UNITED MERIDIAN CORP
S-3, 1997-05-30
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>
 
      As filed with the Securities and Exchange Commission on May 30, 1997
                                              Registration No. 333-_____________
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                ------------------
                                    FORM S-3
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                                ------------------
                          UNITED MERIDIAN CORPORATION
             (Exact name of Registrant as specified in its charter)

           DELAWARE                                   75-2160316
 (State or other jurisdiction                      (I.R.S. Employer
 of incorporation or organization)                Identification No.)

                           1201 LOUISIANA, SUITE 1400
                              HOUSTON, TEXAS 77002
                                 (713) 654-9110
  (Address, including zip code, and telephone number, including area code, of
                   Registrant's principal executive offices)

                                 JOHN B. BROCK
                      CHAIRMAN AND CHIEF EXECUTIVE OFFICER
                           1201 LOUISIANA, SUITE 1400
                              HOUSTON, TEXAS 77002
                                 (713) 654-9110
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                                ------------------
  Approximate date of commencement of the proposed sale to the public:  From
time to time after the effective date of this Registration Statement, in
connection with the exercise of the stock options described herein.

  If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [_]

  If any of the securities being registered on this Form are to be offered on a
delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

  If this Form is filed to register additional securities for an offering
pursuant to Rule 426(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]

  If this Form is a post-effective amendment filed pursuant to Rule 462(c) under
the Securities Act, check the following box and list the Securities Act
registration number of the earlier effective registration statement for the same
offering. [_]

  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
                                ------------------
                        CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
===============================================================================================
                                                                      PROPOSED
                                                 PROPOSED MAXIMUM     MAXIMUM        AMOUNT OF
TITLE OF EACH CLASS               AMOUNT TO BE    OFFERING PRICE     AGGREGATE     REGISTRATION
OF SECURITIES TO BE REGISTERED    REGISTERED(2)     PER SHARE      OFFERING PRICE     FEE(3)
- -----------------------------------------------------------------------------------------------
<S>                               <C>            <C>               <C>             <C>
Series A Voting Common Stock,      4,300,000         $35.19         $151,317,000    $45,853.64
  $0.01 par value per share(1)
===============================================================================================
</TABLE>
(1)  Includes associated Preferred Stock Purchase Rights.  Prior to the
     occurrence of certain events, the Preferred Stock Purchase Rights will not
     be evidenced or traded separately from the Series A Voting Common Stock.
(2)  This Registration Statement also covers any additional shares that may
     hereafter become purchasable as a result of the adjustment provisions of
     the Plans (as defined herein).
(3)  Calculated in accordance with Rule 457(c).

  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE
A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT
SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF THE
SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
================================================================================
<PAGE>
 
PROSPECTUS
- ----------

                                4,300,000 SHARES

              [LOGO OF UNITED MERIDIAN CORPORATION APPEARS HERE]

                          UNITED MERIDIAN CORPORATION

                                  COMMON STOCK

                                 _____________

     This prospectus relates to up to 4,300,000 shares of Series A Voting Common
  Stock, par value $0.01 per share ("Common Stock"), of United Meridian
  Corporation (the "Company"), which may, under the terms of the United Meridian
  Corporation 1994 Employee Nonqualified Stock Option Plan (such plan, as
  amended, the "Employee Plan") and the United Meridian Corporation 1994 Outside
  Directors' Nonqualified Stock Option Plan (such plan, as amended, the
  "Directors' Plan" and, together with the Employee Plan, the "Plans"), be
  offered and sold to immediate family members of certain participants
  ("Participants") in the Plans, to family trusts benefitting the immediate
  family members of Participants or to family partnerships composed solely of
  members of a Participant's immediate family, pursuant to nonqualified stock
  options (the "Stock Options") granted to such Participants under the Plans,
  some or all of which may be transferred by Participants to immediate family
  members, family trusts and family partnerships, in accordance with the Plans
  and the grant documents specifying the terms and conditions of such Stock
  Options.  This prospectus also relates to the offer and sale of Common Stock
  pursuant to such Stock Options to the beneficiaries of such immediate family
  members, or the executors, administrators or beneficiaries of their estates,
  or other persons duly authorized by law to administer the estate or assets of
  such persons.

                                 _____________

  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE COMMISSION
  OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF
  THIS PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                                 _____________

  NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATIONS
  OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, AND IF GIVEN OR MADE SUCH
  INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
  AUTHORIZED.  THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A
  SOLICITATION OF AN OFFER TO BUY ANY OF THESE SECURITIES IN ANY JURISDICTION TO
  ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION IN SUCH
  JURISDICTION.

