DYCO OIL & GAS PROGRAM 1986-X
10-Q, 1997-11-13
DRILLING OIL & GAS WELLS
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                  SECURITIES AND EXCHANGE COMMISSION
                        WASHINGTON, D.C. 20549


                               FORM 10-Q


           Quarterly Report Pursuant to Section 13 or 15(d)
                of the Securities Exchange Act of 1934



     For the quarter ended            Commission File Number
       September 30, 1997                    0-16331


                    DYCO OIL AND GAS PROGRAM 1986-X
                        (A LIMITED PARTNERSHIP)
         (Exact Name of Registrant as specified in its charter)



             Minnesota                      41-1565819
    (State or other jurisdiction   (I.R.S. Employer Identification
         of incorporation or                 Number)              
            organization)  



   Samson Plaza, Two West Second Street, Tulsa, Oklahoma   74103
   -------------------------------------------------------------      
(Address of principal executive offices)           (Zip Code)



                            (918) 583-1791
         ----------------------------------------------------
         (Registrant's telephone number, including area code)


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 
                             ------     ------
<PAGE>
<PAGE>
                    PART I.  FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS

          DYCO OIL AND GAS PROGRAM 1986-X LIMITED PARTNERSHIP
                            BALANCE SHEETS
                              (Unaudited)

                                ASSETS

                                      September 30,  December 31,
                                          1997          1996
                                      -------------  ------------

CURRENT ASSETS:
  Cash and cash equivalents               $ 30,975      $  8,796
  Accounts receivable - General
   Partner (Note 2)                          8,328           -
  Accrued oil and gas sales                 28,238        40,805
                                          --------      --------
     Total current assets                 $ 67,541      $ 49,601

NET OIL AND GAS PROPERTIES, utilizing
  the full cost method                      86,325        70,461

DEFERRED CHARGE                             13,022        13,022
                                          --------      --------
                                          $166,888      $133,084
                                          ========      ========

                   LIABILITIES AND PARTNERS' CAPITAL

CURRENT LIABILITIES:
  Accounts payable                        $  4,423      $  4,269
  Accounts payable - General 
   Partner (Note 2)                            -          25,129
                                          --------      --------
     Total current liabilities            $  4,423      $ 29,398

ACCRUED LIABILITY                            9,142         9,142

PARTNERS' CAPITAL:
  General Partner, issued and
   outstanding, 21 units                     1,532           944
  Limited Partners, issued and
   outstanding, 2,000 units                151,791        93,600
                                          --------      --------
     Total Partners' capital              $153,323      $ 94,544
                                          --------      --------
                                          $166,888      $133,084
                                          ========      ========

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

                                  -2-
<PAGE>
<PAGE>
          DYCO OIL AND GAS PROGRAM 1986-X LIMITED PARTNERSHIP
                       STATEMENTS OF OPERATIONS
        FOR THE THREE MONTHS ENDED SEPTEMBER 30, 1997 AND 1996
                              (Unaudited)


                                          1997          1996
                                        --------      --------

REVENUES:
  Oil and gas sales                      $45,286       $45,133
  Interest                                   436           160
                                         -------       -------
                                         $45,722       $45,293

COST AND EXPENSES:
  Oil and gas production                 $12,002       $15,498
  Depreciation, depletion, and
   amortization of oil and gas
   properties                              4,679         5,322
  General and administrative (Note 2)      4,949         4,699
                                         -------       -------
                                         $21,630       $25,519
                                         -------       -------

NET INCOME                               $24,092       $19,774 
                                         =======       =======
GENERAL PARTNER (1%) - net        
  income                                 $   241       $   198 
                                         =======       =======
LIMITED PARTNERS (99%) - net
  income                                 $23,851       $19,576 
                                         =======       =======
NET INCOME PER UNIT                      $ 11.92       $  9.78 
                                         =======       =======
UNITS OUTSTANDING                          2,021         2,021
                                         =======       =======

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

                                  -3-
<PAGE>
<PAGE>
          DYCO OIL AND GAS PROGRAM 1986-X LIMITED PARTNERSHIP
                       STATEMENTS OF OPERATIONS
         FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1997 AND 1996
                              (Unaudited)


                                          1997          1996
                                        --------      --------

