount outstanding not
to exceed $25,000,000;

         WHEREAS,  the  Bank is  willing  to  establish  such  revolving  credit
facility to the Borrower upon the terms and conditions hereinafter set forth.

         NOW  THEREFORE,  in  consideration  of  the  premises  and  the  mutual
covenants herein contained, the parties hereto agree as follows:

1.       TERMS OF  COMMITMENT

         (a) ADVANCES.  Subject to the terms and  conditions of this  Agreement,
the Bank agrees to make one or more  Advances to the Borrower  from time to time
from the date hereof to the Termination Date in an aggregate principal amount at
any time  outstanding  not to exceed the  Commitment.  Subject to the  foregoing
limitations,  and the other terms and conditions of this Agreement, the Borrower
may  borrow,  repay,  and  reborrow  under the  Commitment;  PROVIDED,  that the
Borrower  may  neither   borrow  nor  reborrow  (but  can  continue,   prior  to
acceleration,  any Advance  pursuant to paragraph  (c)(iii)  below  hereof) if a
Potential Default or an Event of Default exists.

         (b) INTEREST.  The outstanding  principal  amount of the Advances shall
bear interest  prior to maturity at the  following  rates per annum which may be
selected by the  Borrower  subject to and in  accordance  with the terms of this
Agreement:

                    (i) the Base Rate, PLUS the Applicable Margin; or

                    (ii)  LIBOR for the  applicable  Interest  Period,  PLUS the
          Applicable Margin.

          Accrued and unpaid interest on the  outstanding  Advances shall be due
and payable (i) with respect to all Base Rate Advances, on the last Business Day
of each March,  June,  September  and  December,  (ii) with respect to all LIBOR
Advances,  on the last day of the applicable Interest Period,  (iii) on the date
of any  prepayment  in  accordance  with  SECTION  1(E)  hereof  and (iv) on the
Termination  Date.  Notwithstanding  the  foregoing,  upon the  occurrence  of a
Potential  Default or Event of Default  hereunder,  at the  Bank's  option,  all
outstanding  Advances  shall bear interest at the Default Rate,  which  interest
shall be payable from time to time on demand.

         (c) BORROWING PROCEDURE. (i) The Borrower shall give the Bank notice by
means of a borrowing notice for each requested  Advance by not later than 11: 00
A.M.  (Atlanta,  Georgia  time),  in the case of LIBOR Advances two (2) Business
Days prior to the date of such Advance,  and in the case of Base Rate  Advances,
on the same day as such  Advance,  specifying:  (i) the  requested  date of such
Advance  (which shall be a Business Day),  (ii) the amount of such Advance,  and
(iii) in the case of a LIBOR  Advance,  the  duration  of the  initial  Interest
Period.  The Bank at its option may accept  telephonic  requests  for  Advances,
provided that such acceptance  shall not constitute a waiver of the Bank's right
to delivery of a borrowing  notice in connection with subsequent  Advances.  Any
telephonic request for an Advance by the Borrower shall be promptly confirmed by
submission of a properly  completed  borrowing  notice to the Bank. Each Advance
shall be in a minimum  principal  amount  of  $1,000,000  or a greater  integral
multiple  of  $100,000.  Subject  to the  other  terms  and  conditions  of this
Agreement,  not  later  than  2:00  P.M.  (Atlanta,  Georgia  time)  on the date
specified  for each  Advance,  the Bank will make such Advance  available to the
Borrower by depositing the same, in immediately available funds, into an account
of the  Borrower  at the Bank or by wire  transfer  into an  account  at another
financial  institution  designated  by the  Borrower.  All  notices  under  this
paragraph shall be irrevocable.  Any notice under this paragraph received by the
Bank after the  prescribed  times set forth  above  shall be deemed to have been
received on the next Business Day.

                    (ii) The  Borrower  shall give the Bank  notice by not later
          than 11:00 A.M. (Atlanta, Georgia time) two (2) Business Days prior to
          the end of any  Interest  Period  of its  intention  to  continue  any
          outstanding  LIBOR Advance for a new Interest  Period and the duration
          of such new Interest Period. All such notices shall be irrevocable. If
          the Borrower  shall fail to give the Bank notice as specified  herein,
          such LIBOR  Advance shall be  automatically  continued for an Interest
          Period of one (1) month.  All Base Rate Advances  shall  automatically
          continue as Base Rate Advances  unless the Borrower  shall give notice
          to the Bank that it wishes to  convert a Base Rate  Advance to a LIBOR
          Advance,  in which case the Borrower  shall comply with the procedures
          specified  in paragraph  (i) above.  The Borrower may also convert any
          LIBOR Advance to a Base Rate Advance at the end of an Interest Period.

                    (iii) Notwithstanding the foregoing,  if a Potential Default
          or an Event of Default  exists,  all Advances  shall, if not repaid or
          accelerated,  be continued as Base Rate Advances  after the expiration
          of the then current Interest Period.

         (d) USE OF PROCEEDS.  The proceeds of all Advances shall be used by the
Borrower for general working capital needs.

         (e)  OPTIONAL  PREPAYMENTS.  The  Borrower  may,  upon at least two (2)
Business  Day's prior notice to the Bank,  prepay any  Advance,  in whole at any
time or from time to time in part  without  premium or penalty but with  accrued
interest to the date of prepayment on the amount so prepaid;  PROVIDED,  that an
Advance may be prepaid  only on the last day of the Interest  Period  unless the
Bank consents and the Borrower  pays to the Bank any amount due under  paragraph
(i) hereunder,  and each partial  prepayment shall be in the principal amount of
$1,000,000 or a greater  integral  multiple of $100,000.  All notices  hereunder
shall be irrevocable.

         (f) COMPUTATION OF INTEREST AND ALL FEES.  Interest  hereunder shall be
computed  on the  basis  of a year of 360  days and the  actual  number  of days
elapsed (including the first day but excluding the last day).

         (g) CHANGE IN  CIRCUMSTANCES.  Sections  3.1,  3.2,  3.3 and 3.5 of the
First Chicago Credit  Agreement are hereby  incorporated by reference herein and
made applicable to the Advances hereunder.

         (h) SUBSTITUTE BASE RATE  BORROWINGS.  If the obligation of the Bank to
make LIBOR  Advances  shall be suspended  pursuant to paragraph (g) hereof,  the
Borrower  shall have the option to repay or prepay all  affected  Advances or to
convert  such  LIBOR  Advances  to Base Rate  Advances  until  such time as such
conditions  causing  such  suspension  shall no longer be  effective in the sole
discretion of the Bank.

         (i) FUNDING INDEMNIFICATION.  If any payment of an LIBOR Advance occurs
on a date which is not the last day of the applicable  Interest Period,  whether
because of prepayment, acceleration or otherwise, or a LIBOR Advance is not made
on the date specified by the Borrower for any reason other than a default by the
Bank,  the Borrower will  indemnify the Bank for any loss or cost incurred by it
resulting  therefrom,  including,  without  limitation,  any  loss  or  cost  in
liquidating  or  employing  deposits  acquired  to fund or  maintain  such LIBOR
Advance.

2.       CONDITIONS PRECEDENT

          (a) INITIAL  ADVANCE.  The  obligation of the Bank to make the initial
Advance is subject to the following condition precedents:

                    (i) the receipt on or before the day of such  Advance all of
          the  following,  each  dated  (unless  otherwise  indicated)  the date
          hereof, in form and substance satisfactory to the Bank:

                              (1) This Agreement and the Revolving  Credit Note,
                    each duly executed by the Borrower.

                              (2)  A  certificate   of  good  standing  for  the
                    Borrower  and  each   Restricted   Subsidiary   which  is  a
                    corporation,   and  a  certificate  of  existence  for  each
                    Restricted Subsidiary which is a partnership, each certified
                    by the appropriate  governmental officer in its jurisdiction
                    of incorporation or organization, as the case may be.

                              (3)  Copies  (x)  certified  by the  Secretary  or
                    Assistant  Secretary of the Borrower and of each  Restricted
                    Subsidiary  which  is a  corporation,  respectively,  of its
                    articles  of  incorporation  (together  with all  amendments
                    thereto)  and its  by-laws  and of its  Board of  Directors'
                    resolutions  (and  resolutions  of other bodies,  if any are
                    deemed  necessary by counsel for the Bank)  authorizing  the
                    execution  of the Loan  Documents  to which such entity is a
                    party  and  (u)  certified  by the  Secretary  or  Assistant
                    Secretary  of  the  general   partner  of  each   Restricted
                    Subsidiary   which  is  a  partnership  of  its  partnership
                    agreement   and  any   partnership   certificate   or  other
                    significant  governing  document,  and  of  any  partnership
                    actions  authorizing  the execution of the Loan Documents to
                    which such entity is a party.

                              (4)  Incumbency  certificates,   executed  by  the
                    Secretary or Assistant Secretary of the Borrower and of each
                    Restricted  Subsidiary,  which  shall  identify  by name and
                    title and bear the  signature of the officers of such entity
                    authorized to sign the Loan Documents to which it is a party
                    and  (in  the  case  of the  Borrower)  to  make  borrowings
                    hereunder,   upon  which  certificates  the  Bank  shall  be
                    entitled to rely until  informed of any change in writing by
                    the Borrower or by a Restricted Subsidiary,  as the case may
                    be.

                              (5) A  certificate,  signed by a Senior  Financial
                    Officer  of  the  Borrower,  stating  that  on  the  initial
                    borrowing date no Event of Default or Potential  Default has
                    occurred and is continuing and demonstrating  compliance, on
                    and as of the initial  Borrowing  Date,  with the  financial
                    covenants  set forth in  paragraph  (f)  under  the  heading
                    "COVENANTS"  herein  and  with  Section  6.20  of the  First
                    Chicago Credit Agreement.

                              (6) A written  opinion of counsel to the  Borrower
                    and  the  Restricted  Subsidiaries  in  form  and  substance
                    satisfactory to the Bank.

                              (7) Written money transfer instructions  addressed
                    to the Bank and signed by an  Authorized  Officer,  together
                    with such other related money transfer  authorization as the
                    Bank may have reasonably requested.

                              (8) The Subsidiary  Guaranty duly executed by each
                    Restricted Subsidiary.

                              (9) A copy of the most  recent  reserve  report of
                    the type  described in Section  6.1(g) of the First  Chicago
                    Credit Agreement.

                              (10) A copy of the notice  delivered  to the Agent
                    pursuant  to  Section  6.1(j)  of the First  Chicago  Credit
                    Agreement.

                              (11)  Such  other  documents  as the  Bank  or its
                    counsel may have reasonably requested.

                    (ii)  CLOSING  FEE. The payment to the Bank of a closing fee
          equal to $135,000.

         (b) ALL  ADVANCES.  The  obligation  of the  Bank to make  any  Advance
(including  the  initial  Advance)  is  subject  to  the  following   additional
conditions precedent:

                    (i) NO  DEFAULT.  No Event of Default or  Potential  Default
          shall  have  occurred  and be  continuing  or would  result  from such
          Advance;

                    (ii)   REPRESENTATIONS   AND   WARRANTIES.    All   of   the
          representations  and warranties  contained in the Loan Documents shall
          be true and  correct  on and as of the date of such  Advance  with the
          same force and effect as if such  representations  and  warranties had
          been made on and as of such date; and

                    (iii) ADDITIONAL DOCUMENTATION. The Bank shall have received
          such additional  approvals,  opinions, or documents as the Bank or its
          legal counsel may reasonably request.

3.       REPRESENTATIONS AND WARRANTIES.

         The Borrower represents and warrants to the Bank that:

         (a)  ORGANIZATION;  POWER  AND  AUTHORITY.  (i) the  Borrower  (1) is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware;  (2) is duly qualified as a foreign corporation and is
in good standing in each jurisdiction in which such qualification is required by
law, other than those  jurisdictions  as to which the failure to be so qualified
or in good standing could not,  individually or in the aggregate,  reasonably be
expected to have a Material Adverse Effect;  and (3) has the corporate power and
authority to own or hold under lease the  properties  it purports to own or hold
under lease, to transact the business it transacts and proposes to transact,  to
execute and deliver this Agreement and to perform its obligations hereunder.

                    (ii) Each  Restricted  Subsidiary  (1) is a corporation or a
          partnership  duly  organized,  validly  existing and in good  standing
          under the laws of its  jurisdiction of  incorporation or organization;
          (2) is duly qualified as a foreign  corporation or partnership  and is
          in good standing in each  jurisdiction in which such  qualification is
          required  by law,  other  than  those  jurisdictions  as to which  the
          failure to be so qualified or in good standing could not, individually
          or in the aggregate, reasonably be expected to have a Material Adverse
          Effect;  and (3) has the corporate or partnership  power and authority
          to own or hold under lease the  properties  it purports to own or hold
          under lease,  to transact  the  business it transacts  and proposes to
          transact,  to execute  and  deliver  the  Subsidiary  Guaranty  and to
          perform the provisions hereof and thereof.

         (b) AUTHORIZATION AND VALIDITY.  (i) The execution and delivery of this
Agreement and the Revolving  Credit Note and the  performance by the Borrower of
its  obligations  hereunder  and  thereunder  have been duly  authorized  by all
necessary  corporate action on the part of the Borrower,  and this Agreement and
the Revolving Credit Note constitute the legal, valid and binding obligations of
the  Borrower  enforceable  against the Borrower in  accordance  with its terms,
except as such  enforceability  may be  limited  by (A)  applicable  bankruptcy,
insolvency,  reorganization,  moratorium  or other  similar laws  affecting  the
enforcement of creditors' rights generally and (B) general  principles of equity
(regardless  of whether such  enforceability  is  considered  in a proceeding in
equity or at law).

                    (ii) The execution and delivery of the  Subsidiary  Guaranty
          and the performance by each  Restricted  Subsidiary of its obligations
          thereunder  has been duly  authorized  by all  necessary  corporate or
          partnership action on the part of each Restricted Subsidiary,  and the
          Subsidiary Guaranty  constitutes a legal, valid and binding obligation
          of each  Restricted  Subsidiary  enforceable  against such  Restricted
          Subsidiary in accordance with its terms, except as such enforceability
          may   be   limited   by   (A)   applicable   bankruptcy,   insolvency,
          reorganization,   moratorium  or  other  similar  laws  affecting  the
          enforcement of creditors' rights generally and (B) general  principles
          of equity (regardless of whether such  enforceability is considered in
          a proceeding in equity or at law).

         (c)  ACCURACY  OF  INFORMATION.  No  information,   exhibit  or  report
furnished by the Borrower or any of its  Subsidiaries  to the Bank in connection
with the  negotiation  of, or compliance  with, this Agreement or the Subsidiary
Guaranty contained,  as of the date of such information,  exhibit or report, any
material  misstatement  of fact or omitted to state a material fact necessary to
make the statements contained therein no misleading,  or any other material fact
required pursuant to the terms of this Agreement to be contained therein.

         (d)  ORGANIZATION  AND OWNERSHIP OF SHARES OF RESTRICTED  SUBSIDIARIES;
AFFILIATES.  (i)  Schedule 1 contains  (except as noted  therein)  complete  and
correct lists of (1) the Restricted Subsidiaries, showing, as to each Restricted
Subsidiary,  the correct name thereof,  the jurisdiction of its organization and
the  percentage  of shares of each  class of its  outstanding  capital  stock or
similar  equity  interests  owned  by the  Borrower  and each  other  Restricted
Subsidiary,   and  (2)  the  Borrower's   Affiliates   (other  than   Restricted
Subsidiaries).

                    (ii)  All of the  outstanding  shares  of  capital  stock or
          similar  equity  interests  of each  Restricted  Subsidiary  shown  in
          Schedule  1  as  being  owned  by  the  Borrower  and  the  Restricted
          Subsidiaries   have  been   validly   issued,   are  fully   paid  and
          nonassessable  and are owned by the  Borrower  or  another  Restricted
          Subsidiary  free and clear of any Lien (except as otherwise  disclosed
          in Schedule 1).

                    (iii) No  Restricted  Subsidiary is a party to, or otherwise
          subject to any legal  restriction  or any  agreement  (other than this
          Agreement,  the First Chicago Credit Agreement,  the agreements listed
          on  Schedule  2 and  customary  limitations  imposed by  corporate  or
          partnership  law statutes)  restricting the ability of such Restricted
          Subsidiary  to pay  dividends out of profits or make any other similar
          distributions  of profits  to the  Borrower  or any of the  Restricted
          Subsidiaries that owns outstanding  shares of capital stock or similar
          equity or partnership interests of such Restricted Subsidiary.

         (e) FINANCIAL  STATEMENTS.  The December 31, 1997 audited  consolidated
financial statements of the Borrower and the Restricted  Subsidiaries heretofore
delivered to the Bank  (including in each case the related  schedules and notes)
present fairly, in all material respects, the consolidated financial position of
the  Borrower  and  the  Restricted  Subsidiaries  as of  the  respective  dates
specified  therein and the  consolidated  results of their  operations  and cash
flows  for the  respective  periods  so  specified  and have  been  prepared  in
accordance with generally accepted  accounting  principles in effect on the date
such  statements  were  prepared  consistently  applied  throughout  the periods
involved except as set forth in the notes thereto  (subject,  in the case of any
interim financial statements, to normal year end adjustments).

         (f) MATERIAL ADVERSE CHANGE. Since December 31, 1997, there has been no
change in the business, Property, prospects,  condition (financial or otherwise)
or results of operations of the Borrower and the Restricted  Subsidiaries  which
could reasonably be expected to have a Material Adverse Effect.

         (g) NO  CONFLICT OR  VIOLATION.  Neither the  execution,  delivery  and
performance  by the Borrower of the Agreement,  nor the execution,  delivery and
performance by any Restricted  Subsidiary of the Subsidiary  Guaranty,  will (i)
contravene, result in any breach of, or constitute a default under, or result in
the  creation  of any Lien in respect of any  Property  of the  Borrower  or any
Restricted  Subsidiary  under,  any indenture,  mortgage,  deed of trust,  loan,
purchase or credit agreement,  lease, corporate charter or by-laws,  partnership
agreement or other  significant  governing  document,  or any other agreement or
instrument  to which the Borrower or any  Restricted  Subsidiary  is bound or by
which the  Borrower  or any  Restricted  Subsidiary  or any of their  respective
properties may be bound or affected, (ii) conflict with or result in a breach of
any of the terms,  conditions or provisions of any order,  judgment,  decree, or
ruling of any court,  arbitrator  or  Governmental  Authority  applicable to the
Borrower or any  Restricted  Subsidiary  or (iii)  violate any  provision of any
statute or other rule or regulation of any Governmental  Authority applicable to
the Borrower or any Restricted Subsidiary.

         (h) GOVERNMENTAL AUTHORIZATIONS.  No consent, approval or authorization
of, or registration,  filing or declaration with, any Governmental  Authority is
required in connection  with the execution,  delivery or performance  (i) by the
Borrower  of  this  Agreement  or  (ii)  by  any  Restricted  Subsidiary  of the
Subsidiary Guaranty.

         (i) INCORPORATION OF REPRESENTATIONS  AND WARRANTIES FROM FIRST CHICAGO
CREDIT  AGREEMENT.  The Borrower  hereby makes and reaffirms to the Bank each of
the  representations  and  warranties  set forth in Sections  5.9 through  5.14,
5.15(b)  and 5.17 of the  First  Chicago  Credit  Agreement,  all of  which  are
incorporated in this Agreement by this reference, with the same force and effect
as if such  representations  and warranties had been set forth in their entirety
in this Agreement.

4.       COVENANTS

         In order further to induce the Bank to establish the  Commitment and to
make Advances to the Borrower thereunder, the Borrower agrees with the Bank that
it will observe and perform the following  covenants and obligations  during the
term of this Agreement:

         (a) FINANCIAL REPORTING. (i) The Borrower shall deliver to the Bank the
financial  statements and other financial  reports required  pursuant to Section
6.1,  and the  officer's  certificate  required  pursuant to Section 6.2, of the
First  Chicago  Credit  Agreement  at the same  time  that  such  documents  are
delivered to the Agent or any Lender  thereunder;  PROVIDED,  that the officer's
certificate  referenced in Section 6.2 shall include all financial covenants set
forth in  paragraph  (f)  hereof as well as  Section  6.20 of the First  Chicago
Credit Agreement  incorporated by reference herein and the statement  referenced
in paragraph (b) thereof  shall refer instead to "Potential  Default" and "Event
of Default" hereunder.

                    (ii) Promptly,  and in any case within 5 Business Days after
          the  Borrower  becomes  aware of any  material  issues or events which
          would cause the Borrower not to be Year 2000  Compliant  and Ready (as
          defined in paragraph (h) under the heading  "COVENANTS"),  a statement
          of the chief  executive  officer,  chief financial  officer,  or chief
          technology  officer of the Borrower  setting forth the details thereof
          and the action  which the  Borrower is taking or proposes to take with
          respect thereto,  and promptly upon the receipt thereof, a copy of any
          third party  assessments  of the Borrower's Y2K Plan together with any
          recommendations  made by such third  party  with  respect to Year 2000
          compliance.

         (b) PARI PASSU. The Borrower  covenants that its Obligations under this
Agreement do and will rank at least PARI PASSU with the  indebtedness  under the
First Chicago Credit Agreement and all other present and future unsecured Senior
Debt.

         (c) SUBSIDIARY GUARANTY.  The Borrower will cause each Subsidiary which
becomes a Restricted  Subsidiary after the date of this Agreement to execute and
deliver to the Bank a joinder  agreement  substantially  similar to the  joinder
agreement  in  the  First  Chicago  Credit  Agreement,  duly  executed  by  such
Subsidiary,  together  with an  opinion  of  counsel  satisfactory  to the  Bank
addressing  with respect to such  Subsidiary the issues relating to Subsidiaries
and the Subsidiary Guaranty in the form of opinion attached to the First Chicago
Credit Agreement as Exhibit "K".

         (d) EXPENSES;  INDEMNITY. The Borrower agrees to pay promptly all costs
and expenses incurred by the Bank in connection with any amendments,  waivers or
consents in respect of this Agreement and any other Loan Document.  In addition,
the  Borrower  agrees  to  indemnify  the  Bank and its  affiliates,  directors,
officers,  employees and agents against all costs, losses, liabilities,  damages
and  expenses  incurred  in  connection  with this  Agreement  and the  Advances
evidenced  by the  Revolving  Credit  Note  and the use by the  Borrower  of the
proceeds hereof,  unless caused by the gross negligence or willful misconduct of
any such indemnified party.

         (e) INCORPORATION OF COVENANTS FROM FIRST CHICAGO CREDIT AGREEMENT. The
Borrower  agrees to observe and perform each of the covenants and agreements set
forth in Sections 6.7 through 6.17 and Section 6.20 of the First Chicago  Credit
Agreement,  all of which  covenants  and  agreements  are  incorporated  in this
Agreement  by this  reference,  all with the same  force  and  effect as if such
covenants and agreements had been set forth in their entirety in this Agreement;
PROVIDED,  that any  reference  to "Agent" or "each  Lender"  shall refer to the
Bank; and PROVIDED FURTHER, that the last paragraph of Section 6.15 of the First
Chicago  Credit  Agreement  shall  also  apply  to the  Obligations  under  this
Agreement and the Revolving Credit Note, so that the Commitment and all Advances
made under the Revolving  Credit Note shall at all times be equally secured on a
PARI PASSU basis with the lenders under the First Chicago Credit Agreement.  Any
violation of Section 6.15 of the First Chicago Credit  Agreement as incorporated
by reference herein shall constitute a Potential Default  hereunder,  whether or
not any such provision is made or any equitable Lien is created  pursuant hereto
or thereto.

         (f)  FINANCIAL COVENANTS.

                    (i)  Consolidated  Net  Worth  shall  not be less  than $108
          Million  PLUS an  aggregate  amount  equal to fifty  percent  (50%) of
          Consolidated Net Income (but, in each case, only if a positive number)
          for each  completed  fiscal year beginning with the fiscal year ending
          12/31/98.

                    (ii)  EBITDA  for  the  period  of four  consecutive  fiscal
          quarters of the Borrower  then most  recently  ended shall not be less
          than five hundred percent (500%) of Consolidated  Interest Expense for
          such period.

                    (iii)  Consolidated  Debt  shall not  exceed  fifty per cent
          (50%) of Total  Capitalization  for any fiscal quarter of the Borrower
          and its Restricted Subsidiaries on a consolidated basis.

         (g)  EFFECT OF  TERMINATION  OF FIRST  CHICAGO  CREDIT  AGREEMENT.  The
Borrower  agrees that,  if the First Chicago  Credit  Agreement is terminated or
otherwise  ceases to be in force and effect prior to the  Termination  Date, the
representations and warranties,  covenants,  and the Events of Default set forth
therein  that are  incorporated  in this  Agreement  by  reference  or otherwise
referred  to in this  Agreement,  shall  nevertheless  be deemed to survive  and
continue in full force and effect for all  purposes of this  Agreement.  In such
event, the Borrower agrees, upon request by the Bank, to enter into an amendment
to  this  Agreement  to set  forth  specifically  in  this  Agreement  all  such
representations and warranties,  covenants,  and Events of Default,  but no such
action  shall be required in order to effect the survival  and  continuation  of
such provisions.

         (h) YEAR 2000  COMPLIANCE.  The Borrower has developed a  comprehensive
working  plan  (the  "Y2K  PLAN") to insure  that the  Borrower's  software  and
hardware  systems  which  impact  or  affect in any  material  way the  business
operations of the Borrower will be Year 2000 Compliant and Ready (defined below)
by not later than June 30,  1999.  Upon request of the Bank,  the Borrower  will
deliver  to the  Bank a copy of such  Y2K  Plan  and a copy of any  third  party
assessment  of the Y2K Plan (if  available).  The  Borrower has met the Y2K Plan
milestones  such  that all  hardware  and  software  systems  will be Year  2000
Compliant and Ready in accordance with the Y2K Plan, except for any such failure
to meet such milestones which would not have a Material Adverse Effect.  As used
herein,  "YEAR 2000 COMPLIANT AND READY" means that the Borrower's  hardware and
software  systems with respect to the  operation of its business and its general
business  plan will:  (i) handle date  information  involving  any and all dates
before,  during  and/or  after  January  1,  2000,  including  accepting  input,
providing  output and performing  date  calculations  in whole or in part;  (ii)
operate accurately  without  interruption on and in respect of any and all dates
before,  during  and/or  after  January  1,  2000  and  without  any  change  in
performance;  (iii) respond to and process two digit year input without creating
any  ambiguity  as to the  century;  and  (iv)  store  and  provide  date  input
information without creating any ambiguity as to the century.

5.       EVENTS OF DEFAULTS; REMEDIES.

         Each of the  following  events shall  constitute  an "Event of Default"
under this Agreement:

         (a) Failure by the Borrower to pay any  principal  when due; or failure
by the Borrower to pay any  interest or any other  amount  under this  Agreement
within five (5) days after the same becomes due; or

         (b)  Failure by the  Borrower  to perform or observe  any  covenant  or
agreement set forth in paragraph (f) under the heading  "COVENANTS"  hereinabove
or any of the covenants  incorporated by reference under paragraph (e) under the
heading  "COVENANTS"  hereinabove  which  constitute  immediate  Defaults  under
Section 7.3 of the First Chicago Credit Agreement; or

         (c)  Failure by the  Borrower  to perform or observe  any  covenant  or
agreement  set forth in  paragraphs  (b),  (c),  (d) or (h)  under  the  heading
"COVENANTS"  hereinabove or any of the covenants incorporated by reference under
paragraph (e) under the heading  "COVENANTS"  hereinabove which are not included
in paragraph (b) above,  which failure remains  unremedied for 30 days after the
earlier  of its  discovery  by the  Borrower  or written  notice  thereof to the
Borrower by the Bank;

         (d) Any  representation or warranty made or deemed made by or on behalf
of the Borrower or any of its  Subsidiaries  to the Bank under or in  connection
with this Agreement or any  certificate  or information  delivered in connection
with the Agreement or the Subsidiary  Guaranty shall be materially  false on the
date as of which made; or

         (e) The  Borrower or any  Restricted  Subsidiary  shall fail to pay its
debts  generally  as they come due,  or shall  file any  petition  or action for
relief under any  bankruptcy,  reorganization,  insolvency or moratorium law, or
any other law or laws for the relief of, or relating to, debtors; or

         (f) An involuntary petition shall be filed under any bankruptcy statute
against the Borrower or any  Restricted  Subsidiary,  or a custodian,  receiver,
trustee, assignee for the benefit of creditors (or other similar official) shall
be appointed to take  possession,  custody,  or control of the properties of the
Borrower or any  Restricted  Subsidiary,  unless such petition or appointment is
set aside or withdrawn  or ceases to be in effect  within 60 days after the date
of said filing or appointment; or

         (g) The  Subsidiary  Guaranty  shall  fail to remain  in full  force or
effect or any action shall be taken to  discontinue  or assist the invalidity or
unenforceability of the Subsidiary Guaranty,  or any Restricted Subsidiary shall
fail to comply with any of the terms or provisions of the  Subsidiary  Guaranty,
or any Restricted  Subsidiary denies that it has any further liability under the
Subsidiary Guaranty, or gives notice to such effect.

         (h) The  occurrence of any "Default" as set forth in Article VII of the
First Chicago Credit  Agreement (other than those Defaults which are included in
paragraphs (b) or (c) above.

         Upon the occurrence of any such Event of Default,  the Bank may, in its
sole discretion,  by notice to the Borrower,  declare all amounts payable by the
Borrower  under this  Agreement  and/or  under the  Revolving  Credit Note to be
forthwith due and payable,  and the same shall thereupon  immediately become due
and payable without demand, presentment,  protest or further notice of any kind,
all of which are hereby expressly waived by the Borrower.

         No remedy  conferred  on or reserved to the Bank in this  Agreement  is
intended to be exclusive of any other available remedy or remedies, but each and
every such remedy  shall be  cumulative  and shall be in addition to every other
remedy  given under this  Agreement  or now or  hereafter  existing at law or in
equity  or by  statute.  No delay or  omission  to  exercise  any right or power
accruing upon any default,  omission or failure of performance  hereunder  shall
impair any such right or power or shall be construed to be a waiver thereof, but
any such right or power may be  exercised  from time to time and as often as may
be deemed  expedient.  In order to exercise  any remedy  reserved to the Bank in
this  Agreement,  it shall not be necessary to give any notice,  other than such
notice as may be herein expressly  required.  If any provision contained in this
Agreement  shall be breached by the Borrower and  thereafter  duly waived by the
Bank, such waiver shall be limited to the particular  breach so waived and shall
not be deemed to waive any other breach hereunder. No waiver, amendment, release
or  modification  of this Agreement  shall be established by conduct,  custom or
course of dealing,  but solely by an  instrument in writing duly executed by the
parties  thereunto duly  authorized by this  Agreement.  Any waiver,  amendment,
release or  modification  executed  by the  Borrower,  the Agent and the Lenders
under the First  Chicago  Credit  Agreement  that  waives,  amends,  releases or
modifies  any of the  representations  and  warranties,  covenants,  or Defaults
incorporated in this Agreement from the First Chicago Credit Agreement shall not
be effective as a waiver, amendment,  release, or modification of such provision
as incorporated in this Agreement unless the Bank expressly  consents thereto in
a writing duly executed by the Bank.

6.       SELECTED DEFINITIONS

CAPITALIZED  TERMS USED HEREIN  WITHOUT  DEFINITION AND WHICH ARE DEFINED IN THE
FIRST CHICAGO  CREDIT  AGREEMENT  SHALL HAVE THE SAME MEANINGS  HEREIN AS IN THE
FIRST CHICAGO CREDIT AGREEMENT.

"ADVANCE"  shall mean any advance of funds under the Commitment  pursuant to the
terms of this  Agreement.  An Advance  may be either a "Base Rate  Advance" or a
"LIBOR Advance".

"APPLICABLE  MARGIN" shall mean (i) during any Level 1 Period,  0.625% per annum
with respect to LIBOR  Advances  and 0.00% with  respect to Base Rate  Advances,
(ii) during any Level 2 Period,  0.75% per annum with respect to LIBOR  Advances
and 0.00% with respect to Base Rate  Advances,  (iii) during any Level 3 Period,
1.0% per annum with  respect to LIBOR  Advances  and 0.00% with  respect to Base
Rate  Advances and (iv) during any Level 4 Period,  1.50% per annum with respect
to LIBOR  Advances and 0.50% with respect to Base Rate  Advances,  PROVIDED that
all  adjustments to the Applicable  Margin shall be effective  commencing on the
fifth  Business DAY after (x) the delivery of financial  statements  showing the
required ratio for the  applicable  Level or (y) the Bank becomes aware that the
Borrower or any  Subsidiary  has incurred  additional  Indebtedness  which would
affect  the  calculation  of the Debt to Cash Flow from  Operations  Ratio,  and
PROVIDED  FURTHER that in the event that the Borrower  shall at any time fail to
furnish to the Bank the financial  statements  required to be delivered pursuant
to Sections  6.1(a) and (b) of the First  Chicago  Credit  Agreement  or fail to
notify  the  Bank,  pursuant  to  Section  6.1(j) of the  First  Chicago  Credit
Agreement,  of the incurrence of any such  Indebtedness,  the maximum Applicable
Margin shall apply until such time as such financial statements are so delivered
or the Bank is notified of the incurrence of such Indebtedness,  as the case may
be. From the closing date to the next determination date in accordance with this
definition, the Applicable Margin shall be 0.75% per annum.

"BASE  RATE"  shall mean the  higher of (i) the Prime Rate and (ii) the  Federal
Funds  Effective  Rate plus 0.50% per annum.  Each change in any  interest  rate
provided for herein based upon the Base Rate resulting from a change in the Base
Rate shall take effect at the time of such  change in the Base Rate.

"BASE RATE ADVANCE" shall mean any Advance that bears interest at the Base Rate.

"BORROWING DATE" shall mean a date on which an Advance is made hereunder.

"COMMITMENT"  shall  mean the  commitment  of the Bank to make  Advances  to the
Borrower in a principal amount up to $25,000,000 on the terms and conditions set
forth in this Agreement.

"DEFAULT  RATE" shall mean for all  outstanding  LIBOR Advances until the end of
the applicable  Interest Period,  2% per annum above the then existing  interest
rate for such  Interest  Period,  and  thereafter  and with respect to Base Rate
Advances, the Base Rate, PLUS the Applicable Margin, PLUS 2% per annum.

"EVENT OF DEFAULT"  shall mean those events set forth under the heading  "Events
of Default" hereinabove.

"FIRST CHICAGO CREDIT AGREEMENT" shall mean the Revolving Credit Agreement dated
as of July 22, 1996 among Seitel, Inc., the Lenders Party thereto, and The First
National  Bank of  Chicago,  as  Agent,  as such  Agreement  has  been  amended,
restated, supplemented or otherwise modified as of the date hereof.

"INTEREST  PERIOD" shall mean,  with respect to any LIBOR  Advance,  such period
commencing on the date such Advance is made or, in the case of each  subsequent,
successive  Interest Period, the last day of the next preceding Interest Period,
and ending on the numerically  corresponding day in the first,  second, or third
calendar  month  thereafter,  as the  Borrower may select as provided in SECTION
1(B) hereof;  PROVIDED,  that: (i) the first day of an Interest Period must be a
Business Day, (ii) any Interest Period that would otherwise end on a day that is
not a Business Day shall be extended to the next succeeding Business Day, unless
such Business Day falls in the next calendar  month,  in which case the Interest
Period shall end on the next preceding  Business Day, (iii) any Interest  Period
which begins on the last Business Day of a calendar month (or on a day for which
there is no numerically corresponding day in the calendar month at the end of an
Interest  Period)  shall end on the last Business Day of a calendar  month,  and
(iv) no Interest Period shall extend beyond the Termination Date.

"LEVEL 1 PERIOD"  shall mean any period  during which the Debt to Cash Flow from
Operations  Ratio  measured as of the end of the most recent fiscal  quarter was
less than 1.0 to 1.0.

"LEVEL 2 PERIOD"  shall  mean any  period  which  does not  qualify as a Level 1
Period during which the Debt to Cash Flow from  Operations  Ratio measured as of
the end of the most recent fiscal quarter was less than 2.0 to 1.0.

"LEVEL 3 PERIOD"  shall  mean any  period  which  does not  qualify as a Level 1
Period or a Level 2 Period  during  which the Debt to Cash Flow from  Operations
Ratio measured as of the end of the most recent fiscal quarter was less than 2.5
to 1.0.

"LEVEL 4 PERIOD"  shall  mean any  period  which  does not  qualify as a Level 1
Period, a Level 2 Period or a Level 3 Period.

"LIBOR"  shall mean the rate per annum for  deposits in U.S.  dollars of amounts
equal or comparable to the principal  amount of such advance  offered for a term
comparable to such interest period, which rate appears on the Telerate Page 3750
as of 11:00 A.M.  (London,  England  time),  two (2) business  days prior to the
beginning of such  interest  period;  PROVIDED,  that if no such  offered  rates
appear  on such  page,  the  rate  used  for such  interest  period  will be the
arithmetic average (rounded upwards, if necessary, to the next higher 1/100th of
1%) of rates  offered by the Bank to not less than two major  banks in New York,
New York at approximately  10:00 A.M.  (Atlanta,  Georgia time) two (2) business
days prior to the beginning of such interest period for deposits in U.S. dollars
in the London interbank  market for a period  comparable to the principal amount
of such advance, as the case may be, DIVIDED BY a number equal to 1.00 MINUS the
LIBOR Reserve Percentage. The rate so determined in accordance herewith shall be
rounded  upwards to the nearest  multiple of 1/100th of 1%.  TELERATE  PAGE 3750
shall mean the display designated as "Page 3750" on the Dow Jones Market Service
(or such other page as may replace Page 3750 on that service or another  service
as may be  nominated  by the British  Bankers'  Association  as the  information
vendor for the  purpose of  displaying  British  Bankers'  Association  Interest
Settlement Rates for Dollars).  LIBOR RESERVE  PERCENTAGE shall mean the reserve
percentage  applicable  to such  interest  period  (or if  more  than  one  such
percentage  shall be so applicable,  the daily average of such  percentages  for
those days in such interest period during which any such percentage  shall be so
applicable) under regulations issued from time to time by the Board of Governors
of the Federal  Reserve System (or any successor)  for  determining  the maximum
reserve requirement (including, without limitation, any emergency, supplemental,
or other marginal reserve  requirement) for the Bank with respect to liabilities
or assets consisting of or including  "eurocurrency  liabilities" (as defined in
Regulation  D of the Board of  Governors of the Federal  Reserve  System,  as in
effect from time to time) having a term equal to such interest period.

"LIBOR  ADVANCE"  shall mean any  Advance  that bears  interest  based on a rate
determined by reference to LIBOR.

"LOAN  DOCUMENTS"  shall mean this  Agreement,  the Revolving  Credit Note,  the
Subsidiary   Guaranty,   and  certificates  and  other  documents  delivered  in
connection  therewith,  either  as  originally  executed  or as may be  amended,
supplemented or otherwise modified.

"OBLIGATIONS" shall mean all unpaid principal of and accrued and unpaid interest
on the  Revolving  Credit  Note,  all accrued and unpaid fees and all  expenses,
reimbursements  indemnities  and other  obligations  of the Borrower to the Bank
hereunder and under the Revolving Credit Note.

"POTENTIAL  DEFAULT" shall mean any event which, with the passage of time or the
giving of notice or both, would constitute an Event of Default.

"PRIME RATE" shall mean the rate of interest per annum  designated  from time to
time by the Bank at its  principal  office in  Atlanta,  Georgia to be its prime
rate,  which rate of interest may not be the lowest rate  available to customers
of the Bank, with any change in the Prime Rate to be effective as of the date of
such change.

"REVOLVING  CREDIT NOTE" shall mean the promissory note dated the date hereof in
the principal amount of $25,000,000  executed by the Borrower and payable to the
order to the  Bank,  either  as  originally  executed  or as it may be  amended,
supplemented or otherwise modified.

"SUBSIDIARY  GUARANTY" shall mean the guaranty  agreement  substantially  in the
form of Exhibit "J" of the First Chicago Credit Agreement executed and delivered
by the existing Restricted Subsidiaries in favor of the Bank.

7.       MISCELLANEOUS

         (a) SUCCESSORS AND ASSIGNS.  This Agreement shall bind and inure to the
benefit  of the  Borrower  and the Bank,  and their  respective  successors  and
assigns; PROVIDED, that the Borrower shall have no right to assign its rights or
obligations hereunder to any Person. The Bank may assign its rights and delegate
its  obligations  under this  Agreement and the other Loan Documents and further
may  assign  all or any  part of its  Commitment  and  any  Advances  under  the
Revolving  Credit  Note,  or any other  interest  herein  or in any  other  Loan
Document to other  financial  institutions  and accredited  investors,  with the
prior written  consent of the Borrower  (which consent will not be  unreasonably
withheld);  PROVIDED,  that such  consent  shall not be  required if a Potential
Default or Event of Default exists at the time of such assignment.  Any assignee
shall have, to the extent of such assignment unless otherwise  provided therein,
the same rights,  obligations  and benefits as it would have if it were the Bank
hereunder and under the other Loan Documents.  The Bank may sell  participations
in the Commitment  and/or any Advances under the Revolving  Credit Note to other
financial  institutions  and  accredited  investors  without  the consent of the
Borrower;  PROVIDED,  that no participant  shall have any right to deal directly
with the Borrower  and no  participant  shall have any voting  rights under this
Agreement  except with respect to any proposed  increase in the Commitment,  any
extension of the  Termination  Date, any decrease in the interest rate margin or
any release of any guarantor or any collateral.

         (b) ENTIRE  AGREEMENT.  This Agreement,  the Revolving Credit Note, and
the other Loan Documents  embody the final,  entire  agreement among the parties
hereto and supersede any and all prior commitments, agreements, representations,
and  understandings,  whether  written or oral,  relating to the subject  matter
hereof  and  may  not  be   contradicted   or  varied  by   evidence  of  prior,
contemporaneous,  or subsequent  oral  agreements or  discussions of the parties
hereto. There are no oral agreements among the parties hereto.

         (c)  AMENDMENTS,  ETC. No amendment or waiver of any  provision of this
Agreement,  the  Revolving  Credit Note, or any other Loan Document to which the
Borrower is a party, nor any consent to any departure by the Borrower therefrom,
shall in any event be effective  unless the same shall be agreed or consented to
by the Bank and the Borrower, and each such waiver or consent shall be effective
only in the specific instance and for the specific purpose for which given.

         (d) NOTICES. All notices and other communications  provided for in this
Agreement and the other Loan Documents shall be given or made by telecopy, or in
writing and telecopied,  mailed by certified mail return receipt  requested,  or
delivered to the intended recipient at the following addresses:

                  If to Bank:                SunTrust Bank, Atlanta
                                             25 Park Place, N.E./24th Floor
                                             Atlanta, Georgia 30303

                                             Attn:    Mr. John Fields
                                                      First Vice President

                                             Tel:     (404) 724-3667
                                             Fax:     (404) 827-6270

                  If to Borrower:            Seitel, Inc.

                                             50 Briar Hollow Lane, 7th Floor  W.
                                             Houston, Texas 77027

                                             Attn:    Debra D. Valice

                                                      Senior Vice President of
                                                      Finance, Chief Financial
                                                      Officer, Treasurer &
                                                      Secretary

                                             Tel:     (713) 627-1990
                                             Fax:     (713) 627-1114

or, as to any party at such other  address as shall be  designated by such party
in a notice to each other party given in accordance with this paragraph.  Except
as otherwise provided in this Agreement, all such communications shall be deemed
to have been duly given  when  transmitted  by  telecopy,  subject to  telephone
confirmation  of  receipt,  or when  personally  delivered  or, in the case of a
mailed notice, when duly deposited in the mails, in each case given or addressed
as aforesaid.

         (e)  COUNTERPARTS.  This  Agreement  may be  executed  in  one or  more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same agreement.

         (f)  SEVERABILITY.  Any provision of this  Agreement held by a court of
competent  jurisdiction  to be  invalid  or  unenforceable  shall not  impair or
invalidate  the  remainder of this  Agreement  and the effect  thereof  shall be
confined to the provision held to be invalid or illegal.

         (g) CONSTRUCTION.  The Borrower and the Lender acknowledge that each of
them  has had the  benefit  of  legal  counsel  of its own  choice  and has been
afforded an  opportunity  to review this  Agreement and the other Loan Documents
with its legal  counsel  and that this  Agreement  and the other Loan  Documents
shall be construed as if jointly drafted by the parties hereto.

         (h)   CONFIDENTIALITY.   The  Bank  agrees  to  hold  any  confidential
information which it may receive from the Borrower pursuant to this Agreement in
confidence,  except for disclosure (i) to its Affiliates, (ii) to legal counsel,
accountants,  and other professional  advisors to the Bank or to any assignee or
participant,  (iii) to regulatory officials, (iv) to any Person required by law,
regulation or legal process and (v) to any  participant or assignee which agrees
to be bound by this paragraph.

         (i) MAXIMUM RATE.  It is the intention of the parties  hereto to comply
with all applicable usury laws;  accordingly,  it is agreed that notwithstanding
any provision to the contrary herein and in the Revolving Credit Note, or in any
of the documents securing payment thereof or other wise relating hereto, no such
provision  shall  require  the payment or permit the  collection  of interest in
excess of the highest rate allowed under applicable law (the "Maximum Rate"). If
any excess of interest in such respect is provided for, or shall be  adjudicated
to be so provided for,  herein or in the Revolving  Credit Note or in any of the
documents  securing payment thereof or otherwise  relating hereto,  then in such
event:

                    (i)  the  provisions  of this  paragraph  shall  govern  and
          control,

                    (ii) neither the Borrower, the Restricted Subsidiaries,  nor
          their  heirs,  legal  representatives,  successors  or assigns nor any
          party  liable for the payment on the  Advances,  shall be obligated to
          pay the amount of  interest  to the extent that it is in excess of the
          Maximum Rate,

                    (iii) any such excess with respect to any Advance  which may
          have been  collected  shall,  at the  election of the Bank,  be either
          applied  as a credit  against  the then  unpaid  principal  amount  of
          Advances or refunded to the Borrower, and

                    (iv) the provisions  hereof and of the Revolving Credit Note
          and any documents  securing  payment  thereof  shall be  automatically
          reformed so that the  effective  rate of interest  shall be reduced to
          the Maximum Rate. For the purpose of determining the Maximum Rate, all
          interest payments with respect hereto shall be amortized, prorated and
          spread  throughout  the  full  term of  this  Agreement  so  that  the
          effective rate of interest charged hereunder is uniform throughout the
          term hereof.