                                 _____________

            THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE.
                                 _____________

                The date of this Prospectus is __________, 1997.
<PAGE>
 
                               TABLE OF CONTENTS
                                        
                                                                           Page
                                                                           ----

AVAILABLE INFORMATION.....................................................   1

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE...........................   1

UNITED MERIDIAN CORPORATION...............................................   2

USE OF PROCEEDS...........................................................   2

DESCRIPTION OF THE PLANS AND THE STOCK OPTIONS............................   2
  The Plans...............................................................   2
    General Information...................................................   2
    Securities to be Offered..............................................   3
    Administration of the Plans...........................................   3
    Persons Who May Participate in the  Plans.............................   3
    Grants of Stock Options...............................................   3
    Amendment.............................................................   3
  The Stock Options.......................................................   4
    General...............................................................   4
    Assignability of Stock Options........................................   4
    Effect of Termination of Relationship.................................   5
    Exercise of Stock Options by Stock Option Transferees.................   6
    Adjustments to Stock Options..........................................   6
    Trading...............................................................   7

TAX AND ERISA STATUS OF OPTIONS...........................................   7
  Federal Income Tax Consequences.........................................   7
    Tax Consequences to Participant Transferors...........................   7
    Tax Consequences to Stock Option Transferee...........................   8
    Tax Consequences Upon Subsequent Sale of Stock
     by Stock Option Transferee...........................................   8
  ERISA...................................................................   8

REOFFERS AND RESALES......................................................   8

EXPERTS...................................................................   8

LEGAL OPINION.............................................................   8
<PAGE>
 
                             AVAILABLE INFORMATION

     The Company is subject to the informational requirements of the Securities
  Exchange Act of 1934, as amended (the "Exchange Act"), and, in accordance
  therewith, files reports and other information with the Securities and
  Exchange Commission (the "Commission").  Copies of such material can be
  obtained by mail from the Public Reference Section of the Commission at
  Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed
  rates.  In addition, such reports, proxy statements and other information
  filed by the Company can be inspected and copied at the public reference
  facilities maintained by the Commission at Room 1024, 450 Fifth Street, N.W.,
  Washington, D.C. 20549, as well as the following Regional Offices of the
  Commission: Midwest Regional Office, 500 West Madison Street, Suite 1400,
  Chicago, Illinois 60661-2551 and Northeast Regional Office, 7 World Trade
  Center, New York, New York 10048.  The Commission maintains a Web site at
  http://www.sec.gov containing reports, proxy statements and other information
  regarding registrants, including the Company, that file electronically with
  the Commission.  Reports, proxy statements and other information concerning
  the Company may also be inspected at the offices of the New York Stock
  Exchange, 20 Broad Street, New York, New York 10005.


                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents filed with the Commission pursuant to the Exchange
  Act are incorporated herein by reference:

     1. The Company's Annual Report on Form 10-K for the fiscal year ended
        December 31, 1996 (the "1996 10-K");
     2. The Company's Quarterly Report on Form 10-Q for the quarter ended 
        March 31, 1997;
     3. The description of the Company's Common Stock contained in the Company's
        Registration Statement on Form 8-A, filed with the Commission on June
        15, 1993; and
     4. The description of the Company's Preferred Stock Purchase Rights
        contained in the Company's Registration Statement on Form 8-A, filed
        with the Commission on February 16, 1996, as amended by Amendment No. 1
        thereto on Form 8-A/A, filed with the Commission on March 4, 1996.

     All documents filed by the Company pursuant to Sections 13(a), 13(e), 14 or
  15(d) of the Exchange Act subsequent to the date hereof and prior to the
  termination of the offering of the securities registered hereunder shall be
  deemed to be incorporated by reference herein and to be part hereof from the
  date of filing of such documents.

     Any statement contained in a document incorporated or deemed to be
  incorporated by reference herein shall be deemed to be modified or superseded
  for purposes hereof to the extent that a statement contained herein or in any
  other subsequently filed document which is also, or is deemed to be,
  incorporated by reference herein modifies or replaces such statement.  Any
  such statement so modified or superseded shall not be deemed, except as so
  modified or superseded, to constitute a part hereof.  The Company will provide
  without charge to each person to whom this Prospectus has been delivered, upon
  the written or oral request of any such person (without exhibits unless such
  exhibits are specifically incorporated by reference into such documents)
  copies of any or all of the documents incorporated by reference in this
  Prospectus.  Requests for such copies may be directed to Secretary, United
  Meridian Corporation, 1201 Louisiana, Suite 1400, Houston, Texas 77002;
  Telephone: (713) 654-9110.