REVENUES:
  Oil and gas sales                     $134,382      $136,227
  Interest                                   794           728
                                        --------      --------
                                        $135,176      $136,955

COST AND EXPENSES:
  Oil and gas production                $ 48,475      $ 46,379
  Depreciation, depletion, and
   amortization of oil and gas
   properties                             10,134        16,523
  General and administrative (Note 2)     17,788        16,958
                                        --------      --------
                                        $ 76,397      $ 79,860
                                        --------      --------

NET INCOME                              $ 58,779      $ 57,095 
                                        ========      ========
GENERAL PARTNER (1%) - net        
  income                                $    588      $    571 
                                        ========      ========
LIMITED PARTNERS (99%) - net
  income                                $ 58,191      $ 56,524 
                                        ========      ========
NET INCOME PER UNIT                     $  29.08      $  28.25 
                                        ========      ========
UNITS OUTSTANDING                          2,021         2,021
                                        ========      ========

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

                                  -4-
<PAGE>
<PAGE>
          DYCO OIL AND GAS PROGRAM 1986-X LIMITED PARTNERSHIP
                       STATEMENTS OF CASH FLOWS
         FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1997 AND 1996
                              (Unaudited)
                                            1997        1996
                                         ---------    ---------
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income                              $58,779      $57,095 
  Adjustments to reconcile net income
   to net cash provided by
   operating activities:
   Depreciation, depletion, and 
     amortization of oil and gas
     properties                            10,134       16,523
   Increase in accounts receivable -
     General Partner                     (  8,328)         -
   (Increase) decrease in accrued oil
     and gas sales                         12,567     (    681)
   Increase (decrease) in accounts 
     payable                                  154     (    469)
   Decrease in accounts payable  -
      General Partner                    ( 25,129)           -
                                          -------      ------- 
   Net cash provided by operating
     activities                           $48,177      $72,468
                                          -------      -------

CASH FLOWS FROM INVESTING ACTIVITIES:
  Proceeds from the sale of oil and
   gas properties                         $ 8,829      $ 4,992
  Additions to oil and gas properties    ( 34,827)         -
                                          -------      -------
   Net cash provided (used) by 
     investing activities                ($25,998)     $ 4,992 
                                          -------      -------

CASH FLOWS FROM FINANCING ACTIVITIES:
  Cash distributions                      $   -       ($50,525)
                                          -------      -------
   Net cash used by financing
     activities                           $   -       ($50,525)
                                          -------      -------

NET INCREASE IN CASH AND CASH
  EQUIVALENTS                             $22,179      $26,935 

CASH AND CASH EQUIVALENTS AT 
  BEGINNING OF PERIOD                       8,796       18,661
                                          -------      -------
CASH AND CASH EQUIVALENTS AT
  END OF PERIOD                           $30,975      $45,596
                                          =======      =======

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

                                  -5-
<PAGE>
<PAGE>
          DYCO OIL AND GAS PROGRAM 1986-X LIMITED PARTNERSHIP
                CONDENSED NOTES TO FINANCIAL STATEMENTS
                          SEPTEMBER 30, 1997
                              (Unaudited)


1.   ACCOUNTING POLICIES
     -------------------

     The  balance  sheet  as  of  September 30,  1997,  statements  of
     operations for the three and nine months ended September 30, 1997
     and 1996, and statements of cash flows for the nine  months ended
     September  30, 1997 and 1996 have been prepared by Dyco Petroleum
     Corporation ("Dyco"), the General Partner of the Dyco Oil and Gas
     Program  1986-X  Limited  Partnership  (the  "Program"),  without
     audit.    In the  opinion  of management  all  adjustments (which
     include only normal  recurring adjustments) necessary  to present
     fairly the financial  position at September 30,  1997, results of
     operations for the three and nine months ended September 30, 1997
     and 1996, and  changes in  cash flows for  the nine months  ended
     September 30, 1997 and 1996 have been made.

     Information  and   footnote  disclosures  normally   included  in
     financial  statements  prepared  in  accordance   with  generally
     accepted accounting principles  have been  condensed or  omitted.
     It  is  suggested  that these  financial  statements  be  read in
     conjunction  with  the  financial  statements  and notes  thereto
     included in the Program's Annual Report on Form 10-K for the year
     ended  December  31, 1996.   The  results  of operations  for the
     period ended September 30, 1997 are not necessarily indicative of
     the results to be expected for the full year.  