         (j) GOVERNING LAW; JURISDICTION.  (i) THIS AGREEMENT AND THE OTHER LOAN
DOCUMENTS  SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF GEORGIA  (WITHOUT  GIVING  EFFECT TO THE  CONFLICT  OF LAWS  PRINCIPLES
THEREOF).

                    (ii)  THE  BORROWER  HEREBY   IRREVOCABLY   SUBMITS  TO  THE
          NON-EXCLUSIVE  JURISDICTION OF ANY UNITED STATES FEDERAL COURT SITTING
          IN THE  NORTHERN  DISTRICT  OF GEORGIA OR IN ANY  GEORGIA  STATE COURT
          SITTING IN FULTON COUNTY, GEORGIA, IN ANY ACTION OR PROCEEDING ARISING
          OUT OF OR RELATING TO THIS AGREEMENT AND/OR THE REVOLVING CREDIT NOTE,
          AND THE BORROWER HEREBY  IRREVOCABLY AGREES THAT ALL CLAIMS IN RESPECT
          OF SUCH ACTION OR PROCEEDING  MAY BE HEARD AND  DETERMINED IN ANY SUCH
          COURT AND  IRREVOCABLY  WAIVES ANY  OBJECTION  IT MAY NOW OR HEREAFTER
          HAVE AS TO THE VENUE OF ANY SUCH SUIT, ACTION OR PROCEEDING BROUGHT IN
          SUCH COURT OR THAT SUCH COURT IS AN INCONVENIENT FORUM. NOTHING HEREIN
          SHALL  LIMIT THE RIGHT OF THE BANK TO BRING  PROCEEDINGS  AGAINST  THE
          BORROWER  IN  THE  COURTS  OF ANY  OTHER  JURISDICTION.  ANY  JUDICIAL
          PROCEEDING  BY  THE  BORROWER  AGAINST  BANK  INVOLVING,  DIRECTLY  OR
          INDIRECTLY,  ANY  MATTER IN ANY WAY  ARISING  OUT OF,  RELATED  TO, OR
          CONNECTED WITH THIS AGREEMENT  AND/OR THE REVOLVING  CREDIT NOTE SHALL
          BE BROUGHT ONLY IN A FEDERAL COURT SITTING IN THE NORTHERN DISTRICT OF
          GEORGIA OR IN A GEORGIA STATE COURT SITTING IN FULTON COUNTY, GEORGIA.

         (k) WAIVER OF JURY TRIAL.  THE  BORROWER AND THE BANK EACH HEREBY WAIVE
TRIAL BY JURY IN ANY JUDICIAL PROCEEDING INVOLVING,  DIRECTLY OR INDIRECTLY, ANY
MATTER (WHETHER SOUNDING IN TORT,  CONTRACT OR OTHERWISE) IN ANY WAY ARISING OUT
OF,  RELATED TO, OR CONNECTED WITH THIS  AGREEMENT  AND/OR THE REVOLVING  CREDIT
NOTE.

         IN  WITNESS  WHEREOF,  the  Borrower  and the  Bank  have  caused  this
Agreement to be executed  and  delivered  under seal (of the  Borrower  only) by
their respective duly authorized officers as of the date first above written.

                                  SEITEL, INC.

                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Senior Vice President

                                     Attest:/s/ Marcia H. Kendrick
                                            ------------------------------------
                                     Name: Marcia H. Kendrick
                                     Title: Assistant Secretary

                                                                [CORPORATE SEAL]

                                     SUNTRUST BANK, ATLANTA

                                     By:/s/ F. McClellan Deaver, III
                                        ----------------------------------------
                                     Name: F. McClellan Deaver, III
                                     Title: Group Vice President

                                     By:/s/ David J. Edge
                                        ----------------------------------------
                                     Name: David J. Edge
                                     Title: Vice President




<PAGE>
                              REVOLVING CREDIT NOTE

$25,000,000.00                                                 December 11, 1998

          FOR  VALUE  RECEIVED,   the  undersigned  SEITEL,   INC.,  a  Delaware
corporation  ("MAKER"),  hereby  promises to pay to the order of SUNTRUST  BANK,
ATLANTA ("PAYEE"),  at its offices at 25 Park Place, N.E., Atlanta,  Georgia, in
Dollars, the principal sum of TWENTY FIVE MILLION DOLLARS  ($25,000,000),  or so
much thereof as may be advanced and  outstanding  hereunder and under the Credit
Agreement (as  hereinafter  defined),  together with interest on the outstanding
principal  balance from day to day remaining,  at varying rates per annum as set
forth in the Credit Agreement (as hereinafter defined).

          Interest on the  indebtedness  evidenced by this Revolving Credit Note
shall be  computed  on the basis of a year of 360 days and the actual  number of
days elapsed (including the first day but excluding the last day).

          All  principal  of and accrued and unpaid  interest on this  Revolving
Credit  Note shall be due and  payable as  specified  in the  hereafter  defined
Credit  Agreement.  Upon the  occurrence  of a Potential  Default or an Event of
Default, interest may accrue, at the Payee's option, at the Default Rate.

          This Revolving  Credit Note is the Revolving  Credit Note provided for
in that certain Revolving Credit Agreement dated as of December 11, 1998 between
Maker and the Payee (as the same may be amended  from time to time  herein,  the
"CREDIT  AGREEMENT").  Capitalized terms not otherwise defined herein shall have
the same  meaning as in the Credit  Agreement.  Reference  is hereby made to the
Credit Agreement for provisions affecting this Revolving Note, including without
limitation,  the terms and conditions under which this Revolving Credit Note may
be prepaid or its  maturity  date  accelerated.  This  Revolving  Credit Note is
guaranteed  pursuant to the Subsidiary  Guaranty  dated the date hereof,  all as
more  specifically  described  in the Credit  Agreement,  and  reference is made
thereto for a statement of the terms and provisions thereof.

          THIS  REVOLVING  CREDIT  NOTE SHALL BE GOVERNED  BY AND  CONSTRUED  IN
ACCORDANCE  WITH THE LAWS OF THE STATE OF GEORGIA AND THE APPLICABLE LAWS OF THE
UNITED STATES OF AMERICA.

          TIME IS OF THE ESSENCE UNDER THIS  REVOLVING  CREDIT NOTE. In addition
to and in limitation  of the  foregoing,  the Maker further  promises to pay all
costs and  expenses of  collection,  including  without  limitation,  reasonable
attorneys'  fees,  if this  Revolving  Credit Note is collected by or through an
attorney at law or in bankruptcy or any other judicial proceeding.

          Maker expressly waives any presentment,  demand, protest, or notice in
connection with this Revolving Credit Note, now or hereafter  otherwise required
applicable law.

          IN WITNESS WHEREOF, the Maker has caused this Revolving Credit Note to
be executed and delivered under seal by its duly  authorized  officers as of the
date first above written.

                                     SEITEL, INC.

                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Senior Vice President


                                     Attested By:/s/ Marcia H. Kendrick
                                                 -------------------------------
                                     Name: Marcia H. Kendrick
                                     Title: Assistant Secretary


                                                                (CORPORATE SEAL)



<PAGE>
                               SUBSIDIARY GUARANTY

          THIS SUBSIDIARY  GUARANTY (this "Guaranty") is made as of the 11th day
of  December,  1998,  by  SEITEL  DATA  CORP.,  SEITEL  DELAWARE,  INC.,  SEITEL
MANAGEMENT,  INC.,  SEITEL  GEOPHYSICAL,  INC., DDD ENERGY,  INC.,  SEITEL GAS &
ENERGY CORP.,  SEITEL POWER CORP., SEITEL NATURAL GAS, INC., MATRIX GEOPHYSICAL,
INC.,  EXSOL,  INC.,   DATATEL,   INC.,  SEITEL  OFFSHORE  CORP.,  all  Delaware
corporations,  GEO-BANK, INC. and ALTERNATIVE COMMUNICATION  ENTERPRISES,  INC.,
each a Texas corporation,  SEITEL  INTERNATIONAL,  INC. and AFRICAN GEOPHYSICAL,
INC., each a Cayman Islands  corporation,  and SEITEL DATA LTD., a Texas limited
partnership  (collectively,  the  "SUBSIDIARY  GUARANTORS") in favor of SunTrust
Bank, Atlanta, and its successors and permitted assigns (the "BANK"),  under the
Credit Agreement referred to below.

                              W I T N E S S E T H:

          WHEREAS,  Seitel, Inc., a Delaware corporation (the "PRINCIPAL"),  and
the Bank have entered into the Revolving  Credit Agreement dated the date hereof
(as same may be amended or modified from time to time, the "CREDIT  AGREEMENT"),
providing, subject to the terms and conditions thereof, for extensions of credit
to be made by the Bank to the Principal;

          WHEREAS,  it is a condition  precedent  to the Bank  establishing  the
Commitment  and making  Advances  under the Credit  Agreement  and the Revolving
Credit Note that each of the  Subsidiary  Guarantors  execute  and deliver  this
Guaranty,  whereby each of the Subsidiary Guarantors shall guarantee the payment
when due,  subject to Section 9 hereof,  of all  principal,  interest  and other
Obligations  that shall be at any time payable by the Principal under the Credit
Agreement and the Revolving Credit Note; and

          WHEREAS,  in consideration of the financial and other support that the
Principal  has provided,  and such  financial and other support as the Principal
may in the future provide, to the Subsidiary Guarantors,  and in order to induce
the Bank to establish the Commitment and to make Advances to the Principal under
the Credit  Agreement  and the  Revolving  Credit Note,  each of the  Subsidiary
Guarantors is willing to guarantee the  Obligations  of the Principal  under the
Credit Agreement and the Revolving Credit Note;

          NOW,  THEREFORE,  in  consideration of the premises and other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged, the parties hereto agree as follows:

          SECTION 1. DEFINITIONS.  Terms defined in the Credit Agreement and not
otherwise defined herein have, as used herein, the respective  meanings provided
for therein.

          SECTION 2.  REPRESENTATIONS  AND  WARRANTIES.  Each of the  Subsidiary
Guarantors  represents and warrants (which  representations and warranties shall
be deemed to have been renewed upon each Borrowing Date) that:

                    (a) such  Subsidiary  Guarantor  (i) is a  corporation  or a
          partnership  duly  organized,  validly  existing and in good  standing
          under the laws of its  jurisdiction of  incorporation or organization;
          (ii) is duly qualified as a foreign  corporation or partnership and is
          in good standing in each  jurisdiction in which such  qualification is
          required  by law,  other  than  those  jurisdictions  as to which  the
          failure to be so qualified or in good standing count not, individually
          or in the aggregate, reasonably be expected to have a Material Adverse
          Effect; and (iii) has the corporate or partnership power and authority
          to own or hold under lease the  properties  it purports to own or hold
          under lease,  to transact  the  business it transacts  and proposes to
          transact,  to execute and  deliver  this  Guaranty  and to perform the
          provisions hereof;

                    (b) the  execution  and  delivery of this  Guaranty  and the
          performance by such Subsidiary Guarantor of its obligations  hereunder
          have been duly  authorized by all necessary  corporate or  partnership
          action  and this  Guaranty  constitutes  a legal,  valid  and  binding
          obligation  of such  Subsidiary  Guarantor  enforceable  against it in
          accordance  with  its  terms,  except  as such  enforceability  may be
          limited  by (i)  applicable  bankruptcy,  insolvency,  reorganization,
          moratorium  or  other  similar  haws  affecting  the   enforcement  of
          creditors'  rights  generally  and (ii) general  principles  of equity
          (regardless  of  whether  such   enforceability  is  considered  in  a
          proceeding in equity or a law);

                    (c)  the  execution,   delivery  and   performance  by  such
          Subsidiary Guarantor of this Guaranty will not (i) contravene,  result
          in any  breach of, or  constitute  a default  under,  or result in the
          creation of any Lien in respect of any Property of the Borrower or any
          Restricted Subsidiary under, any indenture,  mortgage,  deed of trust,
          loan,  purchase  or credit  agreement,  lease,  corporate  charter  or
          by-laws,   partnership   agreement  or  other  significant   governing
          document,  or any other  agreement or instrument to which the Borrower
          or any Restricted  Subsidiary is bound or by which the Borrower or any
          Restricted  Subsidiary or any of their  respective  properties  may be
          bound or affected,  (ii) conflict with or result in a breach of any of
          the terms, conditions or provisions of any order, judgment, decree, or
          ruling of any court,  arbitrator or Governmental  Authority applicable
          to the  Borrower or any  Restricted  Subsidiary  or (iii)  violate any
          provision  of  any  statute  or  other  rule  or   regulation  of  any
          Governmental  Authority  applicable to the Borrower or any  Restricted
          Subsidiary;

                    (d) after giving effect to the transactions  contemplated by
          the  Credit  Agreement  and  this  Guaranty  and as of the date of its
          execution  and delivery of this Guaranty (i) the fair salable value of
          the assets of such Subsidiary Guarantor, taken as a whole, exceeds its
          liabilities,  taken as a whole, (ii) such Subsidiary Guarantor is able
          to pay and discharge all of its debts (including,  without limitation,
          its current  liabilities)  as they become due;  (iii) such  Subsidiary
          Guarantor  will  not be  insolvent  and  will  not be  engaged  in any
          business or transaction for which it has unreasonably  small assets or
          capital and (iv) such  Subsidiary  Guarantor  has no intent to hinder,
          delay or defraud any entity to which it is, or will become,  indebted,
          or to incur  debts  that  would be beyond  its  ability to pay as they
          mature.

          SECTION 3. THE  GUARANTY.  Subject  to  Section 9 hereof,  each of the
Subsidiary  Guarantors hereby  unconditionally  guarantees the full and punctual
payment  (whether at stated  maturity,  upon  acceleration  or otherwise) of the
principal of and interest on all Advances,  and the full and punctual payment of
all  other  amounts  payable  by  the  Principal  under  the  Credit  Agreement,
including, without limitation, the Obligations (all of the foregoing, subject to
the  provisions  of Section 9 hereof,  being  referred  to  collectively  as the
"GUARANTEED  OBLIGATIONS").  Upon failure by the Principal to pay punctually any
such amount, each of the Subsidiary Guarantors agrees that it shall forthwith on
demand pay the amount  not so paid at the place and in the manner  specified  in
the Credit Agreement.

          SECTION 4. GUARANTY  UNCONDITIONAL.  Subject to Section 9 hereof,  the
obligations  of  each  of  the   Subsidiary   Guarantors   hereunder   shall  be
unconditional   and  absolute  and,  without  limiting  the  generality  of  the
foregoing, shall not be released, discharged or otherwise affected by:

                    (i) any extension,  renewal, settlement,  compromise, waiver
          or release in respect of any  obligation  of the  Principal  under the
          Credit  Agreement or any other Loan  Document,  by operation of law or
          otherwise  or any  obligation  of any  other  guarantor  of any of the
          Obligations;

                    (ii) any  modification  or amendment of or supplement to the
          Credit Agreement or any other Loan Document;

                    (iii) any release, nonperfection or invalidity of any direct
          or indirect  security for any  obligation of the  Principal  under the
          Credit Agreement,  any other Loan Document,  or any obligations of any
          other guarantor of any of the Obligations;

                    (iv) any change in the corporate or  partnership  existence,
          structure or ownership of the Principal or any other  guarantor of any
          of the Obligations, or any insolvency,  bankruptcy,  reorganization or
          other  similar  proceeding  affecting  the  Principal,  or  any  other
          guarantor of the Obligations,  or its assets or any resulting  release
          or  discharge  of any  obligation  of  the  Principal,  or  any  other
          guarantor of any of the Obligations;

                    (v) the existence of any claim, setoff or other rights which
          the Subsidiary  Guarantors may have at any time against the Principal,
          any other guarantor of any of the  Obligations,  the Bank or any other
          Person, whether in connection herewith or any unrelated transactions;

                    (vi)  any  invalidity  or  unenforceability  relating  to or
          against  the   Principal  or  any  other   guarantor  of  any  of  the
          Obligations, for any reason related to the Credit Agreement, any other
          Loan  Document,  or any  provision  of  applicable  law or  regulation
          purporting  to  prohibit  the payment by the  Principal,  or any other
          guarantor of the  Obligations,  of the principal of or interest on any
          Advance or any other amount payable by the Principal  under the Credit
          Agreement or any other Loan Document; or

                    (vii) any other act or  omission to act or delay of any kind
          by the Principal, any other guarantor of the Obligations,  the Bank or
          any other Person or any other circumstance whatsoever which might, but
          for the  provisions of this  Section,  constitute a legal or equitable
          discharge of any Subsidiary Guarantor's obligations hereunder.

          SECTION  5.  DISCHARGE  ONLY UPON  PAYMENT IN FULL;  REINSTATEMENT  IN
CERTAIN CIRCUMSTANCES.  Each of the Subsidiary Guarantors' obligations hereunder
shall remain in full force and effect  until all  Guaranteed  Obligations  shall
have been paid in full and the Commitment  under the Credit Agreement shall have
terminated.  If at any time any payment of the  principal  of or interest on any
Advance or any other  amount  payable by the  Principal or any other party under
the  Credit  Agreement  or any  other  Loan  Document  is  rescinded  or must be
otherwise restored or returned upon the insolvency, bankruptcy or reorganization
of the Principal or otherwise,  each of the Subsidiary  Guarantors'  obligations
hereunder  with  respect to such  payment  shall be  reinstated  as though  such
payment had been due but not made at such time.

          SECTION  6.  WAIVER  OF  NOTICE.  Each  of the  Subsidiary  Guarantors
irrevocably waives acceptance hereof,  presentment,  demand, protest and, to the
fullest extent permitted by law, any notice not provided for herein,  as well as
any  requirement  that at any time any action be taken by any Person against the
Principal, any other guarantor of the Obligations, or any other Person.

          SECTION  7.  SUBROGATION.  Each of the  Subsidiary  Guarantors  hereby
agrees  not to assert any right,  claim or cause of action,  including,  without
limitation,   a  claim  for  subrogation,   reimbursement,   indemnification  or
otherwise, against the Principal arising out of or by reason of this Guaranty or
the  obligations  hereunder,  including,  without  limitation,  the  payment  or
securing  or  purchasing  of  any of the  Obligations  by any of the  Subsidiary
Guarantors unless and until the Guaranteed  Obligations are paid in full and any
commitment  to lend  under the Credit  Agreement  and other  Loan  Documents  is
terminated.

          SECTION  8.  STAY OF  ACCELERATION.  If  acceleration  of the time for
payment of any amount payable by the Principal under the Credit Agreement or any
other Loan Document is stayed upon the insolvency,  bankruptcy or reorganization
of the Principal,  all such amounts otherwise subject to acceleration  under the
terms of the Credit  Agreement or any other Loan Document  shall  nonetheless be
payable by each of the Subsidiary  Guarantors  hereunder  forthwith on demand by
the Bank.

     SECTION 9.  LIMITATION ON  OBLIGATIONS.  (a) It is the intention of each of
the Subsidiary  Guarantors and the Bank that each of the Subsidiary  Guarantor's
obligations  hereunder  shall be in, but not in excess  of, as of any date,  the
greater of the following  (such greater amount  determined  hereunder  being the
relevant Subsidiary  Guarantor's "Maximum Liability"):  (i) the aggregate amount
of all monies received by the Subsidiary  Guarantor from the Principal after the
date hereof  (whether by loan,  capital  infusion or other  means),  or (ii) the
maximum  amount  (such  amount  being the  Subsidiary  Guarantor's  "Alternative
Limitation")  not subject to avoidance under Title 11 of the United States Code,
as  same  may be  amended  from  time  to  time,  or any  applicable  state  law
(collectively,  the "Bankruptcy  Code").  To that end, but as to the Alternative
Limitation of the  Subsidiary  Guarantors,  only to the extent such  obligations
would  otherwise  be  subject  to  avoidance  under the  Bankruptcy  Code if the
Subsidiary Guarantor is not deemed to have received valuable consideration, fair
value  or  reasonably  equivalent  value  for  its  obligations  hereunder,  any
Subsidiary  Guarantor's  obligations  hereunder  shall be reduced to that amount
which, after giving effect thereto,  would not render such Subsidiary  Guarantor
insolvent, or leave such Subsidiary Guarantor with an unreasonably small capital
to conduct its  business,  or cause such  Subsidiary  Guarantor to have incurred
debts (or intended to have incurred  debts) beyond its ability to pay such debts
as they mature,  at the time such  obligations  are deemed to have been incurred
under  the  Bankruptcy  Code.  As  used  herein,   the  terms   "insolvent"  and
"unreasonably small capital" shall likewise be determined in accordance with the
Bankruptcy Code. This Section 9(a) with respect to the Alternative Limitation of
the Subsidiary  Guarantor is intended  solely to preserve the rights of the Bank
hereunder to the maximum  extent not subject to avoidance  under the  Bankruptcy
Code, and neither the Subsidiary  Guarantor nor any other person or entity shall
have any right or claim under this Section 9(a) with respect to the  Alternative
Limitation,  except  to the  extent  necessary  so that the  obligations  of the
Subsidiary  Guarantor  hereunder  shall  not  be  rendered  voidable  under  the
Bankruptcy Code.

                    (b)  Each  of the  Subsidiary  Guarantors  agrees  that  the
          Guaranteed  Obligations may at any time and from  time-to-time  exceed
          the Maximum Liability of each Subsidiary Guarantor, and may exceed the
          aggregate  Maximum  Liability  of  all  other  Subsidiary  Guarantors,
          without  impairing  this Guaranty or affecting the rights and remedies
          of the Bank hereunder. Nothing in this Section 9(b) shall be construed
          to increase any Subsidiary  Guarantor's  obligations  hereunder beyond
          its Maximum Liability.

                    (c)  In  the  event  any  Subsidiary  Guarantor  (a  "Paying
          Subsidiary  Guarantor")  shall make any payment or payments under this
          Guaranty or shall suffer any loss as a result of any realization  upon
          any  collateral  granted  by it to secure its  obligations  under this
          Guaranty,   each  other  Subsidiary   Guarantor  (each  a  "Non-Paying
          Subsidiary  Guarantor")  shall  contribute  to such Paying  Subsidiary
          Guarantor an amount equal to such  Non-Paying  Subsidiary  Guarantor's
          "Pro Rata Share" of such payment or payments made, or losses suffered,
          by such Paying  Subsidiary  Guarantor.  For the purposes hereof,  each
          Non-Paying Subsidiary Guarantor's "Pro Rata Share" with respect to any
          such  payment  or loss  by a  Paying  Subsidiary  Guarantor  shall  be
          determined  as of the date on which  such  payment or loss was made by
          reference to the ratio of (i) such Non-Paying  Subsidiary  Guarantor's
          Maximum  Liability as of such date (without giving effect to any right
          to receive, or obligation to make, any contribution hereunder) to (ii)
          the aggregate Maximum Liability of all Subsidiary Guarantors hereunder
          (including such Paying Subsidiary  Guarantor) as of such date (without
          giving  effect to any right to receive,  or  obligation  to make,  any
          contribution hereunder). Nothing in this Section 9(c) shall affect any
          Subsidiary  Guarantor's several liability for the entire amount of the
          Guaranteed  Obligations  (up to such  Subsidiary  Guarantor's  Maximum
          Liability).  Each of the  Subsidiary  Guarantors  covenants and agrees
          that its right to receive any contribution  under this Guaranty from a
          Non-Paying  Subsidiary  Guarantor  shall be subordinate  and junior in
          right of payment to all the Guaranteed Obligations.  The provisions of
          this  Section  9(c)  are for the  benefit  of both  the  Bank  and the
          Subsidiary  Guarantors  and may be enforced by any one, or all of them
          in accordance with the terms hereof.

          SECTION 10. NOTICES. All notices, requests and other communications to
any party  hereunder  shall be given or made by  telecopier or other writing and
telecopied,  or mailed or delivered to the intended  recipient at its address or
telecopier  number set forth on the signature pages hereof or such other address
or  telecopy  number as such party may  hereafter  specify  for such  purpose by
notice to the Bank in accordance  with the  provisions of paragraph  7(d) of the
Credit  Agreement.  Except as  otherwise  provided  in this  Guaranty,  all such
communications  shall be  deemed to have been duly  given  when  transmitted  by
telecopier,  or personally  delivered or, in the case of a mailed notice sent by
certified mail  return-receipt  requested,  on the date set forth on the receipt
(provided,  that any  refusal  to accept any such  notice  shall be deemed to be
notice  thereof  as of the  time of any such  refusal),  in each  case  given or
addressed as aforesaid.

          SECTION 11. NO WAIVERS.  No failure or delay by the Bank in exercising
any right,  power or privilege  hereunder  shall operate as a waiver thereof nor
shall any  single or  partial  exercise  thereof  preclude  any other or further
exercise  thereof or the exercise of any other right,  power or  privilege.  The
rights and remedies  provided in this Guaranty,  the Credit  Agreement,  and the
other Loan  Documents  shall be  cumulative  and not  exclusive of any rights or
remedies provided by law.

          SECTION 12.  SUCCESSORS AND ASSIGNS.  This Guaranty is for the benefit
of the Bank and its  successors  and  permitted  assigns  and in the event of an
assignment of any amounts payable under the Credit Agreement,  or the other Loan
Documents, the rights hereunder, to the extent applicable to the indebtedness so
assigned,  may be  transferred  with such  indebtedness.  This Guaranty shall be
binding upon each of the Subsidiary  Guarantors and their respective  successors
and permitted assigns.

          SECTION  13.  CHANGES  IN  WRITING.  Neither  this  Guaranty  nor  any
provision hereof may be changed,  waived,  discharged or terminated  orally, but
only in writing signed by each of the Subsidiary Guarantors and the Bank.

          SECTION 14. GOVERNING LAW; SUBMISSION TO JURISDICTION;  WAIVER OF JURY
TRIAL.  THIS GUARANTY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE  WITH THE
LAW OF THE STATE OF GEORGIA. EACH OF THE SUBSIDIARY GUARANTORS HEREBY SUBMITS TO
THE  NONEXCLUSIVE  JURISDICTION  OF THE  UNITED  STATES  DISTRICT  COURT FOR THE
NORTHERN  DISTRICT OF GEORGIA AND OF ANY GEORGIA  STATE COURT  SITTING IN FULTON
COUNTY,  GEORGIA  AND FOR  PURPOSES OF ALL LEGAL  PROCEEDINGS  ARISING OUT OF OR
RELATING TO THIS GUARANTY (INCLUDING,  WITHOUT LIMITATION, ANY OF THE OTHER LOAN
DOCUMENTS)  OR THE  TRANSACTIONS  CONTEMPLATED  HEREBY.  EACH OF THE  SUBSIDIARY
GUARANTORS  IRREVOCABLY  WAIVES,  TO THE FULLEST  EXTENT  PERMITTED  BY LAW, ANY
OBJECTION WHICH ANY OF THEM MAY NOW OR HEREAFTER HAVE TO THE LAYING OF THE VENUE
OF ANY SUCH  PROCEEDING  BROUGHT  IN SUCH A COURT  AND ANY  CLAIM  THAT ANY SUCH
PROCEEDING  BROUGHT IN SUCH A COURT HAS BEEN BROUGHT IN AN  INCONVENIENT  FORUM.
EACH OF THE SUBSIDIARY GUARANTORS,  AND THE BANK ACCEPTING THIS GUARANTY, HEREBY
IRREVOCABLY  WAIVES  ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL  PROCEEDING
ARISING  OUT OF OR RELATING TO THIS  GUARANTY OR THE  TRANSACTIONS  CONTEMPLATED
HEREBY TO THE EXTENT PERMITTED BY APPLICABLE LAW.

          SECTION 15. AGENT FOR SERVICE OR PROCESS.  EACH  SUBSIDIARY  GUARANTOR
HEREBY  IRREVOCABLY  AND  UNCONDITIONALLY  AGREES  THAT  PROCESS  SERVED  EITHER
PERSONALLY OR BY REGISTERED MAIL SHALL  CONSTITUTE,  TO THE EXTENT  PERMITTED BY
LAW, ADEQUATE SERVICE OF PROCESS IN ANY SUIT,  ACTION OR PROCEEDING  ARISING OUT
OF OR  RELATING  TO THIS  GUARANTY,  OR ANY ACTION OR  PROCEEDING  TO EXECUTE OR
OTHERWISE  ENFORCE ANY JUDGMENT IN RESPECT OF ANY BREACH  HEREUNDER,  BROUGHT BY
THE BANK AGAINST SUCH  SUBSIDIARY  GUARANTOR OR ANY OF ITS PROPERTY.  RECEIPT OF
PROCESS SO SERVED  SHALL BE  CONCLUSIVELY  PRESUMED AS  EVIDENCED  BY A DELIVERY
RECEIPT FURNISHED BY THE UNITED STATES POSTAL SERVICE OR ANY COMMERCIAL DELIVERY
SERVICE.  WITHOUT  LIMITING THE  FOREGOING,  SUCH  SUBSIDIARY  GUARANTOR  HEREBY
APPOINTS,  IN THE CASE OF ANY SUCH ACTION OR PROCEEDING BROUGHT IN THE COURTS OR
IN THE STATE OF GEORGIA:

                          CT Corporation System
                          1201 Peachtree Street, N. E.
                          Atlanta, Georgia 30361

TO  RECEIVE,  FOR IT AND ON ITS  BEHALF,  SERVICE OR  PROCESS.  EACH  SUBSIDIARY
GUARANTOR  SHALL AT ALL  TIMES  MAINTAIN  AN AGENT FOR  SERVICE  OF  PROCESS  IN
ATLANTA, GEORGIA AND MAY FROM TIME TO TIME APPOINT SUCCEEDING AGENTS FOR SERVICE
OF PROCESS BY  NOTIFYING  THE BANK OF SUCH  APPOINTMENT,  WHICH  AGENTS SHALL BE
ATTORNEYS,  OFFICERS OR DIRECTORS OF SUCH SUBSIDIARY GUARANTOR,  OR CORPORATIONS
WHICH IN THE  ORDINARY  COURSE OF BUSINESS ACT AS AGENTS FOR SERVICE OF PROCESS.
NOTHING  HEREIN  SHALL IN ANY WAY BE DEEMED TO LIMIT THE ABILITY OR RIGHT OF THE
BANK TO SERVE ANY WRIT, PROCESS OR SUMMONS IN ANY MANNER PERMITTED BY APPLICABLE
LAW.

          SECTION 16. TAXES, ETC. All payments required to be made by any of the
Subsidiary Guarantors hereunder shall be made without setoff or counterclaim and
free and clear of and without deduction or withholding for or on account of, any
present or future taxes, levies,  imposts, duties or other charges of whatsoever
nature imposed by any government or any political or taxing  authority  thereof,
provided,  however,  that if any of the Subsidiary Guarantors is required by law
to make such deduction or withholding, such Subsidiary Guarantor shall forthwith
pay to the Bank, as  applicable,  such  additional  amount as results in the net
amount  received  by the Bank  equaling  the full  amount  which would have been
received by the Bank, had no such deduction or withholding been made.

          IN WITNESS WHEREOF,  each of the Subsidiary Guarantors has caused this
Guaranty to be duly executed,  under seal, by its  authorized  officer as of the
day and year first above written.

                                     SEITEL DATA CORP.
                                     By:/s/ Barbara Steen
                                        ----------------------------------------
                                     Name: Barbara Steen
                                     Title: Vice President

                                     SEITEL DELAWARE, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     SEITEL MANAGEMENT, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     SEITEL GEOPHYSICAL, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     DDD ENERGY, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     SEITEL GAS & ENERGY CORP.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     SEITEL POWER CORP.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     SEITEL NATURAL GAS, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     MATRIX GEOPHYSICAL, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Name: Debra D. Valice
                                     Title: Vice President

                                     EXSOL, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                     DATATEL, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                     SEITEL OFFSHORE CORP.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                     GEO-BANK, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                     ALTERNATIVE COMMUNICATION ENTERPRISES, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                     SEITEL INTERNATIONAL, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                     AFRICAN GEOPHYSICAL, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                     SEITEL DATA LTD.
                                     By: SEITEL DELAWARE, INC.
                                     By:/s/ Debra D. Valice
                                        ----------------------------------------
                                     Title: Vice President

                                                                   EXHIBIT 10.50

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------






                                  SEITEL, INC.


                             -----------------------
                             NOTE PURCHASE AGREEMENT
                             -----------------------



                          DATED AS OF FEBRUARY 12, 1999






          $20,000,000 7.03% SERIES D SENIOR NOTES DUE FEBRUARY 15, 2004
          $75,000,000 7.28% SERIES E SENIOR NOTES DUE FEBRUARY 15, 2009
          $43,000,000 7.43% SERIES F SENIOR NOTES DUE FEBRUARY 15, 2009



- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                                     <PAGE>


                                TABLE OF CONTENTS

SECTION                                                                   PAGE
- -------                                                                   -----
1.   AUTHORIZATION OF NOTES.................................................1

2.   SALE AND PURCHASE OF NOTES.............................................2

3.   CLOSING................................................................2
     3.1      The Closing...................................................2
     3.2      Failure of the Company to Deliver.............................3
     3.3      Failure by You to Deliver.....................................3

4.   YOUR CONDITIONS TO CLOSINGS............................................3
     4.1      Representations and Warranties................................3
     4.2      Performance; No Default.......................................3
     4.3      Compliance Certificates.......................................3
     4.4      Opinions of Counsel...........................................4
     4.5      Purchases Permitted By Applicable Law, etc....................4
     4.6      Sale of Other Notes...........................................4
     4.7      Payment of Special Counsel Fees...............................5
     4.8      Private Placement Numbers.....................................5
     4.9      Changes in Corporate Structure................................5
     4.10     Subsidiary Guaranty...........................................5
     4.11     Proceedings and Documents.....................................5

4A.  COMPANY'S CLOSING CONDITIONS...........................................5
     4A.1     Representations and Warranties................................5
     4A.2     Sales Permitted by Applicable Law, etc........................6

5.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY..........................6
     5.1      Organization; Power and Authority.............................6
     5.2      Authorization, etc............................................7
     5.3      Disclosure....................................................7
     5.4      Organization and Ownership of Shares of
              Subsidiaries; Affiliates......................................8
     5.5      Financial Statements..........................................8
     5.6      Compliance with Laws, Other Instruments, etc..................9
     5.7      Governmental Authorizations, etc..............................9
     5.8      Litigation; Observance of Agreements, Statutes and
              Orders........................................................9
     5.9      Taxes.........................................................9
     5.10     Title to Property; Leases....................................10
     5.11     Licenses, Permits, etc.......................................10
     5.12     Compliance with ERISA........................................10
     5.13     Private Offering by the Company..............................12

<PAGE>

     5.14     Use of Proceeds; Margin Regulations..........................12
     5.15     Existing Debt; Future Liens..................................12
     5.16     Foreign Assets Control Regulations, etc......................13
     5.17     Status under Certain Statutes................................13
     5.18     Environmental Matters........................................13
     5.19     Year 2000 Problem............................................13

6.   REPRESENTATIONS OF THE PURCHASER......................................14
     6.1      Purchase for Investment......................................14
     6.2      Legend.......................................................14
     6.3      ERISA........................................................15
     6.4      Organization; Power and Authority; Compliance with
              Laws.........................................................16
     6.5      Authorization, etc...........................................16

7.   INFORMATION AS TO COMPANY.............................................16
     7.1      Financial and Business Information...........................16
     7.2      Officer's Certificate........................................21
     7.3      Inspection...................................................21

8.   PREPAYMENT OF THE NOTES...............................................22
     8.1      Required Prepayments.........................................22
     8.2      Optional Prepayments with Make-Whole Amount;
              Rescission...................................................22
     8.3      Allocation of Partial Prepayments............................23
     8.4      Maturity; Surrender, etc.....................................24
     8.5      Purchase of Notes............................................24
     8.6      Make-Whole Amount............................................24

9.   AFFIRMATIVE COVENANTS.................................................26
     9.1      Compliance with Law..........................................26
     9.2      Insurance....................................................26
     9.3      Maintenance of Properties....................................26
     9.4      Payment of Taxes and Claims..................................27
     9.5      Corporate Existence, etc.....................................27
     9.6      Pari Passu...................................................27
     9.7      Subsidiary Guaranty..........................................27

10.  NEGATIVE COVENANTS....................................................28
     10.1     Net Worth....................................................28
     10.2     Interest Coverage............................................28
     10.3     Debt Incurrence..............................................28
     10.4     Liens........................................................29
     10.5     Mergers and Consolidations...................................31
     10.6     Sale of Assets...............................................32
     10.7     Restricted Payments and Restricted Investments...............35
     10.8     Limitations on Certain Restricted Subsidiary
              Actions......................................................36
     10.9     Affiliate Transactions.......................................37
     10.10    Line of Business.............................................37

<PAGE>

11.  EVENTS OF DEFAULT.....................................................37

12.  REMEDIES ON DEFAULT, ETC..............................................39
     12.1     Acceleration.................................................39
     12.2     Other Remedies...............................................40
     12.3     Rescission...................................................40
     12.4     No Waivers or Election of Remedies, Expenses, etc............40

13.  REGISTRATION; EXCHANGE; SUBSTITUTION OF NOTES.........................40
     13.1     Registration of Notes........................................40
     13.2     Transfer and Exchange of Notes...............................41
     13.3     Replacement of Notes.........................................41

14.  PAYMENTS ON NOTES.....................................................42
     14.1     Place of Payment.............................................42
     14.2     Home Office Payment..........................................42

15.  EXPENSES, ETC.........................................................42
     15.1     Transaction Expenses.........................................42
     15.2     Survival.....................................................43

16.  SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT..........43

17.  AMENDMENT AND WAIVER..................................................43
     17.1     Requirements.................................................43
     17.2     Solicitation of Holders......................................44
     17.3     Binding Effect, etc..........................................44
     17.4     Notes held by Company, etc...................................44

18.  NOTICES...............................................................45

19.  REPRODUCTION OF DOCUMENTS.............................................45

20.  CONFIDENTIAL INFORMATION..............................................45

21.  SUBSTITUTION OF PURCHASER.............................................47

22.  MISCELLANEOUS.........................................................47
     22.1     Successors and Assigns.......................................47
     22.2     Payments Due on Non-Business Days............................47
     22.3     Severability.................................................47
     22.4     Construction.................................................48
     22.5     Counterparts.................................................48

<PAGE>

     22.6     Governing Law................................................48
     22.7     Consent to Jurisdiction; Appointment of Agent................48
     22.8     Defeasance...................................................49
     22.9     GAAP.........................................................52
     22.10    Usury........................................................52


SCHEDULE A        --       INFORMATION RELATING TO PURCHASERS

SCHEDULE B        --       DEFINED TERMS

SCHEDULE 4.9      --       Changes in Corporate Structure

SCHEDULE 5.3      --       Disclosure Materials

SCHEDULE 5.4      --       Subsidiaries of the Company and Ownership of
                           Subsidiary Stock

SCHEDULE 5.5      --       Financial Statements

SCHEDULE 5.8      --       Certain Litigation

SCHEDULE 5.11     --       Patents, etc.

SCHEDULE 5.12     --       ERISA

SCHEDULE 5.15     --       Existing Debt

SCHEDULE 10.8     --       Certain Agreements by Restricted Subsidiaries

EXHIBIT 1D        --       Form of 7.03% Series D Senior Note due
                           February 15, 2004

EXHIBIT 1E        --       Form of 7.28% Series E Senior Note due
                           February 15, 2009

EXHIBIT 1F        --       Form of 7.43% Series F Senior Note due
                           February 15, 2009

EXHIBIT 4.4(a)    --       Form of Opinion of Special Counsel for the Company

EXHIBIT 4.4(b)    --       Form of Opinion of Special Counsel for the Purchasers

EXHIBIT 4.10      --       Form of Subsidiary Guaranty


<PAGE>


                                  SEITEL, INC.
                            West Building, 7th Floor
                              50 Briar Hollow Lane
                              Houston, Texas 77027


          $20,000,000 7.03% SERIES D SENIOR NOTES DUE FEBRUARY 15, 2004

          $75,000,000 7.28% SERIES E SENIOR NOTES DUE FEBRUARY 15, 2009

         $43,000,000 7.43 % SERIES F SENIOR NOTES DUE FEBRUARY 15, 2009

                                                         As of February 12, 1999

Separately Addressed to each of the
  Purchasers Listed on Schedule A hereto:

Ladies and Gentlemen:

     SEITEL, INC., a Delaware corporation (together with any Person who succeeds
to all, or  substantially  all, of the assets and business of Seitel,  Inc., the
"COMPANY"), agrees with you as follows:

1.   AUTHORIZATION OF NOTES.

     The Company will authorize the issue and sale of

          (a) Twenty Million Dollars ($20,000,000) aggregate principal amount of
     its seven and three  hundredths  percent  (7.03%) Series D Senior Notes due
     February  15,  2004 (the  "SERIES D NOTES,"  such term to include  any such
     notes  issued in  substitution  therefor  pursuant  to  Section  13 of this
     Agreement or the Other Agreements (as hereinafter defined)),

          (b) Seventy-Five  Million Dollars  ($75,000,000)  aggregate  principal
     amount of its seven and  twenty-eight  hundredths  percent (7.28%) Series E
     Senior  Notes due  February  15, 2009 (the  "SERIES E NOTES,"  such term to
     include any such notes issued in substitution  therefor pursuant to Section
     13 of this Agreement or the Other Agreements), and

          (c) Forty-Three  Million  Dollars  ($43,000,000)  aggregate  principal
     amount of its seven and  forty-three  hundredths  percent  (7.43%) Series F
     Senior  Notes due  February  15, 2009 (the  "SERIES F NOTES,"  such term to
     include any such notes issued in substitution  therefor pursuant to Section
     13 of this Agreement or the Other Agreements).


<PAGE>


The Series D Notes shall be substantially in the form set out in Exhibit 1D, the
Series E Notes shall be substantially in the form set out in Exhibit 1E, and the
Series F Notes shall be substantially in the form set out in Exhibit 1F, in each
case,  with such  changes  therefrom,  if any, as may be approved by you and the
Company  (the  Series D Notes,  the  Series E Notes  and the  Series F Notes are
herein  referred to  collectively  as the  "Notes," and each  individually  as a
"NOTE").  Certain  capitalized  terms  used in this  Agreement  are  defined  in
Schedule B;  references to a "Schedule" or an "Exhibit"  are,  unless  otherwise
specified, to a Schedule or an Exhibit attached to this Agreement.

2.   SALE AND PURCHASE OF NOTES.

     Subject to the terms and  conditions  of this  Agreement,  the Company will
issue and sell to you and you will purchase from the Company, in accordance with
the provisions  hereof,  at the Closing  provided for in Section 3, Notes of the
Series and in the principal amounts  specified  opposite your name in Schedule A
at the purchase  price of one hundred  percent  (100%) of the  principal  amount
thereof;  PROVIDED,  HOWEVER, that you may change such information on Schedule A
(other than the aggregate principal amount of your commitment) by written notice
delivered to the Company prior to the Closing  (except that one or more (but not
more than three) of your Affiliates  shall be the purchaser or purchasers of the
principal  amount of the Notes  specified  opposite  your name on  Schedule  A).
Contemporaneously  with  entering into this  Agreement,  the Company is entering
into separate Note Purchase Agreements (the "OTHER  AGREEMENTS")  identical with
this Agreement with each of the other purchasers named in Schedule A (the "OTHER
PURCHASERS"),  providing  for the  sale  at the  Closing  to  each of the  Other
Purchasers  of  Notes  of the  Series  and in the  principal  amounts  specified
opposite its name in Schedule A. Your  obligation  hereunder and the obligations
of the Other  Purchasers  under the Other  Agreements  are several and not joint
obligations  and you shall have no obligation  under any Other  Agreement and no
liability  to any Person for the  performance  or  non-performance  by any Other
Purchaser thereunder.

3.   CLOSING.

     3.1 THE CLOSING.

     The sale and purchase of the Notes to be purchased by the purchasers listed
on  Schedule A hereto  (the  "PURCHASERS")  shall occur at the offices of Hebb &
Gitlin,  One State Street,  Hartford,  Connecticut 06103, at 10:00 a.m., eastern
standard  time, at a closing (the  "CLOSING") on February 12, 1999 (the "CLOSING
DATE").  At the Closing the Company will deliver to each  Purchaser the Notes to
be purchased by it in the form of, respectively,  a single Series D Note, Series
E Note, or Series F Note, as the case may be (or such greater number of Series D
Notes,  Series E Notes,  or  Series F Notes,  in  denominations  of at least One
Hundred  Thousand Dollars  ($100,000) as such Purchaser may request),  dated the
Closing Date and registered in its name (or in the name of its nominee), against
delivery by such Purchaser to the Company or its order of immediately  available
funds  in the  amount  of the  purchase  price  therefor  by  wire  transfer  of
immediately  available  funds for the account of the  Company to account  number
1820760377  AT  BANK  ONE-HOUSTON,  910  TRAVIS,  HOUSTON,  TEXAS  77002,  ABA #
111000614.