                                       1

<PAGE>
 
                          UNITED MERIDIAN CORPORATION

     United Meridian Corporation ("UMC" or the "Company") is a leading
  independent energy company engaged in the exploration, development, production
  and acquisition of oil and natural gas in North America and certain
  international regions.  Since its inception in 1987, the Company has grown
  through a series of strategic corporate and property acquisitions and a
  successful exploration program that has focused on UMC's core operating areas
  in North America and in certain high potential, international regions.  In
  North America, the Company's production is concentrated in the Gulf Coast,
  Permian Basin, Mid-continent and Rocky Mountain regions and in Western Canada.
  Internationally, the Company currently operates in the West African oil and
  natural gas producing regions of Cote d'Ivoire and Equatorial Guinea.  In
  addition, the Company has been awarded a production sharing contract or
  petroleum concession agreement ("PSC") on one block and has a contractual
  arrangement covering PSCs on two adjacent blocks in Pakistan and has been
  awarded a PSC in Bangladesh.

     The principal executive office of the Company is located at 1201 Louisiana,
  Suite 1400, Houston, Texas 77002; Telephone: (713) 654-9110.


                                USE OF PROCEEDS

     The Company intends to use the net proceeds from the sale of the Common
  Stock offered hereby for general corporate purposes.


                 DESCRIPTION OF THE PLANS AND THE STOCK OPTIONS

  THE PLANS

     A copy of each Plan is filed as an exhibit to the Registration Statement of
  which this Prospectus forms a part. The following summary of certain
  provisions of the Plans does not purport to be complete and is subject to, and
  qualified in its entirety by reference to, all of the provisions of the Plans,
  including the definitions therein of certain terms.

      General Information.  The Plans were adopted by the Board of Directors of
  the Company on March 29, 1994 and were approved by the stockholders of the
  Company on May 17, 1994.  The Employee Plan provides for the grant of Stock
  Options to purchase shares of the Common Stock to employees and officers of
  the Company or any of its Affiliates (as such term is defined in the Internal
  Revenue Code of 1986, as amended (the "Code")).  The Directors' Plan provides
  for the grant of Stock Options to purchase shares of Common Stock to all non-
  employee directors ("Outside Directors") of the Company or any of its
  Affiliates.  The purpose of the Plans is to advance the interests of the
  Company by encouraging stock ownership on the part of key employees and
  Outside Directors, by enabling the Company (and its Affiliates) to secure and
  retain highly qualified employees and Outside Directors and by providing such
  employees and Outside Directors with an additional incentive to advance the
  success of the Company (and its Affiliates).  Stock Options granted under the
  Plans are "nonstatutory stock options" and will not qualify for any special
  tax benefits to the holders of such Stock Options.  The Plans are intended to
  qualify under Rule 16b-3 promulgated under the Exchange Act so that grants of
  Stock Options under the Plans are exempt transactions under Section 16(b) of
  the Exchange Act.

     The Employee Plan will terminate on March 29, 2005 unless terminated at an
  earlier date by the Board of Directors.  The Directors' Plan will terminate
  either on March 29, 2005, or the date as of which there are not sufficient
  shares available under the Directors' Plan to allow for the grant to each
  Outside Director of a Stock Option for the number of shares provided pursuant
  to the Directors' Plan; however, the Board of Directors may terminate the
  Directors' Plan at any time prior thereto.  Termination of the Plans shall not
  affect, without the consent of a person having rights under the Plans, any
  Stock Option theretofore granted under the Plans.


                                       2

<PAGE>
 
     The Plans are not subject to the provisions of the Employee Retirement
  Income Security Act of 1974 ("ERISA") nor qualified under Section 401(a) of
  the Code.

      Securities to be Offered. The maximum number of shares of the Company's
  authorized but unissued Common Stock available for grant under the Employee
  Plan is 4,050,000 shares (subject to adjustment upon certain events as
  hereinafter described) and as of May 28, 1997, 1,133,591 shares were available
  for distribution under the Employee Plan (net of shares reserved for issuance
  upon the exercise of outstanding Stock Options), and unexercised Stock Options
  to purchase 2,054,719 shares of Common Stock were outstanding under the
  Employee Plan. The maximum number of shares of the Company's authorized but
  unissued Common Stock available for grant under the Directors' Plan is 250,000
  shares (subject to adjustment upon certain events as hereinafter described)
  and as of May 28, 1997, 97,000 shares were available for distribution under
  the Directors' Plan (net of shares reserved for issuance upon the exercise of
  outstanding Stock Options), and unexercised Stock Options to purchase 151,000
  shares of Common Stock were outstanding under the Directors' Plan. Shares that
  by reason of the expiration of a Stock Option or otherwise are no longer
  subject to purchase pursuant to a Stock Option granted under the Plans may be
  reoptioned under the Plans.