     The limited partners' net income  or loss per unit is based  upon
     each $5,000 initial capital contribution.

     OIL AND GAS PROPERTIES
     ----------------------

     Oil  and gas  operations are  accounted for  using the  full cost
     method of  accounting.   All productive and  non-productive costs
     associated  with the acquisition,  exploration and development of
     oil and gas reserves are capitalized.   The Program's calculation
     of depreciation, depletion,  and amortization includes  estimated
     future expenditures to be  incurred in developing proved reserves
     and   estimated  dismantlement  and  abandonment  costs,  net  of
     estimated salvage values.   In the event the unamortized  cost of
     oil  and gas  properties  being amortized  exceeds the  full cost
     ceiling (as  defined by the Securities  and Exchange Commission),
     the excess is charged to expense in  the period during which such
     excess  occurs.    Sales   and  abandonments  of  properties  are
     accounted for as adjustments of capitalized costs with no gain or
     loss  recognized, unless  such  adjustments  would  significantly
     alter the  relationship between capitalized costs  and proved oil
     and gas reserves.

     The provision  for depreciation,  depletion, and  amortization of
     oil  and gas properties is calculated by dividing the oil and gas
     sales dollars  during the  period by  the estimated future  gross
     income from the oil and gas properties and applying the resulting
     rate to the  net remaining costs of  oil and gas properties  that
     have been capitalized, plus estimated future development costs.

                                  -6-
<PAGE>
<PAGE>
2.   TRANSACTIONS WITH RELATED PARTIES
     ---------------------------------

     Under the terms  of the Program's partnership  agreement, Dyco is
     entitled to receive a reimbursement  for all direct expenses  and
     general and administrative,  geological and engineering  expenses
     it incurs  on behalf  of the  Program.  During  the three  months
     ended September  30, 1997 and  1996 such expenses  totaled $4,949
     and $4,699, respectively, of which $4,020 was paid each period to
     Dyco  and its affiliates.  During the nine months ended September
     30,  1997 and  1996 such  expenses  totaled $17,788  and $16,958,
     respectively, of which $12,060  was paid each period to  Dyco and
     its affiliates. 

     Affiliates  of  the  Program  operate certain  of  the  Program's
     properties.   Their  policy  is  to  bill  the  Program  for  all
     customary charges and  cost reimbursements associated with  these
     activities.

     The  Program had  a payable  due to  Dyco as  General Partner  of
     $25,129  at December 31, 1996 included in accounts payable.  This
     payable represented  an advance made  by the General  Partner for
     working  capital needs.   During  the first  quarter of  1997 the
     Program repaid this liability.

     The receivable  from the  General Partner  at September  30, 1997
     represents proceeds  due to the  Program for the sale  of oil and
     gas  properties.   The  receivable  was  collected subsequent  to
     September 30, 1997.

                                  -7-
<PAGE>
<PAGE>
ITEM 2.   MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
          AND RESULTS OF OPERATIONS

USE OF FORWARD-LOOKING STATEMENTS AND ESTIMATES
- -----------------------------------------------

     This   Quarterly   Report   contains    certain   forward-looking
     statements.  The words "anticipate," "believe," "expect," "plan,"
     "intend,"  "estimate,"  "project,"  "could,"  "may,"  and similar
     expressions  are intended to identify forward-looking statements.
     Such statements reflect  management's current views with  respect
     to  future  events and  financial  performance.   This  Quarterly
     Report  also includes certain information,  which is, or is based
     upon, estimates and assumptions.   Such estimates and assumptions
     are management's efforts to  accurately reflect the condition and
     operation of the Program.