     3.2 Failure of the Company to Deliver.

     If on the Closing  Date the Company  fails to tender to you the Notes to be
acquired by you on such date or if the  conditions  specified  in Section 4 have
not been fulfilled to your  satisfaction  on the Closing Date, you may thereupon
elect to be  relieved  of all  further  obligations  under this  Agreement  with
respect  to the  Notes to be  purchased  by you on such  date.  Nothing  in this
Section shall operate to relieve the Company from any of its  obligations  under
this Agreement or to waive any of your rights against the Company.

     3.3 Failure by You to Deliver.

     If on the  Closing  Date you fail to deliver the full amount of funds to be
delivered by you on such date or if the conditions  specified in Section 4A have
not been  fulfilled  on such date,  the  Company may  thereupon  elect to return
immediately  any funds  delivered  by you on such date and to be relieved of all
further  obligations  under  this  Agreement  with  respect  to the  Notes to be
purchased by you on such date. Except as described herein and in accordance with
applicable law, nothing in this Section shall operate to relieve you from any of
your  obligations  to the Company  under this  Agreement  or to waive any of the
Company's rights against you.

4.   YOUR CONDITIONS TO CLOSINGS.

     Your  obligation to purchase and pay for the Notes to be sold to you on the
Closing Date is subject to the fulfillment to your satisfaction,  prior to or on
the Closing Date (except as otherwise specified), of the following conditions:

     4.1 Representations and Warranties.

     The  representations  and warranties of the Company in this Agreement shall
be true and correct when made and on the Closing Date.

     4.2 Performance; No Default.

     The Company  shall have  performed  and complied  with all  agreements  and
conditions contained in this Agreement required to be performed or complied with
by it prior to or on the Closing Date and after  giving  effect to the issue and
sale of the Notes (and the  application of the proceeds  thereof as contemplated
by Schedule  5.14),  no Default or Event of Default  shall have  occurred and be
continuing.

     4.3 Compliance Certificates.

          (a) Officer's Certificate.  The Company shall have delivered to you an
     Officer's  Certificate,   dated  the  Closing  Date,  certifying  that  the
     conditions specified in Sections 4.1 and 4.2 have been fulfilled.


<PAGE>


          (b) Company Secretary's Certificate.  The Company shall have delivered
     to you a certificate, dated the Closing Date, signed by the Secretary or an
     Assistant  Secretary of the Company,  and certifying as to the resolutions,
     the bylaws and the certificate of incorporation  attached thereto and as to
     other corporate  proceedings  relating to the authorization,  execution and
     delivery of the Notes, this Agreement and any other agreement or instrument
     related thereto.

          (c)  Secretary's   Certificates  of  Restricted   Subsidiaries.   Each
     Restricted  Subsidiary shall have delivered to you a certificate  dated the
     Closing  Date  (separately  executed  or  executed  jointly  by one or more
     Restricted Subsidiaries), signed by the Secretary or an Assistant Secretary
     of such Restricted  Subsidiary,  and certifying as to the resolutions,  the
     bylaws and the certificate or articles of  incorporation of such Restricted
     Subsidiary attached thereto and as to other corporate  proceedings relating
     to the authorization,  execution and delivery by such Restricted Subsidiary
     of the Subsidiary Guaranty.

     4.4 Opinions of Counsel.

     You shall have received from

          (a) Gardere Wynne Sewell & Riggs, L.L.P.,  counsel for the Company and
     the Restricted Subsidiaries, and

          (b) Hebb & Gitlin, your special counsel,

closing opinions satisfactory to you in form, scope and substance, each dated as
of the Closing Date, substantially in the respective forms set forth in Exhibits
4.4(a) and 4.4(b),  and opining as to such other  matters as you may  reasonably
request.  This  Section 4.4 shall  constitute  direction  by the Company to such
counsel  named in the  immediately  preceding  subsection  (a) to  deliver  such
closing opinion to you.

     4.5 Purchases Permitted By Applicable Law, etc.

     On the Closing  Date your  purchase of Notes shall (a) be  permitted by the
laws and  regulations  of each  jurisdiction  to which you are subject,  without
recourse to provisions  (such as Section  1405(a)(8)  of the New York  Insurance
Law) permitting limited  investments by insurance  companies without restriction
as to the character of the particular investment, (b) not violate any applicable
law or regulation  (including,  without limitation,  Regulation T, U or X of the
Board of Governors of the Federal Reserve System) and (c) not subject you to any
tax, penalty or liability under or pursuant to any applicable law or regulation,
which law or  regulation  was not in effect on the date hereof.  If requested by
you, you shall have  received an  Officer's  Certificate  certifying  as to such
matters of fact as you may reasonably specify to enable you to determine whether
such purchase is so permitted.

     4.6 Sale of Other Notes.

     Contemporaneously  with the  Closing,  the Company  shall sell to the Other
Purchasers and the Other  Purchasers shall purchase the Notes to be purchased by
them at the Closing as specified in Schedule A.

     4.7 Payment of Special Counsel Fees.

     Without  limiting the  provisions of Section  15.1,  the Company shall have
paid on or before  the  Closing  the fees,  charges  and  disbursements  of your
special  counsel  referred  to in Section  4.4(b) to the extent  reflected  in a
statement of such counsel  rendered to the Company at least one (1) Business Day
prior to the Closing.

     4.8 Private Placement Numbers.

     Private  Placement numbers issued by Standard & Poor's CUSIP Service Bureau
(in cooperation with the Securities Valuation Office of the National Association
of Insurance Commissioners) shall have been obtained for each Series.

     4.9 Changes in Corporate Structure.

     Except as specified in Schedule 4.9, the Company shall not have changed its
jurisdiction of incorporation or been a party to any merger or consolidation and
shall not have succeeded to all or any  substantial  part of the  liabilities of
any other entity,  at any time  following the date of the most recent  financial
statements referred to in Schedule 5.5.

     4.10 Subsidiary Guaranty.

     You shall have received the  Guaranty,  duly executed and delivered by each
Restricted   Subsidiary,   substantially  in  the  form  of  Exhibit  4.10  (the
"SUBSIDIARY  GUARANTY"),  satisfactory  to  you in  form  and  substance,  which
Guaranty shall be in full force and effect.

     4.11 Proceedings and Documents.

     All corporate and other  proceedings  in connection  with the  transactions
contemplated  by this  Agreement and all documents and  instruments  incident to
such  transactions  shall be  reasonably  satisfactory  to you and your  special
counsel,  and  you and  your  special  counsel  shall  have  received  all  such
counterpart  originals or certified or other copies of such  documents as you or
they may reasonably request.

4A.  COMPANY'S CLOSING CONDITIONS.

     The  Company's  obligation  to sell the Notes to be purchased by you on the
Closing Date is subject to the fulfillment to the Company's satisfaction,  prior
to or on the Closing  Date  (except as otherwise  specified),  of the  following
conditions:

     4A.1 REPRESENTATIONS AND WARRANTIES.

     The  representations  and  warranties  made by you in  Section  6 shall  be
correct when made and on the Closing Date.




<PAGE>


     4A.2 SALES PERMITTED BY APPLICABLE LAW, ETC.

     On the Closing Date the Company's sale of the Notes and the granting of the
Subsidiary Guaranty by the Restricted Subsidiaries shall (a) be permitted by the
laws  and  regulations  of  each  jurisdiction  to  which  the  Company  and the
Restricted  Subsidiaries are subject,  and (b) not violate any applicable law or
regulation.

5.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

     The Company represents and warrants to you that:

     5.1 Organization; Power and Authority.

          (a) The Company

               (i) is a corporation duly organized, validly existing and in good
          standing under the laws of the State of Delaware;

               (ii) is duly  qualified as a foreign  corporation  and is in good
          standing in each jurisdiction in which such  qualification is required
          by law, other than those  jurisdictions  as to which the failure to be
          so qualified or in good  standing  could not,  individually  or in the
          aggregate,  reasonably be expected to have a Material  Adverse Effect;
          and

               (iii) has the corporate  power and authority to own or hold under
          lease the  properties  it  purports  to own or hold  under  lease,  to
          transact  the  business it  transacts  and  proposes to  transact,  to
          execute and deliver this  Agreement and the Other  Agreements  and the
          Notes and to perform the provisions hereof and thereof.

          (b) Each Subsidiary

               (i) is a corporation duly organized, validly existing and in good
          standing under the laws of its jurisdiction of incorporation;

               (ii) is duly  qualified as a foreign  corporation  and is in good
          standing in each jurisdiction in which such  qualification is required
          by law, other than those  jurisdictions  as to which the failure to be
          so qualified or in good  standing  could not,  individually  or in the
          aggregate,  reasonably be expected to have a Material  Adverse Effect;
          and

               (iii) has the corporate  power and authority to own or hold under
          lease the  properties  it  purports  to own or hold  under  lease,  to
          transact the business it transacts  and proposes to transact,  and, in
          the case of the  Restricted  Subsidiaries,  to execute and deliver the
          Subsidiary Guaranty and to perform the provisions hereof and thereof.


<PAGE>



     5.2 Authorization, etc.

          (a) This  Agreement and the Other  Agreements  and the Notes have been
     duly  authorized  by all  necessary  corporate  action  on the  part of the
     Company,  and this Agreement  constitutes,  and upon execution and delivery
     thereof each Note will constitute, a legal, valid and binding obligation of
     the Company  enforceable  against the Company in accordance with its terms,
     except as such enforceability may be limited by (i) applicable  bankruptcy,
     insolvency, reorganization,  moratorium or other similar laws affecting the
     enforcement of creditors'  rights generally and (ii) general  principles of
     equity  (regardless  of whether  such  enforceability  is  considered  in a
     proceeding in equity or at law).

          (b) The Subsidiary  Guaranty has been duly authorized by all necessary
     corporate action on the part of each Restricted  Subsidiary and constitutes
     a  legal,  valid  and  binding  obligation  of each  Restricted  Subsidiary
     enforceable  against such  Restricted  Subsidiary  in  accordance  with its
     terms,  except as such  enforceability  may be  limited  by (i)  applicable
     bankruptcy,  insolvency,  reorganization,  moratorium or other similar laws
     affecting the enforcement of creditors'  rights  generally and (ii) general
     principles  of  equity  (regardless  of  whether  such   enforceability  is
     considered in a proceeding in equity or at law).

     5.3 Disclosure.

     The Company,  through its agent,  Prudential Securities  Incorporated,  has
delivered  to you and each  Other  Purchaser  a copy of a  Confidential  Private
Placement  Memorandum,  dated January 1999 (the  "MEMORANDUM"),  relating to the
transactions  contemplated  hereby.  The  Memorandum  fairly  describes,  in all
material respects,  the general nature of the business and principal  properties
of the  Company  and the  Subsidiaries.  This  Agreement,  the  Memorandum,  the
documents,  certificates  or other writings  delivered to you by or on behalf of
the Company in  connection  with the  transactions  contemplated  hereby and the
financial  statements  listed in Schedule 5.5, taken as a whole,  do not contain
any untrue  statement  of a  material  fact or omit to state any  material  fact
necessary  to make  the  statements  therein  not  misleading  in  light  of the
circumstances  under which they were made. All projections  and  forward-looking
statements  contained  in the  Memorandum  are based upon  assumptions  that the
Company  believes  to be  reasonable  and were made in good  faith,  although no
assurances  can be given  that the  results  set  forth in such  projections  or
forward-looking  statements  will  be  achieved.  Except  as  disclosed  in  the
Memorandum or in the financial statements listed in Schedule 5.5, since December
31,  1997,  there  has been no change in the  financial  condition,  operations,
business,  properties  or  prospects  of the  Company or any  Subsidiary  except
changes that  individually  or in the aggregate could not reasonably be expected
to have a Material  Adverse  Effect.  There is no fact known to the Company that
could reasonably be expected to have a Material Adverse Effect that has not been
set forth herein or in the  Memorandum or in the other  documents,  certificates
and other writings delivered to you by or on behalf of the Company  specifically
for use in connection with the transactions contemplated hereby.

     5.4 Organization and Ownership of Shares of Subsidiaries; Affiliates.

          (a)  Schedule  5.4  contains  (except as noted  therein)  complete and
     correct lists of (i) the Subsidiaries,  showing, as to each Subsidiary, the
     correct  name  thereof,  the  jurisdiction  of  its  organization  and  the
     percentage  of shares of each  class of its  outstanding  capital  stock or
     similar equity  interests  owned by the Company and each other  Subsidiary,
     and  whether  such  Subsidiary  is a  Restricted  Subsidiary,  and (ii) the
     Company's Affiliates (other than Subsidiaries).

          (b) All of the  outstanding  shares of capital stock or similar equity
     interests  of each  Subsidiary  shown in Schedule 5.4 as being owned by the
     Company and the Subsidiaries  have been duly authorized and validly issued,
     are fully paid and  nonassessable  and are owned by the  Company or another
     Subsidiary  free and clear of any Lien  (except as  otherwise  disclosed in
     Schedule 5.4).

          (c) Each  Subsidiary  identified in Schedule 5.4 is a  corporation  or
     other legal entity duly  organized,  validly  existing and in good standing
     under the laws of its jurisdiction of  organization,  and is duly qualified
     as a foreign  corporation  or other legal entity and is in good standing in
     each  jurisdiction  in which such  qualification  is required by law, other
     than those  jurisdictions  as to which the failure to be so qualified or in
     good standing could not,  individually  or in the aggregate,  reasonably be
     expected to have a Material  Adverse  Effect.  Each such Subsidiary has the
     corporate  or other  power and  authority  to own or hold  under  lease the
     properties  it  purports  to own or hold under  lease and to  transact  the
     business it transacts and proposes to transact.

          (d) No Restricted  Subsidiary  is a party to, or otherwise  subject to
     any legal  restriction  or any agreement  (other than this  Agreement,  the
     agreements  listed on Schedule  5.4 and  customary  limitations  imposed by
     corporate  law  statutes)   restricting  the  ability  of  such  Restricted
     Subsidiary  to pay  dividends  out of  profits  or make any  other  similar
     distributions   of  profits  to  the  Company  or  any  of  the  Restricted
     Subsidiaries  that owns  outstanding  shares of  capital  stock or  similar
     equity interests of such Restricted Subsidiary.

     5.5 Financial Statements.

     The  Company  has  delivered  to each  Purchaser  copies  of the  financial
statements  of the Company and the  Subsidiaries  listed on Schedule 5.5. All of
said  financial  statements  (including  in each case the related  schedules and
notes) present fairly,  in all material  respects,  the  consolidated  financial
position  of  the  Company  and  the  Subsidiaries  as of the  respective  dates
specified in such Schedule and the consolidated  results of their operations and
cash flows for the  respective  periods so specified  and have been  prepared in
accordance with GAAP consistently applied throughout the periods involved except
as set forth in the notes thereto (subject, in the case of any interim financial
statements, to normal year-end adjustments).


<PAGE>



     5.6 Compliance with Laws, Other Instruments, etc.

     Neither the  execution,  delivery  and  performance  by the Company of this
Agreement and the Notes,  nor the  execution,  delivery and  performance  by any
Restricted Subsidiary of the Subsidiary Guaranty, will (a) contravene, result in
any breach of, or constitute a default  under,  or result in the creation of any
Lien in respect of any  property  of the  Company or any  Restricted  Subsidiary
under,  any  indenture,  mortgage,  deed of  trust,  loan,  purchase  or  credit
agreement,  lease,  corporate  charter or  by-laws,  or any other  agreement  or
instrument  to which the  Company or any  Restricted  Subsidiary  is bound or by
which  the  Company  or any  Restricted  Subsidiary  or any of their  respective
properties may be bound or affected,  (b) conflict with or result in a breach of
any of the terms,  conditions or provisions of any order,  judgment,  decree, or
ruling of any court,  arbitrator  or  Governmental  Authority  applicable to the
Company or any Restricted Subsidiary or (c) violate any provision of any statute
or other rule or  regulation  of any  Governmental  Authority  applicable to the
Company or any Restricted Subsidiary.

     5.7 Governmental Authorizations, etc.

     No  consent,  approval  or  authorization  of, or  registration,  filing or
declaration with, any Governmental  Authority is required in connection with the
execution,  delivery or performance  (a) by the Company of this Agreement or the
Notes or (b) by any Restricted Subsidiary of the Subsidiary Guaranty.

     5.8 Litigation; Observance of Agreements, Statutes and Orders.

          (a) Except as disclosed in Schedule 5.8,  there are no actions,  suits
     or  proceedings  pending or, to the  knowledge of the  Company,  threatened
     against or affecting  the Company or any  Subsidiary or any property of the
     Company or any Subsidiary in any court or before any arbitrator of any kind
     or before or by any  Governmental  Authority  that,  individually or in the
     aggregate, could reasonably be expected to have a Material Adverse Effect.

          (b) Neither the Company  nor any  Subsidiary  is in default  under any
     term of any  agreement or  instrument to which it is a party or by which it
     is bound, or any order, judgment, decree or ruling of any court, arbitrator
     or  Governmental  Authority  or is in  violation  of  any  applicable  law,
     ordinance,  rule or regulation (including without limitation  Environmental
     Laws)  of  any   Governmental   Authority,   which  default  or  violation,
     individually  or in the aggregate,  could  reasonably be expected to have a
     Material Adverse Effect.


<PAGE>


     5.9 Taxes.

     The  Company  and the  Subsidiaries  have  filed all tax  returns  that are
required to have been filed in any  jurisdiction,  and have paid all taxes shown
to be due and payable on such returns and all other taxes and assessments levied
upon them or their properties,  assets, income or franchises, to the extent such
taxes and  assessments  have  become due and payable and before they have become
delinquent,  except for any taxes and assessments (a) the amount of which is not
individually or in the aggregate  Material or (b) the amount,  applicability  or
validity of which is  currently  being  contested  in good faith by  appropriate
proceedings  and with respect to which the Company or a Subsidiary,  as the case
may be, has established  adequate  reserves in accordance with GAAP. The Company
knows of no basis for any other  tax or  assessment  that  could  reasonably  be
expected to have a Material Adverse Effect.  The charges,  accruals and reserves
on the books of the Company and the Subsidiaries in respect of Federal, state or
other  taxes for all  fiscal  periods  are  adequate.  The  Federal  income  tax
liabilities  of the Company and the  Subsidiaries  have been  determined  by the
Internal  Revenue  Service and paid for all fiscal years up to and including the
fiscal year ended December 31, 1996.

     5.10 Title to Property; Leases.

     The Company and the  Subsidiaries  have good and sufficient  title to their
respective  properties  that  individually  or in the  aggregate  are  Material,
including all such properties reflected in the most recent audited balance sheet
referred to in Section 5.5 or purported to have been  acquired by the Company or
any Subsidiary  after said date (except as sold or otherwise  disposed of in the
ordinary course of business), in each case free and clear of Liens prohibited by
this  Agreement.  All leases that  individually or in the aggregate are Material
are valid  and  subsisting  and are in full  force  and  effect in all  material
respects.

     5.11 Licenses, Permits, etc.

     Except as disclosed in Schedule 5.11,

          (a) the Company  and the  Subsidiaries  own or possess  all  licenses,
     permits, franchises,  authorizations,  patents, copyrights,  service marks,
     trademarks and trade names, or rights thereto, with respect to the business
     of  the  Company  and/or  any  Subsidiary  as  currently  conducted,   that
     individually or in the aggregate are Material,  without known conflict with
     the rights of others;

          (b) to the best knowledge of the Company, no product of the Company or
     any Subsidiary infringes in any material respect upon any license,  permit,
     franchise, authorization, patent, copyright, service mark, trademark, trade
     name or other right owned by any other Person; and

          (c) to the best knowledge of the Company, there is no violation by any
     Person of any right of the Company or any  Subsidiary  with  respect to any
     patent, copyright, service mark, trademark, trade name or other right owned
     or used by the  Company or any  Subsidiary  which,  individually  or in the
     aggregate, could reasonably be expected to have a Material Adverse Effect.

     5.12 Compliance with ERISA.


<PAGE>


          (a)  The  Company  and  each  ERISA   Affiliate   have   operated  and
     administered  each Plan in compliance  with all applicable  laws except for
     such  instances  of  noncompliance  as have not  resulted  in and could not
     reasonably be expected to result in a Material Adverse Effect.  Neither the
     Company nor any ERISA  Affiliate  has  incurred any  liability  pursuant to
     Title I or IV of ERISA or the penalty or excise tax  provisions of the Code
     relating to employee benefit plans (as defined in Section 3 of ERISA),  and
     no event,  transaction  or  condition  has  occurred  or exists  that could
     reasonably be expected to result in the incurrence of any such liability by
     the Company or any ERISA Affiliate, or in the imposition of any Lien on any
     of the rights,  properties or assets of the Company or any ERISA Affiliate,
     in either  case  pursuant  to Title I or IV of ERISA or to such  penalty or
     excise tax  provisions or to Section  401(a)(29) or 412 of the Code,  other
     than  such  liabilities  or Liens as would  not be  individually  or in the
     aggregate Material.

          (b) The present value of the aggregate benefit  liabilities under each
     of the Plans (other than Multiemployer Plans),  determined as of the end of
     such Plan's  most  recently  ended plan year on the basis of the  actuarial
     assumptions  specified  for  funding  purposes  in such  Plan's most recent
     actuarial  valuation report,  did not exceed the aggregate current value of
     the assets of such Plan  allocable  to such benefit  liabilities.  The term
     "BENEFIT  LIABILITIES"  has the meaning  specified in section 4001 of ERISA
     and the  terms  "CURRENT  VALUE"  and  "PRESENT  VALUE"  have  the  meaning
     specified in section 3 of ERISA.

          (c) The Company and its ERISA Affiliates have not incurred  withdrawal
     liabilities  (and are not  subject to  contingent  withdrawal  liabilities)
     under section 4201 or 4204 of ERISA in respect of Multiemployer  Plans that
     individually or in the aggregate are Material.

          (d) The expected  postretirement  benefit obligation (determined as of
     the last day of the Company's most recently ended fiscal year in accordance
     with Financial Accounting Standards Board Statement No. 106, without regard
     to liabilities  attributable to continuation  coverage  mandated by section
     4980B of the Code) of the Company and the  Restricted  Subsidiaries  is not
     Material.

          (e) The execution and delivery of this  Agreement and the issuance and
     sale of the  Notes  hereunder  will not  involve  any  transaction  that is
     subject to the  prohibitions  of section 406 of ERISA or in connection with
     which a tax could be imposed pursuant to section  4975(c)(1)(A)-(D)  of the
     Code.  The  representation  by the  Company in the first  sentence  of this
     Section  5.12(e) is made in reliance  upon and  subject to the  accuracy of
     your  representation  in Section 6.3 as to the sources of the funds used to
     pay the purchase price of the Notes to be purchased by you.

          (f) Schedule 5.12 lists all ERISA Affiliates that are Subsidiaries and
     that maintain one or more Plans and any employee  organizations  in respect
     of any  Multiemployer  Plan or Plan.  Schedule  5.12  sets  forth all ERISA
     Affiliates  and all  "employee  benefit  plans"  with  respect to which the
     Company or any  "affiliate" of the Company is a  "party-in-interest"  or in
     respect  of  which  the  Notes  could  constitute  an  "employer  security"
     ("employee benefit plan,"  "party-in-interest"  and "employee organization"
     have the  meanings  specified  in section 3 of ERISA,  "affiliate"  has the
     meaning  specified  in  section  407(d)  of  ERISA  and  Section  V of  the
     Department of Labor  Prohibited  Transaction  Exemption 95-60 (60 FR 35925,
     July 12, 1995) and "employer security" has the meaning specified in section
     407(d) of ERISA).


<PAGE>



     5.13 Private Offering by the Company.

     Neither the  Company nor anyone  acting on its behalf has offered the Notes
or any similar  Securities for sale to, or solicited any offer to buy any of the
same from, or otherwise  approached or negotiated in respect  thereof with,  any
Person other than you, the Other  Purchasers and not more than  seventy-two (72)
other  Institutional  Investors,  each of which has been  offered the Notes at a
private sale for investment  pursuant to a valid exemption from the registration
requirements  of Section 5 of the Securities  Act. In reliance upon the accuracy
of your representations and warranties and the representations and warranties of
the Other  Purchasers,  neither the Company nor anyone  acting on its behalf has
taken,  or will take,  any action that would subject the issuance or sale of the
Notes to the registration requirements of Section 5 of the Securities Act.

     5.14 Use of Proceeds; Margin Regulations.

     The Company  will apply the  proceeds of the sale of the Notes to refinance
existing Debt and to fund capital  expenditures  primarily  associated  with the
acquisition of seismic data and  investment in working  interests of exploration
and  production  projects.  No part of the  proceeds  from the sale of the Notes
hereunder  will be used,  directly or  indirectly,  for the purpose of buying or
carrying  any margin  stock  within the meaning of  Regulation U of the Board of
Governors  of the  Federal  Reserve  System (12 CFR 221),  or for the purpose of
buying or carrying or trading in any Securities  under such  circumstances as to
involve the Company in a violation of Regulation X of said Board (12 CFR 224) or
to involve any broker or dealer in a violation of Regulation T of said Board (12
CFR 220).  Margin  stock does not  constitute  more than one percent (1%) of the
value of the  consolidated  assets of the Company and the  Subsidiaries  and the
Company does not have any present  intention  that margin stock will  constitute
more  than  five  percent  (5%) of the  value  of such  assets.  As used in this
Section, the terms "MARGIN STOCK" and "PURPOSE OF BUYING OR CARRYING" shall have
the meanings assigned to them in said Regulation U.

     5.15 Existing Debt; Future Liens.

          (a) Except as described  therein,  Schedule 5.15 sets forth a complete
     and  correct  list  of  all   outstanding   Debt  (in  excess  of  $100,000
     outstanding)  of the Company and the  Subsidiaries as of February 10, 1999,
     since which date there has been no material change in the amounts, interest
     rates, sinking funds, installment payments or maturities of the Debt of the
     Company or the  Subsidiaries.  Neither  the Company  nor  Subsidiary  is in
     default, and no waiver of default is currently in effect, in the payment of
     any principal of or interest on any Debt of the Company or such  Subsidiary
     and no event or condition exists with respect to any Debt of the Company or
     any Subsidiary that would permit (or that with notice or the lapse of time,
     or both, would permit) one or more Persons to cause such Debt to become due
     and payable  before its stated  maturity or before its regularly  scheduled
     dates of payment.


<PAGE>


          (b) Except as disclosed in Schedule 5.15,  neither the Company nor any
     Restricted  Subsidiary  has agreed or  consented  to cause or permit in the
     future  (upon the  happening  of a  contingency  or  otherwise)  any of its
     property,  whether now owned or hereafter acquired, to be subject to a Lien
     not permitted by Section 10.4.

     5.16 Foreign Assets Control Regulations, etc.

     Neither the sale of the Notes by the Company  hereunder  nor its use of the
proceeds thereof will violate the Trading with the Enemy Act, as amended, or any
of the  foreign  assets  control  regulations  of  the  United  States  Treasury
Department  (31  CFR,  Subtitle  B,  Chapter  V,  as  amended)  or any  enabling
legislation or executive order relating thereto.

     5.17 Status under Certain Statutes.

     Neither the Company nor any  Subsidiary is subject to regulation  under the
Investment  Company Act of 1940, as amended,  the Public Utility Holding Company
Act of 1935, as amended, the Transportation Acts (49 U.S.C.), as amended, or the
Federal Power Act, as amended.

     5.18 Environmental Matters.

     Neither the Company nor any  Subsidiary  has  knowledge of any claim or has
received any notice of any claim,  and no action or  proceeding  of any kind has
been instituted raising any claim against the Company or any of the Subsidiaries
or any of their  respective  real  properties now or formerly  owned,  leased or
operated by any of them or other assets,  alleging any damage to the environment
or violation of any Environmental  Laws, except, in each case, such as could not
reasonably  be  expected  to  result in a  Material  Adverse  Effect.  Except as
otherwise disclosed to you in writing,

          (a) neither the Company nor any of the  Subsidiaries  has knowledge of
     any facts  which  would  give rise to any  claim,  public  or  private,  of
     violation  of  Environmental  Laws or damage to the  environment  emanating
     from, occurring on or in any way related to real properties now or formerly
     owned,  leased or operated by any of them or to other  assets or their use,
     except, in each case, such as could not reasonably be expected to result in
     a Material Adverse Effect;

          (b) neither the  Company  nor any of the  Subsidiaries  has stored any
     Hazardous  Materials on real  properties now or formerly  owned,  leased or
     operated by any of them or has  disposed of any  Hazardous  Materials  in a
     manner contrary to any  Environmental  Laws in each case in any manner that
     could reasonably be expected to result in a Material Adverse Effect; and

          (c) all buildings on all real properties now owned, leased or operated
     by the Company or any of the Subsidiaries are in compliance with applicable
     Environmental  Laws, except where failure to comply could not reasonably be
     expected to result in a Material Adverse Effect.

     5.19 Year 2000 Problem.


<PAGE>


     The  Company and the  Subsidiaries  are  implementing  measures to have all
critical business and computer systems Year 2000 Compliant and Ready in a timely
manner and the advent of the year 2000 and its impact on said critical  business
and  computer  systems are not  reasonably  expected to have a Material  Adverse
Effect.

6.   REPRESENTATIONS OF THE PURCHASER.

     6.1 PURCHASE FOR INVESTMENT

     You represent that you are purchasing the Notes for your own account or for
one or more  separate  accounts  maintained  by you or for the account of one or
more pension or trust funds and not with a view to the  distribution  thereof or
with  any  present  intention  of  offering  or  selling  any of the  Notes in a
transaction  that would violate the Securities Act or the securities laws of any
State of the United States or any other applicable  jurisdiction,  PROVIDED that
the  disposition  of your or their property shall at all times be within your or
their  control.  You  represent  and  warrant  that you and any Person for whose
account you are purchasing the Notes are either a Qualified  Institutional Buyer
or an Accredited Institution,  in either case with such knowledge and experience
in  financial  and  business  matters as are  necessary in order to evaluate the
merits and risks of an investment  in the Notes.  You also  understand  that the
Company  and,  for  purposes of the  opinions to be delivered to you pursuant to
Section 4.4, counsel to the Company and your special counsel, will rely upon the
accuracy and truth of the foregoing  representations  and you hereby  consent to
such reliance.  You understand that the Notes have not been registered under the
Securities  Act and may be resold only if registered  pursuant to the provisions
of the Securities Act or if an exemption from registration is available,  except
under  circumstances  where neither such  registration  nor such an exemption is
required by law, and that the Company is not required to register the Notes.

     6.2 Legend.

     You agree that the Notes shall contain the following legend:

     "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
     AMENDED,  AND MAY  ONLY  BE  REOFFERED  AND  SOLD IN  COMPLIANCE  WITH  THE
     REGISTRATION PROVISIONS OF SUCH ACT OR PURSUANT TO AN EXEMPTION THEREFROM."

The legend requirements imposed by this Section 6.2 shall cease and terminate as
to any particular Note if the Notes represented thereby have been:

          (a)  effectively  registered  under the  Securities  Act (the  Company
     having no obligation to effect the registration of such Notes) and disposed
     of in accordance with the registration statement covering such Notes,

          (b)  distributed to the public  pursuant to Rule 144 (or any successor
     provision) under the Securities Act, or


<PAGE>


          (c) otherwise  transferred  in accordance  herewith and the subsequent
     disposition   of  such  Notes  shall  not  require  the   registration   or
     qualification  of such Notes under the  Securities Act or any similar state
     law then in force.

Whenever such  restrictions  shall terminate as to any Notes, the holder thereof
shall be entitled to receive  from the Company,  without  expense to such holder
(except for stamp taxes or governmental  charges,  if any, payable in connection
with a transfer of such Notes,  as required by Section 13.2), a new Note of like
tenor not bearing the legend set forth in this Section 6.2.

     6.2 ERISA.

     You represent:

          (a) if you are  acquiring  the Notes for your own  account  with funds
     from or  attributable  to your general  account,  and in reliance  upon the
     Company's  representations  set  forth  in  Section  5.12  and the  related
     disclosures set forth in Schedule 5.12, that the amount of the reserves and
     liabilities  for the general  account  contracts  (as defined by the annual
     statement for life insurance companies approved by the National Association
     of Insurance  Commissioners  (the "NAIC ANNUAL  STATEMENT"))  held by or on
     behalf of any Plan together with the amount of the reserves and liabilities
     for the general  account  contracts held by or on behalf of any other Plans
     maintained  by the same  employer (or  affiliate  thereof,  as such term is
     defined in section V of DOL Prohibited  Transaction  Exemption 95-60 (60 FR
     35925, July 12, 1995)) or by the same employee  organization (as defined in
     ERISA) in the general  account do not exceed 10% of the total  reserves and
     liabilities  of  the  general  account   (exclusive  of  separate   account
     liabilities)  PLUS surplus as set forth in the NAIC Annual  Statement filed
     with the state of domicile of the  insurance  company;  for purposes of the
     percentage  limitation  in this  clause  (a),  the amount of  reserves  and
     liabilities  for the general  account  contracts  held by or on behalf of a
     Plan shall be  determined  before  reduction  for credits on account of any
     reinsurance ceded on a coinsurance basis; or

          (b) if any part of the funds being used by you to  purchase  the Notes
     shall come from assets of an employee benefit plan (as defined in section 3
     of ERISA) or a plan (as defined in section 4975(e)(1) of the Code), that:

               (i) if such funds are  attributable  to a "separate  account" (as
          defined in section 3 of ERISA), then

                    (A) all  requirements  for an exemption under DOL Prohibited
               Transaction Exemption 90-1 (issued January 29, 1990) are met with
               respect to the use of such funds to purchase the Notes, or

                    (B) the  employee  benefit  plans with an  interest  in such
               separate  account have been identified in a writing  delivered by
               you to the Company;


<PAGE>


               (ii) if such funds are  attributable to a "separate  account" (as
          defined in section 3 of ERISA) that is maintained solely in connection
          with fixed contracted obligations of an insurance company, any amounts
          payable, or credited,  to any employee benefit plan having an interest
          in such account and to any  participant  or  beneficiary  of such plan
          (including  an  annuitant)  are  not  affected  in any  manner  by the
          investment performance of the separate account;

               (iii) if such  funds are  attributable  to an  "investment  fund"
          managed by a "qualified plan asset manager" (as such terms are defined
          in Part V of DOL Prohibited  Transaction Exemption 84-14, issued March
          13, 1984),  all requirements for an exemption under such Exemption are
          met with respect to the use of such funds to purchase the Notes; or

               (iv) such employee  benefit plan is excluded from the  provisions
          of section 406 of ERISA by virtue of section 4(b) of ERISA.

     6.4 Organization; Power and Authority; Compliance with Laws.

     You represent and warrant that:

          (a) you are a corporation  duly organized,  validly  existing,  and in
     good standing under the laws of the state of your incorporation,

          (b) you have the corporate  power and authority to execute and deliver
     this Agreement and to perform the provisions hereof, and

          (c) the execution,  delivery and  performance of this Agreement by you
     will not violate any  provision of any statute or other rule or  regulation
     of any Governmental Authority applicable to you.

     6.5 Authorization, etc.

     You represent and warrant that this  Agreement has been duly  authorized by
all necessary corporate action on your part, and this Agreement constitutes your
legal, valid and binding obligation  enforceable  against you in accordance with
its  terms,  except as such  enforceability  may be  limited  by (a)  applicable
bankruptcy,  insolvency,  reorganization,   moratorium  or  other  similar  laws
affecting  the  enforcement  of  creditors'  rights  generally  and (b)  general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

7.   INFORMATION AS TO COMPANY.

     7.1 FINANCIAL AND BUSINESS INFORMATION.

     The Company shall deliver to each holder that is an Institutional Investor:


<PAGE>


          (a) Quarterly  Statements -- within forty-five (45) days after the end
     of each  quarterly  fiscal period in each fiscal year of the Company (other
     than the last quarterly fiscal period of each such fiscal year),  duplicate
     copies of,

               (i)   consolidated   balance   sheets  of  the  Company  and  its
          consolidated  Subsidiaries,  and of the  Company  and  its  Restricted
          Subsidiaries, as at the end of such quarter, and

               (ii) consolidated statements of operations,  stockholders' equity
          and cash flows of the Company and its consolidated  Subsidiaries,  and
          of the Company and its Restricted  Subsidiaries,  for such quarter and
          (in the case of the second and third  quarters) for the portion of the
          fiscal year ending with such quarter,

setting forth in each case in comparative form the figures for the corresponding
periods in the  previous  fiscal year,  all in  reasonable  detail,  prepared in
accordance with GAAP applicable to quarterly financial statements generally, and
certified by a Senior Financial  Officer as fairly  presenting,  in all material
respects,  the financial  position of the companies  being reported on and their
results of operations and cash flows, subject to changes resulting from year-end
adjustments,  PROVIDED  that,  so  long  as  the  Company  shall  not  have  any
Unrestricted  Subsidiaries,  delivery within the time period  specified above of
copies of the  Company's  Quarterly  Report on Form 10-Q  prepared in compliance
with the  requirements  therefor  and filed  with the  Securities  and  Exchange
Commission shall be deemed to satisfy the requirements of this Section 7.1(a);

          (b) Annual Statements -- within ninety (90) days after the end of each
     fiscal year of the Company, duplicate copies of,

               (i)  a  consolidated   balance  sheet  of  the  Company  and  its
          consolidated Subsidiaries as at the end of such year,

               (ii) consolidated statements of operations,  stockholders' equity
          and cash flows of the Company and its  consolidated  Subsidiaries  for
          such year, and

               (iii) a condensed  consolidating  balance  sheet,  and  condensed
          consolidating  statements of operations  and cash flows of the Company
          and  its  Subsidiaries  setting  forth,  in each  case,  consolidating
          information  sufficient to show the financial  position and results of
          operations   and  cash  flows  of  the  Company  and  the   Restricted
          Subsidiaries,

setting  forth in each case in  comparative  form the figures  for the  previous
fiscal year,  all in reasonable  detail,  prepared in accordance  with GAAP, and
accompanied by


<PAGE>


                    (A) in the case of the  financial  statements  identified in
               the  foregoing  clauses  (i) and  (ii),  an  opinion  thereon  of
               independent  certified public accountants of recognized  national
               standing,   which  opinion   shall  state  that  such   financial
               statements  present  fairly,  in  all  material   respects,   the
               financial position of the companies being reported upon and their
               results of  operations  and cash flows and have been  prepared in
               conformity   with  GAAP,   and  that  the   examination  of  such
               accountants in connection with such financial statements has been
               made in accordance with generally  accepted  auditing  standards,
               and that such audit provides a reasonable  basis for such opinion
               in the circumstances, and

                    (B) a certificate of such accountants stating that they have
               reviewed this Agreement and stating  further  whether,  in making
               their  audit,  they have become  aware of any  condition or event
               that then  constitutes a Default or an Event of Default,  and, if
               they are aware  that any such  condition  or event  then  exists,
               specifying  the nature and period of the  existence  thereof  (it
               being  understood  that such  accountants  shall  not be  liable,
               directly or  indirectly,  for any failure to obtain  knowledge of
               any Default or Event of Default  unless such  accountants  should
               have obtained  knowledge thereof in making an audit in accordance
               with generally  accepted auditing  standards or did not make such
               an audit),

PROVIDED  that,  so  long  as  the  Company  shall  not  have  any  Unrestricted
Subsidiaries,  the  delivery  within  the  time  period  specified  above of the
Company's  Annual  Report on Form 10-K for such fiscal year  (together  with the
Company's annual report to shareholders, if any, prepared pursuant to Rule 14a-3
under the Exchange Act) prepared in accordance  with the  requirements  therefor
and  filed  with the  Securities  and  Exchange  Commission,  together  with the
accountants'  certificates  described  in clauses  (A) and (B)  above,  shall be
deemed to satisfy the requirements of this Section 7.1(b);

          (c) SEC and Other Reports -- promptly upon their  becoming  available,
     one copy of

               (i) each financial statement,  report,  notice or proxy statement
          sent by the Company or any Restricted  Subsidiary to public securities
          holders generally, and

               (ii) (A) each  regular  or  periodic  report,  each  registration
          statement  (without  exhibits  except as  expressly  requested by such
          holder),  and each prospectus and all amendments  thereto filed by the
          Company or any Restricted  Subsidiary with the Securities and Exchange
          Commission; and

                    (B)  by  facsimile   only,  all  press  releases  and  other
               statements  made  available  generally  by  the  Company  or  any
               Restricted Subsidiary to the public concerning  developments that
               are Material;

          (d) Audit Reports - as soon as  practicable  after receipt  thereof by
     the Company or any Subsidiary, a copy of each other report submitted to the
     Company or any Subsidiary by its independent accountants in connection with
     any  interim or special  audit made by them of the books of the  Company or
     any Subsidiary;


<PAGE>



          (e)  Litigation  -- within  five (5) days  after the  Company  obtains
     knowledge thereof, written notice of any pending or threatened (in writing)
     (i)  litigation  not fully covered by insurance or as to which an insurance
     company has not accepted liability or (ii) governmental proceeding, in each
     case against the Company or any Restricted Subsidiary, in which the damages
     sought  exceed One Million  Dollars  ($1,000,000),  individually  or in the
     aggregate,  or which  otherwise  could  reasonably  be  expected  to have a
     Material Adverse Effect;

          (f) Notice of Default  or Event of  Default  --  promptly,  and in any
     event within five (5) days after a  Responsible  Officer shall become aware
     of the  existence of any Default or Event of Default or that any Person has
     given any notice or taken any  action  with  respect  to a claimed  default
     hereunder  or that any Person has given any notice or taken any action with
     respect to a claimed  default of the type referred to in Section  11(f),  a
     written notice  specifying  the nature and period of existence  thereof and
     what action the Company is taking or proposes to take with respect thereto;

          (g) Oil and Gas Reserve Reports -- promptly, and in any event no later
     than  April 1 in each  year,  engineering  reports  in form  and  substance
     reasonably  satisfactory to the Required  Holders,  certified by Forrest A.
     Garb & Associates,  Inc. (or any other nationally or regionally  recognized
     independent  consulting  petroleum  engineers)  as  fairly  and  accurately
     setting forth

               (i)  the  proven  and  producing,   shut-in,   behind-pipe,   and
          undeveloped  oil and gas reserves  (separately  classified as such) of
          the Company  and its  Restricted  Subsidiaries  as of January 1 of the
          year for which such reserve reports are furnished,

               (ii) the  aggregate  present  value of the future net income with
          respect  to such  reserves  discounted  at a stated  PER ANNUM  annual
          discount rate,

               (iii) projections of the annual rate of production, gross income,
          and net income with respect to such proven and producing reserves, and

               (iv) information with respect to the "take-or-pay," "prepayment,"
          and  gas-balancing  liabilities  of the  Company  and  its  Restricted
          Subsidiaries;

          (h) ERISA  Matters -- promptly,  and in any event within five (5) days
     after a Responsible  Officer shall become aware of any of the following,  a
     written  notice  setting forth the nature  thereof and the action,  if any,
     that the  Company  or an ERISA  Affiliate  proposes  to take  with  respect
     thereto:

               (i) with respect to any Plan, any reportable event, as defined in
          section  4043(b) of ERISA and the  regulations  thereunder,  for which
          notice thereof has not been waived pursuant to such  regulations as in
          effect on the date hereof; or


<PAGE>


               (ii)  the  taking  by the  PBGC of  steps  to  institute,  or the
          threatening  by the  PBGC of the  institution  of,  proceedings  under
          section 4042 of ERISA for the  termination of, or the appointment of a
          trustee to administer,  any Plan, or the receipt by the Company or any
          ERISA Affiliate of a notice from a Multiemployer Plan that such action
          has been taken by the PBGC with respect to such Multiemployer Plan; or

               (iii) any event,  transaction  or condition  that could result in
          the incurrence of any liability by the Company or any ERISA  Affiliate
          pursuant  to Title I or IV of  ERISA  or the  penalty  or  excise  tax
          provisions of the Code relating to employee  benefit plans,  or in the
          imposition  of any Lien on any of the rights,  properties or assets of
          the Company or any ERISA Affiliate  pursuant to Title I or IV of ERISA
          or such penalty or excise tax  provisions,  if such liability or Lien,
          taken together with any other such liabilities or Liens then existing,
          could reasonably be expected to have a Material Adverse Effect;

          (i) Notices from Governmental  Authority -- promptly, and in any event
     within  thirty  (30) days of receipt  thereof,  copies of any notice to the
     Company or any Subsidiary from any Federal or state Governmental  Authority
     relating  to any order,  ruling,  statute or other law or  regulation  that
     could reasonably be expected to have a Material Adverse Effect; and

          (j) Audited Financial  Statements for Restricted Group -- with respect
     to any  fiscal  year of the  Company  as to  which  both  of the  following
     conditions would be satisfied:

               (i) the assets of all Unrestricted Subsidiaries,  determined on a
          combined  basis  as of the last day of such  year,  exceed  20% of the
          consolidated   total  assets  of  the  Company  and  its  consolidated
          Subsidiaries, and

               (ii) the revenues of all Unrestricted Subsidiaries, determined on
          a combined basis for such fiscal year,  exceed 20% of the consolidated
          revenues of the Company and its consolidated Subsidiaries,

upon the written  request of the Required  Holders,  the Company will deliver to
each holder that is an Institutional  Investor the same financial statements and
opinion  with  respect to the  Company  and its  Restricted  Subsidiaries  as is
provided  pursuant to clauses (i) and (ii) of Section 7.1(b) with respect to the
Company and its  consolidated  Subsidiaries  (such  delivery to be made no later
than the  later of (x) the time  delivery  is made of the  financial  statements
referred  to in such  clauses,  if such  request is made at least 60 days before
such time, or (y) 60 days after such request is made).