      Administration of the Plans.  The Plans are administered by the
  Compensation, Management Development and Directors Committee (the "Committee")
  of the Board of Directors of the Company, which consists of not less than
  three non-employee directors (as defined in Rule 16b-3 promulgated under the
  Exchange Act).  The Committee's members are appointed by the Company's Board
  of Directors.  The Board of Directors may, from time to time, remove members
  from or add members to the Committee and shall fill vacancies in the
  Committee, however caused. Subject to the express terms and conditions of the
  Plans, the Committee has full power to grant Stock Options under the Plans, to
  construe and interpret the Plans, to prescribe, amend and rescind rules and
  regulations relating to the Plans and to make all other determinations
  necessary or advisable for the administration of the Plans.  The current
  members of the Committee are Elvis L. Mason, who chairs the Committee, Charles
  R. Carson, Robert H. Dedman, David K. Newbigging, Matthew R. Simmons and
  Donald D. Wolf, none of whom is employed by the Company.

      Persons Who May Participate in the Plans.  The Employee Plan provides for
  grants of Stock Options to all directors who are employees of the Company and
  to all officers and other employees of the Company or any parent or
  subsidiary.  The Directors' Plan provides for grants of Stock Options to all
  directors of the Company who are not employees of the Company or any parent or
  subsidiary of the Company.

      Grants of Stock Options.  Stock Options granted from time to time pursuant
  to the Plans shall be evidenced by written agreements ("Nonqualified Stock
  Option Agreements"), and shall not be inconsistent with the Plans.  Under the
  terms of the Employee Plan, the Committee may grant Stock Options from time to
  time to directors who are employees of the Company and to all officers and
  other employees of the Company (or its Affiliates) as the Committee shall, in
  its discretion, determine.  The Directors' Plan provides that each Outside
  Director who is elected or appointed to the Board of Directors of the Company
  for the first time after March 29, 1994, shall be granted and receive, as of
  the date of his or her election or appointment and without the exercise of the
  discretion of any person or persons, a Stock Option to purchase 3,000 shares
  of Common Stock ("Option Shares") upon proper exercise of such Stock Option
  (subject to adjustment as described below under "The Stock Options --
  Adjustments to Stock Options").  As of the date of the annual meeting of the
  stockholders of the Company in each year that the Directors' Plan is in
  effect, each Outside Director who is in office immediately after such meeting
  and who is not then entitled to receive a Stock Option pursuant to the
  preceding conditions shall be granted and receive, without the exercise of the
  discretion of any person or persons, a Stock Option to purchase 3,000 Option
  Shares (subject to adjustment as described below under "The Stock Options --
  Adjustments to Stock Options").  If, as of any date that the Directors' Plan
  is in effect, there are not sufficient Option Shares available under the
  Directors' Plan to allow for the grant to each Outside Director of a Stock
  Option for the number of shares provided thereunder, the Directors' Plan shall
  terminate according to its provisions.

      Amendment.  The Board of Directors of the Company may, from time to time,
  alter, amend, suspend or discontinue the Plans, or alter or amend any and all
  Nonqualified Stock Option Agreements granted thereunder; provided, however,
  that no such action of the Board of Directors, without the approval of the
  stockholders of the Company, may alter the provisions of the Plans so as to
  (i) materially increase the benefits accruing to Participants under the Plans,
  (ii) materially increase the number of shares of Common Stock subject to the
  Plans, (iii) modify the


                                       3

<PAGE>
 
  requirements as to the eligibility for participation in the Plans, (iv) extend
  the term of the Plans or the maximum term of the Stock Options granted, (v)
  alter any outstanding Nonqualified Stock Option Agreement to the detriment of
  the Participant or Stock Option Transferee (as defined below), without such
  Participant or Stock Option Transferee's consent, or (vi) decrease, directly
  or indirectly (by cancellation and substitution of options or otherwise), the
  option price applicable to any Stock Option granted under the Plans.  Copies
  of the Plans and additional information about the Plans and the administrators
  may be obtained from Secretary, United Meridian Corporation, 1201 Louisiana,
  Suite 1400, Houston, Texas 77002; Telephone: (713) 654-9110.