     Use of forward-looking  statements and estimates and  assumptions
     involve  risks  and  uncertainties  which include,  but  are  not
     limited to, the volatility of oil and gas prices, the uncertainty
     of reserve  information, the  operating risk associated  with oil
     and gas properties (including the risk of personal injury, death,
     property  damage,  damage to  the  well  or producing  reservoir,
     environmental  contamination,  and  other  operating  risks), the
     prospect of  changing tax  and regulatory laws,  the availability
     and  capacity of  processing and  transportation  facilities, the
     general economic climate, the supply and price of foreign imports
     of oil  and gas, the  level of consumer  product demand,  and the
     price  and availability of alternative fuels.  Should one or more
     of  these risks  or uncertainties  occur  or should  estimates or
     underlying  assumptions prove  incorrect,  actual  conditions  or
     results  may vary  materially  and adversely  from those  stated,
     anticipated, believed, estimated, or otherwise indicated.

LIQUIDITY AND CAPITAL RESOURCES
- -------------------------------

     Net   proceeds  from  the  Program's  operations  less  necessary
     operating  capital are  distributed to  investors on  a quarterly
     basis.   The net proceeds  from production are  not reinvested in
     productive assets, except to the extent that proceeds may be used
     to attempt to either  (i) improve producing wells or  (ii) employ
     methods  to  permit  more  efficient recovery  of  the  Program's
     reserves.   In both of these  instances, it is the  intent of the
     General Partner that the use of proceeds may result in a positive
     economic impact on  the Program.   During the  nine months  ended
     September 30, 1997, the Program invested approximately $28,000 in
     a recompletion  on one well in  order to improve the  recovery of
     reserves.  The recompletion  was unsuccessful.  Subsequently, the
     well was sold  for salvage  value of approximately  $8,300.   The
     unsuccessful  recompletion  expenses  incurred  by   the  Program
     adversely  impacted the  Program's  cash flows  during the  third
     quarter  of 1997.  Management is currently unaware of any pending
     similar expenditures  which,  if unsuccessful,  would  materially
     impact the Program's cash flow.

     The Program's available capital from subscriptions has been spent
     on  oil and  gas drilling  activities.   There should not  be any
     further material capital resource commitments in the future.  The
     Program has  no  bank debt  commitments.   Cash  for  operational
     purposes will be provided by current oil and gas production.

                                  -8-
<PAGE>
<PAGE>
RESULTS OF OPERATIONS
- ---------------------

     GENERAL DISCUSSION

     The following  general discussion  should be read  in conjunction
     with the analysis of  results of operations provided below.   The
     most important  variable affecting the Program's  revenues is the
     prices  received for the sale of oil  and gas.  Predicting future
     prices is very difficult.  Substantially all of the Program's gas
     reserves are being sold in the "spot market".  Prices on the spot
     market  are  subject  to   wide  seasonal  and  regional  pricing
     fluctuations due  to the  highly competitive  nature of the  spot
     market.  In addition, such spot market sales are generally short-
     term  in  nature  and  are   dependent  upon  the  obtaining   of
     transportation  services provided  by pipelines.   Management  is
     unable  to predict  whether future  oil and  gas prices  will (i)
     stabilize, (ii) increase, or (iii) decrease.

     THREE  MONTHS ENDED SEPTEMBER 30,  1997 AS COMPARED  TO THE THREE
     MONTHS ENDED SEPTEMBER 30, 1996.

                                   Three Months Ended September 30,
                                   --------------------------------
                                          1997             1996
                                        -------          -------
      Oil and gas sales                 $45,286          $45,133
      Oil and gas production expenses   $12,002          $15,498
      Barrels produced                       56               88
      Mcf produced                       22,214           21,445
      Average price/Bbl                 $ 17.79          $ 23.19 
      Average price/Mcf                 $  1.99          $  2.01
 
     As shown in  the table above,  total oil and  gas sales  remained
     relatively constant for the three months ended September 30, 1997
     as compared to  the three months ended September 30, 1996.  While
     the volumes of gas  sold increased during the three  months ended
     September  30,  1997  as  compared  to  the  three  months  ended
     September 30, 1996, any  resulting increase in oil and  gas sales
     was offset by a decrease in the volumes of oil sold and decreases
     in the  average prices of oil and gas  sold.  Volumes of oil sold
     decreased 32 barrels, while volumes of gas sold increased 769 Mcf
     for the three months ended September  30, 1997 as compared to the
     three  months  ended September  30, 1996.    Average oil  and gas
     prices  decreased  to  $17.79  per  barrel  and  $1.99  per  Mcf,
     respectively,  for the three months ended September 30, 1997 from
     $23.19 per barrel  and $2.01 per Mcf  for the three  months ended
     September 30, 1996.