          (k) Requested  Information -- with reasonable  promptness,  such other
     data  and  information  relating  to  the  business,  operations,  affairs,
     financial  condition,  assets or  properties  of the  Company or any of the
     Restricted  Subsidiaries   (including,   without  limitation,   information
     regarding the impact of the  occurrence of the year 2000 on the Company and
     the  Restricted  Subsidiaries  and plans of the Company to address any such
     impact)  or  relating  to  the  ability  of  the  Company  to  perform  its
     obligations  hereunder  and  under  the  Notes as from  time to time may be
     reasonably  requested  by any such holder  including,  without  limitation,
     information required by 17 C.F.R.ss.230.144A, as amended from time to time.


<PAGE>



     7.2 Officer's Certificate.

     Each set of financial  statements delivered to a holder pursuant to Section
7.1(a) or Section  7.1(b)  hereof shall be  accompanied  by a  certificate  of a
Senior Financial Officer setting forth:

          (a)  Covenant  Compliance  --  the  information   (including  detailed
     calculations)  required  in order to  establish  whether the Company was in
     compliance with the requirements of Sections 10.1 through 10.7,  inclusive,
     during the quarterly or annual period covered by the statements  then being
     furnished  (including with respect to each such Section,  where applicable,
     the calculations of the maximum or minimum amount, ratio or percentage,  as
     the case may be,  permissible  under  the terms of such  Sections,  and the
     calculation of the amount, ratio or percentage then in existence); and

          (b) Event of Default -- a statement that such officer has reviewed the
     relevant terms hereof and has made, or caused to be made,  under his or her
     supervision, a review of the transactions and conditions of the Company and
     the  Subsidiaries  from the  beginning of the  quarterly  or annual  period
     covered  by  the  statements  then  being  furnished  to  the  date  of the
     certificate  and that such review shall not have  disclosed  the  existence
     during such period of any condition or event that  constitutes a Default or
     an Event of Default or, if any such  condition  or event  existed or exists
     (including,  without limitation, any such event or condition resulting from
     the  failure  of  the  Company  or  any   Subsidiary  to  comply  with  any
     Environmental  Law),  specifying the nature and period of existence thereof
     and what  action the  Company  shall have  taken or  proposes  to take with
     respect thereto.

     7.3 Inspection.

The  Company  shall  permit  the  representatives  of  each  holder  that  is an
Institutional Investor:

          (a) No Default -- if no Default or Event of Default  then  exists,  at
     the  expense  of  such  holder  (with  respect  to  its  travel  and  other
     out-of-pocket costs and compensation  expenses of its representatives) upon
     reasonable  prior notice to the Company,  to visit the principal  executive
     office of the Company, to discuss the affairs, finances and accounts of the
     Company and the  Subsidiaries  with the Company's  officers,  and (with the
     consent of the Company,  which consent will not be  unreasonably  withheld)
     its independent public accountants and its independent petroleum engineers,
     and  (with  the  consent  of  the  Company,   which  consent  will  not  be
     unreasonably  withheld) to visit the other  offices and  properties  of the
     Company  and  each  Subsidiary,  all at  such  reasonable  times  as may be
     reasonably  requested in writing,  PROVIDED  that you shall be permitted to
     make only two  inspections  per calendar year pursuant to the provisions of
     this  subsection (a) (without  limitation of the  inspection  rights of any
     Other Purchaser); and


<PAGE>


          (b) Default -- if a Default or an Event of Default then exists, at the
     expense  of the  Company  to  visit  and  inspect  any of  the  offices  or
     properties  of  the  Company  or  any  Subsidiary,  to  examine  all  their
     respective  books of account,  records,  reports and other papers,  to make
     copies and extracts  therefrom,  and to discuss their  respective  affairs,
     finances and accounts with their respective  officers,  independent  public
     accountants and independent  petroleum engineers (and by this provision the
     Company  authorizes said  accountants and engineers to discuss the affairs,
     finances  and  accounts of the Company and the  Subsidiaries),  all at such
     times and as often as may be requested.

8.   PREPAYMENT OF THE NOTES

     8.1 REQUIRED PREPAYMENTS.

     Regardless of the amount of the Notes which may be outstanding from time to
time,  the Company shall prepay or, in the case of principal  amounts due at the
maturity  of any Note,  pay,  and there  shall  become  due and  payable  on the
respective dates specified below, the respective  aggregate principal amounts of
each Series of Notes  hereinafter  set forth opposite such dates (or such lesser
amount as would constitute payment in full of the Notes of such Series):

================================================================================
      DATE:       | PRINCIPAL AMOUNT | PRINCIPAL AMOUNT   |   PRINCIPAL AMOUNT
                  | OF SERIES D NOTES|OF SERIES E NOTES   |  OF SERIES F NOTES
                  | TO BE PREPAID OR | TO BE PREPAID OR   |   TO BE PREPAID OR
                  |       PAID:      |      PAID:         |        PAID:
==================|==================|====================|=====================
February 15, 2004 |    $20,000,000   |   $12,500,000      |          $0
- ------------------|------------------|--------------------|---------------------
February 15, 2005 |        $0        |   $12,500,000      |          $0
- ------------------|------------------|--------------------|---------------------
February 15, 2006 |        $0        |   $12,500,000      |          $0
- ------------------|------------------|--------------------|---------------------
February 15, 2007 |        $0        |   $12,500,000      |          $0
- ------------------|------------------|--------------------|---------------------
February 15, 2008 |        $0        |   $12,500,000      |          $0
- ------------------|------------------|--------------------|---------------------
February 15, 2009 |        $0        |   $12,500,000      |     $43,000,000
==================|==================|====================|=====================
     Totals       |    $20,000,000   |   $75,000,000      |     $43,000,000
================================================================================

The principal  amount of any Note remaining  outstanding at the maturity thereof
shall be paid at such  maturity.  Each such  prepayment or payment shall be at a
price of 100% of the principal  amount  prepaid or paid,  together with interest
accrued  thereon to (but not  including)  the date of prepayment or payment.  No
Make-Whole  Amount shall be payable in connection with any mandatory  prepayment
or payment made pursuant to this Section 8.1.

     8.2 Optional Prepayments with Make-Whole Amount; Rescission.


<PAGE>


          (a) Optional  Prepayments with Make-Whole  Amount. The Company may, at
     its option,  upon notice as provided below, prepay at any time all, or from
     time to time any part of, the Notes, in a principal amount of not less than
     (i) in the case of a partial  prepayment  other than a Contingent  Optional
     Prepayment,  Five Million  Dollars  ($5,000,000),  or (ii) in the case of a
     partial prepayment which is a Contingent Optional  Prepayment,  Two Million
     Dollars ($2,000,000),  or, in either case, such lesser amount as shall then
     be outstanding,  at one hundred  percent (100%) of the principal  amount so
     prepaid, PLUS the Make-Whole Amount determined for the prepayment date with
     respect to such principal amount. The Company will give each holder written
     notice (an "OPTIONAL  PREPAYMENT NOTICE") of each optional prepayment under
     this  Section  8.2 not less than  thirty  (30) days and not more than sixty
     (60)  days  prior to the date  fixed  for such  prepayment  (the  "OPTIONAL
     PREPAYMENT DATE"). Each such Optional Prepayment Notice shall

               (i) specify the Optional Prepayment Date,

               (ii)  state  whether  such  prepayment  is  contingent  upon  the
          completion  of an asset  disposition  by the  Company or a  Restricted
          Subsidiary or the  consummation  of a new credit facility with another
          creditor or group of creditors (a  "CONTINGENT  OPTIONAL  PREPAYMENT")
          and describe in reasonable detail the terms thereof,

               (iii) specify the aggregate principal amount of each Series to be
          prepaid on such date,

               (iv)  specify  the  principal  amount  of each  Note held by such
          holder to be prepaid (determined in accordance with Section 8.3),

               (v) specify the interest to be paid on the  prepayment  date with
          respect to such principal amount being prepaid, and

               (vi)  be  accompanied  by a  certificate  of a  Senior  Financial
          Officer as to the estimated  Make-Whole  Amount due in connection with
          such  prepayment  (calculated  as if the date of such  notice were the
          date  of  the   prepayment),   setting   forth  the  details  of  such
          computation.

     Two (2) Business Days prior to such  prepayment,  the Company shall deliver
     to each holder a certificate of a Senior Financial  Officer  specifying the
     calculation of such Make-Whole Amount as of the specified prepayment date.

          (b)  Rescission.  In the event that the Company shall give an Optional
     Prepayment Notice of any Contingent Optional Prepayment pursuant to Section
     8.2(a),  the  Company  thereafter  shall  have the  right to  rescind  such
     Optional  Prepayment  Notice by giving each holder  written  notice of such
     rescission  (a  "RESCISSION  NOTICE") not less than ten (10)  Business Days
     prior to the Optional Prepayment Date specified in such Optional Prepayment
     Notice.  Upon delivery of such  Rescission  Notice in accordance  with this
     Section 8.2(b), the Company shall be relieved of any obligation to make the
     Contingent  Optional  Prepayment on the Optional Prepayment Date in respect
     of which such Rescission Notice was delivered.

     8.3 Allocation of Partial Prepayments.


<PAGE>


     All partial  prepayments of the Series D Notes,  the Series E Notes and the
Series F Notes  pursuant to Section 8.1 shall be  allocated  to all  outstanding
Notes of the relevant  Series  ratably in accordance  with the unpaid  principal
amounts  thereof.  All partial  prepayments of the Notes pursuant to Section 8.2
shall be allocated to all outstanding  Notes (without  distinguishing  among the
different  Series)  ratably  in  accordance  with the unpaid  principal  amounts
thereof.  Any partial  prepayment of the Series D Notes,  the Series E Notes and
the Series F Notes pursuant to Section 8.2 shall reduce the principal  amount of
each required  prepayment  of such Series  becoming due under Section 8.1 on and
after the date of such prepayment in the inverse order of the maturity thereof.

     8.4 Maturity; Surrender, etc.

     In the case of each  prepayment  of Notes  pursuant to this  Section 8, the
principal  amount of each Note to be  prepaid  shall  mature  and become due and
payable on the date fixed for such  prepayment,  together  with interest on such
principal amount accrued to such date and the applicable  Make-Whole  Amount, if
any.  From and after  such  date,  unless  the  Company  shall  fail to pay such
principal  amount  when so due and  payable,  together  with  the  interest  and
Make-Whole Amount, if any, as aforesaid, interest on such principal amount shall
cease to accrue.  Any Note paid or prepaid in full shall be  surrendered  to the
Company and cancelled and shall not be reissued,  and no Note shall be issued in
lieu of any prepaid principal amount of any Note.

     8.5 Purchase of Notes.

     The  Company  will not and will not permit  any  Restricted  Subsidiary  or
Affiliate  to  purchase,  redeem,  prepay  or  otherwise  acquire,  directly  or
indirectly,  any of the outstanding  Notes except upon the payment or prepayment
of the Notes in accordance  with the terms of this Agreement and the Notes.  The
Company  will  promptly  cancel  all  Notes  acquired  by it or  any  Restricted
Subsidiary or Affiliate  pursuant to any payment or prepayment of Notes pursuant
to any provision of this Agreement and no Notes may be issued in substitution or
exchange for any such Notes.

     8.6 Make-Whole Amount.

     The term  "MAKE-WHOLE  AMOUNT"  means,  with  respect to any Series D Note,
Series E Note or Series F Note,  an amount  equal to the excess,  if any, of the
Discounted Value of the Remaining  Scheduled Payments with respect to the Called
Principal of such Note over the amount of such Called  Principal,  PROVIDED that
the  Make-Whole  Amount may in no event be less than zero.  For the  purposes of
determining  the  Make-Whole  Amount,  the  following  terms have the  following
meanings:

          "CALLED  PRINCIPAL" means, with respect to any Series D Note, Series E
     Note,  or Series F Note,  the  principal of such Note that is to be prepaid
     pursuant to Section 8.2 or has become or is declared to be immediately  due
     and payable pursuant to Section 12.1, as the context requires.


<PAGE>


          "DISCOUNTED  VALUE" means, with respect to the Called Principal of any
     Series D Note,  Series E Note,  or Series F Note,  the amount  obtained  by
     discounting  all Remaining  Scheduled  Payments with respect to such Called
     Principal from their respective  scheduled due dates to the Settlement Date
     with  respect  to  such  Called  Principal,  in  accordance  with  accepted
     financial  practice and at a discount  factor (applied on the same periodic
     basis as that on which  interest  on the  Notes  is  payable)  equal to the
     Reinvestment Yield with respect to such Called Principal.

          "REINVESTMENT  YIELD" means,  with respect to the Called  Principal of
     any  Series D Note,  Series E Note,  or Series F Note,  the sum of one half
     percent  (.5%) per  annum  plus the yield to  maturity  implied  by (i) the
     yields reported,  as of 10:00 A.M. (New York City time) on the second (2nd)
     Business  Day  preceding  the  Settlement  Date with respect to such Called
     Principal,  on the display designated as "Page 678" on the Dow Jones Market
     Service  (or such other  display as may  replace  Page 678 on the Dow Jones
     Market  Service)  for actively  traded U.S.  Treasury  securities  having a
     maturity equal to the Remaining Average Life of such Called Principal as of
     such  Settlement  Date,  or (ii) if such yields are not reported as of such
     time or the  yields  reported  as of such time are not  ascertainable,  the
     Treasury Constant  Maturity Series Yields reported,  for the latest day for
     which such yields have been so reported as of the second (2nd) Business Day
     preceding the  Settlement  Date with respect to such Called  Principal,  in
     Federal Reserve Statistical Release H.15 (519) (or any comparable successor
     publication) for actively traded U.S. Treasury securities having a constant
     maturity equal to the Remaining Average Life of such Called Principal as of
     such Settlement Date. Such implied yield will be determined,  if necessary,
     by (a) converting U.S. Treasury bill quotations to  bond-equivalent  yields
     in  accordance  with  accepted  financial  practice  and (b)  interpolating
     linearly  between (1) the actively traded U.S.  Treasury  security with the
     constant  maturity  closest to and greater than the Remaining  Average Life
     and (2) the  actively  traded  U.S.  Treasury  security  with the  constant
     maturity closest to and less than the Remaining Average Life.

          "REMAINING  AVERAGE LIFE" means, with respect to any Called Principal,
     the number of years  (calculated to the nearest  one-twelfth year) obtained
     by dividing  (i) such Called  Principal  into (ii) the sum of the  products
     obtained by  multiplying  (a) the  principal  component  of each  Remaining
     Scheduled  Payment with respect to such Called  Principal by (b) the number
     of years  (calculated  to the  nearest  one-twelfth  year) that will elapse
     between the Settlement  Date with respect to such Called  Principal and the
     scheduled due date of such Remaining Scheduled Payment.

          "REMAINING  SCHEDULED  PAYMENTS"  means,  with  respect  to the Called
     Principal  of any  Series D Note,  Series  E Note,  or  Series F Note,  all
     payments of such Called  Principal  and interest  thereon that would be due
     after the  Settlement  Date with  respect to such  Called  Principal  if no
     payment of such Called Principal were made prior to its scheduled due date,
     provided  that if such  Settlement  Date  is not a date on  which  interest
     payments  are due to be made  under the terms of the Notes of such  Series,
     then the amount of the next succeeding  scheduled  interest payment will be
     reduced  by the amount of  interest  accrued  to such  Settlement  Date and
     required  to be paid on such  Settlement  Date  pursuant  to Section 8.2 or
     12.1.

          "SETTLEMENT  DATE" means,  with respect to the Called Principal of any
     Series D Note,  Series E Note,  or  Series F Note,  the date on which  such
     Called  Principal is to be prepaid pursuant to Section 8.2 or has become or
     is declared to be immediately due and payable  pursuant to Section 12.1, as
     the context requires.


<PAGE>



9.   AFFIRMATIVE COVENANTS.

     The Company covenants that so long as any of the Notes are outstanding:

     9.1 Compliance with Law.

     The Company will and will cause each of the Subsidiaries to comply with all
laws, ordinances, rules or regulations of Governmental Authorities to which each
of them is subject, including, without limitation,  Environmental Laws, and will
obtain and maintain in effect all licenses,  certificates,  permits,  franchises
and other authorizations of Governmental  Authorities necessary to the ownership
and  operation  of  their  respective  properties  or to the  conduct  of  their
respective  businesses,  in each case to the  extent  necessary  to ensure  that
non-compliance  with such laws,  ordinances or governmental rules or regulations
or  failures  to  obtain or  maintain  in effect  such  licenses,  certificates,
permits,  franchises and other authorizations of Governmental  Authorities could
not, individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.

     9.2 Insurance.

     The Company will and will cause each of the Subsidiaries to maintain,  with
financially  sound and  reputable  insurers,  insurance  with  respect  to their
respective  properties and businesses against such casualties and contingencies,
of  such  types,  on such  terms  and in such  amounts  (including  deductibles,
co-insurance  and  self-insurance,  if adequate  reserves  are  maintained  with
respect  thereto)  as is  customary  in the  case  of  entities  of  established
reputations  engaged in the same or a similar  business and similarly  situated,
except to the extent  that the  failure to maintain  such  insurance  could not,
individually  or in the  aggregate,  reasonably  be  expected to have a Material
Adverse Effect.

     9.3 Maintenance of Properties.

     The Company  will and will cause each of the  Subsidiaries  to maintain and
keep, or cause to be maintained and kept,  their  respective  properties in good
repair, working order and condition (other than ordinary wear and tear), so that
the business carried on in connection therewith may be properly conducted at all
times, PROVIDED that

          (a) no violation of this Section 9.3 shall be deemed to have  occurred
     with  respect to any property of the Company or any  Subsidiary  damaged or
     destroyed  by a  casualty  occurrence,  so  long  as the  Company  or  such
     Restricted  Subsidiary is  proceeding  diligently to repair or replace such
     property, and


<PAGE>


          (b) this Section shall not prevent the Company or any Subsidiary  from
     discontinuing the operation and the maintenance of any of its properties if
     such  discontinuance  is  desirable  in the conduct of its business and the
     Company has concluded that such discontinuance  could not,  individually or
     in the aggregate,  reasonably be expected to have a Material Adverse Effect
     (which term shall not, for the purpose of this clause (b) only, include the
     discontinuance   of  the   operation  and   maintenance   of  a  Restricted
     Subsidiary's properties that would render such Restricted Subsidiary unable
     to perform its  obligations  under the Subsidiary  Guaranty,  and therefore
     result in a Material Adverse Effect only under clause (c) of the definition
     of such term).

     9.4 Payment of Taxes and Claims.

     The Company  will and will cause each of the  Subsidiaries  to file all tax
returns  required to be filed in any  jurisdiction  and to pay and discharge all
taxes  shown  to be due  and  payable  on such  returns  and  all  other  taxes,
assessments,  governmental  charges,  or levies  imposed on them or any of their
properties,  assets,  income  or  franchises,  to  the  extent  such  taxes  and
assessments  have become due and payable and before they have become  delinquent
and all  claims for which sums have  become due and  payable  that have or might
become a Lien on properties or assets of the Company or any Subsidiary, PROVIDED
that neither the Company nor any Subsidiary  need pay any such tax or assessment
or claims if (a) the amount,  applicability  or validity thereof is contested by
the  Company  or  such  Subsidiary  on a  timely  basis  in  good  faith  and in
appropriate  proceedings,  and the Company or such  Subsidiary  has  established
adequate  reserves  therefor in accordance with GAAP on the books of the Company
or such  Subsidiary or (b) the  nonpayment of all such taxes and  assessments in
the  aggregate  could not  reasonably  be  expected  to have a Material  Adverse
Effect.

     9.5 Corporate Existence, etc.

     Subject to Section 10.5, the Company will at all times preserve and keep in
full force and effect its  corporate  existence.  Subject to  Sections  10.5 and
10.6,  the Company will at all times  preserve and keep in full force and effect
the  corporate  existence of each of the  Subsidiaries  (unless  merged into the
Company or a Subsidiary) and all rights, franchises, licenses and permits of the
Company and the Subsidiaries  unless, in the good faith judgment of the Company,
the termination of or failure to preserve and keep in full force and effect such
corporate existence, right, franchise, license or permit could not, individually
or in the  aggregate,  reasonably be expected to have a Material  Adverse Effect
(which term shall not (for the purpose of this Section 9.5 only)  include,  with
respect to any Restricted Subsidiary,  the termination of or failure to preserve
and keep in full force and effect such corporate  existence,  right,  franchise,
license or permit that would render such Restricted Subsidiary unable to perform
its  obligations  under  the  Subsidiary  Guaranty,  and  therefore  result in a
Material Adverse Effect only under clause (c) of the definition of such term).

     9.6 Pari Passu.

     The Company  covenants that its obligations  under the Notes and under this
Agreement and the Other Agreements do and will rank at least PARI PASSU with all
its other present and future unsecured Senior Debt.

     9.7 Subsidiary Guaranty.


<PAGE>


     The  Company  will  cause  each  Subsidiary   which  becomes  a  Restricted
Subsidiary  after the Closing  Date to execute and deliver to the holders a copy
of the Joinder  Agreement  in the form  attached to the  Subsidiary  Guaranty as
Annex 2, duly executed by such  Subsidiary,  together with an opinion of counsel
satisfactory to the Required Holders  addressing with respect to such Subsidiary
the issues relating to Subsidiaries  and the Subsidiary  Guaranty in the form of
opinion attached hereto as Exhibit 4.4(a).

10.  NEGATIVE COVENANTS.

     The Company covenants that so long as any of the Notes are outstanding:

     10.1 Net Worth.

     The Company will not, at any time, permit Consolidated Net Worth to be less
than the sum of (a) One Hundred Eighty Million Dollars ($180,000,000),  PLUS (b)
an aggregate  amount equal to fifty  percent  (50%) of  Consolidated  Net Income
(but, in each case, only if a positive number) for each completed fiscal year of
the Company beginning with the fiscal year ending December 31, 1999.

     10.2 Interest Coverage.

     The Company will not, at any time, permit (a) EBITDA for the period of four
consecutive  fiscal  quarters of the Company then most recently ended to be less
than (b) five hundred percent (500%) of Consolidated  Interest  Expense for such
period.

     10.3 Debt Incurrence.

          (a) Company  Debt.  The  Company  will not,  directly  or  indirectly,
     create,  incur,  assume,   guarantee,   or  otherwise  become  directly  or
     indirectly liable with respect to, any Debt (including, without limitation,
     any  extension,  renewal  or  refunding  of  Debt),  UNLESS on the date the
     Company becomes liable with respect to any such Debt and immediately  after
     giving effect thereto and the concurrent retirement of any other Debt,

               (i) no Default or Event of Default exists, and

               (ii)  Consolidated  Debt does not exceed fifty  percent  (50%) of
          Total Capitalization.

          (b) Restricted Subsidiary Debt. The Company will not permit any of the
     Restricted Subsidiaries to, directly or indirectly,  create, incur, assume,
     guarantee,  or otherwise become directly or indirectly  liable with respect
     to, any Debt  (including,  without  limitation,  any extension,  renewal or
     refunding of Debt),  UNLESS on the date such Restricted  Subsidiary becomes
     liable with respect to any such Debt and  immediately  after giving  effect
     thereto and the concurrent retirement of any Debt,


<PAGE>



               (i) no Default or Event of Default exists,

               (ii) the  aggregate  amount of Priority  Debt does not exceed ten
          percent (10%) of Consolidated Tangible Assets, and

               (iii)  Consolidated  Debt does not exceed fifty  percent (50%) of
          Total Capitalization.

          (c) Time of Incurrence of Debt. For the purposes of this Section 10.3,
     any Person becoming a Restricted  Subsidiary after the date hereof shall be
     deemed,  at the time it becomes a Restricted  Subsidiary,  to have incurred
     all of its then  outstanding  Debt, and any Person  extending,  renewing or
     refunding  any Debt shall be deemed to have  incurred such Debt at the time
     of such extension, renewal or refunding.

     10.4 Liens.

     The  Company  will  not,  and  will  not  permit  any  of  the   Restricted
Subsidiaries to, directly or indirectly create, incur, assume or permit to exist
(upon the happening of a contingency  or otherwise)  any Lien on or with respect
to any property  (including,  without limitation,  any document or instrument in
respect  of goods or  accounts  receivable)  of the  Company  or any  Restricted
Subsidiary,  whether now owned or held or hereafter  acquired,  or any income or
profits  therefrom  (whether or not  provision is made for the equal and ratable
securing of the Notes in  accordance  with the last  paragraph  of this  Section
10.4),  or assign or  otherwise  convey any right to receive  income or profits,
except:

          (a) Liens for taxes,  assessments  or other  governmental  charges the
     payment of which is not at the time required by Section 9.4;

          (b) statutory Liens of landlords and Liens of carriers,  warehousemen,
     mechanics,  materialmen and other similar Liens, in each case,  incurred in
     the  ordinary  course of  business  for sums not yet due or the  payment of
     which  is  being  contested  in  accordance  with  the  general  procedures
     described in Section 9.4 relating to tax matters;

          (c) Liens (other than any Lien imposed by ERISA)  incurred or deposits
     made in the ordinary  course of business (i) in  connection  with  workers'
     compensation,  unemployment insurance and other types of social security or
     retirement benefits, or (ii) to secure (or to obtain letters of credit that
     secure) the performance of tenders,  statutory  obligations,  surety bonds,
     appeal  and  supersedeas  bonds  (not in  excess  of Five  Million  Dollars
     ($5,000,000)), bids, leases (other than Capital Leases), performance bonds,
     purchase, construction or sales contracts and other similar obligations, in
     each case not incurred or made in  connection  with the borrowing of money,
     the obtaining of advances or credit or the payment of the deferred purchase
     price of property;


<PAGE>


          (d) leases or subleases granted to others,  easements,  rights-of-way,
     restrictions  and  other  similar  charges  or  encumbrances,  in each case
     incidental  to,  and not  interfering  with,  the  ordinary  conduct of the
     business of the  Company or any of the  Restricted  Subsidiaries,  PROVIDED
     that such Liens do not, in the aggregate, materially detract from the value
     of such property with respect to its then current use;

          (e)  Liens  on  property  of the  Company  or  any  of the  Restricted
     Subsidiaries  securing  Debt  owing  to the  Company  or to a  Wholly-Owned
     Restricted Subsidiary;

          (f) Liens existing on the date of this Agreement and securing the Debt
     of the Company and the Restricted  Subsidiaries  identified as secured Debt
     in Schedule 5.15, but not any refinancing of such Debt;

          (g) Liens on property  acquired or  constructed  by the Company or any
     Restricted  Subsidiary  after the date of this  Agreement to secure Debt of
     the Company or such  Restricted  Subsidiary  incurred in connection with or
     related to such  acquisition  or  construction,  and Liens existing on such
     property at the time of acquisition thereof, provided that

               (i) no such Lien shall extend to or cover any property other than
          the property being acquired or constructed  (including contractual and
          other rights related thereto and proceeds thereof),

               (ii) the amount of Debt secured by any such Lien shall not exceed
          an amount  equal to the lesser of the total  purchase or  construction
          price or Fair Market Value (as  determined  in good faith by the Board
          of Directors or the board of directors of such Restricted  Subsidiary)
          of the property being acquired or constructed,  determined at the time
          of such  acquisition or at the time of substantial  completion of such
          construction,

               (iii)  such Lien  shall be  created  concurrently  with or within
          twelve months after such acquisition or substantial completion of such
          construction, and

               (iv) no Default or Event of  Default  shall  exist at the time of
          creation, incurrence or assumption of such Lien;

          (h) Liens existing on property of a corporation at the time it becomes
     a Restricted  Subsidiary or is merged or consolidated with the Company or a
     Restricted Subsidiary, PROVIDED that

               (i) no such Lien shall extend to or cover any property other than
          the property subject to such Lien at the time of any such transaction,

               (ii) the amount of Debt secured by any such Lien shall not exceed
          the Fair  Market  Value (as  determined  in good faith by the Board of
          Directors or the board of directors of such Restricted  Subsidiary) of
          the  property  subject  thereto,   determined  at  the  time  of  such
          transaction,


<PAGE>



               (iii)  such Lien was not  created  in  contemplation  of any such
          transaction, and

               (iv) no Default or Event of  Default  shall  exist at the time of
          any such transaction;

          (i) Liens  incidental  to the conduct of the  business  referred to in
     Section  10.10  (including,  without  limitation,  licenses,  participation
     rights,  rebate or revenue sharing obligations,  or similar  encumbrances),
     PROVIDED that such Liens have not arisen in connection  with the incurrence
     of Debt; and

          (j) Liens,  not otherwise  permitted by the provisions of this Section
     10.4,  on property of the Company or any  Restricted  Subsidiary,  PROVIDED
     that on the date the Company or such Restricted  Subsidiary  becomes liable
     with  respect to the Debt  secured by such  Liens,  and  immediately  after
     giving  effect  thereto  and the  concurrent  retirement  of any other Debt
     constituting Priority Debt,

               (i) no Default or Event of Default exists, and

               (ii) the  aggregate  amount of Priority  Debt does not exceed ten
          percent (10%) of Consolidated Tangible Assets.

     In case any  property  shall be  subjected  to a Lien in  violation of this
Section  10.4,  the  Company  will  forthwith  make or cause to be made,  to the
fullest extent permitted by applicable law,  provision whereby the Notes will be
secured  equally  and  ratably as to such  property  with all other  obligations
secured thereby pursuant to such agreements and instruments as shall be approved
by the Required Holders,  and the Company will promptly cause to be delivered to
each  holder  of a Note an  opinion,  reasonably  satisfactory  to the  Required
Holders,  of Gardere Wynne Sewell & Riggs,  L.L.P. or other independent  counsel
satisfactory  to the  Required  Holders to the effect that such  agreements  and
instruments are enforceable in accordance with their terms, and in any event the
Notes shall have the benefit,  to the full extent that,  and with such  priority
as, the holders of Notes may be entitled under  applicable  law, of an equitable
Lien on such  property  (and any  proceeds  thereof)  securing  the Notes.  Such
violation of this Section 10.4 will  constitute  an Event of Default  hereunder,
whether  or not any such  provision  is made or any  equitable  Lien is  created
pursuant to this Section 10.4.

     10.5 Mergers and Consolidations.


<PAGE>


     The  Company  will  not,  and  will  not  permit  any  of  the   Restricted
Subsidiaries to, consolidate with or merge with any other corporation or convey,
transfer,  spin-off  or  lease  substantially  all of  its  assets  in a  single
transaction  or series of  transactions  to any Person (except that a Restricted
Subsidiary may (x) consolidate with or merge with, or convey, transfer, spin-off
or lease  substantially  all of its assets in a single  transaction or series of
transactions  to, another  Restricted  Subsidiary or the Company and (y) convey,
transfer,  spin-off or lease all of its assets in compliance with the provisions
of Section 10.6),  PROVIDED that the foregoing restriction does not apply to the
consolidation  or merger  of the  Company  with,  or the  conveyance,  transfer,
spin-off or lease of substantially  all of the assets of the Company in a single
transaction or series of transactions to, any Person so long as:

          (a) the successor formed by such consolidation or the survivor of such
     merger or the Person that  acquires by  conveyance,  transfer,  spin-off or
     lease substantially all of the assets of the Company as an entirety, as the
     case may be (the "SUCCESSOR  CORPORATION"),  shall be a solvent corporation
     organized and existing under the laws of the United States of America,  any
     state thereof or the District of Columbia and shall  conduct  substantially
     all of its business in one or more of such jurisdictions;

          (b) if the Company is not the Successor Corporation,  such corporation
     shall have executed and delivered to each holder its  assumption of the due
     and punctual  performance  and observance of each covenant and condition of
     this Agreement and the Notes  (pursuant to such  agreements and instruments
     as shall be  reasonably  satisfactory  to the  Required  Holders),  and the
     Company  shall  have  caused to be  delivered  to each  holder an  opinion,
     reasonably  satisfactory to the Required Holders, of Gardere Wynne Sewell &
     Riggs,   L.L.P.  or  other  nationally   recognized   independent   counsel
     satisfactory to the Required Holders,  to the effect that all agreements or
     instruments  effecting such  assumption are  enforceable in accordance with
     their terms and comply with the terms hereof;

          (c) immediately prior to, and immediately after giving effect to, such
     transaction, no Default or Event of Default would exist; and

          (d)immediately after giving effect to such transaction,  the Successor
     Corporation would be permitted, pursuant to the provisions of Section 10.3,
     to incur at least One  Dollar  ($1) of  additional  Debt  owing to a Person
     other than a Restricted Subsidiary of the Successor Corporation.

No such  conveyance,  transfer,  spin-off or lease of  substantially  all of the
assets of the  Company  shall have the effect of  releasing  the  Company or any
Successor Corporation from its liability under this Agreement or the Notes.

     10.6 Sale of Assets.

          (a) Sale of Assets.  The Company  will not, and will not permit any of
     the  Restricted  Subsidiaries  to,  make any  Transfer,  PROVIDED  that the
     foregoing restriction does not apply to a Transfer if:

               (i) the property that is the subject of such Transfer constitutes
          either  (A)  inventory  held for  sale,  or (B)  equipment,  fixtures,
          supplies  or  materials  no longer  required in the  operation  of the
          business  of the  Company  or such  Restricted  Subsidiary  or that is
          obsolete,  and, in the case of any Transfer described in clause (A) or
          clause (B),  such  Transfer is in the ordinary  course of business (an
          "ORDINARY COURSE TRANSFER");


<PAGE>


               (ii) either

                    (A) such  Transfer is from a  Restricted  Subsidiary  to the
               Company or a Wholly-Owned Restricted Subsidiary, or

                    (B) such  Transfer  is from the  Company  to a  Wholly-Owned
               Restricted Subsidiary,

          so long as immediately  before and immediately  after the consummation
          of such  transaction,  and after giving effect thereto,  no Default or
          Event of Default exists or would exist (collectively with any Ordinary
          Course Transfers, "EXCLUDED TRANSFERS"); or

               (iii) such  Transfer is not an Excluded  Transfer  and all of the
          following conditions shall have been satisfied with respect thereto:

                    (A) such Transfer does not involve a Substantial  Portion of
               the property of the Company and the Restricted Subsidiaries,

                    (B) in the good faith  opinion of the Company,  the Transfer
               is in exchange  for  consideration  with a Fair  Market  Value at
               least equal to that of the property exchanged, and is in the best
               interests of the Company, and

                    (C) immediately  after giving effect to such  transaction no
               Default or Event of Default would exist.

          (b) Debt Prepayment Transfers and Reinvested Transfers.

               (i)  Notwithstanding  the  provisions  of  Section  10.6(a),  the
          determination of whether a Transfer involves a Substantial  Portion of
          the  property  of the  Company  and the  Restricted  Subsidiaries,  as
          provided in Section 10.6(a)(iii)(A), shall be made without taking into
          account  the same  proportion  of the book value  attributable  to the
          property  subject to such Transfer as shall be equal to the proportion
          of the Net Asset Sale Proceeds Amount (the "DESIGNATED PORTION") to be
          applied to either a prepayment of the Notes pursuant to Section 8.2 (a
          "PREPAYMENT  TRANSFER") or the  acquisition  of assets  similar to the
          assets  which  were  the  subject  of  such  Transfer  (a  "REINVESTED
          TRANSFER") within one hundred eighty (180) days of the consummation of
          such Transfer,  as specified in an Officer's  Certificate delivered to
          each holder prior to, or  contemporaneously  with, the consummation of
          such Transfer.


<PAGE>


               (ii)  If,  notwithstanding  the  certificate  referred  to in the
          foregoing  clause  (i),  the  Company  shall  fail to apply the entire
          amount of the  Designated  Portion as  specified  in such  certificate
          within the period stated in Section  10.6(b)(i),  the  computation  of
          whether such Transfer  involved a Substantial  Portion of the property
          of the Company and the Restricted Subsidiaries shall be recomputed, as
          of the  date of  such  Transfer,  by  taking  into  account  the  same
          proportion of the book value  attributable to the property  subject to
          such  Transfer  as shall be equal to the  proportion  of the Net Asset
          Sale Proceeds Amount actually applied to either a Prepayment  Transfer
          or  a  Reinvested   Transfer   within  such   period.   If,  upon  the
          recomputation  provided for in the preceding  sentence,  such Transfer
          involved a Substantial  Portion of the property of the Company and the
          Restricted  Subsidiaries,  an Event of Default shall be deemed to have
          existed as of the expiration of such period.

          (c)  Certain  Definitions.  The  following  terms  have the  following
     meanings:

               (i) DISPOSITION  VALUE -- means, at any time, with respect to any
          Transfer of property,

                    (A) in the case of property that does not constitute capital
               stock of a Restricted Subsidiary,  the book value thereof, valued
               at the amount  taken into  account  (or which would be taken into
               account) in the  consolidated  balance  sheet of the Company then
               most  recently  required  to have been  delivered  to the holders
               pursuant to Section 7.1, and

                    (B) in the case of property that  constitutes  capital stock
               of a Restricted Subsidiary, an amount equal to that percentage of
               the book value of the assets of the  Restricted  Subsidiary  that
               issued such capital stock as is equal to the percentage  that the
               book value of such capital stock  represents of the book value of
               all  of  the   outstanding   capital  stock  of  such  Restricted
               Subsidiary  (assuming,  in  making  such  calculations,  that all
               Securities  convertible  into such capital stock are so converted
               and giving full effect to all transactions that would occur or be
               required in connection  with such  conversion),  determined as of
               the date of the balance sheet referred to in the foregoing clause
               (A).

               (ii)  SUBSTANTIAL  PORTION -- means,  at any time,  any  property
          subject to a Transfer if

                    (A) the  Disposition  Value of such property,  when added to
               the  Disposition  Value of all other  property of the Company and
               the  Restricted  Subsidiaries  that  has been  the  subject  of a
               Transfer  (other  than an Excluded  Transfer  and  subject,  with
               respect to both such property and all such other property, to the
               provisions  of Section  10.6(b))  during the then current  fiscal
               year of the Company, exceeds an amount equal to ten percent (10%)
               of  Consolidated  Total  Assets  as  reflected  (or as  would  be
               reflected) in the consolidated  balance sheet of the Company then
               most  recently  required  to have been  delivered  to the holders
               pursuant to Section 7.1, or


<PAGE>


                    (B) the  Disposition  Value of such property,  when added to
               the  Disposition  Value of all other  property of the Company and
               the  Restricted  Subsidiaries  that  has been  the  subject  of a
               Transfer  (other  than an Excluded  Transfer  and  subject,  with
               respect to both such property and all such other property, to the
               provisions of Section 10.6(b)) during the period beginning on the
               Closing  Date  and  ending  on  and  including  the  date  of the
               consummation of such Transfer,  exceeds an amount equal to twenty
               percent  (20%) of  Consolidated  Total Assets as reflected (or as
               would be  reflected)  in the  consolidated  balance  sheet of the
               Company then most recently required to have been delivered to the
               holders pursuant to Section 7.1 hereof.

               (iii)  TRANSFER  --  means,  with  respect  to  any  Person,  any
          transaction in which such Person sells,  conveys,  transfers or leases
          (as  lessor)  any  of its  property,  including,  without  limitation,
          capital stock of any other Person.

     10.7 Restricted Payments and Restricted Investments.

          (a)  Limitation.  The Company will not, and will not permit any of the
     Restricted Subsidiaries to, directly or indirectly,  declare, make or incur
     any  liability  to make any  Restricted  Payment or make or  authorize  any
     Restricted  Investment  UNLESS  immediately  after  giving  effect  to such
     action:

               (i) the sum of (x) the aggregate amount of outstanding Restricted
          Investments  (valued  immediately  after  such  action),  PLUS (y) the
          aggregate  amount  of  Restricted  Payments  of the  Company  and  the
          Restricted  Subsidiaries declared or made during the period commencing
          on the Closing Date, and ending on the date such Restricted Payment or
          Restricted Investment is declared or made, inclusive, would not exceed
          the sum of

                    (A) Thirty-Five Million Dollars ($35,000,000), PLUS

                    (B) fifty percent (50%) of  Consolidated  Net Income for the
               period  commencing  January  1, 1999 and  ending on the date such
               Restricted  Payment or such Restricted  Investment is declared or
               made (or MINUS 100% of Consolidated Net Income for such period if
               Consolidated Net Income for such period is a loss), PLUS

                    (C) the aggregate  amount of Net Proceeds of Common Stock of
               the Company for such period; and

               (ii) the Company could incur,  pursuant to Section 10.3, at least
          One Dollar  ($1) of  additional  Debt  owing to a Person  other than a
          Restricted Subsidiary; and

               (iii) no Default or Event of Default would exist.

          (b) Time of Payment.  The Company  will not, nor will it permit any of
     the Restricted  Subsidiaries to, authorize a Restricted Payment that is not
     payable within sixty (60) days of authorization.


<PAGE>



          (c)  Investments  of   Subsidiaries.   Each  Person  which  becomes  a
     Restricted  Subsidiary  after the Closing Date will be deemed to have made,
     on the date such Person  becomes a Restricted  Subsidiary,  all  Restricted
     Investments  of such Person in existence on such date.  Investments  in any
     Person that ceases to be a  Restricted  Subsidiary  after the Closing  Date
     (but in which the Company or another  Restricted  Subsidiary  continues  to
     maintain  an  Investment)  will be  deemed to have been made on the date on
     which such Person ceases to be a Restricted Subsidiary.

     10.8 Limitations on Certain Restricted Subsidiary Actions.

     The  Company  will  not,  and  will  not  permit  any  of  the   Restricted
Subsidiaries  to, enter into any agreement  which would  restrict any Restricted
Subsidiary's legal ability or right to:

          (a) pay dividends or make any other distributions on its common stock;

          (b) pay any Debt owing to the Company or another Restricted Subsidiary
     (other than waivers of subrogation);

          (c)  make  any  Investment  in  the  Company  or  another   Restricted
     Subsidiary;

          (d)  transfer  its  property  to the  Company  or  another  Restricted
     Subsidiary  (except that any such agreement may (i) prohibit the assignment
     of contractual  rights,  (ii) include grants of contractual rights of first
     refusal,  and (iii) include similar contractual  obligations not unusual in
     the course of such Restricted Subsidiary's business); or

          (e) Guaranty the Notes or any renewals or refinancings thereof;

PROVIDED, however, that

               (i) the restrictions of this Section 10.8 shall not apply to

                    (A) any such  agreement in existence on the Closing Date and
               set forth in Schedule 10.8,

                    (B) this Agreement, or

                    (C) other agreements relating to the creation of Senior Debt
               incurred in accordance with the terms of this Agreement, and

               (ii) the  restrictions  of clause (d) of this  Section 10.8 shall
          not apply to any  agreement  relating to the creation of Priority Debt
          or Debt of  Restricted  Subsidiaries  secured  by Liens  permitted  by
          Section 10.4(a) to Section 10.4(i), inclusive, to the extent that such
          restrictions  limit  the  ability  of  any  Restricted  Subsidiary  to
          transfer the Property  that secures such  Priority  Debt or such other
          Debt;


<PAGE>



PROVIDED  further that, in the case of the foregoing  clauses (i) and (ii), such
agreement does not impose any limitations on any Restricted Subsidiary's ability
to perform its obligations under the Subsidiary Guaranty.

     10.9 Affiliate Transactions.

     The  Company  will  not,  and  will  not  permit  any  of  the   Restricted
Subsidiaries to, directly or indirectly,  enter into any transaction (other than
transactions  among the Company and its wholly-owned  Unrestricted  Subsidiaries
that are not, individually or in the aggregate,  Material),  including,  without
limitation,  the purchase,  sale or exchange of property or the rendering of any
service,   with  any  Affiliate  of  the  Company  or  any  of  its   Restricted
Subsidiaries,  except in the ordinary  course of business of the Company or such
Restricted  Subsidiary and upon fair and  reasonable  terms no less favorable to
the Company or such  Restricted  Subsidiary than it would obtain in a comparable
arm's-length transaction with a Person not an Affiliate.

     10.10 Line of Business.

     The  Company  will not,  and will not  permit any of the  Subsidiaries  to,
engage in any business if, as a result, the Company and the Subsidiaries,  taken
as a whole,  would not be engaged primarily in the provision of (a) seismic data
services,  (b)  exploration  for, and  development and ownership of, gas and oil
reserves,  (c)  gas  marketing  and  (d)  businesses  related  to the  foregoing
businesses.