  THE STOCK OPTIONS

      General.  As stated above, the Plans provide for the grant of Stock
  Options to purchase shares of Common Stock. At the time of grant, the
  Committee establishes the exercise price, which, under the Employee Plan,
  shall be no less than the market value of the Common Stock on the date the
  Stock Option is granted (the "Date of Grant"); provided, however, that in
  connection with a merger, consolidation or reorganization of the Company or
  any of its affiliates, the Committee may grant Stock Options under the
  Employee Plan at an option price per share less than the market value of the
  Common Stock on the Date of Grant if such Stock Options are granted under the
  Employee Plan in exchange for, or upon conversion of, options to purchase
  capital stock of any other entity which is a party to such merger,
  consolidation or reorganization and such option price is no less than the
  exercise price of the Stock Options which are to be exchanged or converted
  (after giving effect to any adjustment to such exercise price effected in
  accordance with the plan of merger, consolidation or reorganization).  Under
  the Directors' Plan, the exercise price shall be the market value of the
  Common Stock on the Date of Grant.  For purposes of the Plans, the "market
  value" of each share of Common Stock means (i) if the Common Stock is listed
  on a national securities exchange, the closing sale price per share on the
  principal exchange on which the Common Stock is listed as reported by such
  exchange, (ii) if the Common Stock is quoted in the National Market System,
  the closing sale price per share as reported by NASDAQ, (iii) if the Common
  Stock is traded in the over-the-counter market but not quoted in the National
  Market System, the average of the closing bid and asked quotations per share
  as reported by NASDAQ, or any other nationally accepted reporting medium if
  NASDAQ quotations shall be unavailable, or (iv) if none of the foregoing
  applies, the market value of the Common Stock will be the fair value of the
  Common Stock as reasonably determined in the good faith judgment of the
  Company's Board of Directors.  In addition, the Committee determines the
  expiration date, which may not be more than 11 years from the Date of Grant,
  and the times and installments in which the Stock Options may be exercised.

     Except as otherwise provided in the applicable Nonqualified Stock Option
  Agreement, each Stock Option granted under the Employee Plan shall be
  exercisable as to 25% of the total shares covered by such Stock Option as of
  the second anniversary of the Date of Grant, and the right to exercise with
  respect to an additional 25% of the total shares shall accrue on each of the
  three subsequent anniversaries of the Date of Grant and shall be cumulative.
  Except as otherwise provided in the applicable Nonqualified Stock Option
  Agreement, the right to exercise each Stock Option granted under the
  Directors' Plan shall accrue as to 33-1/3% of the total shares covered by such
  Stock Option on the first three anniversaries of the Date of Grant and shall
  be cumulative.

      Assignability of Stock Options.  Stock Options granted under the Plans may
  be transferred by the Participant (the "Participant Transferor") to one or
  more permitted transferees (the "Stock Option Transferees"); provided that (i)
  there may be no consideration for such transfer, (ii) the Participant
  Transferor (or such Participant Transferor's estate or representative) shall
  remain obligated to satisfy all employment tax and other withholding tax
  obligations associated with the exercise of the Stock Options, (iii) the
  Participant Transferor shall notify the Company in writing that such transfer
  has occurred, the identity and address of the Stock Option Transferee and the
  relationship of the Stock Option Transferee to the Participant Transferor and
  (iv) such transfer shall be effected pursuant to transfer documents approved
  from time to time by the Committee.  The term "permitted transferees" shall
  mean one or more the following:  (i) any member of the Participant's immediate
  family; (ii) a trust established for the exclusive benefit of one or more
  members of such immediate family; or (iii) a partnership in which such
  immediate family members are the only partners.  The term "immediate family"
  is defined for such purpose as spouses, children, stepchildren and
  grandchildren, including relationships arising from adoption.