     Oil  and  gas  production  expenses  (including  lease  operating
     expenses and  production taxes) decreased $3,496  (22.6%) for the
     three  months ended September 30,  1997 as compared  to the three
     months  ended  September  30,   1996.    This  decrease  resulted
     primarily from (i) a decrease  in general repairs and maintenance
     expenses  incurred  on one  well  during the  three  months ended
     September  30,  1997  as  compared  to  the  three  months  ended
     September 30, 1996 and  (ii) the sale of another  well during the
     three months ended  September 30, 1997.   As a percentage  of oil
     and  gas sales, these expenses  decreased to 26.5%  for the three
     months ended September 30,  1997 from 34.3% for the  three months
     ended September 30, 1996.  This percentage decrease was primarily

                                  -9-
<PAGE>
<PAGE>
     due  to  the dollar  decrease  in  production expenses  discussed
     above.

     Depreciation,  depletion,  and   amortization  of  oil  and   gas
     properties  decreased $643  (12.1%)  for the  three months  ended
     September  30,  1997  as  compared  to  the  three  months  ended
     September 30, 1996.  This decrease resulted primarily from upward
     revisions of previous oil  and gas reserve estimates at  December
     31,  1996.  As  a percentage of  oil and gas  sales, this expense
     decreased  to 10.3% for the three months ended September 30, 1997
     from 11.8% for the three  months ended September 30, 1996.   This
     percentage decrease was  primarily due to the dollar  decrease in
     depreciation, depletion, and amortization discussed above.

     General and administrative expenses increased $250 (5.3%) for the
     three  months ended September 30,  1997 as compared  to the three
     months  ended  September  30,   1996.    This  increase  resulted
     primarily  from increases  in both  computer consulting  fees and
     computer upgrade  expenses, which increases were partially offset
     by decreases in both  legal and postage expense during  the three
     months ended September 30,  1997 as compared to the  three months
     ended September 30, 1996.  As a percentage of oil  and gas sales,
     these  expenses remained  relatively  constant at  10.9% for  the
     three months ended  September 30,  1997 and 10.4%  for the  three
     months ended September 30, 1996.

     NINE  MONTHS ENDED  SEPTEMBER 30,  1997 AS  COMPARED TO  THE NINE
     MONTHS ENDED SEPTEMBER 30, 1996.

                                    Nine Months Ended September 30,
                                    -------------------------------
                                         1997             1996
                                       --------         --------
      Oil and gas sales                $134,382         $136,277
      Oil and gas production expenses  $ 48,475         $ 46,379
      Barrels produced                      210              278
      Mcf produced                       59,899           66,626
      Average price/Bbl                $  20.59         $  19.48 
      Average price/Mcf                $   2.17         $   1.96
 
     As  shown in the  table above, total oil  and gas sales decreased
     $1,845 (1.4%) for  the nine  months ended September  30, 1997  as
     compared  to the nine months  ended September 30,  1996.  Of this
     decrease,  approximately $1,000  and $13,000,  respectively, were
     related  to decreases  in  the  volumes  of  oil  and  gas  sold,
     partially offset by an  increase of approximately $13,000 related
     to an increase in the average price of gas sold.   Volumes of oil
     and  gas sold decreased  68 barrels and  6,727 Mcf, respectively,
     for the nine months ended  September 30, 1997 as compared  to the
     nine  months ended  September  30, 1996.    The decrease  in  the
     volumes of  gas sold resulted  primarily from normal  declines in
     production  due to diminished gas reserves on one well during the
     nine  months ended  September 30,  1997 as  compared to  the nine
     months  ended September  30, 1996.   Average  oil and  gas prices
     increased  to $20.59 per barrel  and $2.17 per Mcf, respectively,
     for  the nine  months ended  September 30,  1997 from  $19.48 per
     barrel and $1.96 per Mcf, respectively, for the nine months ended
     September 30, 1996.