11. EVENTS OF DEFAULT.

     An "EVENT OF DEFAULT"  shall exist if any of the  following  conditions  or
events shall occur and be continuing:

          (a)  the  Company  defaults  in the  payment  of any  principal  of or
     Make-Whole  Amount,  if any,  on any Note  when the  same  becomes  due and
     payable,  whether  at  maturity  or at a date  fixed for  prepayment  or by
     declaration or otherwise; or

          (b) the Company  defaults  in the payment of any  interest on any Note
     for more  than  five (5)  Business  Days  after  the same  becomes  due and
     payable; or

          (c) the Company  defaults in the performance of or compliance with any
     term  contained in Sections  10.1 through  10.9,  inclusive,  except as set
     forth in paragraph 11(d) below with respect to Section 10.4; or


<PAGE>


          (d) the Company  defaults in the performance of or compliance with any
     term contained  herein (other than those referred to in paragraphs (a), (b)
     and (c) of this  Section  11) or  incurs  at any time  Liens  of the  types
     described in  paragraphs  (a), (b) and (c) of Section 10.4 for  obligations
     then due aggregating less than Five Million Dollars ($5,000,000),  and such
     default is not remedied  within thirty (30) days after the earlier of (i) a
     Responsible Officer obtaining actual knowledge of such default and (ii) the
     Company  receiving written notice of such default from any holder (any such
     written  notice to be  identified  as a "notice  of  default"  and to refer
     specifically to this Section 11(d)); or

          (e) any  representation or warranty made in writing by or on behalf of
     the Company or any  Restricted  Subsidiary or by any officer of the Company
     or any Restricted  Subsidiary in this Agreement or the Subsidiary  Guaranty
     or  in  any  writing   furnished  in  connection   with  the   transactions
     contemplated  hereby proves to have been false or incorrect in any material
     respect on the date as of which made; or

          (f) (i) the  Company or any  Restricted  Subsidiary  is in default (as
     principal or as guarantor or other  surety) in the payment of any principal
     of or premium or make-whole amount or interest on any one or more issues of
     outstanding  Debt in an aggregate  principal amount of at least Ten Million
     Dollars  ($10,000,000)  beyond any period of grace  provided  with  respect
     thereto, or (ii) the Company or any Restricted  Subsidiary is in default in
     the  performance of or compliance  with any term of any evidence of any one
     or more issues of Debt in an aggregate  outstanding  principal amount of at
     least Ten Million Dollars  ($10,000,000)  or of any mortgage,  indenture or
     other agreement  relating  thereto or any other condition  exists,  and the
     effect of such default or  condition is to cause,  or the holder or holders
     of such  obligation (or a trustee on behalf of such holder or holders) as a
     result of such default or condition  actually  cause,  such  obligation  to
     become due prior to any originally stated maturity, or to be repurchased by
     the Company or any Restricted  Subsidiary prior to any originally scheduled
     maturity; or

          (g) the Company or any  Restricted  Subsidiary  (i) is  generally  not
     paying, or admits in writing its inability to pay, its debts as they become
     due, (ii) files,  or consents by answer or otherwise to the filing  against
     it of, a petition for relief or  reorganization or arrangement or any other
     petition  in  bankruptcy,  for  liquidation  or to  take  advantage  of any
     bankruptcy, insolvency, reorganization,  moratorium or other similar law of
     any  jurisdiction,  (iii)  makes  an  assignment  for  the  benefit  of its
     creditors,  (iv)  consents to the  appointment  of a  custodian,  receiver,
     trustee or other  officer  with  similar  powers with respect to it or with
     respect to any  substantial  part of its property,  (v) is  adjudicated  as
     insolvent  or to be  liquidated,  or (vi)  takes  corporate  action for the
     purpose of any of the foregoing; or

          (h) a court or governmental authority of competent jurisdiction enters
     an  order  appointing,  without  consent  by  the  Company  or  any  of the
     Subsidiaries, a custodian,  receiver, trustee or other officer with similar
     powers with  respect to it or with respect to any  substantial  part of its
     property,  or  constituting an order for relief or approving a petition for
     relief  or  reorganization  or any  other  petition  in  bankruptcy  or for
     liquidation or to take advantage of any bankruptcy or insolvency law of any
     jurisdiction, or ordering the dissolution, winding-up or liquidation of the
     Company or any of the  Subsidiaries,  or any such  petition  shall be filed
     against the Company or any of the  Subsidiaries and such petition shall not
     be dismissed within sixty (60) days; or


<PAGE>


          (i) a final judgment or judgments for the payment of money aggregating
     in excess of Five Million Dollars  ($5,000,000) are rendered against one or
     more of the Company and the Subsidiaries and such judgments are not, within
     forty-five  (45) days after entry  thereof,  bonded,  discharged  or stayed
     pending appeal, or are not discharged within forty-five (45) days after the
     expiration of such stay; or

          (j) (i) the  Subsidiary  Guaranty  shall cease to be in full force and
     effect  or  shall  be  declared  by a court or  Governmental  Authority  of
     competent  jurisdiction to be void,  voidable or unenforceable  against any
     Restricted Subsidiary,

               (ii) the validity or  enforceability  of the Subsidiary  Guaranty
          against  any  Restricted   Subsidiary   shall  be  contested  by  such
          Restricted Subsidiary, the Company or any Affiliate, or

               (iii) any  Restricted  Subsidiary,  the Company or any  Affiliate
          shall deny that such Restricted  Subsidiary has any further  liability
          or obligation under the Subsidiary Guaranty.

12.  REMEDIES ON DEFAULT, ETC.

     12.1 ACCELERATION.

          (a) If an Event of Default  with  respect to the Company  described in
     paragraph  (g) or (h) of  Section  11  (other  than  an  Event  of  Default
     described  in clause (i) of  paragraph  (g) or  described in clause (vi) of
     paragraph (g) by virtue of the fact that such clause encompasses clause (i)
     of  paragraph  (g)) has  occurred,  all the Notes  then  outstanding  shall
     automatically become immediately due and payable.

          (b) If any other Event of Default has occurred and is continuing,  the
     Required  Holders  may at any time at its or their  option,  by  notice  or
     notices  to the  Company,  declare  all the Notes  then  outstanding  to be
     immediately due and payable.

          (c) If any  Event of  Default  described  in  paragraph  (a) or (b) of
     Section 11 has occurred and is  continuing,  any holder or holders of Notes
     at the time outstanding  affected by such Event of Default may at any time,
     at its or their  option,  by notice or notices to the Company,  declare all
     the Notes held by it or them to be immediately due and payable.


<PAGE>


     Upon any Notes  becoming due and payable under this Section  12.1,  whether
automatically or by declaration, such Notes will forthwith mature and the entire
unpaid principal amount of such Notes,  PLUS (x) all accrued and unpaid interest
thereon and (y) the  Make-Whole  Amount  determined in respect of such principal
amount  (to  the  full  extent  permitted  by  applicable  law),  shall  all  be
immediately due and payable, in each and every case without presentment, demand,
protest  or  further  notice,  all of  which  are  hereby  waived.  The  Company
acknowledges,  and the parties  hereto agree,  that each holder has the right to
maintain its investment in the Notes free from repayment by the Company  (except
as herein  specifically  provided  for) and that the  provision for payment of a
Make-Whole  Amount by the Company in the event that the Notes are prepaid or are
accelerated  as a  result  of  an  Event  of  Default  is  intended  to  provide
compensation for the deprivation of such right under such circumstances.

     12.2 Other Remedies.

     If any  Default or Event of Default has  occurred  and is  continuing,  and
irrespective of whether any Notes have become or have been declared  immediately
due and  payable  under  Section  12.1,  the  holder  of any  Note  at the  time
outstanding  may  proceed to protect and enforce the rights of such holder by an
action at law, suit in equity or other appropriate  proceeding,  whether for the
specific performance of any agreement contained herein or in any Note, or for an
injunction against a violation of any of the terms hereof or thereof,  or in aid
of the exercise of any power granted hereby or thereby or by law or otherwise.

     12.3 Rescission.

     At any time after any Notes have been declared due and payable  pursuant to
clause (b) or (c) of Section 12.1,  the Required  Holders,  by written notice to
the Company,  may rescind and annul any such declaration and its consequences if
(a) the Company has paid all overdue interest on the Notes, all principal of and
Make-Whole  Amount, if any, on any Notes that are due and payable and are unpaid
other  than by reason of such  declaration,  and all  interest  on such  overdue
principal  and  Make-Whole  Amount,  if any,  and (to the  extent  permitted  by
applicable  law) any overdue  interest  in respect of the Notes,  at the Default
Rate, (b) all Events of Default and Defaults,  other than non-payment of amounts
that have  become due solely by reason of such  declaration,  have been cured or
have been waived  pursuant to Section 17, and (c) no judgment or decree has been
entered for the payment of any monies due  pursuant  hereto or to the Notes.  No
rescission  and  annulment  under this Section 12.3 will extend to or affect any
subsequent Event of Default or Default or impair any right consequent thereon.

     12.4 No Waivers or Election of Remedies, Expenses, etc.

     No course of dealing  and no delay on the part of any holder in  exercising
any  right,  power or remedy  shall  operate as a waiver  thereof  or  otherwise
prejudice such holder's rights,  powers or remedies.  No right,  power or remedy
conferred  by this  Agreement  or by any Note upon any holder  thereof  shall be
exclusive of any other right,  power or remedy  referred to herein or therein or
now or hereafter  available at law, in equity, by statute or otherwise.  Without
limiting the  obligations  of the Company under Section 15, the Company will pay
to each holder on demand such further amount as shall be sufficient to cover all
costs and  expenses of such holder  incurred in any  enforcement  or  collection
under this Section 12,  including,  without  limitation,  reasonable  attorneys'
fees, expenses and disbursements.

13.  REGISTRATION; EXCHANGE; SUBSTITUTION OF NOTES.

     13.1 Registration of Notes.


<PAGE>


     The Company shall keep at its principal executive office a register for the
registration  and  registration  of transfers of Notes.  The name and address of
each holder of one or more Notes, each transfer thereof and the name and address
of each  transferee of one or more Notes shall be  registered in such  register.
Prior to due presentment for registration of transfer,  the Person in whose name
any Note shall be registered shall be deemed and treated as the owner and holder
thereof for all purposes  hereof,  and the Company  shall not be affected by any
notice or knowledge to the  contrary.  The Company shall give to any holder that
is an  Institutional  Investor  promptly upon request  therefor,  a complete and
correct copy of the names and addresses of all registered holders.

     13.2 Transfer and Exchange of Notes.

     Upon surrender of any Note at the principal executive office of the Company
for  registration  of transfer or exchange  (and in the case of a surrender  for
registration of transfer,  duly endorsed or accompanied by a written  instrument
of transfer duly executed by the registered  holder of such Note or his attorney
duly  authorized in writing and  accompanied  by the address for notices of each
transferee  of such Note or part  thereof,  and subject to  compliance  with all
restrictions  on transfer set forth herein and in such Note),  the Company shall
execute and  deliver,  at the  Company's  expense  (except as  provided  below),
promptly  and, in any event,  within ten (10) days of the surrender of such Note
by the  registered  holder  thereof,  one or more new Notes (as requested by the
holder thereof) in exchange therefor,  in an aggregate principal amount equal to
the unpaid principal amount of the surrendered Note. Each such new Note shall be
payable to such Person as such holder may request and shall be  substantially in
the form of Exhibit 1D,  Exhibit 1E or Exhibit 1F, as the case may be. Each such
new Note shall be dated and bear interest from the date to which  interest shall
have been paid on the surrendered Note or dated the date of the surrendered Note
if no interest shall have been paid thereon.  The Company may require payment of
a sum  sufficient  to cover any  stamp tax or  governmental  charge  imposed  in
respect  of any such  transfer  of  Notes.  Notes  shall not be  transferred  in
denominations  of less than One Hundred Thousand  Dollars  ($100,000),  PROVIDED
that if  necessary  to enable the  registration  of  transfer by a holder of its
entire  holding  of Notes,  one Note may be in a  denomination  of less than One
Hundred Thousand Dollars ($100,000). Any transferee, by its acceptance of a Note
registered  in its name (or the name of its  nominee),  shall be  deemed to have
made the  representations  set forth in Section  6.1  (unless  such  transfer is
effected pursuant to a transaction in which the representation set forth in such
Section is not required in order to comply with the securities  laws  applicable
to such transfer) and Section 6.3.

     13.3 Replacement of Notes.

     Upon receipt by the Company of evidence  reasonably  satisfactory  to it of
the  ownership of and the loss,  theft,  destruction  or  mutilation of any Note
(which evidence shall be, in the case of an Institutional Investor,  notice from
such Institutional Investor of such ownership and such loss, theft,  destruction
or mutilation), and

          (a) in the case of loss, theft or destruction, of indemnity reasonably
     satisfactory  to it  (provided  that if an  original  Purchaser  or another
     holder of Notes that is a  Qualified  Institutional  Buyer is the holder of
     such Note,  the  unsecured  agreement  of indemnity of such holder shall be
     deemed to be satisfactory), or

          (b) in  the  case  of  mutilation,  upon  surrender  and  cancellation
     thereof,


<PAGE>


the Company at its own expense  shall  execute  and,  within ten (10) days after
such receipt,  deliver,  in lieu thereof, a new Note, dated and bearing interest
from the date to which  interest  shall  have  been paid on such  lost,  stolen,
destroyed or mutilated Note or dated the date of such lost, stolen, destroyed or
mutilated Note if no interest shall have been paid thereon.

14.  PAYMENTS ON NOTES.

     14.1 Place of Payment.

     The Company will  punctually pay, or cause to be paid, the principal of and
interest  (and  Make-Whole  Amount,  if any) on the Notes,  as and when the same
shall  become due and payable  according  to the terms  hereof and of the Notes.
Subject to Section 14.2,  payments of principal,  Make-Whole Amount, if any, and
interest  becoming  due and payable on the Notes shall be made at the  principal
office of the Company in Texas.  The Company may at any time,  by notice to each
holder,  change  the  place of  payment  of the  Notes so long as such  place of
payment shall be either the principal office of the Company in such jurisdiction
or the principal office of a bank or trust company in such jurisdiction.

     14.2 Home Office Payment.

     So long  as you or your  nominee  shall  be the  holder  of any  Note,  and
notwithstanding  anything  contained  in  Section  14.1 or in  such  Note to the
contrary, the Company will pay all sums becoming due on such Note for principal,
Make-Whole  Amount,  if any,  and  interest  by the  method  and at the  address
specified  for such  purpose  below  your name in  Schedule  A, or by such other
method or at such other address as you shall have from time to time specified to
the Company in writing for such purpose,  without the  presentation or surrender
of such Note or the making of any  notation  thereon,  except that upon  written
request of the Company  made  concurrently  with or  reasonably  promptly  after
payment or prepayment  in full of any Note,  you shall  surrender  such Note for
cancellation,  reasonably promptly after any such request, to the Company at its
principal  executive office or at the place of payment most recently  designated
by the Company pursuant to Section 14.1. Prior to any sale or other  disposition
of any Note held by you or your  nominee  you  will,  at your  election,  either
endorse  thereon the amount of principal paid thereon and the last date to which
interest has been paid thereon or surrender such Note to the Company in exchange
for a new Note or Notes  pursuant to Section  13.2.  The Company will afford the
benefits of this Section 14.2 to any  Institutional  Investor that is the direct
or indirect transferee of any Note purchased by you under this Agreement.

15.  EXPENSES, ETC.

     15.1 Transaction Expenses.


<PAGE>


     Whether or not the transactions  contemplated  hereby are consummated,  the
Company  will  pay all  reasonable  attorneys'  fees of Hebb &  Gitlin,  special
counsel to you and the Other Purchasers,  in connection with such  transactions,
and will pay all costs and expenses (including  reasonable  attorneys' fees of a
special counsel and, if reasonably required, local or other counsel) incurred by
you and each Other  Purchaser or holder in  connection  with the  consideration,
evaluation, analysis, assessment,  negotiation,  preparation and/or execution of
any amendments, waivers or consents under or in respect of this Agreement or the
Notes (whether or not any such amendment,  waiver or consent becomes effective),
or in  connection  with any  controversy  or potential  controversy  thereunder,
including,  without limitation: (a) the costs and expenses incurred in enforcing
or  defending  (or  determining  whether or how to enforce or defend) any rights
under this  Agreement  or the Notes or in  responding  to any  subpoena or other
legal process or informal  investigative  demand issued in connection  with this
Agreement  or the Notes,  or by reason of being a holder,  and (b) the costs and
expenses,  including  financial  advisors' fees, incurred in connection with the
insolvency or bankruptcy of the Company or any Subsidiary or in connection  with
any work-out or restructuring of the transactions contemplated hereby and by the
Notes.  The Company will pay,  and will save you and each other holder  harmless
from,  all claims in respect of any fees,  costs or  expenses if any, of brokers
and finders (other than those retained by you).

     15.2 Survival.

     The  obligations  of the  Company  under this  Section 15 will  survive the
payment or transfer of any Note,  the  enforcement,  amendment  or waiver of any
provision of this Agreement or the Notes, and the termination of this Agreement.

16.  SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT.

     All  representations  and  warranties  contained  herein shall  survive the
execution and delivery of this Agreement and the Notes, the purchase or transfer
by you of any Note or portion thereof or interest therein and the payment of any
Note (but not the payment in full of all of the  Notes),  and may be relied upon
by any subsequent holder of a Note,  regardless of any investigation made at any
time by or on behalf of you or any other holder. All statements contained in any
certificate  or  other  instrument  delivered  by or on  behalf  of the  Company
pursuant to this Agreement shall be deemed representations and warranties of the
Company under this Agreement.  Subject to the preceding sentence, this Agreement
and the Notes embody the entire agreement and understanding  between you and the
Company and supersede all prior  agreements and  understandings  relating to the
subject matter hereof.

17.  AMENDMENT AND WAIVER.

     17.1 Requirements.

     This Agreement and the Notes may be amended, and the observance of any term
hereof or of the Notes may be waived (either  retroactively  or  prospectively),
with (and  only  with) the  written  consent  of the  Company  and the  Required
Holders,  except that (a) no  amendment  or waiver of any of the  provisions  of
Section 1 to Section 6,  inclusive,  or Section 21, or any defined term as it is
used therein, will be effective as to you unless consented to by you in writing,
and (b) no such  amendment  or waiver may,  without  the written  consent of the
holder of each Note at the time outstanding affected thereby, (i) subject to the
provisions  of Section 12 relating to  acceleration  or  rescission,  change the
amount or time of any  prepayment or payment of principal of, or reduce the rate
or change the time of payment or method of  computation  of  interest  or of the
Make-Whole  Amount on, the Notes,  (ii) change the  percentage  of the principal
amount of the Notes the  holders  of which are  required  to consent to any such
amendment or waiver,  or (iii) amend any of Sections 8, 11(a),  11(b), 12, 17 or
20.

     17.2 Solicitation of Holders.

          (a) Solicitation.  The Company will provide each holder  (irrespective
     of the  amount  of Notes  then  owned by it) with  sufficient  information,
     sufficiently  far in advance of the date a decision is required,  to enable
     such holder to make an informed and considered decision with respect to any
     proposed  amendment,  waiver or consent in respect of any of the provisions
     hereof or of the Notes.  The  Company  will  deliver  executed  or true and
     correct copies of each amendment,  waiver or consent  effected  pursuant to
     the  provisions  of this Section 17 to each holder  promptly  following the
     date on which it is executed and  delivered  by, or receives the consent or
     approval of, the requisite holders.

          (b) Payment.  The Company will not directly or indirectly pay or cause
     to be paid any  remuneration,  whether by way of supplemental or additional
     interest,  fee or  otherwise,  or grant  any  security,  to any  holder  as
     consideration for, as an inducement to, or otherwise in connection with the
     entering  into by any holder of any waiver or amendment of any of the terms
     and provisions  hereof unless such  remuneration is  concurrently  paid, or
     security is concurrently granted, on the same terms, ratably to each holder
     then  outstanding  even if such  holder did not  consent to such  waiver or
     amendment.

          (c) Scope of Consent.  Any consent made  pursuant to this Section 17.2
     by a holder of Notes that has  transferred  or has agreed to  transfer  its
     Notes to the Company,  any  Subsidiary or any Affiliate and has provided or
     has agreed to provide such written  consent as a condition to such transfer
     shall be void and of no force and effect  except  solely as to such holder,
     and any amendments effected or waivers granted or to be effected or granted
     that would not have been or would not be so  effected  or  granted  but for
     such  consent  (and the  consents  of all other  holders of Notes that were
     acquired  under  the same or  similar  conditions)  shall be void and of no
     force  and  effect,  retroactive  to the  date  such  amendment  or  waiver
     initially took or takes effect, except solely as to such holder.

     17.3 Binding Effect, etc.

     Any amendment or waiver consented to as provided in this Section 17 applies
equally to all holders and is binding  upon them and upon each future  holder of
any Notes and upon the  Company  without  regard to  whether  such Note has been
marked to indicate such  amendment or waiver.  No such  amendment or waiver will
extend to or affect any  obligation,  covenant,  agreement,  Default or Event of
Default not expressly amended or waived or impair any right consequent  thereon.
No course of  dealing  between  the  Company  and the holder of any Note nor any
delay in  exercising  any rights  hereunder or under any Note shall operate as a
waiver of any rights of any holder of such Note. As used herein,  the term "THIS
AGREEMENT" and references  thereto shall mean this Agreement as it may from time
to time be amended or supplemented.

     17.4 Notes held by Company, etc.


<PAGE>


     Solely for the purpose of determining  whether the holders of the requisite
percentage  of the aggregate  principal  amount of Notes then  outstanding  have
approved or consented to any amendment, waiver or consent to be given under this
Agreement  or the Notes,  or have  directed  the  taking of any action  provided
herein  or in the  Notes to be taken  upon the  direction  of the  holders  of a
specified   percentage  of  the  aggregate   principal   amount  of  Notes  then
outstanding, Notes directly or indirectly owned by the Company, any Wholly-Owned
Restricted  Subsidiary or any of the Company's Affiliates shall be deemed not to
be outstanding.

18.  NOTICES.

     All notices and  communications  provided for hereunder shall be in writing
and sent (a) by telecopy if the sender on the same day sends a  confirming  copy
of such notice by a recognized overnight delivery service (charges prepaid),  or
(b) by  registered  or certified  mail with return  receipt  requested  (postage
prepaid),  or (c) by a  recognized  overnight  delivery  service  (with  charges
prepaid). Any such notice must be sent:

               (i) if to  you  or  your  nominee,  to  you or it at the  address
          specified  for such  communications  in  Schedule  A, or at such other
          address as you or it shall have specified to the Company in writing,

               (ii) if to any other  holder,  to such holder at such  address as
          such other holder shall have specified to the Company in writing, or

               (iii) if to the Company,  to the Company at its address set forth
          at the  beginning  hereof  to the  attention  of the  Company's  Chief
          Financial Officer,  or at such other address as the Company shall have
          specified to each of the holders in writing.

Notices under this Section 18 will be deemed given only when actually received.

19.  REPRODUCTION OF DOCUMENTS.

     This  Agreement  and all documents  relating  thereto,  including,  without
limitation,  (a)  consents,  waivers and  modifications  that may  hereafter  be
executed,  (b)  documents  received  by you at the  Closing  (except  the  Notes
themselves),  and (c) financial  statements,  certificates and other information
previously  or  hereafter  furnished  to you,  may be  reproduced  by you by any
photographic, photostatic, microfilm, microcard, miniature photographic or other
similar  process and you may destroy any original  document so  reproduced.  The
Company agrees and stipulates  that, to the extent  permitted by applicable law,
any such reproduction  shall be admissible in evidence as the original itself in
any  judicial or  administrative  proceeding  (whether or not the original is in
existence  and whether or not such  reproduction  was made by you in the regular
course of business) and any  enlargement,  facsimile or further  reproduction of
such  reproduction  shall  likewise be admissible  in evidence.  This Section 19
shall not  prohibit  the Company or any other  holder from  contesting  any such
reproduction  to the same extent that it could  contest  the  original,  or from
introducing evidence to demonstrate the inaccuracy of any such reproduction.

20.  CONFIDENTIAL INFORMATION.


<PAGE>


     For the  purposes of this  Section  20,  "Confidential  Information"  means
information delivered to you by or on behalf of the Company or any Subsidiary in
connection with the transactions  contemplated by or otherwise  pursuant to this
Agreement  that is  proprietary in nature and that was clearly marked or labeled
or otherwise  adequately  identified when received by you as being  confidential
information of the Company or such Subsidiary,  PROVIDED that such term does not
include  information that (a) was publicly known or otherwise known to you prior
to the time of such disclosure,  (b) subsequently becomes publicly known through
no act or omission by you or any Person  acting on your  behalf,  (c)  otherwise
becomes  known to you  other  than  through  disclosure  by the  Company  or any
Subsidiary  or (d)  constitutes  financial  statements  delivered  to you  under
Section  7.1 that are  otherwise  publicly  available.  You  will  maintain  the
confidentiality  of such Confidential  Information in accordance with procedures
adopted  by you in good  faith  to  protect  confidential  information  of third
parties delivered to you and will use such Confidential Information only for the
purposes of evaluating and administering your investment in the Notes,  PROVIDED
that you may deliver or disclose Confidential Information to

               (i) your directors,  officers,  employees,  agents, attorneys and
          affiliates (to the extent such  disclosure  reasonably  relates to the
          administration of the investment represented by your Notes),

               (ii) your financial advisors and other professional  advisors who
          agree to hold confidential the Confidential Information  substantially
          in accordance with the terms of this Section 20,

               (iii) any other holder,

               (iv) any  Institutional  Investor  to which  you sell or offer to
          sell such Note or any part  thereof or any  participation  therein (if
          such  Person  has  agreed  in  writing  prior to its  receipt  of such
          Confidential Information to be bound by the provisions of this Section
          20),

               (v) any  Institutional  Investor from which you offer to purchase
          any  Security  of the  Company  (if such  Person has agreed in writing
          prior to its receipt of such  Confidential  Information to be bound by
          the provisions of this Section 20),

               (vi)  any   federal  or  state   regulatory   authority   having
          jurisdiction over you,

               (vii) the National Association of Insurance Commissioners or any
          similar organization,  or any nationally recognized rating agency that
          requires access to information about your investment portfolio, or


<PAGE>
               (viii) any other Person to which such delivery or disclosure  may
          be necessary or  appropriate  (w) to effect  compliance  with any law,
          rule,  regulation  or order  applicable to you, (x) in response to any
          subpoena or other legal process, (y) in connection with any litigation
          to which you are a party or (z) if an Event of  Default  has  occurred
          and is  continuing,  to the extent you may  reasonably  determine such
          delivery  and  disclosure  to  be  necessary  or  appropriate  in  the
          enforcement  or for the  protection  of the rights and remedies  under
          your Notes and this Agreement.

Each holder,  by its  acceptance of a Note,  will be deemed to have agreed to be
bound by and to be entitled to the benefits of this Section 20 as though it were
a party to this Agreement.

21.  SUBSTITUTION OF PURCHASER.

     You shall have the right to  substitute  any one of your  Affiliates as the
purchaser  of the Notes that you have agreed to purchase  hereunder,  by written
notice  to the  Company,  which  notice  shall  be  signed  by both you and such
Affiliate,  shall  contain  such  Affiliate's  agreement  to be  bound  by  this
Agreement and shall  contain a  confirmation  by such  Affiliate of the accuracy
with respect to it of the  representations  set forth in Section 6. Upon receipt
of such notice, wherever the word "you" is used in this Agreement (other than in
this Section 21),  such word shall be deemed to refer to such  Affiliate in lieu
of you.  In the event  that such  Affiliate  is so  substituted  as a  purchaser
hereunder and such Affiliate  thereafter  transfers to you all of the Notes then
held by such Affiliate,  upon receipt by the Company of notice of such transfer,
wherever  the word "you" is used in this  Agreement  (other than in this Section
21), such word shall no longer be deemed to refer to such  Affiliate,  but shall
refer to you, and you shall have all the rights of an original holder under this
Agreement.

22.  MISCELLANEOUS.

     22.1 Successors and Assigns.

     All covenants  and other  agreements  contained in this  Agreement by or on
behalf  of any of the  parties  hereto  bind and inure to the  benefit  of their
respective successors and permitted assigns (including,  without limitation, any
subsequent holder of a Note) whether so expressed or not.

     22.2 Payments Due on Non-Business Days.

     If any payment due on, or with respect to, any Note shall fall due on a day
other than a Business  Day,  then such payment  shall be made on the first (1st)
Business Day  following  the day on which such payment shall have so fallen due,
PROVIDED  that if all or any portion of such payment  shall consist of a payment
of interest,  for purposes of calculating  such interest,  such payment shall be
deemed to have been originally due on such first (1st)  following  Business Day,
such interest shall accrue and be payable to (but not including) the actual date
of  payment  and the amount of the next  succeeding  interest  payment  shall be
adjusted accordingly.

     22.3 Severability.

     Any provision of this Agreement that is prohibited or  unenforceable in any
jurisdiction  shall,  as to such  jurisdiction,  be ineffective to the extent of
such  prohibition  or  unenforceability   without   invalidating  the  remaining
provisions  hereof,  and  any  such  prohibition  or   unenforceability  in  any
jurisdiction  shall (to the full  extent  permitted  by law) not  invalidate  or
render unenforceable such provision in any other jurisdiction.

     22.4 Construction.

     Each covenant contained herein shall be construed (absent express provision
to the contrary) as being  independent of each other covenant  contained herein,
so that  compliance  with any one  covenant  shall not  (absent  such an express
contrary  provision)  be deemed to excuse  compliance  with any other  covenant.
Where any provision herein refers to action to be taken by any Person,  or which
such Person is  prohibited  from  taking,  such  provision  shall be  applicable
whether such action is taken directly or indirectly by such Person.

     22.5 Counterparts.

     This Agreement may be executed in any number of counterparts, each of which
shall be an original but all of which together shall  constitute one instrument.
Each  counterpart may consist of a number of copies hereof,  each signed by less
than all, but together signed by all, of the parties hereto.

     22.6 Governing Law.

     THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE  WITH, AND THE
RIGHTS OF THE  PARTIES  SHALL BE  GOVERNED  BY, THE LAW OF THE STATE OF NEW YORK
EXCLUDING  CHOICE-OF-LAW  PRINCIPLES OF THE LAW OF SUCH STATE THAT WOULD REQUIRE
THE APPLICATION OF THE LAWS OF A JURISDICTION OTHER THAN SUCH STATE.

     22.7 Consent to Jurisdiction; Appointment of Agent.
<PAGE>


          (a)  Consent to  Jurisdiction.  THE  COMPANY  HEREBY  IRREVOCABLY  AND
     UNCONDITIONALLY  AGREES THAT ANY SUIT, ACTION OR PROCEEDING  ARISING OUT OF
     OR RELATING TO THIS AGREEMENT OR THE NOTES,  OR ANY ACTION OR PROCEEDING TO
     EXECUTE  OR  OTHERWISE  ENFORCE  ANY  JUDGMENT  IN  RESPECT  OF ANY  BREACH
     HEREUNDER OR THEREUNDER, BROUGHT BY ANY HOLDER OF NOTES AGAINST THE COMPANY
     OR ANY OF ITS  PROPERTY,  MAY BE  BROUGHT  BY SUCH  HOLDER  OF NOTES IN ANY
     FEDERAL  DISTRICT  COURT LOCATED IN NEW YORK CITY, NEW YORK OR ANY NEW YORK
     STATE COURT SITTING IN NEW YORK CITY, NEW YORK, AS SUCH HOLDER OF NOTES MAY
     IN ITS SOLE  DISCRETION  ELECT,  AND BY THE  EXECUTION AND DELIVERY OF THIS
     AGREEMENT,  THE  COMPANY  IRREVOCABLY  AND  UNCONDITIONALLY  SUBMITS TO THE
     NON-EXCLUSIVE IN PERSONAM  JURISDICTION OF EACH SUCH COURT, AND THE COMPANY
     IRREVOCABLY  WAIVES AND AGREES NOT TO ASSERT IN ANY  PROCEEDING  BEFORE ANY
     TRIBUNAL, BY WAY OF MOTION, AS A DEFENSE OR OTHERWISE, ANY CLAIM THAT IT IS
     NOT SUBJECT TO THE IN PERSONAM JURISDICTION OF ANY SUCH COURT. IN ADDITION,
     THE COMPANY HEREBY  IRREVOCABLY  WAIVES, TO THE FULLEST EXTENT PERMITTED BY
     LAW, ANY OBJECTION THAT IT MAY NOW OR HEREAFTER HAVE TO THE LAYING OF VENUE
     IN ANY SUIT,  ACTION  OR  PROCEEDING  ARISING  OUT OF OR  RELATING  TO THIS
     GUARANTY BROUGHT IN ANY SUCH COURT, AND HEREBY IRREVOCABLY WAIVES ANY CLAIM
     THAT ANY SUCH SUIT, ACTION OR PROCEEDING BROUGHT IN ANY SUCH COURT HAS BEEN
     BROUGHT IN AN INCONVENIENT FORUM. NOTHING HEREIN SHALL IN ANY WAY BE DEEMED
     TO LIMIT THE ABILITY OR RIGHT OF ANY HOLDER OF NOTES TO OBTAIN JURISDICTION
     OVER  THE  COMPANY  IN  SUCH  OTHER  JURISDICTION  AS MAY BE  PERMITTED  BY
     APPLICABLE LAW.

          (b) Agent for Service of Process.  THE COMPANY HEREBY  IRREVOCABLY AND
     UNCONDITIONALLY   AGREES  THAT  PROCESS  SERVED  EITHER  PERSONALLY  OR  BY
     REGISTERED  OR  CERTIFIED  MAIL  WITH  RETURN  RECEIPT  REQUESTED  (POSTAGE
     PREPAID) SHALL CONSTITUTE, TO THE EXTENT PERMITTED BY LAW, ADEQUATE SERVICE
     OF PROCESS IN ANY SUIT, ACTION OR PROCEEDING  ARISING OUT OF OR RELATING TO
     THIS  AGREEMENT  OR THE NOTES,  OR ANY ACTION OR  PROCEEDING  TO EXECUTE OR
     OTHERWISE  ENFORCE  ANY  JUDGMENT  IN RESPECT OF ANY  BREACH  HEREUNDER  OR
     THEREUNDER,  BROUGHT BY ANY HOLDER OF NOTES  AGAINST  THE COMPANY OR ANY OF
     ITS PROPERTY.  RECEIPT OF PROCESS SO SERVED SHALL BE CONCLUSIVELY  PRESUMED
     AS EVIDENCED BY A DELIVERY  RECEIPT  FURNISHED BY THE UNITED  STATES POSTAL
     SERVICE OR ANY COMMERCIAL DELIVERY SERVICE. WITHOUT LIMITING THE FOREGOING,
     THE COMPANY HEREBY  APPOINTS,  IN THE CASE OF ANY SUCH ACTION OR PROCEEDING
     BROUGHT IN THE COURTS OF OR IN THE STATE OF NEW YORK:

               CT CORPORATION SYSTEM
               1633 BROADWAY
               NEW YORK, NEW YORK 10019

     TO RECEIVE, FOR IT AND ON ITS BEHALF, SERVICE OF PROCESS. THE COMPANY SHALL
     AT ALL TIMES MAINTAIN AN AGENT FOR SERVICE OF PROCESS IN NEW YORK CITY, NEW
     YORK AND MAY FROM TIME TO TIME  APPOINT  SUCCEEDING  AGENTS FOR  SERVICE OF
     PROCESS BY NOTIFYING EACH HOLDER OF NOTES OF SUCH APPOINTMENT, WHICH AGENTS
     SHALL BE ATTORNEYS,  OFFICERS OR DIRECTORS OF THE COMPANY,  OR CORPORATIONS
     WHICH IN THE  ORDINARY  COURSE OF  BUSINESS  ACT AS AGENTS  FOR  SERVICE OF
     PROCESS.  NOTHING HEREIN SHALL IN ANY WAY BE DEEMED TO LIMIT THE ABILITY OR
     RIGHT OF ANY HOLDER OF NOTES TO SERVE ANY WRITS,  PROCESS OR  SUMMONSES  IN
     ANY MANNER PERMITTED BY APPLICABLE LAW.

     22.8 Defeasance.

          (a) Option of  Company.  Anything  to the  contrary  contained  herein
     notwithstanding,  the Company may, in its sole  discretion  and at any time
     upon not less than thirty (30) days' prior  written  notice to all holders,
     elect to establish a trust (the "TRUST"), solely in favor of all holders of
     the  Notes  then  outstanding,   and  irrevocably  and  absolutely  assign,
     transfer,  and convey to, and deposit into,  said Trust an amount of United
     States  Governmental  Securities  having  interest and  principal  payments
     sufficient  to pay in full all remaining  principal  and interest  payments
     and,  if any  principal  is to be  repaid  on a date  other  than  the date
     scheduled  therefor in Section 8.1, together with the Make-Whole Amount, if
     any, as the same shall fall due, in respect of all Notes then outstanding.


<PAGE>



          (b) Discharge. Provided that

               (i) the Trust, the trustee thereof,  and the terms and conditions
          (as well as the form and substance) of the indenture whereby the Trust
          shall have been  established  shall be reasonably  satisfactory to the
          Required Holders,

               (ii)  the  purchase  price  of  the  United  States  Governmental
          Securities  to be deposited  into the Trust shall have been fully paid
          by the Company,  and such United States Governmental  Securities shall
          have been so  deposited  into the Trust  (and each  holder  shall have
          received written verification thereof by the trustee of the Trust) and
          shall, as so deposited,  be unencumbered by any Lien and sufficient to
          pay all principal, interest and Make-Whole Amount, if any, to fall due
          on the Notes then outstanding as provided in Section 22.8(a) (and each
          holder shall have received written verification of such sufficiency by
          the independent  certified public  accountants of recognized  national
          standing selected by the Company),

               (ii) the Company shall have (A) paid in full all fees,  costs and
          expenses of the  trustee of the Trust and of all  holders  incurred in
          connection  with  the  preparation  of the  trust  indenture  and  the
          establishment  of  the  Trust,  including,   without  limitation,  all
          reasonable attorneys' fees and disbursements,  and (B) prepaid in full
          any and all fees,  costs and  expenses of the trustee of the Trust for
          the entire  term of the Trust (and the holders of the Notes shall have
          received written  confirmation from the trustee confirming its receipt
          of the  payments  required  to be made to it  pursuant  to this clause
          (iii)),

               (iv) the  Company  shall have no  continuing  legal or  equitable
          interest  in the Trust or the United  States  Governmental  Securities
          deposited  into the Trust (other than a  reversionary  interest in any
          such United States Governmental  Securities or the proceeds therefrom,
          remaining  after  the  full,  final and  indefeasible  payment  of the
          principal amount of the Notes and all interest and Make-Whole  Amount,
          if any,  thereon)  and shall have no right to direct or  instruct  the
          trustee of the Trust,  or to remove  such  trustee,  or  otherwise  to
          require  such  trustee to take any action with  respect to such United
          States Governmental Securities or otherwise,

               (v) no Event of Default  shall have occurred and be continuing at
          the time of such deposit,


<PAGE>


               (vi) the Company shall have delivered the written notice referred
          to in Section  22.8(a)  hereof to the holders  and a legal  opinion of
          Gardere Wynne Sewell & Riggs,  L.L.P. or other independent  counsel to
          the Company,  reasonably satisfactory to the Required Holders stating,
          among other things which the Required Holders may reasonably  request,
          that (A) the Trust is validly  created and duly  constituted  and that
          the sole beneficiaries  thereof are the holders, (B) the United States
          Governmental  Securities deposited therein were validly contributed to
          the Trust and  constitute a legal and valid RES of the Trust,  (C) the
          Company's  actions in creating the Trust and  contributing  the United
          States Governmental Securities thereto were duly authorized and valid,
          (D) the Company,  as the settlor of the Trust, has no right,  title or
          interest  in  and to  the  Trust  or the  RES  thereof  (other  than a
          reversionary interest in any United States Governmental Securities, or
          the proceeds thereof, remaining after the full, final and indefeasible
          payment  of the  principal  amount of the Notes and all  interest  and
          Make-Whole Amount, if any, thereon) and has no power of direction,  or
          right of removal, with respect to the trustee of the Trust, (E) if any
          of the events described in clause (g) or clause (h) of Section 11 were
          to  occur,  the  Trust  and the RES  thereof  would not be part of the
          estate  of the  Company  and (F) the  creation  of the  Trust  and the
          depositing of the United States Governmental  Securities therein shall
          not, for purposes of the Code with respect to any holder,  result in a
          taxable  event  whereby (I) such holder may become liable to pay a tax
          on any gain deemed to have arisen with respect to such  transaction or
          (II) such holder  shall have been deemed to have  suffered a loss with
          respect to such transaction,

               (vii all principal,  interest costs,  expenses and other sums due
          and  payable  to the  holders  under  the this  Agreement,  the  Other
          Agreements  and the Notes on the date the Trust is created  shall have
          been paid in full, and

               (viii) the Company shall have delivered to the holders an opinion
          of independent  certified  public  accountants of recognized  national
          standing  selected  by the  Company,  reasonably  satisfactory  to the
          Required Holders and prepared at the expense of the Company  (PROVIDED
          that  the  Company  shall  have  the  right  to  negotiate  with  such
          accountants  regarding the cost of furnishing  such opinion),  stating
          that under GAAP the  creation of the Trust and the  depositing  of the
          United States  Governmental  Securities therein shall not result, with
          respect to any  holder,  in an  exchange  of the Note or Notes of such
          holder for all or part of such United States  Governmental  Securities
          which  exchange  would result in a gain or loss being realized by such
          holder under GAAP in respect of such transaction,

     then,  and in  that  case,  all  obligations  of  the  Company  under  this
     Agreement,  the  Other  Agreements  and  the  Notes  shall  be  discharged;
     PROVIDED,  HOWEVER,  if the  contribution to the Trust of any United States
     Governmental  Securities  is  invalidated,  declared  to be  fraudulent  or
     preferential,  set  aside,  or  if  any  such  United  States  Governmental
     Securities are required to be returned or  redelivered  to the Company,  or
     any custodian,  trustee,  receiver or any other Person under any bankruptcy
     act,  state or federal law,  common law or equitable  cause,  then,  to the
     extent of such  invalidation,  return or redelivery,  the obligations under
     this  Agreement,  the Other  Agreements  and the Notes (less any  payments,
     which shall not have been themselves invalidated,  returned or redelivered,
     made  thereon  from  or  in  respect  of  the  United  States  Governmental
     Securities so invalidated,  returned or  redelivered)  shall be revived and
     restored.

     22.9 GAAP.

     Where the  character  or amount of any asset or liability or item of income
or expense, or any consolidation or other accounting  computation is required to
be made for any purpose  hereunder,  it shall be done in accordance with GAAP as
in effect on the date of, or at the end of the period  covered by, the financial
statements from which such asset, liability, item of income, or item of expense,
is derived, or, in the case of any such computation, as in effect on the date as
of which such  computation is required to be determined,  provided,  that if any
term defined herein includes or excludes  amounts,  items or concepts that would
not be  included in or  excluded  from such term if such term was  defined  with
reference solely to generally accepted accounting principles,  such term will be
deemed to  include or  exclude  such  amounts,  items or  concepts  as set forth
herein.

     22.10 Usury.

     It is the  intention  of the parties  hereto to comply with all  applicable
usury laws; accordingly,  it is agreed that notwithstanding any provision to the
contrary  herein or in the Notes,  or in any of the documents  securing  payment
thereof or  otherwise  relating  hereto,  no such  provision  shall  require the
payment or permit the  collection  of  interest  in excess of the  highest  rate
allowed by  applicable  law (the "MAXIMUM  RATE").  If any excess of interest in
such respect is provided  for, or shall be  adjudicated  to be so provided  for,
herein or in the Notes or in any of the documents  securing  payment  thereof or
otherwise relating hereto, then in such event

          (a) the provisions of this Section 22.10 shall govern and control,

          (b) neither the Company,  endorsers or  Restricted  Subsidiaries,  nor
     their heirs,  legal  representatives,  successors  or assigns nor any other
     party  liable for the payment on the Notes,  shall be  obligated to pay the
     amount of such  interest  to the extent that it is in excess of the Maximum
     Rate,

          (c) any such excess with  respect to any such Note which may have been
     collected  shall,  at the  election  of the holder of such Note,  be either
     applied as a credit against the then unpaid  principal  amount on such Note
     or refunded to the Company, and

          (d) the provisions hereof and of the Notes and any documents  securing
     payment thereof shall be automatically  reformed so that the effective rate
     of  interest  shall be  reduced to the  Maximum  Rate.  For the  purpose of
     determining  the Maximum Rate,  all interest  payments with respect  hereto
     shall be  amortized,  prorated and spread  throughout  the full term of the
     Notes  so  that  the  effective  rate of  interest  thereunder  is  uniform
     throughout the term thereof.

                       [Next page is the signature page.]


<PAGE>


     If you are in  agreement  with  the  foregoing,  please  sign  the  form of
agreement on the accompanying counterpart of this Agreement and return it to the
Company,  whereupon the foregoing shall become a binding  agreement  between you
and the Company.

                                      Very truly yours,

                                      SEITEL, INC.



                                      By /s/ Debra D. Valice
                                        -------------------------------
                                      Name: Debra D. Valice
                                      Title: Executive Vice President of Finance

The foregoing is hereby
agreed to as of the
date thereof.

[Separately executed by each of the
following Purchasers.]

PRINCIPAL LIFE INSURANCE COMPANY,
By Principal Capital Management, LLC,
a Delaware limited liability company,
its authorized signatory

By /s/ Jon C. Heiny
   -----------------------------------
Name:  Jon C. Heiny
Its:  Counsel


By /s/ James C. Fifield
   -----------------------------------
Name:  James C. Fifeld
Its:  Counsel

<PAGE>

PRINCIPAL LIFE INSURANCE COMPANY,
ON BEHALF OF ONE OR MORE SEPARATE ACCOUNTS,
By Principal Capital Management, LLC,
a Delaware limited liability company,
its authorized signatory

By /s/ Jon C. Heiny
   -----------------------------------
Name:  Jon C. Heiny
Its:  Counsel

By /s/ James C. Fifield
   -----------------------------------
Name:  James C. Fifeld
Its:  Counsel


COMMERCIAL UNION LIFE INSURANCE
COMPANY OF AMERICA,
a Delaware Corporation, by its attorney in fact,
Principal Life Insurance Company,
an Iowa corporation

By /s/ Jon C. Heiny
   -----------------------------------
Name:  Jon C. Heiny
Its:  Counsel

By /s/ James C. Fifield
   -----------------------------------
Name:  James C. Fifeld
Its:  Counsel


ALLSTATE LIFE INSURANCE COMPANY

By /s/ Charles D. Mires
   -----------------------------------
Name:  Charles D. Mires

By /s/ Patricia W. Wilson
   -----------------------------------
Name:  Patricia W. Wilson

     Authorized Signatories


PROVIDENT LIFE AND ACCIDENT INSURANCE COMPANY
By:  Provident Investment Management, LLC
Its Agent

By /s/ David Fussell
   -----------------------------------
Name:  David Fussell
Title:  Vice President


THE PAUL REVERE LIFE INSURANCE COMPANY
By:  Provident Investment Management, LLC
Its Agent

By /s/ David Fussell
   -----------------------------------
Name:  David Fussell
Title:  Vice President


C.M. LIFE INSURANCE COMPANY

By /s/ Richard C. Morrison
   -----------------------------------
Name:  Richard C. Morrison
Title:  Investment Officer


MASSACHUSETTS MUTUAL LIFE INSURANCE COMPANY

By /s/ Richard C. Morrison
   -----------------------------------
Name:  Richard C. Morrison
Title:  Managing Director


UNITED OF OMAHA LIFE INSURANCE COMPANY

By /s/ Edwin H. Garrison Jr.
   -----------------------------------
Name:  Edwin H. Garrison Jr.
Title:  First Vice President


PHOENIX HOME LIFE MUTUAL INSURANCE COMPANY

By /s/ Laurence P. Fleming
   -----------------------------------
Name:  Laurence P. Fleming
Title:  Vice President


RELIASTAR LIFE INSURANCE COMPANY

By /s/ James V. Wittich
   -----------------------------------
Name:  James V. Witich
Title:  Authorized Representative


NORTHERN LIFE INSURANCE COMPANY

By /s/ James V. Wittich
   -----------------------------------
Name:  James V. Wittich
Title:  Assistant Treasurer


RELIASTAR LIFE INSURANCE COMPANY OF NEW YORK

By /s/ James V. Wittich
   -----------------------------------
Name:  James V. Witich
Title:  Vice President, Investments


SECURITY CONNECTICUT LIFE INSURANCE COMPANY

By /s/ James V. Wittich
   -----------------------------------
Name:  James V. Witich
Title:  Assistant Treasurer


THE TRAVELERS INSURANCE COMPANY

By /s/ John F. Gilsenan
   -----------------------------------
Name:  John F. Gilsenan
Title:  Second Vice President


TRUSTMARK LIFE INSURANCE CO.