     To the extent a transferred Stock Option is not fully exercisable as of the
  date of transfer thereof, the Participant Transferor shall specify in the
  transfer document whether and to what extent the transferred Stock Options (if
  less than


                                       4

<PAGE>
 
  all of the Stock Options subject to the applicable Nonqualified Stock Option
  Agreement) are exercisable, subject to the limitations on exercisability
  contained in the applicable Nonqualified Stock Option Agreement.  Furthermore,
  to the extent the Participant Transferor transfers Stock Options that are not
  exercisable as of the date of transfer and such Stock Options are less than
  all of the Stock Options subject to the applicable Nonqualified Stock Option
  Agreement, the Participant Transferor shall specify in the transfer documents,
  subject to the limitations on exercisability contained in the applicable
  Nonqualified Stock Option Agreement, when the transferred Stock Options become
  exercisable as Stock Options under the applicable Nonqualified Stock Option
  Agreement generally become exercisable subsequent to such transfer.  Stock
  Option Transferees may not further assign or transfer transferred Stock
  Options other than by will or the laws of descent and distribution.  Following
  any permitted transfer, any such Stock Options shall continue to be subject to
  the same terms and conditions as were applicable immediately prior to transfer
  and continue to be subject to the termination of relationship provisions of
  the Plans, as more fully described below.

     THIS PROSPECTUS RELATES TO UP TO 4,300,000 SHARES OF COMMON STOCK OF THE
  COMPANY WHICH MAY BE OFFERED AND SOLD TO IMMEDIATE FAMILY MEMBERS OF
  PARTICIPANTS, TO FAMILY TRUSTS OR FAMILY PARTNERSHIPS PURSUANT TO STOCK
  OPTIONS THAT MAY BE TRANSFERRED TO SUCH IMMEDIATE FAMILY MEMBERS, FAMILY
  TRUSTS OR FAMILY PARTNERSHIPS, AS DESCRIBED IN THE IMMEDIATELY PRECEDING
  PARAGRAPH.  THIS PROSPECTUS ALSO RELATES TO THE OFFER AND SALE OF COMMON STOCK
  PURSUANT TO SUCH STOCK OPTIONS TO THE BENEFICIARIES OF SUCH IMMEDIATE FAMILY
  MEMBERS, OR THE EXECUTORS, ADMINISTRATORS OR BENEFICIARIES OF THEIR ESTATES,
  OR OTHER PERSONS DULY AUTHORIZED BY LAW TO ADMINISTER THE ESTATE OR ASSETS OF
  SUCH PERSONS.

     Upon transfer to a Stock Option Transferee, a Stock Option continues to be
  governed by and subject to the terms and limitations of the Plans and the
  relevant Nonqualified Stock Option Agreement, and the Stock Option Transferee
  is entitled to the same rights as the Participant Transferor thereunder, as if
  no transfer had taken place.  Accordingly, the rights of the Stock Option
  Transferee are subject to the terms and limitations of the original grant to
  the Participant Transferor, including provisions relating to expiration date,
  exercisability, exercise price and forfeiture.  For information regarding the
  terms of a particular Stock Option grant, Stock Option Transferees may contact
  Secretary, United Meridian Corporation, 1201 Louisiana, Suite 1400, Houston,
  Texas 77002; Telephone: (713) 654-9110.

      Effect of Termination of Relationship.  Because Stock Options transferred
  to Stock Option Transferees continue to be governed by the terms of the Plans
  and the original grant, their exercisability continues to be affected by the
  Participant Transferor's relationship to the Company.

     In the event that a Participant who is employed by the Company (or any
  parent or subsidiary of the Company) dies or otherwise terminates his or her
  relationship with the Company (or any parent or subsidiary of the Company)
  because he or she becomes disabled, a Stock Option granted under the Employee
  Plan shall continue to vest in accordance with the Employee Plan for a period
  of twelve months after the Participant's death or the date the Participant's
  relationship with the Company is terminated due to disability. The holder of
  such Stock Option, whether the Participant or such Participant's Stock Option
  Transferee (collectively, "Optionee"), or such persons's estate or beneficiary
  shall have the right to exercise the Stock Option at any time within such
  twelve month period (if otherwise within the term of the Stock Option).  In
  the event the Participant retires from service to the Company, any parent and
  all subsidiaries of the Company, such Stock Option shall continue to vest
  during the lifetime of the Participant and may be exercised during
  Participant's lifetime (if otherwise during the option period).  If a
  Participant has retired and dies subsequent to his or her retirement during
  the term of the Stock Option, such Stock Option shall continue to vest and may
  be exercised within twelve months of the Participant's death (if otherwise
  within the option period). The foregoing provisions are subject to certain
  other provisions of the Employee Plan, which may earlier terminate the Stock
  Option.  In the event that the Participant's relationship with the Company,
  any parent and all subsidiaries of the Company is terminated and the above
  discussion does not apply, Optionee (or its estate or beneficiary) may
  exercise the Stock Option, to the extent the Participant was entitled to
  exercise the Stock Option immediately prior to the termination, within ninety
  days (or such greater period as the Committee may determine) after the date of
  such termination (if otherwise within the option period).  The Committee may
  accelerate the time at which a Stock Option may be exercised.