                                 -10-
<PAGE>
<PAGE>
     Oil  and  gas  production  expenses  (including  lease  operating
     expenses and  production taxes)  increased $2,096 (4.5%)  for the
     nine  months ended  September 30,  1997 as  compared to  the nine
     months  ended  September  30,   1996.    This  increase  resulted
     primarily from workover expenses incurred  on one well during the
     nine  months ended  September 30,  1997 in  order to  improve the
     recovery of reserves, partially offset by decreases in volumes of
     oil and  gas sold during the nine months ended September 30, 1997
     as compared  to the nine months  ended September 30, 1996.   As a
     percentage  of  oil and  gas sales,  these expenses  increased to
     36.1% for the nine months ended September 30, 1997 from 34.0% for
     the  nine  months ended  September  30,  1996.   This  percentage
     increase  was primarily  due to  the workover  expenses discussed
     above.

     Depreciation,  depletion,  and  amortization   of  oil  and   gas
     properties  decreased $6,389  (38.7%) for  the nine  months ended
     September 30, 1997 as compared to the nine months ended September
     30,  1996.   This decreased  resulted primarily  from  (i) upward
     revisions of previous  oil and gas reserve  estimates at December
     31,  1996 and (ii)  the decrease in  volumes of oil  and gas sold
     during  the nine months ended  September 30, 1997  as compared to
     the nine months ended September 30, 1996.  As a percentage of oil
     and gas sales, this expense decreased to 7.5% for the nine months
     ended September 30,  1997 from  12.1% for the  nine months  ended
     September  30, 1996.  This percentage  decrease was primarily due
     to the increases in the average prices of oil and gas sold during
     the nine months ended  September 30, 1997 as compared to the nine
     months ended September 30, 1996.

     General  and administrative expenses remained relatively constant
     for the nine months  ended September 30, 1997 as  compared to the
     nine months ended September 30, 1996.  As a percentage of oil and
     gas  sales, these expenses increased to 13.2% for the nine months
     ended September 30,  1997 from  12.4% for the  nine months  ended
     September 30, 1996.   This percentage increase was  primarily due
     to the decrease in oil and gas sales discussed above.

                                 -11-
<PAGE>
<PAGE>
                      PART II:  OTHER INFORMATION


ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

     (a)  Exhibits:

          27.1      Financial   Data   Schedule   containing   summary
                    financial information extracted from the Program's
                    financial  statements as of September 30, 1997 and
                    for  the  nine months  ended  September  30, 1997,
                    filed herewith.

                    All other exhibits are omitted as inapplicable.

     (b)  Reports on Form 8-K

          None.

                                 -12-
<PAGE>
<PAGE>
                              SIGNATURES


Pursuant to the requirements  of the Securities Exchange Act  of 1934,
the Registrant has duly caused this  report to be signed on its behalf
by the undersigned, thereunto duly authorized.


                         DYCO OIL AND GAS PROGRAM 1986-X LIMITED
                         PARTNERSHIP

                              (Registrant)


                              By:  DYCO PETROLEUM CORPORATION

                                   General Partner




Date:  November 13, 1997      By:        /s/Dennis R. Neill
                                 --------------------------------
                                        (Signature)
                                        Dennis R. Neill
                                        President



Date:  November 13, 1997      By:        /s/Patrick M. Hall
                                 --------------------------------
                                        (Signature)
                                        Patrick M. Hall
                                        Chief Financial Officer

                                 -13-
<PAGE>
<PAGE>
                           INDEX TO EXHIBITS
                           -----------------


NUMBER    DESCRIPTION
- ------    -----------

27.1      Financial   Data   Schedule  containing   summary  financial
          information  extracted from  the  Dyco Oil  and Gas  Program
          1986-X  Limited Partnership's  financial  statements  as  of
          September  30, 1997 and for the  nine months ended September
          30, 1997, filed herewith.

          All other exhibits are omitted as inapplicable.
<PAGE>

<TABLE> <S> <C>

<ARTICLE> 5
<CIK> 0000803095
<NAME> DYCO OIL AND GAS PROGRAM 1986-X LIMITED PARTNERSHIP
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                          30,975
<SECURITIES>                                         0
<RECEIVABLES>                                   36,566
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                67,541
<PP&E>                                       9,214,185
<DEPRECIATION>                               9,127,860
<TOTAL-ASSETS>                                 166,888
<CURRENT-LIABILITIES>                            4,423
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                     153,323
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