By /s/ Jerry Hitpas
   -----------------------------------
Name:  Jerry Hitpas
Title:  Sr. Vice President


PAN-AMERICAN LIFE INSURANCE COMPANY

By /s/ F.A. Stone
   -----------------------------------
Name:  F. Anderson Stone
Title:  Vice President Corporate Securities


REPUBLIC WESTERN INSURANCE COMPANY

By /s/ Kristin Spears
   -----------------------------------
Name:  Kristin Spears
Title:  Asst. Vice President Investments


OXFORD LIFE INSURANCE COMPANY

By /s/ Larry D. Goodyear
   -----------------------------------
Name:  Larry D. Goodyear
Title:  Sr. Vice President


UNITED LIFE INSURANCE COMPANY

By /s/ J. Scott McIntyre, Jr.
   -----------------------------------
Name:  J. Scott McIntyre, Jr.
Title:  Chairman

<PAGE>


                                   SCHEDULE A

                       INFORMATION RELATING TO PURCHASERS

- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PRINCIPAL LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         PRINCIPAL LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RD-1; $6,900,000
Principal Amount                         RD-2; $1,000,000
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             ABA #073000228
                                         Norwest Bank Iowa, N.A.
                                         7th and Walnut Streets
                                         Des Moines, Iowa 50309
                                         For credit to Principal Life Insurance
                                         Company
                                         Account No. 0000014752
                                         Bond No. 1-B-62003
                                         OBI PFGSE (S) B0062003()Seitel
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.03% Series D
                                                            Senior Notes due
                                                            2004
                                         Security Number:   816074 B* 8
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0960
                                         Attn:  Investment Accounting -
                                         Securities
                                         Fax:  (515) 248-2643
                                         Tel:  (515) 247-0689
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0800
                                         Attn:  Investment - Securities
                                         Fax:  (515) 248-2490
                                         Tel:  (515) 248-3495
- ---------------------------------------- ---------------------------------------
Other Instructions                       PRINCIPAL LIFE INSURANCE COMPANY
                                         By Principal Capital Management, LLC,
                                         a Delaware limited liability
                                         company, its authorized signatory
                                         By_______________________
                                         Its:
                                         By_______________________
                                         Its:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Jon C. Heiny, Esq.
                                         Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0301
                                         Tel:  515-246-7522
- ---------------------------------------- ---------------------------------------
Tax Identification Number                42-0127290
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PRINCIPAL LIFE INSURANCE COMPANY ON
                                         BEHALF OF ONE OR MORE SEPARATE
                                         ACCOUNTS
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         PRINCIPAL LIFE INSURANCE COMPANY ON
                                         BEHALF OF ONE OR MORE SEPARATE
                                         ACCOUNTS
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RD-3; $2,100,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Citibank New York
                                         ABA #021000089 To Credit Account No.
                                         36858201
                                         For Further Credit to Principal Life-
                                         Dupont Separate Account No. 847958
                                         Bond No. 800-B-62003
                                         OBI PFGSE (S) B0062043()Seitel
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.03% Series D
                                                            Senior Notes due
                                                            2004
                                         Security Number:   816074 B* 8
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0960
                                         Attn:  Investment Accounting -
                                         Securities
                                         Fax:  (515) 248-2643
                                         Tel:  (515) 247-0689
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0800
                                         Attn:  Investment - Securities
                                         Fax:  (515) 248-2490
                                         Tel:  (515) 248-3495
- ---------------------------------------- ---------------------------------------
Other                                    Instructions  PRINCIPAL  LIFE INSURANCE
                                         COMPANY,  ON  BEHALF  OF  ONE  OR  MORE
                                         SEPARATE ACCOUNTS, By Principal Capital
                                         Management,  LLC,  a  Delaware  limited
                                         liability   company,   its   authorized
                                         signatory
                                         By_______________________
                                         Its:
                                         By_______________________
                                         Its:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Jon C. Heiny, Esq.
                                         Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0301
                                         Tel:  515-246-7522
- ---------------------------------------- ---------------------------------------
Tax Identification Number                42-0127290
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PRINCIPAL LIFE INSURANCE COMPANY ON
                                         BEHALF OF ONE OR MORE SEPARATE
                                         ACCOUNTS
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         PRINCIPAL LIFE INSURANCE COMPANY
                                         ON BEHALF OF ONE OR MORE SEPARATE
                                         ACCOUNTS
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-1; $8,500,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             ABA #073000228
                                         Norwest Bank Iowa, N.A.
                                         7th and Walnut Streets
                                         Des Moines, IA 50309
                                         For credit to Principal Life Insurance
                                         Company
                                         Account No. 0000032395
                                         Bond No. 16-B-62004
                                         OBI PFGSE (S) B0062004()Seitel
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0960
                                         Attn:  Investment Accounting -
                                         Securities
                                         Fax:  (515) 248-2643
                                         Tel:  515-247-0689
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0800
                                         Attn:  Investment - Securities
                                         Fax:  (515) 248-2490
                                         Tel:  515-248-3495
- ---------------------------------------- ---------------------------------------
Other                                    Instructions  PRINCIPAL  LIFE INSURANCE
                                         COMPANY,  ON  BEHALF  OF  ONE  OR  MORE
                                         SEPARATE ACCOUNTS, By Principal Capital
                                         Management,  LLC,  a  Delaware  limited
                                         liability   company,   its   authorized
                                         signatory
                                         By_______________________
                                         Its:
                                         By_______________________
                                         Its:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Jon C. Heiny, Esq.
                                         Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0301
                                         Tel:  515-246-7522
- ---------------------------------------- ---------------------------------------
Tax Identification Number                42-0127290
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           COMMERCIAL UNION LIFE INSURANCE COMPANY
                                         OF AMERICA
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         COMMERCIAL UNION LIFE INSURANCE COMPANY
                                         OF AMERICA
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-2; $1,500,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             First Union (Philadelphia)
                                         ABA #031201467
                                         1500 Market Street
                                         Philadelphia, PA 19102-2509
                                         Attn:  Joe Aman
                                         DDA 5000012398064
                                         Bond No. 400-B-62004
                                         For further credit to Account No.
                                         060073-02-4 (Commercial Union Life
                                         Insurance Company of America/Principal)
- --------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Commercial Union Life Insurance Company
                                         of America
                                         c/o Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0960
                                         Attn:  Investment Accounting -
                                         Securities
                                         Fax:  (515) 248-2643
                                         Tel:  (515) 247-0689
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Commercial Union Life Insurance Company
                                         of America
                                         c/o Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0800
                                         Attn:  Investment - Securities - Jon
                                         Davidson
                                         Fax:  (515) 248-2490
                                         Tel:  515-248-3495
- ---------------------------------------- ---------------------------------------
Other Instructions                       COMMERCIAL UNION LIFE INSURANCE COMPANY
                                         OF AMERICA,
                                         a Delaware corporation, by its attorney
                                         in  fact,   Principal   Life  Insurance
                                         Company of America, an Iowa corporation
                                         By_______________________
                                         Its:
                                         By_______________________
                                         Its:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Jon C. Heiny, Esq.
                                         Commercial Union Life Insurance Company
                                         of America
                                         c/o Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0301
                                         Tel:  515-246-7522
- ---------------------------------------- ---------------------------------------
Tax Identification Number                42-0127290
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PRINCIPAL LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         PRINCIPAL LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RF-1; $12,000,000
Principal Amount                         RF-2; $1,000,000
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             ABA #073000228
                                         Norwest Bank Iowa, N.A.
                                         7th and Walnut Streets
                                         Des Moines, Iowa 50309
                                         For credit to Principal Life Insurance
                                         Company
                                         Account No. 0000014752
                                         Bond No. 1-B-62005
                                         OBI PFGSE (S) B0062005()Seitel
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.43% Series F
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B# 4
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0960
                                         Attn:  Investment Accounting -
                                         Securities
                                         Fax:  (515) 248-2643
                                         Tel:  (515) 247-0689
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0800
                                         Attn:  Investment - Securities
                                         Fax:  (515) 248-2490
                                         Tel:  (515) 248-3495
- ---------------------------------------- ---------------------------------------
Other Instructions                       PRINCIPAL LIFE INSURANCE COMPANY,
                                         By Principal Capital Management, LLC,
                                         a Delaware limited liability
                                         company, its authorized signatory
                                         By_______________________
                                         Its:
                                         By_______________________
                                         Its:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Jon C. Heiny, Esq.
                                         Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0301
                                         Tel:  (515) 246-7522
- ---------------------------------------- ---------------------------------------
Tax Identification Number                42-0127290
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PRINCIPAL LIFE INSURANCE COMPANY ON
                                         BEHALF OF ONE OR MORE SEPARATE
                                         ACCOUNTS
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         PRINCIPAL LIFE INSURANCE COMPANY ON
                                         BEHALF OF ONE OR MORE SEPARATE
                                         ACCOUNTS
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RF-3; $2,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             ABA #073000228
                                         Norwest Bank Iowa, N.A.
                                         7th and Walnut Streets
                                         Des Moines, Iowa 50309
                                         For credit to Principal Life Insurance
                                         Company
                                         Account No. 0000032395
                                         Bond No. 16-B-62005
                                         OBI PFGSE (S) B0062005()Seitel
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.43% Series F
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B# 4
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0960
                                         Attn:  Investment Accounting -
                                         Securities
                                         Fax:  (515) 248-2643
                                         Tel:  (515) 247-0689
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0800
                                         Attn:  Investment - Securities
                                         Fax:  (515) 248-2490
                                         Tel:  (515) 248-3495
- ---------------------------------------- ---------------------------------------
Other                                    Instructions  PRINCIPAL  LIFE INSURANCE
                                         COMPANY,  ON  BEHALF  OF  ONE  OR  MORE
                                         SEPARATE ACCOUNTS, By Principal Capital
                                         Management,  LLC,  a  Delaware  limited
                                         liability   company,   its   authorized
                                         signatory
                                         By_______________________
                                         Its:
                                         By_______________________
                                         Its:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Jon C. Heiny, Esq.
                                         Principal Capital Management, LLC
                                         801 Grand Avenue
                                         Des Moines, Iowa 50392-0301
                                         Tel:  (515) 246-7522
- ---------------------------------------- ---------------------------------------
Tax Identification Number                42-0127290
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           ALLSTATE LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         ALLSTATE LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RD-4; $5,000,000
Principal Amount                         RE-3; $5,000,000
                                         RF-4; $5,000,000
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             BBK -    Harris Trust and Savings Bank
                                                  ABA #071000288
                                         BNF -    Allstate Life Insurance
                                                  Company
                                                  Collection Account #168-117-0
                                         ORG -    Seitel, Inc.
                                         OBI -    DPP   -   (Enter   Private
                                                  Placement  No., if  available)
                                                  Payment  Due  Date  (MM/DD/YY)
                                                  P___  (Enter  "P" & amount  of
                                                  principal being remitted,  for
                                                  example,    P5000000.00)   I__
                                                  (Enter   "I"   &   amount   of
                                                  interest being  remitted,  for
                                                  example, I225000.00)
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.03% Series D
                                                            Senior Notes due
                                                            2004
                                         Security Number:   816074 B* 8
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Description of
                                         Security:          7.43% Series F
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B# 4
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Allstate Insurance Company
                                         Investment Operations - Private
                                         Placements
                                         3075 Sanders Road, STE G4A
                                         Northbrook, IL 60062-7127
                                         Tel:  (847) 402-2769
                                         Fax:  (847) 326-5040
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Allstate Life Insurance Company
                                         Private Placements Department
                                         3075 Sanders Road, STE G3A
                                         Northbrook, IL 60062-7127
                                         Tel:  (847) 402-4394
                                         Fax:  (847) 402-3092
- ---------------------------------------- ---------------------------------------
Other Instructions                       ALLSTATE LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         By_______________________
                                         Name:
                                                  Authorized Signatories
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Citibank, Federal Savings Bank
                                         U.S. Custody & Employee Benefit Trust
                                         500 W. Madison Street, Floor 6, Zone 4
                                         Chicago, IL 60661-2591
                                         Attention: Ellen Lorden
                                         For Allstate Life Insurance Company/
                                         Safekeeping Account No. 846627
- ---------------------------------------- ---------------------------------------
Tax Identification Number                36-2554642
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------

PURCHASER NAME                           ALLSTATE LIFE INSURANCE COMPANY/
                                         NORTHBROOK LIFE INSURANCE COMPANY -
                                         TRUST
- ---------------------------------------- ---------------------------------------
Name                                     in Which Note is  Registered  CITIBANK,
                                         FEDERAL   SAVINGS  BANK  AS  COLLATERAL
                                         AGENT AND  TRUSTEE  UNDER THE  SECURITY
                                         AND   TRUST   AGREEMENT   DATED  AS  OF
                                         SEPTEMBER  1,  1993   (NORTHBROOK  LIFE
                                         INSURANCE  COMPANY,  SECURED  PARTY AND
                                         BENEFICIARY)
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RD-5; $5,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             BBK -    Harris Trust and Savings Bank
                                                  ABA #071000288
                                         BNF -    Allstate Life Insurance
                                                  Company
                                                  Collection Account #168-124-6
                                         ORG -    Seitel, Inc.
                                         OBI -    DPP   -   (Enter   Private
                                                  Placement  No., if  available)
                                                  Payment  Due  Date  (MM/DD/YY)
                                                  P___  (Enter  "P" & amount  of
                                                  principal being remitted,  for
                                                  example,    P5000000.00)   I__
                                                  (Enter   "I"   &   amount   of
                                                  interest being  remitted,  for
                                                  example, I225000.00)
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.03% Series D
                                                            Senior Notes due
                                                            2004
                                         Security Number:   816074 B* 8
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Allstate Insurance Company
                                         Investment Operations - Private
                                         Placements
                                         3075 Sanders Road, STE G4A
                                         Northbrook, IL 60062-7127
                                         Tel:  (847) 402-2769
                                         Fax:  (847) 326-5040
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Allstate Life Insurance Company
                                         Private Placements Department
                                         3075 Sanders Road, STE G3A
                                         Northbrook, IL 60062-7127
                                         Tel:  (847) 402-4394
                                         Fax:  (847) 402-3092
- ---------------------------------------- ---------------------------------------
Other Instructions                       ALLSTATE LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         By_______________________
                                         Name:
                                                  Authorized Signatories
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Citibank, Federal Savings Bank
                                         U.S. Custody & Employee Benefit Trust
                                         500 W. Madison Street, Floor 6, Zone 4
                                         Chicago, IL 60661-2591
                                         Attention: Ellen Lorden
                                         For Allstate Life Insurance Company/
                                         Safekeeping Account No. 846635
- ---------------------------------------- ---------------------------------------
Tax Identification Number                36-2554642
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PROVIDENT LIFE AND ACCIDENT INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         CUDD & CO.
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RF-5; $10,000,000
Principal Amount                         RF-6; $5,000,000
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             CUDD & Co.
                                         c/o The Chase Manhattan Bank
                                         New York, NY
                                         ABA No. 021 000 021
                                         SSG Private Income Processing
                                         A/C #900-9-000200
                                         Custodial Account No. G06704
                                         Please reference: Issuer
                                                           PPN
                                                           Coupon
                                                           Maturity
                                                           Principal - $________
                                                           Interest - $_________
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.43% Series F
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B# 4
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Provident Investment Management, LLC
                                         Private Placements
                                         One Fountain Square
                                         Chattanooga, Tennessee 37402
                                         Tel:  (423) 755-1365
                                         Fax:  (423) 755-3351
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Provident Investment Management, LLC
                                         Private Placements
                                         One Fountain Square
                                         Chattanooga, Tennessee 37402
                                         Tel:  (423) 755-1365
                                         Fax:  (423) 755-3351
- ---------------------------------------- ---------------------------------------
Other Instructions                       PROVIDENT LIFE AND ACCIDENT INSURANCE
                                         COMPANY
                                         By: PROVIDENT INVESTMENT MANAGEMENT,LLC
                                         Its: Agent
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        R. Brendan Olin, Esq.
                                         Provident Companies, Inc.
                                         Law Department
                                         One Fountain Square
                                         Chattanooga, Tennessee 37402
                                         Tel:  (423) 755-7282
- ---------------------------------------- ---------------------------------------
Tax Identification Number                13-6022143 (CUDD & CO.)
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           THE PAUL REVERE LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         CUDD & CO.
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RF-7; $5,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             CUDD & Co.
                                         c/o The Chase Manhattan Bank
                                         New York, NY
                                         ABA No. 021 000 021
                                         SSG Private Income Processing
                                         A/C #900-9-000200
                                         Custodial Account No. G06992
                                         Please reference: Issuer
                                                           PPN
                                                           Coupon
                                                           Maturity
                                                           Principal - $________
                                                           Interest - $_________
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.43% Series F
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B# 4
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Provident Investment Management, LLC
                                         Private Placements
                                         One Fountain Square
                                         Chattanooga, Tennessee 37402
                                         Tel:  (423) 755-1365
                                         Fax:  (423) 755-3351
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Provident Investment Management, LLC
                                         Private Placements
                                         One Fountain Square
                                         Chattanooga, Tennessee 37402
                                         Tel:  (423) 755-1365
                                         Fax:  (423) 755-3351
- ---------------------------------------- ---------------------------------------
Other Instructions                       THE PAUL REVERE LIFE INSURANCE COMPANY
                                         By:  PROVIDENT INVESTMENT MANAGEMENT,
                                         LLC
                                         Its: Agent
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        R. Brendan Olin, Esq.
                                         Provident Companies, Inc.
                                         Law Department
                                         One Fountain Square
                                         Chattanooga, Tennessee 37402
                                         Tel:  (423) 755-7282
- ---------------------------------------- ---------------------------------------
Tax Identification Number                13-6022413 (CUDD & CO.)
- ---------------------------------------- ---------------------------------------

<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-4; $5,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Citibank, N.A.
                                         111 Wall Street
                                         New York, NY 10043
                                         ABA No. 021000089
                                         For MassMutual Long-Term Pool
                                         Account No. 4067-3488
                                         with telephonic advice of payment to
                                         the Securities Custody and
                                         Collection Department of Massachusetts
                                         Mutual Life Insurance Company at
                                         (413) 744-3561
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn:  Securities and Custody
                                         Collection Department, F381
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn: Securities Investment Division
- ---------------------------------------- ---------------------------------------
Other Instructions                       MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Elliot S. Cohen, Esq.
                                         Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111-0001
                                         Tel:  413-744-5847
- ---------------------------------------- ---------------------------------------
Tax Identification Number                04-1590850
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-5; $2,500,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Chase Manhattan Bank, N.A.
                                         4 MetroTech Center
                                         New York, NY 10081
                                         ABA No. 021000021
                                         For MassMutual Pension Management
                                         Account No. 910-2594018
                                         with telephonic advice of payment to
                                         the Securities Custody and
                                         Collection Department of Massachusetts
                                         Mutual Life Insurance Company at
                                         (413) 744-3561
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn:  Securities and Custody
                                         Collection Department, F381
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn: Securities Investment Division
- ---------------------------------------- ---------------------------------------
Other Instructions                       MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Elliot S. Cohen, Esq.
                                         Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111-0001
                                         Tel:  413-744-5847
- ---------------------------------------- ---------------------------------------
Tax Identification Number                04-1590850
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-6; $2,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Chase Manhattan Bank, N.A.
                                         4 Chase MetroTech Center
                                         New York, NY 10081
                                         ABA No. 021000021
                                         For MassMutual IFM Non-Traditional
                                         Account No. 910-2509073
                                         with telephonic advice of payment to
                                         the Securities Custody and
                                         Collection Department of Massachusetts
                                         Mutual Life Insurance Company at
                                         (413) 744-3561
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn:  Securities and Custody
                                         Collection Department, F381
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn: Securities Investment Division
- ---------------------------------------- ---------------------------------------
Other Instructions                       MASSACHUSETTS MUTUAL LIFE INSURANCE
                                         COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Elliot S. Cohen, Esq.
                                         Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111-0001
                                         Tel:  413-744-5847
- ---------------------------------------- ---------------------------------------
Tax Identification Number                04-1590850
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           C.M. LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         C.M. LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-7; $500,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Citibank, N.A.
                                         111 Wall Street
                                         New York, NY 10043
                                         ABA No. 021000089
                                         For Segment 43 - Universal Life
                                         Account No. 4068-6561
                                         with telephonic advice of payment to
                                         the Securities Custody and
                                         Collection Department of Massachusetts
                                         Mutual Life Insurance Company at
                                         (413) 744-3561
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  C.M. Life Insurance Company
                                         c/o Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn:  Securities and Custody
                                         Collection Department, F381
- ---------------------------------------- ---------------------------------------
Address for All other Notices            C.M. Life Insurance Company
                                         c/o Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111
                                         Attn: Securities Investment Division
- ---------------------------------------- ---------------------------------------
Other Instructions                       C.M. LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Elliot S. Cohen, Esq.
                                         Massachusetts Mutual Life Insurance
                                         Company
                                         1295 State Street
                                         Springfield, MA 01111-0001
                                         Tel:  413-744-5847
- ---------------------------------------- ---------------------------------------
Tax Identification Number                06-1041383
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           UNITED OF OMAHA LIFE INSURANCE COMPANY
Name in Which Note is Registered         UNITED OF OMAHA LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-8; $10,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Chase Manhattan Bank
                                         ABA #021000021
                                         Private Income Processing
                                         For credit to:  United of Omaha Life
                                         Insurance Company
                                         Account #900-9000200
                                         a/c: G07097
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  The Chase Manhattan Bank
                                         4 New York Plaza, 13th Floor
                                         New York, NY 10004
                                         Attn: Income Processing - J. Pipperato
                                         a/c: G07097
- ---------------------------------------- ---------------------------------------
Address for All other Notices            United of Omaha Life Insurance Company
                                         4 - Investment Loan Administration
                                         Mutual of Omaha Plaza
                                         Omaha, NE 68175-1011
- ---------------------------------------- ---------------------------------------
Other Instructions                       UNITED OF OMAHA LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        The Chase Manhattan Bank
                                         North America Insurance - 6th Floor
                                         Attn:  Ann Marie Mazza
                                         3 Chase Metrotech Center
                                         Brooklyn, NY 11245
- ---------------------------------------- ---------------------------------------
Tax Identification Number                47-0322111
- --------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PHOENIX HOME LIFE MUTUAL INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         PHOENIX HOME LIFE MUTUAL INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-9; $10,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             ABA No. 021 000 021
                                         Chase Manhattan Bank, N.A.
                                         New York, NY
                                         Account No.:  900 9000 200
                                         Account Name:  Income Processing
                                         Reference:  Phoenix Home Life Acct.
                                                     #G05413
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Phoenix Home Life Mutual Insurance
                                         Company
                                         c/o Phoenix Investment Partners, Ltd.
                                         56 Prospect Street
                                         P.O. Box 1504080
                                         Hartford, Connecticut 06115-0480
                                         Attention:  Private Placements Division
                                         Fax:  (860) 403-5451
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Phoenix Home Life Mutual Insurance
                                         Company
                                         c/o Phoenix Investment Partners, Ltd.
                                         56 Prospect Street
                                         P.O. Box 1504080
                                         Hartford, Connecticut 06115-0480
                                         Attention:  Private Placements Division
                                         Fax:  (860) 403-5451
- ---------------------------------------- ---------------------------------------
Other Instructions                       PHOENIX HOME LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        John T. Mulrain, Esq.
                                         Phoenix Home Life Mutual Insurance
                                         Company
                                         One American Row
                                         Hartford, CT 06115
                                         Tel:  860-403-5799
- ---------------------------------------- ---------------------------------------
Tax Identification Number                06-0493340
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           RELIASTAR LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         RELIASTAR LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-10; $1,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             US Bank N.A./Mpls
                                         601 2nd Ave. S., Mpls, MN
                                         Bank ABA # 091000022
                                         Acct Name:  ReliaStar Life Insurance Co
                                         Acc. #110240014461
                                         Attn:  Securities Accounting
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of

                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@6

                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  ReliaStar Investment Research
                                         100 Washington Avenue South
                                         Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5257
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Address for All other Notices            ReliaStar Investment Research
                                         100 Washington Avenue South
                                         Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5257
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Other Instructions                       RELIASTAR LIFE INSURANCE COMPANY

                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Attn: Bret Brunner
- ---------------------------------------- ---------------------------------------
Tax Identification Number                41-0451140
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           NORTHERN LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         NORTHERN LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-11; $5,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             US Bank N.A./Mpls
                                         601 2nd Ave. S.
                                         Act. #160232376105
                                         Bank ABA # 091000022
                                         Attn: Securities Accounting
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5773
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Address for All other Notices            ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5773
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Other Instructions                       NORTHERN LIFE INSURANCE COMPANY

                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Attn: Bret Brunner
- ---------------------------------------- ---------------------------------------
Tax Identification Number                41-1295933
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           RELIASTAR LIFE INSURANCE COMPANY OF NEW
                                         YORK
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         SIGLER & CO.
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-12; $2,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Chase Manhattan Bank
                                         New York, NY
                                         A/C #900-9-000200
                                         F/F/C #G53095 ReliaStar Life of New
                                         York
                                         Bank ABA #021000021
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5257
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Address for All other Notices            ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5257
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Other Instructions                       RELIASTAR LIFE INSURANCE COMPANY OF NEW
                                         YORK
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Attn: Bret Brunner
- ---------------------------------------- ---------------------------------------
Tax Identification Number                53-0242530
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           SECURITY CONNECTICUT LIFE INSURANCE
                                         COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         SIGLER & CO.
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-13; $2,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Chase Manhattan Bank
                                         New York, New York
                                         ABA #: 021-000-021
                                         Beneficiary Account #: 544755102
                                         Reference: Sigler & Co. (Nominee Name)
                                         Tax I.D. #: 13-3641527
                                         F/C #G54426
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5257
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Address for All other Notices            ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Ref:  Private Placements
                                         Tel:  (612) 372-5257
                                         Fax:  (612) 372-5368
- ---------------------------------------- ---------------------------------------
Other Instructions                       SECURITY CONNECTICUT LIFE INSURANCE
                                         COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        ReliaStar Investment Research, Inc.
                                         100 Washington Avenue South, Suite 800
                                         Minneapolis, MN 55401-2121
                                         Attn: Bret Brunner
- ---------------------------------------- ---------------------------------------
Tax Identification Number                35-1468921
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           THE TRAVELERS INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         TRAL & CO.
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-14; $10,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Chase Manhattan Bank
                                         NY, NY
                                         ABA Number 021-0000-21
                                         REF:  Travelers Private Placement Acct.
                                         Account Number 910-2-587434
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  The Travelers Insurance Company
                                         1 Tower Square  10PB
                                         Hartford, Conn.  06183-2030
                                         Contact:  John J. Console
                                         (860) 277-0940
                                         Fax:     (860) 277-2299
- ---------------------------------------- ---------------------------------------
Address for All other Notices            The Travelers Insurance Company
                                         1 Tower Square  9PB
                                         Hartford, Conn.  06183-2030
                                         Contact:  Allen Cantrell (860) 954-2396
                                         Fax:     (860) 954-5243
- ---------------------------------------- ---------------------------------------
Other Instructions                       THE TRAVELERS INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Law Department of Purchaser
- ---------------------------------------- ---------------------------------------
Tax Identification Number                06-0566090
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           TRUSTMARK LIFE INSURANCE CO.
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         GERLACH & CO.
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-15; $5,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Citibank, NYC/CUST.
                                         ABA #021-000-089
                                         Customer A/C #846607
                                         Attn:  ADCOM 657-9174
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Citibank N.A.
                                         20 Exchange Place
                                         Level C
                                         New York, NY 10043
                                         Account #846607
                                         Attn:  Keith Whyte
                                         Tel:  (212) 825-6548
                                         with a copy to:
                                         Trustmark Life Insurance Co.
                                         Attn:  Judy Simms, Treasury
                                         400 Field Drive
                                         Lake Forest, Illinois 60045-2581
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Trustmark Life Insurance Co.
                                         Attn:  Jerry Hitpas
                                         400 Field Drive
                                         Lake Forest, Illinois 60045-2581
- ---------------------------------------- ---------------------------------------
Other Instructions                       TRUSTMARK LIFE INSURANCE CO.
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Trustmark Life Insurance Co.
                                         Attn:  Jerry Hitpas
                                         400 Field Drive
                                         Lake Forest, Illinois 60045-2581
- ---------------------------------------- ---------------------------------------
Tax Identification Number                36-3421358
- ---------------------------------------- ---------------------------------------



<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           PAN-AMERICAN LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         PAN-AMERICAN LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RF-8; $3,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Bank One, Louisiana, NA
                                         ABA #065400137
                                         201 St. Charles Avenue
                                         New Orleans, LA 70170
                                         For the account of:  Pan-American Life
                                         Insurance Company
                                         Account No.: 5520110029496
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.43% Series F
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B# 4
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Pan-American Life Insurance Company
                                         Attn:  Bond & Stock Accounting 28th
                                         Floor
                                         601 Poydras Street
                                         New Orleans, LA 70130
                                         Fax:  (504) 566-3459
- --------------------------------------- ---------------------------------------
Address for All other Notices            Pan-American Life Insurance Company
                                         Attn: Investment Department 28h Floor
                                         601 Poydras Street
                                         New Orleans, LA 70130
- ---------------------------------------- ---------------------------------------
Other Instructions                       PAN-AMERICAN LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Pan-American Life Insurance Company
                                         Attn: Marylyn Andree 28th Floor
                                         601 Poydras Street
                                         New Orleans, LA 70130
- ---------------------------------------- ---------------------------------------
Tax Identification Number                72-0281240
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           OXFORD LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         OXFORD LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-16; $2,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             B One Col
                                         BK One Tr Col/CUST
                                         ABA: 044000804
                                         FAO: #0482068650
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  OLIC
                                         Attn:  Investments
                                         2721 North Central Ave.
                                         Phoenix, AZ 85004
- ---------------------------------------- ---------------------------------------
Address for All other Notices            OLIC
                                         Attn:  Investments
                                         2721 North Central Ave.
                                         Phoenix, AZ 85004
- ---------------------------------------- ---------------------------------------
Other Instructions                       OXFORD LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:  Mark Haydukovich
                                         Title:  President
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Bank One #2255
                                         c/o New York Window
                                         3rd Floor Plaza Level
                                         55 Water Street
                                         New York, NY 10041
- ---------------------------------------- ---------------------------------------
Tax Identification Number                860216483
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           REPUBLIC WESTERN INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         REPUBLIC WESTERN INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-17; $1,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Norwest Bank Minnesota NA
                                         ABA 091000019
                                         BNF: Norwest Trust Clearing Mpls
                                         BNFA:  0840245
                                         OBI-FFC to:  Acct #13440000 Republic
                                         Western Ins. Co.
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28 % Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  RWIC
                                         Attn:  Investments
                                         2721 North Central Ave.
                                         Phoenix, AZ 85004
- ---------------------------------------- ---------------------------------------
Address for All other Notices            RWIC
                                         Attn:  Investments
                                         2721 North Central Ave.
                                         Phoenix, AZ 85004
- ---------------------------------------- ---------------------------------------
Other Instructions                       REPUBLIC WESTERN INSURANCE COMPANY
                                         By_______________________
                                         Name:  Kristin Spears
                                         Title:  Assistant Vice President
                                         Investments/Corporate Treasurer
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        Bankers Trust Company
                                         16 Wall Street, 4th Floor
                                         Attention:   Window 42
                                         A/C Norwest Bank Minnesota Trust
                                         Department
                                         Account #092192
                                         New York, NY 10015
                                         Norwest Client Account #133440000
                                         Norwest Client Account Name:  Republic
                                         Western Ins. Co.
- ---------------------------------------- ---------------------------------------
Tax Identification Number                86074508
- ---------------------------------------- ---------------------------------------


<PAGE>



- ---------------------------------------- ---------------------------------------
PURCHASER NAME                           UNITED LIFE INSURANCE COMPANY
- ---------------------------------------- ---------------------------------------
Name in Which Note is Registered         BOOTH & CO.
- ---------------------------------------- ---------------------------------------
Series; Note Registration Number;        RE-18; $2,000,000
Principal Amount
- ---------------------------------------- ---------------------------------------
Payment on Account of Note

         Method                          Federal Funds Wire Transfer

         Account Information             Northern Trust Company
                                         ABA#: 071000152
                                         Account No.: 5186041000
                                         OBI-FFC to 05-02808
                                         Seitel
                                         Attn:  MBS P&I
- ---------------------------------------- ---------------------------------------
Accompanying Information                 Name of Company:   SEITEL, INC.
                                         Description of
                                         Security:          7.28% Series E
                                                            Senior Notes due
                                                            2009
                                         Security Number:   816074 B@ 6
                                         Due  Date  and  Application  (as  among
                                         principal, premium and interest) of the
                                         payment being made:
- ---------------------------------------- ---------------------------------------
Address for Notices Related to Payments  Kevin L. Kubik, Chief Investment
                                         Officer
                                         United Fire & Casualty Company
                                         118 Second Avenue SE
                                         P.O. Box 73909
                                         Cedar Rapids, IA 52407-3909
- ---------------------------------------- ---------------------------------------
Address for All other Notices            Kevin L. Kubik, Chief Investment
                                         Officer
                                         United Fire & Casualty Company
                                         118 Second Avenue SE
                                         P.O. Box 73909
                                         Cedar Rapids, IA 52407-3909
- ---------------------------------------- ---------------------------------------
Other Instructions                       UNITED LIFE INSURANCE COMPANY
                                         By_______________________
                                         Name:
                                         Title:
- ---------------------------------------- ---------------------------------------
Instructions re Delivery of Notes        The Northern Trust Company of New York
                                         40 Broad Street, 8th Floor
                                         New York, NY 10004
                                         Ref:  05-02808/United Life Insurance
                                         Company
- ---------------------------------------- ---------------------------------------
Tax Identification Number                36-6033750
- ---------------------------------------- ---------------------------------------



<PAGE>


                                   SCHEDULE B

                                  DEFINED TERMS

     As used herein, the following terms have the respective  meanings set forth
below or set forth in the Section hereof following such term:

     ACCREDITED  INSTITUTION -- means any Person who is an "accredited investor"
within the  meaning of such term set forth in Rule  501(a)(1),  (2),  (3) or (7)
under the Securities Act.

     AFFILIATE -- means, at any time,

          (a) with  respect to any  Person  other  than the  Company,  any other
     Person  that  at such  time  directly  or  indirectly  through  one or more
     intermediaries  Controls,  or is Controlled  by, or is under common Control
     with, such Person, and

          (b) with respect to the Company,  a Person (other than a  Wholly-Owned
     Restricted Subsidiary),

               (i) that at such time directly or indirectly  through one or more
          intermediaries  Controls,  or is  Controlled  by,  or is under  common
          Control with, the Company,

               (ii) that at such time  beneficially  owns or holds,  directly or
          indirectly,  ten  percent  (10%)  or more of the  Voting  Stock of the
          Company, or

               (iii) ten percent  (10%) or more of the Voting  Stock of which is
          at such time  beneficially  owned or held by the Company or any one or
          more of the Subsidiaries.

As used  in  this  definition,  "CONTROL"  means  the  possession,  directly  or
indirectly,  of the power to direct or cause the direction of the management and
policies of a Person,  whether  through the ownership of voting  Securities,  by
contract or otherwise.

     AGREEMENT -- is defined in Section 17.3.

     BOARD OF  DIRECTORS  -- at any time  means  the board of  directors  of the
Company or any committee  thereof which, in the instance,  shall have the lawful
power to exercise the power and authority of such board of directors.

     BUSINESS  DAY -- means (a) for the  purposes of Section  8.6 only,  any day
other than a Saturday,  a Sunday or a day on which commercial banks in New York,
New York are required or  authorized  to be closed,  and (b) for the purposes of
any other provision of this Agreement,  any day other than a Saturday,  a Sunday
or a day on which commercial  banks in Houston,  Texas or New York, New York are
required or authorized to be closed.


<PAGE>


     CAPITAL LEASE -- means a lease with respect to which the lessee is required
concurrently  to recognize the  acquisition  of an asset and the incurrence of a
liability in accordance with GAAP.

     CAPITAL LEASE OBLIGATION -- means, with respect to any Person and a Capital
Lease,  the amount of the  obligation  of such  Person as the lessee  under such
Capital Lease which would, in accordance  with GAAP,  appear as a liability on a
balance sheet of such Person.

     CLOSING -- is defined in Section 3.1.

     CLOSING DATE -- is defined in Section 3.1.

     CODE -- means the Internal  Revenue  Code of 1986,  as amended from time to
time, and the rules and regulations promulgated thereunder from time to time.

     COMPANY -- is defined in the introductory paragraph of this Agreement.

     CONFIDENTIAL INFORMATION -- is defined in Section 20.

     CONSOLIDATED DEBT -- means, as of any date of  determination,  the total of
all Debt of the  Company and the  Restricted  Subsidiaries  outstanding  on such
date,  after  eliminating all offsetting  debits and credits between the Company
and the Restricted Subsidiaries and all other items required to be eliminated in
the  course of the  preparation  of  consolidated  financial  statements  of the
Company and the Restricted Subsidiaries in accordance with GAAP.

     CONSOLIDATED INTEREST EXPENSE -- means, with respect to any period, the sum
(without duplication) of the following (in each case, eliminating all offsetting
debits and credits between the Company and the Restricted  Subsidiaries  and all
other  items  required  to be  eliminated  in the course of the  preparation  of
consolidated financial statements of the Company and the Restricted Subsidiaries
in accordance with GAAP):

          (a) all interest in respect of Debt of the Company and the  Restricted
     Subsidiaries  (including  imputed  interest on Capital  Lease  Obligations)
     deducted in determining Consolidated Net Income for such period, and

          (b)  all  debt  discount  and  expense  amortized  or  required  to be
     amortized in the determination of Consolidated Net Income for such period.

     CONSOLIDATED  NET INCOME -- means,  with  reference to any period,  the net
income (or loss) of the Company and the Restricted  Subsidiaries for such period
(taken as a cumulative  whole),  as determined in  accordance  with GAAP,  after
eliminating  all  offsetting  debits and  credits  between  the  Company and the
Restricted  Subsidiaries  and all other items  required to be  eliminated in the
course of the  preparation of consolidated  financial  statements of the Company
and the Restricted  Subsidiaries  in accordance  with GAAP,  PROVIDED that there
shall be excluded:


<PAGE>


          (a) any gains  resulting  from any write-up of any assets (but not any
     loss resulting from any write-down of any assets),

          (b) the income (or loss) of any  Person  accrued  prior to the date it
     becomes a Restricted  Subsidiary or is merged into or consolidated with the
     Company or a Restricted Subsidiary, and the income (or loss) of any Person,
     substantially  all of the assets of which have been  acquired in any manner
     by the Company or any Restricted Subsidiary,  realized by such other Person
     prior to the date of acquisition,

          (c) in the case of a  successor  to the  Company by  consolidation  or
     merger or as a  transferee  of its assets,  any  earnings of the  successor
     corporation prior to such consolidation, merger or transfer of assets,

          (d) any  aggregate  net gain (but not any  aggregate  net loss) during
     such  period  arising  from  the  sale,   conversion,   exchange  or  other
     disposition  of capital assets (such term to include,  without  limitation,
     (i) all non-current  assets and, without  duplication,  (ii) the following,
     whether or not current:  all fixed assets,  whether tangible or intangible,
     all inventory sold in conjunction with the disposition of fixed assets, and
     all securities),

          (e) any  portion of such net income  that  cannot be freely  converted
     into United States Dollars,

          (f) the  income  (or  loss) of any  Person  (other  than a  Restricted
     Subsidiary)  in which  the  Company  or any  Restricted  Subsidiary  has an
     ownership  interest,  except to the  extent  that any such  income has been
     actually received by the Company or such Restricted  Subsidiary in the form
     of cash dividends or similar cash distributions,

          (g) any gain  arising from the  acquisition  of any  security,  or the
     extinguishment,  under GAAP, of any Debt, of the Company or any  Restricted
     Subsidiary,

          (h) any net income or gain or any net loss during such period from (i)
     any change in accounting  principles  in  accordance  with GAAP or (ii) any
     prior period adjustments resulting from any change in accounting principles
     in accordance with GAAP, and

          (i) any net income or gain (but not any net loss)  during  such period
     from (i) any extraordinary items or (ii) any discontinued operations or the
     disposition thereof.

     CONSOLIDATED  NET WORTH --  means,  at any  time,  the total  stockholders'
equity which would be shown in consolidated  financial statements of the Company
and the Restricted Subsidiaries prepared at such time in accordance with GAAP.

     CONSOLIDATED  TANGIBLE  ASSETS -- means,  at any time,  Consolidated  Total
Assets at such time, MINUS

          (a) deferred assets, other than prepaid expenses which are refundable;


<PAGE>


          (b) patents, copyrights, trademarks, trade names, service marks, brand
     names,  franchises,  goodwill,  experimental  expenses  and  other  similar
     intangibles;

          (c) unamortized debt discount and expense; and

          (d) all other property  which would be classified as intangible  under
     GAAP.

     CONSOLIDATED  TOTAL ASSETS -- means,  at any time,  the amount at which the
total assets of the Company and the  Restricted  Subsidiaries  would be shown in
consolidated financial statements of the Company and the Restricted Subsidiaries
prepared at such time in accordance with GAAP,  after deduction of depreciation,
amortization and all other properly deductible valuation reserves.

     CONTINGENT OPTIONAL PREPAYMENT -- is defined in Section 8.2.

     DEBT -- means, with respect to any Person, without duplication,

          (a) its obligations for borrowed money;

          (b)  its  obligations  in  respect  of  banker's  acceptances,   other
     acceptances,  letters  of credit  and other  instruments  serving a similar
     function issued or accepted by banks and other financial  institutions  for
     the account of such Person  (whether or not incurred in connection with the
     borrowing of money);

          (c) its obligations that are evidenced by bonds, notes,  debentures or
     similar instruments;

          (d) its  obligations  for the  deferred  purchase  price  of  property
     acquired by such Person (excluding accounts payable arising in the ordinary
     course of business  but  including,  without  limitation,  all  obligations
     created or arising  under any  conditional  sale or other  title  retention
     agreement with respect to any such property);

          (e) its Capital Lease Obligations;

          (f) its obligations in respect of all mandatorily redeemable preferred
     stock of such Person;

          (g) its  obligations  for  borrowed  money  secured  by any Lien  with
     respect to any property owned by such Person (whether or not it has assumed
     or otherwise become liable for such obligations); and

          (h) any Guaranty of such Person with respect to  liabilities of a type
     described in any of clauses (a) through (g) hereof.


<PAGE>


Debt of any Person shall include all obligations of such Person of the character
described in clauses (a) through (h) to the extent such Person  remains  legally
liable in respect thereof  notwithstanding that any such obligation is deemed to
be extinguished under GAAP.

     DEFAULT -- means an event or condition the occurrence or existence of which
would,  with the lapse of time or the giving of notice or both,  become an Event
of Default.

     DEFAULT RATE -- means the rate of interest  for overdue  payments as stated
in the first paragraph of the relevant Series of Notes.

     DESIGNATED PORTION -- is defined in Section 10.6(b)(i).

     DISPOSITION VALUE -- is defined in Section 10.6(c)(i).

     EBITDA -- means, in respect of any period, Consolidated Net Income for such
period MINUS

          (a) to the extent added in the  computation of such  Consolidated  Net
     Income, each of the following:

               (i) extraordinary gains, net of extraordinary losses, and

               (ii)  gains,  net of  losses,  arising  from the  disposition  of
          property other than in the ordinary course of business, PLUS

          (b) to the extent deducted in the computation of such Consolidated Net
     Income, each of the following:

               (i)  Consolidated  Interest  Expense,  net of interest  and other
          investment income,

               (ii) taxes imposed on or measured by income or excess  profits of
          the Company and the Restricted Subsidiaries,

               (iii) the amount of all depreciation,  depletion and amortization
          allowances  and  other  non-cash  expenses  of  the  Company  and  the
          Restricted Subsidiaries,

               (iv) extraordinary losses, net of extraordinary gains, and

               (v)  losses,  net of  gains,  arising  from  the  disposition  of
          property other than in the ordinary course of business.