     In the event that an Outside Director dies or becomes disabled before he or
  she ceases to be a director of the Company, a Stock Option granted under the
  Directors' Plan shall continue to vest in accordance with the Directors'


                                       5

<PAGE>
 
  Plan for a period of twelve months after Participant's death or the date the
  Participant ceases to be a director of the Company due to disability.  The
  Optionee, or such Optionee's estate or beneficiary shall have the right to
  exercise the Stock Option at any time within such twelve month period (if
  otherwise within the term of the Stock Option).  In the event the Participant
  retires from service as a director of the Company, such Stock Option shall
  continue to vest during the lifetime of the Participant and may be exercised
  during the Participant's lifetime (if otherwise during the option period).  If
  a Participant has retired and dies subsequent to his or her retirement during
  the term of the Stock Option, such Stock Option shall continue to vest and may
  be exercised within twelve months of the Participant's death (if otherwise
  within the option period).  The foregoing provisions are subject to certain
  other provisions of the Directors' Plan, which may earlier terminate the Stock
  Option.  In the event that the Participant ceases to be a director of the
  Company, and the above discussion does not apply, Optionee (or its estate or
  beneficiary) may exercise the Stock Option, to the extent the Participant was
  entitled to exercise the Stock Option immediately prior to the cessation,
  within ninety days after the date of such cessation (if otherwise within the
  option period).  The Committee may accelerate the time at which a Stock Option
  may be exercised.

      Exercise of Stock Options by Stock Option Transferees.  A Stock Option may
  be exercised by a Stock Option Transferee, following a proper transfer, at any
  time from the time first set by the Committee in the original grant to the
  Participant Transferor in accordance with the provisions of the Plans.

     Option Shares purchased upon exercise of Stock Options shall at the time of
  purchase be paid for in full.  The Company shall satisfy its employment tax
  and other tax withholding obligations by requiring the Participant (or his or
  her estate or representative) to pay the amount of employment tax and
  withholding tax, if any, that must be paid under federal, state and local law
  due to the exercise of the Stock Option.  To the extent that the right to
  purchase Option Shares has accrued under the Plans, Stock Options may be
  exercised from time to time by written notice to the Company stating the full
  number of Option Shares with respect to which the Stock Option is being
  exercised and the time of delivery thereof, which shall be at least 15 days
  after the giving of such notice unless an earlier date shall have been
  mutually agreed upon by the Stock Option Transferee (or other person entitled
  to exercise the Stock Option) and the Company, accompanied by payment to the
  Company of the purchase price in full and the amount of employment tax and
  withholding tax due, if any, upon the exercise of the Stock Option.  Such
  payment shall be effected by (i) certified or official bank check, (ii) the
  delivery of a number of shares of Common Stock (plus cash if necessary) having
  a fair market value equal to the amount of such purchase price and employment
  or withholding tax (subject to such restrictions or procedures as the Company
  deems necessary to satisfy Section 16(b) of the Exchange Act) or (iii)
  delivery of the equivalent thereof acceptable to the Company.  The Company
  will, as soon as reasonably possible, notify the Participant (or his or her
  representative) of the amount of employment tax and other withholding tax that
  must be paid under federal, state and local law due to the exercise of the
  Stock Option.  At the time of delivery, the Company shall, without transfer or
  issue tax to the Stock Option Transferee (or other person entitled to exercise
  the Stock Option), deliver to the Stock Option Transferee (or to such other
  person) at the principal office of the Company, or such other place as shall
  be mutually agreed upon, a certificate or certificates for the Option Shares,
  provided, however, that the time of delivery may be postponed by the Company
  for such period as may be required for it with reasonable diligence to comply
  with any requirements of law.

      Adjustments to Stock Options.  The aggregate number of shares of Common
  Stock for which Stock Options may be granted to Participants, the number of
  shares covered by each outstanding Stock Option and the exercise price per
  share for each such Stock Option shall be proportionately adjusted for any
  increase or decrease in the number of issued shares of Common Stock of the
  Company resulting from the subdivision or consolidation of shares after the
  Date of Grant, the payment of a stock dividend in shares of Common Stock after
  the Date of Grant or other increase in the shares of outstanding Common Stock
  effected after the Date of Grant without receipt of consideration by the
  Company, provided, however, that any Stock Options to purchase fractional
  shares resulting from any such adjustment shall be eliminated.