<PAGE>


     ENVIRONMENTAL LAWS -- means any and all Federal,  state, local, and foreign
statutes,  laws, regulations,  ordinances,  rules,  judgments,  orders, decrees,
permits, concessions,  grants, franchises,  licenses, agreements or governmental
restrictions  relating to pollution and the protection of the environment or the
release of any  materials  into the  environment,  including  but not limited to
those related to Hazardous  Materials or wastes, air emissions and discharges to
waste or public systems.

     EQUITY INTEREST -- means

          (a) the  outstanding  Voting Stock of a corporation  or other business
     entity,

          (b) the interest in the capital or profits of a  corporation,  limited
     liability company, partnership or joint venture, or

          (c) the beneficial interest in a trust or estate.

     ERISA -- means the Employee  Retirement  Income  Security  Act of 1974,  as
amended from time to time, and the rules and regulations  promulgated thereunder
from time to time in effect.

     ERISA   AFFILIATE   --  means  any  trade  or  business   (whether  or  not
incorporated)  that is treated as a single  employer  together  with the Company
under section 414 of the Code.

     EVENT OF DEFAULT -- is defined in Section 11.

     EXCHANGE ACT -- means the Securities Exchange Act of 1934, as amended.

     EXCLUDED TRANSFER -- is defined in Section 10.6.

     FAIR MARKET VALUE -- means,  at any time and with respect to any  property,
the sale value of such property that would be realized in an  arm's-length  sale
at such time between an informed  and willing  buyer and an informed and willing
seller (neither being under a compulsion to buy or sell, respectively).

     GAAP -- means  accounting  principles as  promulgated  from time to time in
statements,  opinions and  pronouncements by the American Institute of Certified
Public  Accountants  and the Financial  Accounting  Standards  Board and in such
statements,  opinions and  pronouncements of such other entities with respect to
financial   accounting  of  for-profit  entities  as  shall  be  accepted  by  a
substantial segment of the accounting profession in the United States.

     GOVERNMENTAL AUTHORITY -- means

          (a) the government of

               (i) the United States of America or any State or other  political
          subdivision thereof, or

               (ii) any  jurisdiction  in which the  Company  or any  Subsidiary
          conducts  all  or  any  part  of  its   business,   or  which  asserts
          jurisdiction over any properties of the Company or any Subsidiary, or

          (b) any entity exercising executive, legislative, judicial, regulatory
     or administrative functions of, or pertaining to, any such government.

     GUARANTY -- means, with respect to any Person,  any obligation  (except the
endorsement  in the ordinary  course of business of negotiable  instruments  for
deposit or collection) of such Person guaranteeing or in effect guaranteeing any
indebtedness,  dividend or other  obligation  of any other Person in any manner,
whether  directly or  indirectly,  including  (without  limitation)  obligations
incurred through an agreement, contingent or otherwise, by such Person:

          (a) to  purchase  such  indebtedness  or  obligation  or any  property
     constituting security therefor;

          (b) to advance or supply funds (i) for the purchase or payment of such
     indebtedness  or  obligation,  or (ii) to maintain  any working  capital or
     other  balance  sheet  condition or any income  statement  condition of any
     other  Person or  otherwise  to  advance  or make  available  funds for the
     purchase or payment of such indebtedness or obligation;

          (c)  to  lease  properties  or  to  purchase  properties  or  services
     primarily  for the purpose of assuring  the owner of such  indebtedness  or
     obligation  of the  ability  of any  other  Person to make  payment  of the
     indebtedness or obligation; or

          (d) otherwise to assure the owner of such  indebtedness  or obligation
     against loss in respect thereof.

In any computation of the indebtedness or other liabilities of the obligor under
any Guaranty, the indebtedness or other obligations that are the subject of such
Guaranty shall be assumed to be direct obligations of such obligor.

     HAZARDOUS  MATERIAL  -- means any and all  pollutants,  toxic or  hazardous
wastes or any other substances that might pose a hazard to health or safety, the
removal  of which may be  required  or the  generation,  manufacture,  refining,
production, processing, treatment, storage, handling, transportation,  transfer,
use, disposal, release, discharge,  spillage, seepage, or filtration of which is
or  shall  be  restricted,   prohibited  or  penalized  by  any  applicable  law
(including, without limitation,  asbestos, urea formaldehyde foam insulation and
polychlorinated biphenyls).

     HOLDER -- means,  at any time and with  respect to any Note,  the Person in
whose name such Note is  registered  at such time in the register  maintained by
the Company pursuant to Section 13.1.

     INSTITUTIONAL  INVESTOR -- means (a) any original purchaser of a Note or an
Affiliate  thereof,  (b) any holder of more than five  percent (5%) in aggregate
principal  amount  of  the  Notes  then  outstanding,  and  (c)  any  Accredited
Institution.


<PAGE>


     INVESTMENT  --  means  any  investment,  made  in cash  or by  delivery  of
property,  by the Company or any of the  Subsidiaries in any Person,  whether by
acquisition of stock,  indebtedness or other obligation or Security  (including,
without  limitation,  any interests in any partnership or joint venture),  or by
loan,  Guaranty,  advance,  capital  contribution  or  otherwise;  PROVIDED that
"Investment"  does not  include  trade  credit  to the  extent  extended  in the
ordinary course of business.

     LIEN -- means,  with respect to any Person,  any  mortgage,  lien,  pledge,
charge, security interest or other encumbrance,  or any interest or title of any
vendor,  lessor,  lender or other  secured  party to or of such Person under any
conditional  sale or other title retention  agreement or Capital Lease,  upon or
with respect to any property or asset of such Person  (including  in the case of
stock,   stockholder  agreements,   voting  trust  agreements  and  all  similar
arrangements).

     MAKE-WHOLE AMOUNT -- is defined in Section 8.6.

     MATERIAL  --  means  material  in  relation  to the  business,  operations,
affairs,  financial  condition,  assets or  properties  of the  Company  and the
Restricted Subsidiaries taken as a whole.

     MATERIAL  ADVERSE  EFFECT  -- means a  material  adverse  effect on (a) the
business, operations,  affairs, financial condition, assets or properties of the
Company and the Restricted  Subsidiaries,  taken as a whole,  (b) the ability of
the Company to perform its obligations  under this Agreement and the Notes,  (c)
the ability of any Restricted  Subsidiary to perform its respective  obligations
under the Subsidiary  Guaranty,  or (d) the validity or  enforceability  of this
Agreement, the Subsidiary Guaranty or the Notes.

     MAXIMUM RATE -- is defined in Section 22.10.

     MEMORANDUM -- is defined in Section 5.3.

     MULTIEMPLOYER  PLAN -- means  any Plan that is a  "multiemployer  plan" (as
such term is defined in section 4001(a)(3) of ERISA).

     NAIC ANNUAL STATEMENT -- is defined in Section 6.3.

     NET ASSET SALE  PROCEEDS  AMOUNT -- means,  with respect to any Transfer of
any property by any Person, an
amount equal to the difference of

          (a) the  aggregate  amount of the  consideration  (valued  at the Fair
     Market Value of such  consideration at the time of the consummation of such
     Transfer) received by such Person in respect of such Transfer, MINUS

          (b) all  ordinary  and  reasonable  out-of-pocket  costs and  expenses
     actually incurred by such Person in connection with such Transfer.

     NET  PROCEEDS OF COMMON STOCK -- means,  with  respect to any period,  cash
proceeds  (net of all costs and  out-of-pocket  expenses  incurred in connection
therewith, including, without limitation,  placement, underwriting and brokerage
fees and  expenses)  received  by the Company  and the  Restricted  Subsidiaries
during such period from the sale of all common stock of the  Company,  including
in such net proceeds:

          (a) the net amount paid upon issuance and exercise  during such period
     of any right to acquire  any common  stock,  or paid  during such period to
     convert a  convertible  debt  Security to common stock (but  excluding  any
     amount  paid  to  the  Company  upon  issuance  of  such  convertible  debt
     Security); and

          (b) any amount paid to the Company  upon  issuance of any  convertible
     debt Security that is converted to common stock during such period.

     NOTES -- is defined in Section 1.

     OFFICER'S  CERTIFICATE -- means a certificate of a Senior Financial Officer
or of any other  officer of the  Company  whose  responsibilities  extend to the
subject matter of such certificate.

     OPTIONAL PREPAYMENT DATE -- is defined in Section 8.2.

     OPTIONAL PREPAYMENT NOTICE -- is defined in Section 8.2.

     ORDINARY COURSE TRANSFER -- is defined in Section 10.6.

     OTHER AGREEMENTS -- is defined in Section 2.

     OTHER PURCHASERS -- is defined in Section 2.

     PBGC - means the  Pension  Benefit  Guaranty  Corporation  referred  to and
defined in ERISA or any successor thereto.

     PERSON -- means an individual, partnership,  corporation, limited liability
company,   partnership,   association,   joint  venture,  trust,  unincorporated
organization, or a government or agency or political subdivision thereof.

     PLAN -- means an  "employee  benefit  plan" (as defined in section  3(3) of
ERISA) that is or,  within the preceding  five years,  has been  established  or
maintained,  or to which  contributions are or, within the preceding five years,
have been made or required to be made, by the Company or any ERISA  Affiliate or
with respect to which the Company or any ERISA Affiliate may have any liability.

     PREPAYMENT TRANSFER -- is defined in Section 10.6.

     PRIORITY DEBT -- means, without duplication, the sum of (a) all Debt of the
Company  secured by a Lien permitted only by Section 10.4(j) and (b) all Debt of
Restricted  Subsidiaries  (except (i) Debt held by the Company or a Wholly-Owned
Restricted Subsidiary, (ii) Debt of a Restricted Subsidiary that is an unsecured
guaranty  of Senior Debt and that ranks pari passu with the  obligations  of the
Restricted  Subsidiaries  under the  Subsidiary  Guaranty,  and (iii)  Debt of a
Restricted  Subsidiary  secured by a Lien permitted by the provisions of Section
10.4(a) through (i), inclusive).

     PROPERTY or PROPERTIES -- means,  unless  otherwise  specifically  limited,
real or  personal  property  of any  kind,  tangible  or  intangible,  choate or
inchoate.

     PURCHASER -- is defined in Section 3.1.

     QUALIFIED  INSTITUTIONAL  BUYER -- means you, each of the Other Purchasers,
and any Person who is a "qualified  institutional  buyer," within the meaning of
such term as set forth in Rule 144A(a)(1) under the Securities Act.

     REINVESTED TRANSFER -- is defined in Section 10.6.

     REQUIRED  HOLDERS -- means, at any time, the holders of at least a majority
in principal  amount of the Notes at the time  outstanding  (exclusive  of Notes
then owned by the Company or any of its Affiliates).

     RESCISSION NOTICE -- is defined in Section 8.2.

     RESPONSIBLE  OFFICER -- means any Senior  Financial  Officer  and any other
officer  of the  Company  with  responsibility  for  the  administration  of the
relevant portion of this agreement.

     RESTRICTED INVESTMENTS -- means all Investments except the following:

          (a) cash;

          (b) Investments in one or more  Restricted  Subsidiaries or any Person
     engaged in the business referred to in Section 10.10 that concurrently with
     such Investment becomes a Wholly-Owned Restricted Subsidiary;

          (c)  Investments in United States  Governmental  Securities,  PROVIDED
     that such  obligations  mature within 365 days from the date of acquisition
     thereof;

          (d)  Investments in  certificates  of deposit or banker's  acceptances
     issued by an Acceptable Bank,  PROVIDED that such obligations mature within
     365 days from the date of acquisition thereof;

          (e)  Investments  in  commercial  paper given the highest  rating by a
     credit rating agency of recognized  national standing and maturing not more
     than 270 days from the date of creation thereof; and

          (f)  Investments  in money market  mutual funds that invest  solely in
     so-called "money market" instruments  maturing not more than one year after
     the acquisition thereof,  which funds have assets in excess of Five Hundred
     Million Dollars ($500,000,000).

For purposes of this Agreement,  an Investment  shall be valued at the lesser of
(i) cost and (ii) the value at which such Investment is to be shown on the books
of the Company and the Restricted Subsidiaries in accordance with GAAP.

As used in this definition of "Restricted Investments":

          ACCEPTABLE  BANK --  means  any  bank or trust  company  (i)  which is
     organized  under  the laws of the  United  States of  America  or any State
     thereof  and  (ii)  which  has  capital,   surplus  and  undivided  profits
     aggregating at least Five Hundred Million Dollars ($500,000,000).

     RESTRICTED PAYMENT -- means, whether effected directly or indirectly,

          (a) any  Distribution  in  respect of the  Company  or any  Restricted
     Subsidiary  (other  than on  account  of  capital  stock  or  other  equity
     interests of a Restricted  Subsidiary owned legally and beneficially by the
     Company or another Restricted Subsidiary),  including,  without limitation,
     any Distribution  resulting in the acquisition by the Company of Securities
     which would constitute treasury stock; and

          (b) any payment,  repayment,  redemption,  retirement,  repurchase  or
     other  acquisition,  direct or indirect,  by the Company or any  Restricted
     Subsidiary  of, on account  of, or in  respect  of,  the  principal  of any
     Subordinated  Debt (or any  installment  thereof)  prior  to the  regularly
     scheduled maturity date thereof (as in effect on the date such Subordinated
     Debt was originally incurred).

For purposes of this  Agreement,  the amount of any  Restricted  Payment made in
property  shall be the greater of (x) the Fair Market Value of such property (as
determined  in good faith by the board of  directors  (or  equivalent  governing
body) of the Person making such  Restricted  Payment) and (y) the net book value
thereof on the books of such Person,  in each case  determined as of the date on
which such Restricted Payment is made.

          DISTRIBUTION -- means, in respect of any  corporation,  association or
     other business entity:

          (a) dividends or other  distributions  or payments on capital stock or
     other equity  interest of such  corporation,  association or other business
     entity (except distributions in such stock or other equity interest); and

          (b) the  redemption  or  acquisition  of such  stock or  other  equity
     interests or of warrants, rights or other options to purchase such stock or
     other  equity  interests  (except when solely in exchange for such stock or
     other equity interests).

     RESTRICTED SUBSIDIARY -- means and includes each and every Subsidiary other
than any Subsidiary which, at the time of any determination  hereunder, has been
designated by the Board of Directors and by written notice of the Company to all
of the holders to be an Unrestricted  Subsidiary;  PROVIDED,  in any event, that
each of the following shall at all times constitute a Restricted Subsidiary:

          (a) each Subsidiary  identified as a Restricted Subsidiary on Schedule
     5.4; and

          (b) each  Subsidiary  which owns,  directly or  indirectly,  more than
     fifty percent (50%) of the Equity Interest of a Restricted Subsidiary.

     SECURITIES ACT -- means the Securities Act of 1933, as amended from time to
time.

     SECURITY -- means  "security" as defined by section 2(1) of the  Securities
Act.

     SENIOR  DEBT -- means  any Debt of the  Company  that is not in any  manner
subordinated  in  right  of  payment  or  security  in any  respect  to the Debt
evidenced by the Notes or to any other Debt of the Company.

     SENIOR FINANCIAL  OFFICER -- means the chief financial  officer,  principal
accounting officer, treasurer or comptroller of the Company.

     SERIES -- means any one or more of the series of Notes issued hereunder.

     SERIES D NOTES -- is defined in Section 1.

     SERIES E NOTES -- is defined in Section 1.

     SERIES F NOTES -- is defined in Section 1.

     SUBORDINATED DEBT -- mean any Debt of the Company other than Senior Debt.

     SUBSIDIARY -- means, as to any Person,  any corporation,  limited liability
company, partnership, joint venture, trust or estate in which such Person or one
or more of the  Subsidiaries or such Person and one or more of the  Subsidiaries
own more than fifty  percent  (50%) of the Equity  Interest.  Unless the context
otherwise clearly requires,  any reference to a "Subsidiary" is a reference to a
Subsidiary of the Company.

     SUBSIDIARY GUARANTY -- is defined in Section 4.10.

     SUBSTANTIAL PORTION -- is defined in Section 10.6(c)(ii).

     SUCCESSOR CORPORATION -- is defined in Section 10.5.

     TOTAL  CAPITALIZATION  -- means, at any time, the sum of Consolidated  Debt
PLUS Consolidated Net Worth, in each case at such time.

     TRANSFER -- is defined in Section 10.6(c)(iii).

     TRUST -- is defined in Section 22.8.

     UNITED STATES  GOVERNMENTAL  SECURITY -- means any direct obligation of, or
obligation guaranteed by, the United States of America, or any agency controlled
or supervised by or acting as an instrumentality of the United States of America
pursuant to authority  granted by the Congress of the United  States of America,
so long as such obligation or guarantee shall have the benefit of the full faith
and  credit of the  United  States of  America  which  shall  have been  pledged
pursuant to authority granted by the Congress of the United States of America.

     UNRESTRICTED  SUBSIDIARY -- means each  Subsidiary  other than a Restricted
Subsidiary.

     VOTING STOCK -- means the capital stock or similar interest of any class or
classes  (however  designated) of a corporation or other  business  entity,  the
holders of which are ordinarily,  in the absence of  contingencies,  entitled to
vote for the  election  of the  members of the board of  directors  (or  Persons
performing similar functions) of a corporation or other business entity.

     WHOLLY-OWNED  RESTRICTED  SUBSIDIARY -- means,  at any time, any Restricted
Subsidiary  one hundred  percent (100%) of all of the Equity  Interests  (except
directors' qualifying shares) and voting interests of which are owned by any one
or  more  of  the  Company  and  the  Company's  other  Wholly-Owned  Restricted
Subsidiaries at such time.

     YEAR 2000 COMPLIANT AND READY -- means:

          (a)  satisfactorily  handling date  information  involving any and all
     dates  before,  during and/or after  January 1, 2000,  including  accepting
     input,  providing  output and performing  date  calculations in whole or in
     part, and operating accurately,  without Material  interruption,  on and in
     respect of any and all dates  before,  during  and/or after January 1, 2000
     and without any Material change in performance; and

          (b) the Company has  developed  alternative  plans to ensure  business
     continuity  in all Material  respects in the event of the failure to comply
     with the items identified in the foregoing clause (a).


<PAGE>


                                                                      EXHIBIT 1D

                          FORM OF SERIES D SENIOR NOTE

THIS  SECURITY HAS NOT BEEN  REGISTERED  UNDER THE  SECURITIES  ACT OF 1933,  AS
AMENDED,  AND MAY ONLY BE REOFFERED AND SOLD IN COMPLIANCE WITH THE REGISTRATION
PROVISIONS OF SUCH ACT OR PURSUANT TO AN EXEMPTION THEREFROM.

                                  SEITEL, INC.

                7.03% Series D Senior Note Due February 15, 2004

No. __                                                        February ___, 1999
$________                                                      PPN:  816074 B* 8

     SEITEL, INC. (the "COMPANY"),  a Delaware corporation,  for value received,
hereby  promises to pay to ______ or  registered  assigns the  principal  sum of
______ DOLLARS  ($______) on February 15, 2004 and to pay interest  (computed on
the basis of a 360-day  year of twelve  30-day  months) on the unpaid  principal
balance  thereof  from the date of this  Note at the  rate of  seven  and  three
hundredths  percent  (7.03%) PER ANNUM,  semiannually  on the  fifteenth  day of
February and August in each year,  commencing on the later of August 15, 1999 or
the payment date next  succeeding  the date hereof,  until the principal  amount
hereof  shall  become  due and  payable;  and to pay on demand  interest  on any
overdue principal (including any overdue prepayment of principal) and Make-Whole
Amount,  if any, and (to the extent  permitted by applicable law) on any overdue
installment  of interest,  at a rate equal to the lesser of (a) the highest rate
allowed by  applicable  law or (b) the greater of (i) nine and three  hundredths
percent  (9.03%) PER ANNUM and (ii) two  percent  (2%) over the rate of interest
publicly announced by Morgan Guaranty Trust Company of New York in New York, New
York as its "base" or "prime" rate.

     Payments of principal,  Make-Whole  Amount,  if any, and interest  shall be
made in such coin or currency of the United  States of America as at the time of
payment is legal  tender for the  payment  of public  and  private  debts to the
registered holder hereof at the address shown in the register  maintained by the
Company for such purpose,  in the manner provided in the Note Purchase Agreement
(defined below).

     This Note is one of an issue of Series D Notes of the Company  issued in an
aggregate  principal  amount  limited to Twenty  Million  Dollars  ($20,000,000)
pursuant to the  separate  Note  Purchase  Agreements  (collectively,  the "NOTE
PURCHASE  AGREEMENT"),  each dated as of February 12, 1999,  between the Company
and each of the purchasers listed on Schedule A thereto,  and is entitled to the
benefits thereof. Capitalized terms used herein and not otherwise defined herein
have the meanings specified in the Note Purchase  Agreement.  As provided in the
Note Purchase Agreement, this Note may be prepaid, in whole or in part, together
with a Make-Whole Amount.


<PAGE>


         The Notes  and all  other  obligations  of the  Company  under the Note
     Purchase Agreement have been unconditionally guarantied by the Restricted
Subsidiaries  pursuant to the Guaranty,  dated as of February 12, 1999,  entered
into by such Restricted Subsidiaries.

     This  Note  is a  registered  Note  and  is  transferable,  subject  to the
restrictions  set forth in the Note Purchase  Agreement and in the legend above,
only by surrender  thereof as  specified  in Section  13.2 of the Note  Purchase
Agreement.  Prior to due presentment for registration of transfer, the Person in
whose name any Note shall be registered shall be deemed and treated as the owner
and holder  thereof,  and the  Company  shall not be  affected  by any notice or
knowledge to the contrary.

     Under certain  circumstances,  as specified in the Note Purchase Agreement,
the principal of this Note (together with any applicable  Make-Whole Amount) may
be declared  due and  payable in the manner and with the effect  provided in the
Note Purchase Agreement.

     It is the  intention  of the parties  hereto to comply with all  applicable
usury laws; accordingly,  it is agreed that notwithstanding any provision to the
contrary  herein or in the Note Purchase  Agreement,  or in any of the documents
securing payment hereof or otherwise  relating  hereto,  no such provision shall
require  the  payment  or permit the  collection  of  interest  in excess of the
highest rate allowed by applicable  law (the "MAXIMUM  Rate").  If any excess of
interest in such  respect is  provided  for,  or shall be  adjudicated  to be so
provided  for,  herein  or in  the  Note  Purchase  Agreement  or in  any of the
documents  securing payment hereof or otherwise  relating  hereto,  then in such
event (a) the provisions of this paragraph shall govern and control, (b) neither
the  Company,  endorsers or  Restricted  Subsidiaries,  nor their  heirs,  legal
representatives,  successors  or  assigns  nor any other  party  liable  for the
payment  hereof,  shall be obligated  to pay the amount of such  interest to the
extent that it is in excess of the Maximum  Rate,  (c) any such excess which may
have been collected shall, at the election of the holder of this Note, be either
applied as a credit against the then unpaid  principal amount hereof or refunded
to the Company, and (d) the provisions hereof and of the Note Purchase Agreement
and any documents  securing  payment hereof shall be  automatically  reformed so
that the effective  rate of interest  shall be reduced to the Maximum Rate.  For
the purpose of determining the Maximum Rate, all interest  payments with respect
hereto shall be amortized,  prorated and spread  throughout the full term hereof
so that the effective rate of interest  hereunder is uniform throughout the term
hereof.


<PAGE>


     THIS NOTE AND THE NOTE  PURCHASE  AGREEMENT  ARE  GOVERNED BY, AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH, INTERNAL NEW YORK LAW.

                                            SEITEL, INC.

                                            By:
                                               ---------------------------------
                                                   Name:
                                                   Title:


<PAGE>


                                                                      EXHIBIT 1E

                          FORM OF SERIES E SENIOR NOTE

THIS  SECURITY HAS NOT BEEN  REGISTERED  UNDER THE  SECURITIES  ACT OF 1933,  AS
AMENDED,  AND MAY ONLY BE REOFFERED AND SOLD IN COMPLIANCE WITH THE REGISTRATION
PROVISIONS OF SUCH ACT OR PURSUANT TO AN EXEMPTION THEREFROM.

                                  SEITEL, INC.

                7.28% Series E Senior Note Due February 15, 2009

No. __                                                         February ___ 1999
$________                                                       PPN: 816074 B@ 6

     SEITEL, INC. (the "COMPANY"),  a Delaware corporation,  for value received,
hereby  promises to pay to ______ or  registered  assigns the  principal  sum of
______ DOLLARS  ($______) on February 15, 2009 and to pay interest  (computed on
the basis of a 360-day  year of twelve  30-day  months) on the unpaid  principal
balance thereof from the date of this Note at the rate of seven and twenty-eight
hundredths  percent  (7.28%) PER ANNUM,  semiannually  on the  fifteenth  day of
February and August in each year,  commencing on the later of August 15, 1999 or
the payment date next  succeeding  the date hereof,  until the principal  amount
hereof  shall  become  due and  payable;  and to pay on demand  interest  on any
overdue principal (including any overdue prepayment of principal) and Make-Whole
Amount,  if any, and (to the extent  permitted by applicable law) on any overdue
installment  of interest,  at a rate equal to the lesser of (a) the highest rate
allowed  by  applicable  law or (b) the  greater  of (i) nine  and  twenty-eight
hundredths  percent (9.28%) PER ANNUM and (ii) two percent (2%) over the rate of
interest publicly  announced by Morgan Guaranty Trust Company of New York in New
York, New York as its "base" or "prime" rate.

     Payments of principal,  Make-Whole  Amount,  if any, and interest  shall be
made in such coin or currency of the United  States of America as at the time of
payment is legal  tender for the  payment  of public  and  private  debts to the
registered holder hereof at the address shown in the register  maintained by the
Company for such purpose,  in the manner provided in the Note Purchase Agreement
(defined below).


<PAGE>


     This Note is one of an issue of Series E Notes of the Company  issued in an
aggregate principal amount limited to Seventy-Five Million Dollars ($75,000,000)
pursuant to separate Note Purchase Agreements (collectively,  the "NOTE PURCHASE
AGREEMENT"), each dated as of February 12, 1999, between the Company and each of
the  purchasers  listed on Schedule A thereto,  and is entitled to the  benefits
thereof. Capitalized terms used herein and not otherwise defined herein have the
meanings  specified  in the Note  Purchase  Agreement.  As  provided in the Note
Purchase Agreement,  this Note is subject to prepayment, in whole or in part, in
certain cases  without a Make-Whole  Amount and in other cases with a Make-Whole
Amount. The Company agrees to make required prepayments on account of such Notes
in accordance with the provisions of the Note Purchase Agreement.

     The Notes and all other  obligations of the Company under the Note Purchase
Agreement have been  unconditionally  guarantied by the Restricted  Subsidiaries
pursuant to the  Guaranty,  dated as of February 12, 1999,  entered into by such
Restricted Subsidiaries.

     This  Note  is a  registered  Note  and  is  transferable,  subject  to the
restrictions  set forth in the Note Purchase  Agreement and in the legend above,
only by surrender  thereof as  specified  in Section  13.2 of the Note  Purchase
Agreement.  Prior to due presentment for registration of transfer, the Person in
whose name any Note shall be registered shall be deemed and treated as the owner
and holder  thereof,  and the  Company  shall not be  affected  by any notice or
knowledge to the contrary.

     Under certain  circumstances,  as specified in the Note Purchase Agreement,
the principal of this Note (together with any applicable  Make-Whole Amount) may
be declared  due and  payable in the manner and with the effect  provided in the
Note Purchase Agreement.

     It is the  intention  of the parties  hereto to comply with all  applicable
usury laws; accordingly,  it is agreed that notwithstanding any provision to the
contrary  herein or in the Note Purchase  Agreement,  or in any of the documents
securing payment hereof or otherwise  relating  hereto,  no such provision shall
require  the  payment  or permit the  collection  of  interest  in excess of the
highest rate allowed by applicable  law (the "MAXIMUM  Rate").  If any excess of
interest in such  respect is  provided  for,  or shall be  adjudicated  to be so
provided  for,  herein  or in  the  Note  Purchase  Agreement  or in  any of the
documents  securing payment hereof or otherwise  relating  hereto,  then in such
event (a) the provisions of this paragraph shall govern and control, (b) neither
the  Company,  endorsers or  Restricted  Subsidiaries,  nor their  heirs,  legal
representatives,  successors  or  assigns  nor any other  party  liable  for the
payment  hereof,  shall be obligated  to pay the amount of such  interest to the
extent that it is in excess of the Maximum  Rate,  (c) any such excess which may
have been collected shall, at the election of the holder of this Note, be either
applied as a credit against the then unpaid  principal amount hereof or refunded
to the Company, and (d) the provisions hereof and of the Note Purchase Agreement
and any documents  securing  payment hereof shall be  automatically  reformed so
that the effective  rate of interest  shall be reduced to the Maximum Rate.  For
the purpose of determining the Maximum Rate, all interest  payments with respect
hereto shall be amortized,  prorated and spread  throughout the full term hereof
so that the effective rate of interest  hereunder is uniform throughout the term
hereof.


<PAGE>


     THIS NOTE AND THE NOTE  PURCHASE  AGREEMENT  ARE  GOVERNED BY, AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH, INTERNAL NEW YORK LAW.

                                            SEITEL, INC.

                                            By:
                                               ---------------------------------
                                                   Name:
                                                   Title:


<PAGE>


                                                                      EXHIBIT 1F

                          FORM OF SERIES F SENIOR NOTE

THIS  SECURITY HAS NOT BEEN  REGISTERED  UNDER THE  SECURITIES  ACT OF 1933,  AS
AMENDED,  AND MAY ONLY BE REOFFERED AND SOLD IN COMPLIANCE WITH THE REGISTRATION
PROVISIONS OF SUCH ACT OR PURSUANT TO AN EXEMPTION THEREFROM.

                                  SEITEL, INC.

                7.43% Series F Senior Note Due February 15, 2009

No. __                                                        February ___, 1999
$________                                                       PPN: 816074 B# 4

     SEITEL, INC. (the "COMPANY"),  a Delaware corporation,  for value received,
hereby  promises to pay to ______ or  registered  assigns the  principal  sum of
______ DOLLARS  ($______) on February 15, 2009 and to pay interest  (computed on
the basis of a 360-day  year of twelve  30-day  months) on the unpaid  principal
balance  thereof from the date of this Note at the rate of seven and forty-three
hundredths  percent  (7.43%) PER ANNUM,  semiannually  on the  fifteenth  day of
February and August in each year,  commencing on the later of August 15, 1999 or
the payment date next  succeeding  the date hereof,  until the principal  amount
hereof  shall  become  due and  payable;  and to pay on demand  interest  on any
overdue principal (including any overdue prepayment of principal) and Make-Whole
Amount,  if any, and (to the extent  permitted by applicable law) on any overdue
installment  of interest,  at a rate equal to the lesser of (a) the highest rate
allowed  by  applicable  law or (b) the  greater  of (i)  nine  and  forty-three
hundredths  percent (9.43%) PER ANNUM and (ii) two percent (2%) over the rate of
interest publicly  announced by Morgan Guaranty Trust Company of New York in New
York, New York as its "base" or "prime" rate.

     Payments of principal,  Make-Whole  Amount,  if any, and interest  shall be
made in such coin or currency of the United  States of America as at the time of
payment is legal  tender for the  payment  of public  and  private  debts to the
registered holder hereof at the address shown in the register  maintained by the
Company for such purpose,  in the manner provided in the Note Purchase Agreement
(defined below).

     This Note is one of an issue of Series F Notes of the Company  issued in an
aggregate principal amount limited to Forty-Three Million Dollars  ($43,000,000)
pursuant to the  separate  Note  Purchase  Agreements  (collectively,  the "NOTE
PURCHASE  AGREEMENT"),  each dated as of February 12, 1999,  between the Company
and each of the purchasers listed on Schedule A thereto,  and is entitled to the
benefits thereof. Capitalized terms used herein and not otherwise defined herein
have the meanings specified in the Note Purchase  Agreement.  As provided in the
Note Purchase Agreement, this Note may be prepaid, in whole or in part, together
with a Make-Whole Amount.

     The Notes and all other  obligations of the Company under the Note Purchase
Agreement have been  unconditionally  guarantied by the Restricted  Subsidiaries
pursuant to the  Guaranty,  dated as of February 12, 1999,  entered into by such
Restricted Subsidiaries.

     This  Note  is a  registered  Note  and  is  transferable,  subject  to the
restrictions  set forth in the Note Purchase  Agreement and in the legend above,
only by surrender  thereof as  specified  in Section  13.2 of the Note  Purchase
Agreement.  Prior to due presentment for registration of transfer, the Person in
whose name any Note shall be registered shall be deemed and treated as the owner
and holder  thereof,  and the  Company  shall not be  affected  by any notice or
knowledge to the contrary.

     Under certain  circumstances,  as specified in the Note Purchase Agreement,
the principal of this Note (together with any applicable  Make-Whole Amount) may
be declared  due and  payable in the manner and with the effect  provided in the
Note Purchase Agreement.
<PAGE>

     It is the  intention  of the parties  hereto to comply with all  applicable
usury laws; accordingly,  it is agreed that notwithstanding any provision to the
contrary  herein or in the Note Purchase  Agreement,  or in any of the documents
securing payment hereof or otherwise  relating  hereto,  no such provision shall
require  the  payment  or permit the  collection  of  interest  in excess of the
highest rate allowed by applicable  law (the "MAXIMUM  Rate").  If any excess of
interest in such  respect is  provided  for,  or shall be  adjudicated  to be so
provided  for,  herein  or in  the  Note  Purchase  Agreement  or in  any of the
documents  securing payment hereof or otherwise  relating  hereto,  then in such
event (a) the provisions of this paragraph shall govern and control, (b) neither
the  Company,  endorsers or  Restricted  Subsidiaries,  nor their  heirs,  legal
representatives,  successors  or  assigns  nor any other  party  liable  for the
payment  hereof,  shall be obligated  to pay the amount of such  interest to the
extent that it is in excess of the Maximum  Rate,  (c) any such excess which may
have been collected shall, at the election of the holder of this Note, be either
applied as a credit against the then unpaid  principal amount hereof or refunded
to the Company, and (d) the provisions hereof and of the Note Purchase Agreement
and any documents  securing  payment hereof shall be  automatically  reformed so
that the effective  rate of interest  shall be reduced to the Maximum Rate.  For
the purpose of determining the Maximum Rate, all interest  payments with respect
hereto shall be amortized,  prorated and spread  throughout the full term hereof
so that the effective rate of interest  hereunder is uniform throughout the term
hereof.


<PAGE>


     THIS NOTE AND THE NOTE  PURCHASE  AGREEMENT  ARE  GOVERNED BY, AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH, INTERNAL NEW YORK LAW.

                                            SEITEL, INC.

                                            By:
                                               ---------------------------------
                                                   Name:
                                                   Title:


<PAGE>


                                                                    EXHIBIT 4.10

                                FORM OF GUARANTY

     THIS  GUARANTY,  dated as of February 12, 1999 (as amended or restated from
time to time,  this  "Guaranty"),  by SEITEL DATA CORP., a Delaware  corporation
(together with its successors and assigns,  "SDC"), SEITEL GEOPHYSICAL,  INC., a
Delaware  corporation  (together  with its successors  and assigns,  "SG"),  DDD
ENERGY, INC., a Delaware corporation  (together with its successors and assigns,
"DDD"),  SEITEL GAS & ENERGY CORP.,  a Delaware  corporation  (together with its
successors  and assigns,  "SG&E"),  SEITEL POWER CORP.,  a Delaware  corporation
(together with its successors and assigns,  "SPC"),  SEITEL NATURAL GAS, INC., a
Delaware corporation  (together with its successors and assigns,  "SNG"), MATRIX
GEOPHYSICAL,  INC., a Delaware  corporation  (together  with its  successors and
assigns,   "MG"),  EXSOL,  INC.,  a  Delaware  corporation  (together  with  its
successors  and  assigns,  "EXSOL"),   DATATEL,  INC.,  a  Delaware  corporation
(together with its successors and assigns, "DATATEL"),  SEITEL OFFSHORE CORP., a
Delaware corporation  (together with its successors and assigns,  "SOC"), SEITEL
MANAGEMENT,  INC., a Delaware  corporation  (together  with its  successors  and
assigns,  "SMI"),  SEITEL DELAWARE,  INC., a Delaware corporation (together with
its successors and assigns, "SDI"), SEITEL INTERNATIONAL, INC., a Cayman Islands
corporation   (together  with  its  successors  and  assigns,   "SI"),   AFRICAN
GEOPHYSICAL,  INC., a Cayman Islands  corporation  (together with its successors
and assigns,  "AG"),  GEO-BANK,  INC., a Texas  corporation  (together  with its
successors and assigns, "GB"), ALTERNATIVE  COMMUNICATION  ENTERPRISES,  INC., a
Texas corporation  (together with its successors and assigns,  "ACE") and SEITEL
DATA,  LTD., a Texas  limited  partnership  (together  with its  successors  and
assigns,  "SDL" and SDC, SG, DDD, SG&E, SPC, SNG, MG, Exsol,  Datatel, SOC, SMI,
SDI, SI, AG, GB and ACE and each other corporation which becomes a party hereto,
each a "GUARANTOR" and, collectively, the "GUARANTORS"), in favor of each of the
Noteholders (as such term is hereinafter defined).

1.   PRELIMINARY STATEMENT.

     1.1 SEITEL, INC. (together with its successors and assigns, the "COMPANY"),
a Delaware  corporation,  has authorized the issuance of (i) its Series D Senior
Notes due  February  15, 2004 (as may be amended or restated  from time to time,
the  "SERIES D NOTES"),  in the  aggregate  principal  amount of Twenty  Million
Dollars ($20,000,000),  (ii) its Series E Senior Notes due February 15, 2009 (as
may be amended or restated  from time to time,  the  "SERIES E NOTES,"),  in the
aggregate principal amount of Seventy-Five  Million Dollars  ($75,000,000),  and
(iii) its  Series F Senior  Notes due  February  15,  2009 (as may be amended or
restated from time to time, the "SERIES F NOTES,"),  in the aggregate  principal
amount of Forty-Three Million Dollars ($43,000,000)  (together with the Series D
Notes and the Series E Notes,  the  "NOTES"),  pursuant  to those  certain  Note
Purchase  Agreements  (collectively,  as may be amended or restated from time to
time,  the "NOTE  PURCHASE  AGREEMENT"),  each dated as of  February  12,  1999,
entered  into  separately  between the Company  and,  respectively,  each of the
purchasers of the Notes named on Schedule A to the Note Purchase  Agreement (the
"PURCHASERS").

     1.2 In order to induce the  Purchasers  to purchase the Notes,  the Company
has  agreed,  pursuant  to the Note  Purchase  Agreement,  that  the  Restricted
Subsidiaries  (including each of the Guarantors) will be required to jointly and
severally guaranty  unconditionally  all of the obligations of the Company under
and in  respect of the Notes and the Note  Purchase  Agreement  pursuant  to the
terms and provisions hereof.

     1.3 Each Guarantor will receive direct and indirect economic, financial and
other benefits from the indebtedness  incurred under the Note Purchase Agreement
and the Notes by the Company,  and under this  Guaranty,  and the  incurrence of
such  indebtedness is in the best interests of each  Guarantor.  The Company and
the  Guarantors  have  explicitly  induced the  Purchasers to purchase the Notes
based upon and in reliance  upon the  consolidated  financial  condition  of the
Company and its subsidiaries, including the Guarantors.

     1.4 All acts and  proceedings  required  by law and by the  certificate  or
articles of  incorporation,  as the case may be, and  by-laws of each  Guarantor
necessary to constitute this Guaranty a valid and binding agreement for the uses
and purposes set forth  herein in  accordance  with its terms have been done and
taken,  and the  execution  and delivery  hereof has been in all  respects  duly
authorized.

2.   GUARANTY AND OTHER RIGHTS AND UNDERTAKINGS

     2.1 GUARANTIED OBLIGATIONS.

     Each Guarantor,  in consideration of the execution and delivery of the Note
Purchase  Agreement  and the  purchase  of the Notes by the  Purchasers,  hereby
irrevocably, unconditionally, absolutely, jointly and severally guarantees, on a
continuing basis, to each Noteholder, as and for the Guarantor's own debt, until
final and indefeasible payment has been made:

          (a) the due and punctual  payment by the Company of the  principal of,
     and interest,  and the Make-Whole Amount (if any) on, the Notes at any time
     outstanding and the due and punctual  payment of all other amounts payable,
     and all other  indebtedness  owing, by the Company to the Noteholders under
     the Note  Purchase  Agreement  and the Notes,  in each case when and as the
     same  shall  become  due and  payable,  whether at  maturity,  pursuant  to
     mandatory or optional  prepayment,  by  acceleration  or otherwise,  all in
     accordance with the terms and provisions  hereof and thereof;  it being the
     intent of the  Guarantors  that the  guaranty  set forth  herein shall be a
     continuing guaranty of payment and not a guaranty of collection; and

          (b) the punctual and faithful performance,  keeping,  observance,  and
     fulfillment  by  the  Company  of all  duties,  agreements,  covenants  and
     obligations of the Company contained in the Note Purchase Agreement and the
     Notes.

All of the  obligations  set forth in subsection  (a) and subsection (b) of this
Section  2.1 are  referred  to herein as the  "GUARANTIED  OBLIGATIONS"  and the
guaranty  thereof  contained  herein  is  a  primary,   original  and  immediate
obligation of each Guarantor and is an absolute,  unconditional,  continuing and
irrevocable  guaranty of payment and  performance and shall remain in full force
and effect  until the full,  final and  indefeasible  payment of the  Guarantied
Obligations.

     2.2 PERFORMANCE UNDER THE NOTE PURCHASE AGREEMENT.

     In the event the Company fails to pay, perform,  keep,  observe, or fulfill
any  Guarantied  Obligation  in the manner  provided in the Notes or in the Note
Purchase Agreement,  the Guarantors shall cause forthwith to be paid the moneys,
or to be performed,  kept, observed,  or fulfilled each of such obligations,  in
respect of which such  failure  has  occurred in  accordance  with the terms and
provisions of the Note Purchase  Agreement and the Notes.  In furtherance of the
foregoing, if an Event of Default shall exist, all of the Guarantied Obligations
shall,  subject to the applicable  grace and/or notice and cure periods provided
in the Note Purchase Agreement, forthwith become due and payable without notice,
regardless of whether the  acceleration of the Notes shall be stayed,  enjoined,
delayed or otherwise prevented.

     2.3 UNDERTAKINGS IN NOTE PURCHASE AGREEMENT.

     The Guarantors will comply with each of the  undertakings of the Company in
the Note Purchase  Agreement in respect of which the Company undertakes to cause
the  Guarantors  (in their  capacities,  respectively,  as a Guarantor  and as a
Restricted Subsidiary) to comply with such undertakings, as if such undertakings
(as they  apply to the  Guarantors)  were set  forth  at  length  herein  as the
undertakings of the Guarantors.

     2.4 RELEASES.

     Each Guarantor  consents and agrees that,  without any notice whatsoever to
or by such  Guarantor  and without  impairing,  releasing,  abating,  deferring,
suspending, reducing, terminating or otherwise affecting the obligations of such
Guarantor hereunder, each Noteholder, by action or inaction, may:

          (a)  compromise  or settle,  renew or extend the period of duration or
     the time for the payment,  or discharge the  performance  of, or may refuse
     to, or otherwise not, enforce,  or may, by action or inaction,  release all
     or any one or more  parties  to,  any one or more of the  Notes,  the  Note
     Purchase  Agreement,  any other guaranty or agreement or instrument related
     thereto or hereto;

          (b) assign, sell or transfer, or otherwise dispose of, any one or more
     of the Notes;

          (c) grant waivers,  extensions,  consents and other indulgences of any
     kind whatsoever to the Company or any Other Guarantor in respect of any one
     or more of the Notes,  the Note Purchase  Agreement,  any other guaranty or
     any agreement or instrument related thereto or hereto;

          (d) amend,  modify or supplement in any manner  whatsoever  and at any
     time (or from time to time) any one or more of the Notes, the Note Purchase
     Agreement,  any other  guaranty  or any  agreement  or  instrument  related
     hereto;

          (e)  release  or  substitute  any  one or  more  of the  endorsers  or
     guarantors of the Guarantied Obligations whether parties hereto or not; and

          (f)  sell,  exchange,  release,  surrender  or  enforce,  by action or
     inaction,  any  property  at any time  pledged or granted  as  security  in
     respect of the Guarantied Obligations, whether so pledged or granted by the
     Company,  such Guarantor or any Other  Guarantor,  or pursuant to any other
     guaranty or any agreement or instrument related hereto.

     2.5 WAIVERS.

     To the fullest extent permitted by law, each Guarantor does hereby waive:

          (a) any notice of

               (i) acceptance of this Guaranty;

               (ii) any purchase of the Notes under the Note Purchase Agreement,
          or the creation,  existence or  acquisition  of any of the  Guarantied
          Obligations,  or the amount of the Guarantied Obligations,  subject to
          such Guarantor's right to make inquiry of each Noteholder to ascertain
          the amount of the Guarantied  Obligations  owing to such Noteholder at
          any reasonable time,  PROVIDED that such Guarantor will look solely to
          the  Company  for  the   determination   of  the   identities  of  the
          Noteholders;

               (iii) any transfer of Notes from one Noteholder to another;

               (iv) any adverse change in the financial condition of the Company
          or  any  other  fact  that  might  increase,  expand  or  affect  such
          Guarantor's risk hereunder;

               (v) presentment for payment,  demand, protest, and notice thereof
          as to the Notes or any other instrument;

               (vi) any Default or Event of Default; and

               (vii) any kind or nature whatsoever to which such Guarantor might
          otherwise  be entitled  other than those  specifically  required to be
          given to such Guarantor pursuant to the terms of this Guaranty);

          (b) the right by statute or  otherwise  to require any  Noteholder  to
     institute suit against the Company or any Other Guarantor or to exhaust the
     rights and  remedies  of any  Noteholder  against  the Company or any Other
     Guarantor;

          (c) the  benefit  of any stay  (except  in  connection  with a pending
     appeal),  valuation,  appraisal,  redemption or extension law now or at any
     time hereafter in force which, but for this waiver,  might be applicable to
     any sale of property of the  Guarantor  made under any  judgment,  order or
     decree based solely on this Guaranty,  and the Guarantor  covenants that it
     will not at any time insist upon or plead,  or in any manner  claim or take
     the benefit or advantage of such law;

          (d) any defense or  objection  to the  absolute,  primary,  continuing
     nature,  or the  validity or  enforceability  of, or the amount  guaranteed
     pursuant to, this  Guaranty,  including,  without  limitation,  any defense
     based  on  (and  the  primary,   continuing   nature,   and  the  validity,
     enforceability and amount, of this Guaranty shall be unaffected by), any of
     the following:

               (i) any change in future conditions;

               (ii) any change of law;

               (iii) any invalidity or irregularity with respect to the issuance
          or assumption of any obligations (including,  without limitation,  the
          Note  Purchase  Agreement,  the Notes or any  agreement or  instrument
          related hereto) by the Company or any other Person;

               (iv) the  execution  and  delivery of any  agreement  at any time
          hereafter (including, without limitation, the Note Purchase Agreement,
          the  Notes or any  agreement  or  instrument  related  hereto)  by the
          Company or any other Person;

               (v) the genuineness,  validity,  regularity or  enforceability of
          any of the Guarantied Obligations;

               (vi) any default,  failure or delay, willful or otherwise, in the
          performance of any obligations by the Company or such Guarantor;

               (vii) any creditors'  rights,  bankruptcy,  receivership or other
          insolvency   proceeding   of  the  Company  or  such   Guarantor,   or
          sequestration  or  seizure  of any  property  of the  Company  or such
          Guarantor, or any merger, consolidation,  reorganization, dissolution,
          liquidation  or  winding  up or change in  corporate  constitution  or
          corporate  identity  or loss of  corporate  identity of the Company or
          such Guarantor;

               (viii) any  disability  or other  defense of the  Company or such
          Guarantor to payment and  performance  of all  Guarantied  Obligations
          other than the defense that the Guarantied Obligations shall have been
          fully and finally performed and indefeasibly paid;

               (ix) the cessation from any cause  whatsoever of the liability of
          the  Company  or  such   Guarantor   in  respect  of  the   Guarantied
          Obligations;

               (x) impossibility or illegality of performance on the part of the
          Company or such Guarantor under the Note Purchase Agreement, the Notes
          or this Guaranty;

               (xi)  any  change  of  the  circumstances  of the  Company,  such
          Guarantor or any other Person, whether or not foreseen or foreseeable,
          whether or not imputable to the Company or such Guarantor,  including,
          without   limitation,   impossibility  of  performance  through  fire,
          explosion,  accident, labor disturbance,  floods, droughts, embargoes,
          wars (whether or not declared),  civil commotions,  acts of God or the
          public enemy, delays or failure of suppliers or carriers, inability to
          obtain  materials,  economic  or  political  conditions,  or any other
          causes affecting performance,  or any other force majeure,  whether or
          not beyond the control of the Company or such Guarantor and whether or
          not of the kind hereinbefore specified;

               (xii)  any  attachment,   claim,  demand,  charge,  Lien,  order,
          process,  encumbrance  or any  other  happening  or event  or  reason,
          similar  or  dissimilar  to  the  foregoing,  or  any  withholding  or
          diminution  at  the  source,  by  reason  of any  taxes,  assessments,
          expenses,  indebtedness,  obligations or liabilities of any character,
          foreseen  or  unforeseen,  and  whether or not valid,  incurred  by or
          against any Person,  or any claims,  demands,  charges or Liens of any
          nature, foreseen or unforeseen, incurred by any Person, or against any
          sums  payable  under the Note  Purchase  Agreement or the Notes or any
          agreement  or  instrument  related  hereto so that such sums  would be
          rendered  inadequate  or would be  unavailable  to make the payment as
          herein provided;

               (xiii) any change in the  ownership of the equity  securities  of
          the Company,  such  Guarantor or any other Person liable in respect of
          the Notes; or

               (xiv) any other  action,  happening,  event or reason  whatsoever
          that shall delay,  interfere  with,  hinder or prevent,  or in any way
          adversely affect,  the performance by the Company or such Guarantor of
          any of its obligations under the Note Purchase Agreement, the Notes or
          this Guaranty.

     2.6 WAIVERS OF SUBROGATION, REIMBURSEMENT AND INDEMNITY.

     No  Guarantor  shall  have  any  right  of  subrogation,  reimbursement  or
indemnity whatsoever in respect of the Guarantied  Obligations,  or any right of
recourse to or with respect to any assets or property of the Company.

     2.7 INVALID PAYMENTS.

     To the extent the Company  makes a payment or  payments to any  Noteholder,
which  payment or payments or any part  thereof  are  subsequently  invalidated,
declared to be fraudulent or preferential, set aside or required, for any of the
foregoing  reasons  or for any  other  reason,  to be  repaid  or paid over to a
custodian, trustee, receiver or any other party or officer under any bankruptcy,
reorganization,  arrangement,  insolvency,  readjustment of debt, dissolution or
liquidation law of any jurisdiction,  state or federal law, or any common law or
equitable cause, then to the extent of such payment or repayment, the obligation
or part thereof  intended to be satisfied shall be revived and continued in full
force and effect as if said payment had not been made and each  Guarantor  shall
be primarily liable for such obligation.

     2.8 MARSHALING.

     Neither  any  Noteholder  nor any  Person  acting  for the  benefit  of any
Noteholder  shall be under any  obligation to marshal any assets in favor of any
Guarantor or against or in payment of any or all of the Guarantied Obligations.

     2.9 SETOFF, COUNTERCLAIM OR OTHER DEDUCTIONS.

     Except as otherwise required by law, each payment by any Guarantor shall be
made without setoff, counterclaim or other deduction.

     2.10 ELECTION BY GUARANTORS TO PERFORM OBLIGATIONS.

     Any  election  by the  Guarantor  to pay or  otherwise  perform  any of the
obligations of the Company under the Notes,  the Note Purchase  Agreement or any
agreement  or  instrument  related  hereto  shall not release the  Company,  the
Guarantor or any Other  Guarantor from such  obligations or any of such Person's
other obligations under the Notes, the Note Purchase  Agreement or any agreement
or instrument related hereto.

     2.11 NO ELECTION OF REMEDIES BY NOTEHOLDERS.

     To the extent  provided in the Note  Purchase  Agreement,  each  Noteholder
shall,  individually or  collectively,  have the right to seek recourse  against
each  Guarantor to the fullest extent  provided for herein for such  Guarantor's
obligations  under this Guaranty in respect of the  Guarantied  Obligations.  No
election to proceed in one form of action or  proceeding,  or against any party,
or on any obligation,  shall constitute a waiver of such  Noteholder's  right to
proceed  in any other form of action or  proceeding  or  against  other  parties
(including,  without limitation, any Other Guarantor) unless such Noteholder has
expressly waived such right in writing.  Specifically,  but without limiting the
generality of the foregoing,  no action or proceeding by any Noteholder  against
the  Company  or any  Guarantor  under any  document  or  instrument  evidencing
obligations of the Company or such Guarantor to such  Noteholder  shall serve to
diminish the  liability of such  Guarantor  under this  Guaranty,  except to the
extent that such Noteholder finally, indefeasibly and unconditionally shall have
realized  payment by such  action or  proceeding  in  respect of the  Guarantied
Obligations.

     2.12 SEPARATE ACTION; OTHER ENFORCEMENT RIGHTS.

     Each of the  rights  and  remedies  granted  under  this  Guaranty  to each
Noteholder in respect of the Notes held by such  Noteholder  may be exercised by
such  Noteholder  without notice by such Noteholder to, or the consent of or any
other action by, any other  Noteholder.  Each  Noteholder may proceed to protect
and enforce this Guaranty by suit or suits or proceedings  in equity,  at law or
in  bankruptcy,  and whether for the  specific  performance  of any  covenant or
agreement contained herein or in execution or aid of any power herein granted or
for the recovery of judgment for the  obligations  hereby  guarantied or for the
enforcement  of any other  proper,  legal or equitable  remedy  available  under
applicable law.

     2.13 NOTEHOLDER SETOFF.

     Each Noteholder shall have, to the fullest extent permitted by law and this
Guaranty,  a right of set-off  against any and all credits and any and all other
property of each or all of the Guarantors,  now or at any time whatsoever,  with
or in the possession of, such Noteholder,  or anyone acting for such Noteholder,
to ensure the full  performance  of any and all  obligations  of the  Guarantors
hereunder.

     2.14 DELAY OR OMISSION; NO WAIVER.

     No course of dealing on the part of any  Noteholder and no delay or failure
on the part of any such Person to exercise any right hereunder shall impair such
right or operate as a waiver of such right or otherwise  prejudice such Person's
rights,  powers and  remedies  hereunder.  Every right and remedy  given by this
Guaranty or by law to any Noteholder may be exercised from time to time as often
as may be deemed expedient by such Person.

     2.15 RESTORATION OF RIGHTS AND REMEDIES.

     If any Noteholder shall have instituted any proceeding to enforce any right
or remedy  under this  Guaranty or under any Note held by such  Noteholder,  and
such  proceeding  shall have been  dismissed,  discontinued or abandoned for any
reason, or shall have been determined adversely to such Noteholder,  then and in
every such case each such  Noteholder,  the  Company and each  Guarantor  shall,
except as may be limited or affected by any  determination  (including,  without
limitation,  any  determination  in connection  with any such dismissal) in such
proceeding,  be restored  severally and  respectively  to its respective  former
positions hereunder and thereunder,  and thereafter,  subject as aforesaid,  the
rights  and  remedies  of such  Noteholders  shall  continue  as  though no such
proceeding had been instituted.

     2.16 CUMULATIVE REMEDIES.

     No remedy under this Guaranty,  the Note Purchase Agreement or the Notes is
intended to be exclusive of any other remedy, but each and every remedy shall be
cumulative  and in addition to any and every other remedy given pursuant to this
Guaranty, the Note Purchase Agreement or the Notes.

     2.17 LIMITATION ON GUARANTIED OBLIGATIONS.

     It is the intention of each Guarantor and each  Noteholder that the maximum
amount of the obligations of any Guarantor  hereunder shall be equal to, but not
in excess of, the amount equal to the lesser of

          (a) the Guarantied Obligations, and

          (b) the maximum amount permitted by applicable law.

To that end, with respect to the  determination of the "maximum amount permitted
by applicable law," but only to the extent such  obligations  would otherwise be
avoidable,  the obligations of each Guarantor  hereunder shall be limited to the
maximum amount that,  after giving effect to the incurrence  thereof,  would not
render such  Guarantor  insolvent or unable to pay its debts (within the meaning
of Title 11 of the United States Code or as defined in the analogous  applicable
law) as they mature or leave such Guarantor with an unreasonably  small capital.
The need for any  such  limitation  shall  be  determined,  and any such  needed
limitation  shall be  effective,  at the time or times  that such  Guarantor  is
deemed,  under  applicable  law,  to  incur  obligations  hereunder.   Any  such
limitation  shall be apportioned  among the Guarantied  Obligations  owed to the
Noteholders  PRO RATA.  This  Section  2.17 is intended  solely to preserve  the
rights  of  each  Noteholder  hereunder  to  the  maximum  extent  permitted  by
applicable  law, and neither the  Guarantors nor any other Person shall have any
rights under this Section 2.17 that it would not otherwise have under applicable
law. For the purposes of this Section 2.17,  "insolvency",  "unreasonably  small
capital" and  "inability  to pay debts (as so defined) as they mature"  shall be
determined in accordance with applicable law.

     2.18 MAINTENANCE OF OFFICES.

     The Guarantors  will maintain an office at the address set forth in Section
5.3 where notices,  presentations and demands in respect of this Guaranty may be
made upon them.  Such office will be  maintained at such address until such time
as any Guarantor  shall notify the Noteholders of any change of location of such
office.

     2.19 FURTHER ASSURANCES.

     Each Guarantor will cooperate with the Noteholders and execute such further
instruments and documents as the Required  Holders shall  reasonably  request to
carry  out,  to  the  reasonable  satisfaction  of  the  Required  Holders,  the
transactions  contemplated  by the Note  Purchase  Agreements,  the Notes,  this
Guaranty and the documents and instruments related thereto.

     2.20 PARI PASSU.

     Each Guarantor  covenants that its  obligations  under this Guaranty do and
will rank at least PARI PASSU with all its other  present  and future  unsecured
Senior Debt.

3.   INTERPRETATION OF THIS GUARANTY

     3.1 TERMS DEFINED.

     As used in this Guaranty,  the capitalized terms have the meaning specified
in the Note Purchase Agreement unless otherwise  specified below or set forth in
the section of this Guaranty  referred to immediately  following such term (such
definitions,  unless otherwise expressly  provided,  to be equally applicable to
both the singular and plural forms of the terms defined):

     ACE -- has the meaning assigned to such term in the first paragraph hereof.

     AG -- has the meaning assigned to such term in the first paragraph hereof.

     COMPANY -- Section 1.1.

     DATATEL -- has the  meaning  assigned  to such term in the first  paragraph
hereof.

     DDD -- has the meaning assigned to such term in the first paragraph hereof.

     EXSOL -- has the  meaning  assigned  to such  term in the  first  paragraph
hereof.

     GB -- has the meaning assigned to such term in the first paragraph hereof.

     GUARANTIED OBLIGATIONS -- Section 2.1.

     GUARANTOR -- has the meaning  assigned to such term in the first  paragraph
hereof.

     GUARANTY,  THIS -- has the  meaning  assigned  to  such  term in the  first
paragraph hereof.

     MG -- has the meaning assigned to such term in the first paragraph hereof.

     NOTE PURCHASE AGREEMENT -- Section 1.1.

     NOTEHOLDER  -- means,  at any time,  each  Person that is the holder of any
Note at such time.

     NOTES -- Section 1.1.

     OTHER GUARANTORS -- means, at any time with respect to any Guarantor,  each
other Guarantor and all other guarantors of the Company's  obligations under the
Note Purchase Agreement and the Notes at such time.

     PURCHASERS -- Section 1.1.

     SDC -- has the meaning assigned to such term in the first paragraph hereof.

     SENIOR  DEBT -- means,  with  respect  to any  Guarantor,  any Debt of such
Guarantor that is not in any manner subordinated in right of payment or security
in any respect to the Debt  evidenced  by this  Guaranty or to any other Debt of
such Guarantor.

     SERIES D NOTES -- Section 1.1.

     SERIES E NOTES -- Section 1.1.

     SERIES F NOTES -- Section 1.1.

     SD -- has the meaning assigned to such term in the first paragraph hereof.

     SDI -- has the meaning assigned to such term in the first paragraph
hereof.

     SDL -- has the meaning assigned to such term in the first paragraph hereof.

     SG -- has the meaning assigned to such term in the first paragraph hereof.

     SG&E -- has  the  meaning  assigned  to such  term in the  first  paragraph
hereof.

     SI -- has the meaning assigned to such term in the first paragraph hereof.

     SMI -- has the meaning assigned to such term in the first paragraph hereof.

     SNG -- has the meaning assigned to such term in the first paragraph
hereof.

     SOC -- has the meaning assigned to such term in the first paragraph hereof.

     SPC -- has the meaning assigned to such term in the first paragraph hereof.

     3.2 SECTION HEADINGS AND CONSTRUCTION.

               (a) SECTION HEADINGS, ETC. The titles of the Sections appear as a
          matter of convenience  only, do not constitute a part hereof and shall
          not affect the  construction  hereof.  The words  "herein,"  "hereof,"
          "hereunder"  and "hereto" refer to this Guaranty as a whole and not to
          any particular Section or other subdivision.

               (b)  CONSTRUCTION.   Each  covenant  contained  herein  shall  be
          construed  (absent  an  express  contrary  provision  herein) as being
          independent of each other covenant  contained  herein,  and compliance
          with any one  covenant  shall not  (absent  such an  express  contrary
          provision)  be  deemed  to excuse  compliance  with one or more  other
          covenants.


<PAGE>


4.   WARRANTIES AND REPRESENTATIONS

     Each Guarantor represents and warrants to each Purchaser, as of the date of
effectiveness hereof, as follows:

     4.1 GENERALLY.

          (a) Such  Guarantor is fully aware of the  financial  condition of the
     Company.  Such  Guarantor  delivers this Guaranty based solely upon its own
     independent  investigation  and  in no  part  upon  any  representation  or
     statement  of any  one or  more  Noteholders  with  respect  thereto.  Such
     Guarantor   is  in  a  position  to  obtain,   and  hereby   assumes   full
     responsibility  for obtaining,  any additional  information  concerning the
     financial  condition of the Company as such  Guarantor may deem material to
     its  obligations  hereunder,  and such  Guarantor is not relying upon,  nor
     expecting,  any  Noteholder to furnish it any  information  concerning  the
     financial condition of the Company.

          (b) As of the date of the execution and delivery of this Guaranty, the
     fair  salable  value of the  assets  of such  Guarantor,  taken as a whole,
     exceeds its  liabilities,  taken as a whole;  such Guarantor is able to pay
     and discharge all of its debts (including,  without limitation, its current
     liabilities) as they become due and after giving effect to the transactions
     contemplated by this Guaranty, such Guarantor will not become unable to pay
     and discharge such debts as they become due; there are no presently pending
     material  court or  administrative  proceedings or  undischarged  judgments
     against  such  Guarantor;  and no tax liens have been  filed or  threatened
     against such Guarantor, nor is such Guarantor in default or claimed default
     under any agreement for borrowed money.

          (c)  Such  Guarantor  is a  corporation  duly  organized  and  validly
     existing  and in  good  standing  under  the  laws of its  jurisdiction  of
     incorporation. Such Guarantor has the corporate power to own its properties
     and carry on its business as it is now being conducted.  Such Guarantor has
     the valid authority and the corporate power to enter into and perform,  and
     has taken  all  necessary  action to  authorize  its  entry  into,  and the
     performance   and   delivery  of,  this   Guaranty  and  the   transactions
     contemplated hereby.

          (d) This Guaranty has been duly authorized by all necessary  action on
     the part of such  Guarantor,  has been duly  executed and delivered by duly
     authorized  officers of such Guarantor,  and constitutes a legal, valid and
     binding obligation of such Guarantor.

          (e)  The  entry  into  and   performance  of  this  Guaranty  and  the
     transactions  contemplated  hereby  do not and will not  conflict  with any
     applicable law or regulation or official or judicial  order,  conflict with
     the  articles  or  certificate  of  incorporation,  as the case may be,  or
     by-laws,  of such  Guarantor,  conflict  with any  agreement or document to
     which such  Guarantor  is a party or that is binding  upon it or any of its
     properties,  or result in the creation or  imposition of any Lien on any of
     its properties pursuant to the provisions of any agreement or document.

     4.2 NATURE OF BUSINESS OF COMPANY AND RESTRICTED SUBSIDIARIES.

     The Company and the  Restricted  Subsidiaries  have sought and obtained the
Note  Purchase  Agreement,  the sale of the Notes and the  related  transactions
based  upon  their  consolidated  financial  position  and the  Company  and the
Restricted  Subsidiaries  understand  that the  Purchasers  are relying upon the
consolidated financial condition of the Company and the Restricted  Subsidiaries
in purchasing the Notes. Nothing herein shall be deemed to prohibit any transfer
by the  Company or any  Restricted  Subsidiary  of any of its or a  Subsidiary's
stock  otherwise  permitted  under the terms and provisions of the Note Purchase
Agreement.

     4.3 SOLVENCY.

     The fair value of the  business  and assets of each of the  Company and the
Guarantors  exceeds  the amount  that will be  required  to pay its  liabilities
(including,  without  limitation,   contingent,   subordinated,   unmatured  and
unliquidated  liabilities  on existing  debts,  as such  liabilities  may become
absolute  and  matured),  in each case after giving  effect to the  transactions
contemplated  by the Note  Purchase  Agreement,  the  Notes  and this  Guaranty,
including,  without  limitation,  the  provisions of Section  2.17.  None of the
Guarantors nor the Company, after giving effect to the transactions contemplated
by the Note Purchase Agreement,  the Notes and this Guaranty,  will be insolvent
or will be engaged in any  business  or  transaction,  or about to engage in any
business or transaction,  for which such Person has unreasonably small assets or
capital (within the meaning of the Uniform Fraudulent  Transfer Act, the Uniform
Fraudulent  Conveyance  Act and  Section  548 of Title 11 of the  United  States
Code),  and none of the  Guarantors  nor the  Company  has any intent to hinder,
delay or defraud any entity to which it is, or will become, on or after the date
of the Closing,  indebted or incur debts that would be beyond its ability to pay
as they mature.

5.   MISCELLANEOUS

     5.1 SUCCESSORS AND ASSIGNS.

          (a) Whenever any  Guarantor or any of the parties to the Note Purchase
     Agreement  is referred  to, such  reference  shall be deemed to include the
     successors and assigns of such party,  and all the covenants,  promises and
     agreements  contained  in this  Guaranty by or on behalf of such  Guarantor
     shall bind the  successors and assigns of such Guarantor and shall inure to
     the  benefit  of each of the  Noteholders  from  time  to time  whether  so
     expressed or not and whether or not an assignment  of the rights  hereunder
     shall  have been  delivered  in  connection  with any  assignment  or other
     transfer of Notes.

          (b) Each  Guarantor  agrees to take such  action as may be  reasonably
     requested by any  Noteholder  to confirm such  Guarantor's  Guaranty of the
     Guarantied Obligations in connection with the transfer of the Notes of such
     Noteholder.

     5.2 PARTIAL INVALIDITY.

     The  unenforceability  or invalidity of any provision or provisions  hereof
shall  not  render  any  other   provision  or   provisions   contained   herein
unenforceable or invalid.

     5.3 COMMUNICATIONS.

               (a) METHOD;  ADDRESS.  All  communications  hereunder shall be in
          writing,  shall  be  delivered  in the  manner  required  by the  Note
          Purchase Agreement,  and shall be addressed, if to the Guarantors,  at
          the  address  set  forth  on  Annex  1  hereto,  and  if to any of the
          Noteholders:

               (A) if such  Noteholder is a Purchaser,  at the address set forth
          on Schedule A to the Note Purchase Agreement for such Noteholder,  and
          further including any parties referred to on such Schedule A which are
          required to receive notices in addition to such Noteholder, and

               (B) if such  Noteholder  is not a  Purchaser,  at the address set
          forth in the  register  for the  registration  and  transfer  of Notes
          maintained pursuant to Section 13.1 of the Note Purchase Agreement for
          such Noteholder,

     or to any such party at such other  address as such party may  designate by
     notice duly given in accordance with this Section 5.3.

               (b) WHEN GIVEN.  Any  communication  addressed  and  delivered as
          herein provided shall be deemed to be received when actually delivered
          to the address of the addressee  (whether or not delivery is accepted)
          or  received  by  the   telecopy   machine  of  the   recipient.   Any
          communication not so addressed and delivered shall be ineffective.

     5.4 GOVERNING LAW.

     THIS GUARANTY  SHALL BE CONSTRUED,  INTERPRETED  AND ENFORCED IN ACCORDANCE
WITH, AND GOVERNED BY, THE INTERNAL LAWS OF THE STATE OF NEW YORK.

     5.5 EFFECTIVE DATE.

     This Guaranty shall be effective as of the date hereof.

     5.6 BENEFITS OF GUARANTY RESTRICTED TO NOTEHOLDERS.

     Nothing  express  or  implied  in this  Guaranty  is  intended  or shall be
construed to give to any Person other than the  Guarantors,  the Noteholders and
the Noteholders'  successors and assigns any legal or equitable right, remedy or
claim under or in respect hereof or any covenant, condition or provision therein
or herein contained,  and all such covenants,  conditions and provisions are and
shall be held to be for the sole and exclusive  benefit of the  Guarantors,  the
Noteholders and the Noteholders' successors and assigns.


<PAGE>



     5.7 SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT.

     All representations  and warranties  contained herein or made in writing by
the  Guarantors in connection  herewith shall survive the execution and delivery
hereof.

     5.8 EXPENSES.

          (a) The  Guarantors  shall pay when  billed the  reasonable  costs and
     expenses (including reasonable attorneys' fees) incurred by the Noteholders
     in connection with the consideration, negotiation, preparation or execution
     of any  amendments,  waivers,  consents,  standstill  agreements  and other
     similar agreements with respect hereto (whether or not any such amendments,
     waivers,  consents,  standstill  agreements or other similar agreements are
     executed).

          (b) At any time when any one or more of the Company or the  Guarantors
     and the Noteholders are conducting restructuring or workout negotiations in
     respect  hereof,  or a Default or Event of Default  exists,  the Guarantors
     shall  pay  when  billed  the  reasonable  costs  and  expenses  (including
     reasonable   attorneys'  fees  and  the  reasonable  fees  of  professional
     advisors)  incurred by the  Noteholders in connection  with the assessment,
     analysis  or  enforcement  of any  rights  or  remedies  that are or may be
     available to the Noteholders.

          (c) If the Guarantors  shall fail to pay when due any principal of, or
     Make-Whole  Amount or interest on, any Note,  the  Guarantors  shall pay to
     each  Noteholder,  to the extent permitted by law, such amounts as shall be
     sufficient  to cover the costs and  expenses,  including but not limited to
     reasonable  attorneys' fees,  incurred by such Noteholder in collecting any
     sums due on such Notes.

     5.9 AMENDMENT.

     This Guaranty may be amended only in a writing  executed by the  Guarantors
and the  Required  Holders  except  that no  release of any  Guarantor  from its
obligations  hereunder  shall be  effected  without  the  consent  of all of the
Noteholders.

     5.10 CONSENT TO JURISDICTION; APPOINTMENT OF AGENT.

               (a) Consent to Jurisdiction.  EACH GUARANTOR  HEREBY  IRREVOCABLY
          AND UNCONDITIONALLY AGREES THAT ANY SUIT, ACTION OR PROCEEDING ARISING
          OUT OF OR RELATING TO THIS  GUARANTY,  OR ANY ACTION OR  PROCEEDING TO
          EXECUTE OR  OTHERWISE  ENFORCE  ANY  JUDGMENT IN RESPECT OF ANY BREACH
          HEREUNDER,  BROUGHT BY ANY NOTEHOLDER AGAINST SUCH GUARANTOR OR ANY OF
          ITS  PROPERTY,  MAY BE  BROUGHT  BY  SUCH  NOTEHOLDER  IN ANY  FEDERAL
          DISTRICT  COURT  LOCATED  IN NEW YORK  CITY,  NEW YORK OR ANY NEW YORK
          STATE COURT SITTING IN NEW YORK CITY, NEW YORK, AS SUCH NOTEHOLDER MAY
          IN ITS SOLE  DISCRETION  ELECT,  AND BY THE  EXECUTION AND DELIVERY OF
          THIS GUARANTY,  SUCH GUARANTOR IRREVOCABLY AND UNCONDITIONALLY SUBMITS
          TO THE NON-EXCLUSIVE IN PERSONAM  JURISDICTION OF EACH SUCH COURT, AND
          SUCH  GUARANTOR  IRREVOCABLY  WAIVES  AND  AGREES NOT TO ASSERT IN ANY
          PROCEEDING  BEFORE ANY  TRIBUNAL,  BY WAY OF  MOTION,  AS A DEFENSE OR
          OTHERWISE,  ANY  CLAIM  THAT  IT IS NOT  SUBJECT  TO  THE IN  PERSONAM
          JURISDICTION  OF ANY SUCH COURT.  IN ADDITION,  SUCH GUARANTOR  HEREBY
          IRREVOCABLY  WAIVES,  TO THE  FULLEST  EXTENT  PERMITTED  BY LAW,  ANY
          OBJECTION  THAT IT MAY NOW OR HEREAFTER HAVE TO THE LAYING OF VENUE IN
          ANY SUIT,  ACTION OR  PROCEEDING  ARISING  OUT OF OR  RELATING TO THIS
          GUARANTY BROUGHT IN ANY SUCH COURT, AND HEREBY  IRREVOCABLY WAIVES ANY
          CLAIM THAT ANY SUCH  SUIT,  ACTION OR  PROCEEDING  BROUGHT IN ANY SUCH
          COURT HAS BEEN BROUGHT IN AN INCONVENIENT FORUM.  NOTHING HEREIN SHALL
          IN ANY WAY BE DEEMED TO LIMIT THE  ABILITY OR RIGHT OF ANY  NOTEHOLDER
          TO OBTAIN  JURISDICTION OVER SUCH GUARANTOR IN SUCH OTHER JURISDICTION
          AS MAY BE PERMITTED BY APPLICABLE LAW.

               (b)  Agent  for  Service  of  Process.   EACH  GUARANTOR   HEREBY
          IRREVOCABLY  AND  UNCONDITIONALLY  AGREES THAT PROCESS  SERVED  EITHER
          PERSONALLY  OR BY  REGISTERED  OR CERTIFIED  MAIL WITH RETURN  RECEIPT
          REQUESTED (POSTAGE PREPAID) SHALL CONSTITUTE,  TO THE EXTENT PERMITTED
          BY LAW,  ADEQUATE SERVICE OF PROCESS IN ANY SUIT, ACTION OR PROCEEDING
          ARISING  OUT  OF OR  RELATING  TO  THIS  GUARANTY,  OR ANY  ACTION  OR
          PROCEEDING TO EXECUTE OR OTHERWISE  ENFORCE ANY JUDGMENT IN RESPECT OF
          ANY BREACH HEREUNDER, BROUGHT BY ANY NOTEHOLDER AGAINST SUCH GUARANTOR
          OR ANY OF  ITS  PROPERTY.  RECEIPT  OF  PROCESS  SO  SERVED  SHALL  BE
          CONCLUSIVELY  PRESUMED AS EVIDENCED BY A DELIVERY RECEIPT FURNISHED BY
          THE UNITED STATES POSTAL SERVICE OR ANY COMMERCIAL  DELIVERY  SERVICE.
          WITHOUT LIMITING THE FOREGOING, SUCH GUARANTOR HEREBY APPOINTS, IN THE
          CASE OF ANY SUCH ACTION OR  PROCEEDING  BROUGHT IN THE COURTS OF OR IN
          THE STATE OF NEW YORK:

                  CT CORPORATION SYSTEM
                  1633 BROADWAY
                  NEW YORK, NEW YORK 10019

TO RECEIVE, FOR IT AND ON ITS BEHALF,  SERVICE OF PROCESS.  EACH GUARANTOR SHALL
AT ALL TIMES MAINTAIN AN AGENT FOR SERVICE OF PROCESS IN NEW YORK CITY, NEW YORK
AND MAY FROM TIME TO TIME  APPOINT  SUCCEEDING  AGENTS FOR SERVICE OF PROCESS BY
NOTIFYING EACH NOTEHOLDER OF SUCH APPOINTMENT,  WHICH AGENTS SHALL BE ATTORNEYS,
OFFICERS OR DIRECTORS OF SUCH GUARANTOR,  OR CORPORATIONS  WHICH IN THE ORDINARY
COURSE OF BUSINESS ACT AS AGENTS FOR SERVICE OF PROCESS. NOTHING HEREIN SHALL IN
ANY WAY BE DEEMED TO LIMIT THE ABILITY OR RIGHT OF ANY  NOTEHOLDER  TO SERVE ANY
WRITS, PROCESS OR SUMMONSES IN ANY MANNER PERMITTED BY APPLICABLE LAW.

     5.11 SURVIVAL.

     So long as the Guarantied  Obligations  and all payment  obligations of the
Guarantors  hereunder  shall  not have  been  fully and  finally  performed  and
indefeasibly paid, the obligations of the Guarantors hereunder shall survive the
transfer and payment of any Note and the payment in full of all the Notes.

     5.12 ENTIRE AGREEMENT.

     This Guaranty Agreement  constitutes the final written expression of all of
the terms hereof and is a complete and exclusive statement of those terms.

     5.13 DUPLICATE ORIGINALS, EXECUTION IN COUNTERPART.

     Two or more duplicate  originals hereof may be signed by the parties,  each
of which shall be an original but all of which together shall constitute one and
the same instrument.  This Guaranty may be executed in one or more  counterparts
and shall be  effective  as to each party  hereto when at least one  counterpart
shall have been  executed  by such  party,  and each set of  counterparts  that,
collectively, show execution by each party hereto shall constitute one duplicate
original.

     5.14 ADDITIONAL GUARANTORS.

     In addition to SDC, SG, DDD, SG&E, SPC, SNG, MG, Exsol,  Datatel,  SOC, SI,
SMI, SDI, GB, ACE and SDL, other Restricted  Subsidiaries may become  Guarantors
hereunder  in  accordance  with the  terms of the Note  Purchase  Agreement,  by
execution of the form of Joinder Agreement attached hereto as Annex 2.

     5.15 RELEASE OF GUARANTORS.

     Without any action  required of any  Noteholder but subject to Section 2.7,
any Guarantor shall be released from its obligations under this Guaranty upon

          (a) the designation of such Guarantor as an Unrestricted Subsidiary by
     the Company pursuant to the provisions of the Note Purchase Agreement, or

          (b) the disposition of such Guarantor  pursuant to the Section 10.5 or
     Section 10.6 of the Note Purchase Agreement,

PROVIDED  that   immediately   after  giving  effect  to  such   designation  or
disposition,  as the case may be, no Default or Event of Default  under the Note
Purchase  Agreement would exist.  The  Noteholders  shall, at the expense of the
Company  or  said  Guarantor,  execute  and  deliver  such  documents  as may be
reasonably necessary to evidence such release.

                         [Next page is signature page.]


<PAGE>


         IN WITNESS  WHEREOF,  each  Guarantor  has caused  this  Guaranty to be
executed on its behalf by one of its duly authorized officers.

                                            SEITEL DATA CORP.

                                            By /s/ Kurt Krahnke
                                               ---------------------------------
                                            Name: Kurt Krahnke
                                            Title: Vice President

                                            SEITEL  GEOPHYSICAL,  INC.;
                                            DDD  ENERGY,  INC.;
                                            SEITEL GAS & ENERGY CORP.;
                                            SEITEL POWER CORP.;
                                            SEITEL NATURAL GAS, INC.;
                                            MATRIX GEOPHYSICAL, INC.;
                                            EXSOL, INC.;
                                            DATATEL, INC.;
                                            SEITEL OFFSHORE CORP.;
                                            SEITEL INTERNATIONAL, INC.;
                                            AFRICAN GEOPHYSICAL, INC.;
                                            GEO-BANK, INC.;
                                            ALTERNATIVE COMMUNICATION
                                              ENTERPRISES, INC.; AND
                                            SEITEL DELAWARE, INC.

                                            By /s/ DEBRA D. VALICE
                                               ---------------------------------
                                            Name: Debra D. Valice
                                            Title: Vice President

                                            SEITEL MANAGEMENT, INC.

                                            By /s/ DEBRA D. VALICE
                                               ---------------------------------
                                            Name: Debra D. Valice
                                            Title: President

                                            SEITEL DATA, LTD.
                                            BY: Seitel Delaware, Inc.,
                                                   general partner

                                            By /s/ DEBRA D. VALICE
                                               ---------------------------------
                                            Name: Debra D. Valice
                                            Title: Vice President


<PAGE>


                                     ANNEX 1

                              ADDRESS OF GUARANTORS

SEITEL DATA CORP.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL GEOPHYSICAL, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


DDD ENERGY, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL GAS & ENERGY CORP.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL POWER CORP.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL NATURAL GAS, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


MATRIX GEOPHYSICAL, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


EXSOL, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


<PAGE>


DATATEL, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL OFFSHORE CORP.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL INTERNATIONAL, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


AFRICAN GEOPHYSICAL, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


GEO-BANK, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


ALTERNATIVE COMMUNICATION
  ENTERPRISES, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL DELAWARE, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL MANAGEMENT, INC.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


SEITEL DATA, LTD.
West Building, 7th Floor
50 Briar Hollow Lane
Houston, Texas 77027


<PAGE>
E                                     ANNEX 2

                           [FORM OF JOINDER AGREEMENT]

                                                                          [DATE]

To each of the Noteholders (as defined in the Guaranty
     Agreement hereinafter referred to)

Ladies and Gentlemen:

     Reference  is made to the  Guaranty,  dated  as of  February  12,  1999 (as
amended or restated from time to time, the "GUARANTY"),  by SEITEL DATA CORP., a
Delaware corporation  (together with its successors and assigns,  "SDC"), SEITEL
GEOPHYSICAL,  INC., a Delaware  corporation  (together  with its  successors and
assigns,  "SG"),  DDD ENERGY,  INC., a Delaware  corporation  (together with its
successors  and  assigns,   "DDD"),  SEITEL  GAS  &  ENERGY  CORP.,  a  Delaware
corporation  (together with its successors  and assigns,  "SG&E"),  SEITEL POWER
CORP., a Delaware corporation (together with its successors and assigns, "SPC"),
SEITEL NATURAL GAS, INC., a Delaware  corporation  (together with its successors
and assigns, "SNG"), MATRIX GEOPHYSICAL,  INC., a Delaware corporation (together
with its  successors and assigns,  "MG"),  EXSOL,  INC., a Delaware  corporation
(together with its successors and assigns,  "EXSOL"),  DATATEL, INC., a Delaware
corporation  (together  with its  successors  and  assigns,  "DATATEL"),  SEITEL
OFFSHORE  CORP.,  a  Delaware  corporation  (together  with its  successors  and
assigns, "SOC"), SEITEL MANAGEMENT,  INC., a Delaware corporation (together with
its  successors  and  assigns,   "SMI"),  SEITEL  DELAWARE,   INC.,  a  Delaware
corporation   (together  with  its  successors  and  assigns,   "SDI"),   SEITEL
INTERNATIONAL,  INC., a Cayman Islands corporation (together with its successors
and assigns,  "SI"),  AFRICAN  GEOPHYSICAL,  INC., a Cayman Islands  corporation
(together  with its  successors  and  assigns,  "AG"),  GEO-BANK,  INC., a Texas
corporation  (together  with its  successors  and  assigns,  "GB"),  ALTERNATIVE
COMMUNICATION  ENTERPRISES,   INC.,  a  Texas  corporation  (together  with  its
successors and assigns,  "ACE") and SEITEL DATA, LTD., a Texas limited liability
partnership  (together with its successors and assigns,  "SDL" and SDC, SG, DDD,
SG&E, SPC, SNG, MG, Exsol,  Datatel,  SOC, SMI, SDI, SI, AG, GB and ACE and each
other  corporation  which  becomes  a  party  hereto,  each a  "GUARANTOR"  and,
collectively,  the  "GUARANTORS"),  in favor of each of the Noteholders (as such
term  is  defined  in the  Guaranty).  Capitalized  terms  used  herein  and not
otherwise defined have the meanings ascribed to such terms in the Guaranty.

     [NEW  GUARANTOR],  a  [jurisdiction  of  incorporation]   corporation  (the
"COMPANY"), agrees with you as follows:

     1. GUARANTY.  The Company hereby  unconditionally  and expressly  agrees to
become a party to the  Guaranty and to perform and observe each and every one of
the  covenants,   agreements,   terms,  conditions,   obligations,   duties  and
liabilities of a Guarantor thereunder, and that all references to the Guarantors
in the Guaranty or any document,  instrument or agreement executed and delivered
or  furnished,  or to be executed and  delivered  or  furnished,  in  connection
therewith  shall be deemed to be  references  which  include the  Company,  as a
Guarantor.

     2.  WARRANTIES  AND  REPRESENTATIONS.   The  Company  hereby  warrants  and
represents that each of the warranties and representations set forth in Sections
4.1 through 4.3, inclusive,  of the Guaranty,  are true and correct with respect
to the Company as of the date hereof and such warranties and representations are
incorporated by reference  herein in their entirety.  Such  representations  and
warranties shall survive the execution and delivery hereof.

     3. FURTHER ASSURANCES. The Company agrees to cooperate with the Noteholders
and execute such further instruments and documents as the Required Holders shall
reasonably  request to effect,  to the reasonable  satisfaction  of the Required
Holders, the purposes of this Agreement.

     4. AMENDMENT.  This Agreement may be amended only in a writing  executed by
the Company and the Required Holders.

     5. BINDING  EFFECT.  This  Agreement  shall be binding upon the Company and
shall inure to the benefit of the  Noteholders and their  respective  successors
and assigns.

     6. GOVERNING LAW; SUBMISSION TO JURISDICTION; AGENT FOR SERVICE OF PROCESS.
This Agreement shall be construed,  interpreted and enforced in accordance with,
and governed by, the internal laws of the State of New York.  The  provisions of
Section 5.10 of the Guaranty  shall apply to this Agreement as if each reference
to "this Guaranty" therein was a reference to this Agreement.

     IN WITNESS WHEREOF, the Company has caused this Agreement to be executed on
its behalf by one of its duly authorized officers.

                                            [NEW GUARANTOR]

                                            By
                                              ----------------------------------
                                            Name:
                                            Title:



                                                                    EXHIBIT 21.1

                                  SEITEL, INC.

                     LIST OF SUBSIDIARIES OF THE REGISTRANT

**       African Geophysical, Inc. (incorporated in Cayman Islands)

**       Alternative Communication Enterprises, Inc. (incorporated in Texas)

         Datatel, Inc. (incorporated in Delaware)

         DDD Energy, Inc. (incorporated in Delaware)

         EHI Holdings, Inc. (incorporated in Delaware)

**       Exsol, Inc. (incorporated in Delaware)

**       GEO-BANK, INC. (incorporated in Texas)

         Matrix Geophysical, Inc. (incorporated in Delaware)

*        Olympic Seismic Ltd. (incorporated in Alberta, Canada)

         Seitel Canada Holdings, Inc. (incorporated in Delaware)

         Seitel Data Corp. (incorporated in Delaware)

         Seitel Delaware, Inc. (incorporated in Delaware)

**       Seitel Gas & Energy Corp. (incorporated in Delaware)

         Seitel Geophysical Inc. (incorporated in Delaware)

         Seitel International, Inc. (incorporated in Cayman Islands)

         Seitel Management, Inc. (incorporated in Delaware)

**       Seitel Natural Gas, Inc. (incorporated in Delaware)

         Seitel Offshore Corp. (incorporated in Delaware)

**       Seitel Power Corp. (incorporated in Delaware)






*        Incorporated in 1998
**       Dormant


                                                                    EXHIBIT 23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS




As independent  public  accountants,  we hereby consent to the  incorporation by
reference  of our report  included  in this Form  10-K,  into the  Seitel,  Inc.
previously filed Form S-3 Registration Statements File Nos. 33-71968,  33-78554,
33-80574,  33-89890,  and 333-71545,  and Form S-8 Registration  Statements File
Nos. 33-36914, 33-78560, 33-89934, 333-01271, 333-12549 33,63383, and 333-64557.




ARTHUR ANDERSEN LLP


Houston, Texas
March 30, 1999


                                                                    EXHIBIT 23.2



                       FORREST A. GARB & ASSOCIATES, INC.

                              PETROLEUM CONSULTANTS
                    5310 HARVEST HILL ROAD, SUITE 160-LB 152
                            DALLAS, TEXAS 75230-5805
                       TEL: 972.788.1110 FAX: 972.991.3160
                           email: [email protected]

                                 March 30, 1999


                                CONSENT OF EXPERT



Ms. Debra D. Valice
Seitel, Inc.
50 Briar Hollow Lane, 7th Floor West
Houston, Texas 77027

Dear Ms. Valice:

Forrest A. Garb & Associates, Inc., petroleum consultants, hereby consent to the
incorporation by reference in any registration statement or other document filed
with the  Securities  and Exchange  Commission  by Seitel,  Inc., of our reserve
report  dated  January  1,  1999,  and to all  references  to our firm  included
therein.


                                             Forrest A. Garb & Associates, Inc.


                                             By:       /s/ Forrest A. Garb
                                                       -------------------------

                                             Name:     Forrest A. Garb
                                                       -------------------------

                                             Title:    Chairman of the Board
                                                       -------------------------

                                             Dallas, Texas

                                             March 30, 1999


<TABLE> <S> <C>


<ARTICLE>                     5
       
<S>                                      <C>

<PERIOD-TYPE>                                 12-MOS
<FISCAL-YEAR-END>                        DEC-31-1998
<PERIOD-END>                             DEC-31-1998
<CASH>                                         3,161
<SECURITIES>                                       0
<RECEIVABLES>                                 60,761
<ALLOWANCES>                                     936
<INVENTORY>                                        0
<CURRENT-ASSETS>                                   0<F1>
<PP&E>                                       200,813<F2>
<DEPRECIATION>                                49,542
<TOTAL-ASSETS>                               495,767
<CURRENT-LIABILITIES>                              0<F1>
<BONDS>                                      150,690
                              0
                                        0
<COMMON>                                         238
<OTHER-SE>                                   237,349
<TOTAL-LIABILITY-AND-EQUITY>                 495,767
<SALES>                                      144,857
<TOTAL-REVENUES>                             144,857
<CGS>                                          4,874
<TOTAL-COSTS>                                  4,874
<OTHER-EXPENSES>                                   0
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                             5,963
<INCOME-PRETAX>                               37,983
<INCOME-TAX>                                  13,623
<INCOME-CONTINUING>                           24,360
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                    0
<CHANGES>                                          0
<NET-INCOME>                                  24,360
<EPS-PRIMARY>                                   1.07<F3>
<EPS-DILUTED>                                   1.05

<FN>
<F1> The Company does not present a classified balance sheet; therefore, current
     assets and current liabilities are not reflected in the Company's financial
     statement.

<F2> PP&E does not include  seismic data bank assets with a cost of $513,037,000
     and related accumulated amortization of $250,087,000.

<F3> Reflects basic earnings per share.

</FN>
        

</TABLE>


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