     If the Company shall at any time participate in a reorganization to which
  Section 424(a) of the Code applies and (i) the Company is not the surviving
  entity or (ii) the Company is the surviving entity and the stockholders of
  Common Stock are required to exchange their shares for property and/or
  securities, the Company shall give each holder of Stock Options written notice
  of such fact on or before 15 days before such reorganization, and each such
  Stock Option shall be exercisable in full after receipt of such notice and
  prior to such reorganization; however, Stock Options not exercised prior to
  such reorganization shall expire on the occurrence of such reorganization.  A
  sale of all or


                                       6

<PAGE>
 
  substantially all the assets of the Company for a consideration (apart from
  the assumption of obligations) consisting primarily of securities shall be
  deemed a reorganization for the foregoing purposes.  Notwithstanding the
  foregoing, the provisions of the Plans relating to the Company's
  reorganization are subject to the term of the Stock Options as set forth in
  the Plans.

     In the event of the proposed dissolution or liquidation of the Company, the
  Stock Options granted under the Plans shall terminate as of the date to be
  fixed by the Committee (as provided in the Plans), provided that not less than
  30 days' prior written notice of the date so fixed shall be given to the
  holder of such Stock Options and such holder shall have the right, during the
  period of 30 days preceding such termination, to exercise the Stock Options.
  Notwithstanding the foregoing, this provision of the Plans shall be subject to
  the term of the Stock Options and shall be subject to adjustments upon
  reorganization of the Company if the holder of the Stock Options receives
  notice of such reorganization at a time earlier than the notice provided for
  above.

      Trading.  The Common Stock received pursuant to the Plans must be traded
  on and in compliance with all the applicable laws of the New York Stock
  Exchange, Inc.


                        TAX AND ERISA STATUS OF OPTIONS

  FEDERAL INCOME TAX CONSEQUENCES

     The summary set forth below is based upon an interpretation of present
  federal income tax laws and regulations as of the date hereof.  This summary
  is not intended to cover all aspects of federal tax law (such as federal
  estate and gift tax law) or any state or local tax law that may be applicable
  to the Plans.  Participants and Stock Option Transferees are urged to consult
  with their own tax advisors to determine the tax consequences that would
  pertain to such person's particular circumstances.

     The Stock Options granted pursuant to the Plans are not intended to qualify
  as "incentive stock options" within the meaning of Section 422 of the Code,
  and the terms of the Plans and Stock Options granted thereunder shall be so
  construed.

      Tax Consequences to Participant Transferors.  The Company is of the
  opinion that a Participant who transfers a nonqualified stock option ("NSO")
  to a permitted transferee will not recognize income at the time of the
  transfer. Instead, the Participant Transferor will recognize ordinary
  compensation income at such time that the Stock Option Transferee exercises
  the NSO (to the extent that the Option Shares received are transferable or not
  subject to a substantial risk of forfeiture) in an amount equal to the excess
  of the fair market value of the Option Shares on the date of exercise over the
  amount paid for such NSO by the Participant Transferor. Moreover, such income
  will be subject to certain withholding taxes.  Participant Transferors may
  satisfy the withholding obligation by writing a check to the Company or by
  another method permitted by the Company.  Subject to certain limitations, the
  Company will generally be entitled to claim a Federal income tax deduction at
  such time and in the same amount that the Participant Transferor realizes
  ordinary income.  In the event the Stock Option Transferee exercises the NSO
  after the death of the Participant Transferor, any such ordinary income will
  be recognized by the estate of the Participant Transferor.


                                       7

<PAGE>
 
      Tax Consequences to Stock Option Transferee.  A Stock Option Transferee
  will not recognize income at the time of the transfer of the NSO since a gift
  is specifically excluded from gross income.  As described in the preceding
  paragraph, the Participant Transferor and not the Stock Option Transferee will
  recognize ordinary compensation income at the time the Stock Option Transferee
  exercises the NSO.  A Stock Option Transferee who chooses to exercise an NSO
  in whole or in part by delivery of other Common Stock already owned by the
  Stock Option Transferee should consult with their own tax counsel concerning
  the tax consequences of such a transaction.

      Tax Consequences Upon Subsequent Sale of Stock by Stock Option Transferee.
  If Option Shares acquired upon exercise of an NSO by a Stock Option Transferee
  are later sold or exchanged, then the difference between (i) the sum of the
  cash and fair market value of the property received and (ii) the Stock Option
  Transferee's adjusted tax basis in the Option Shares will be taxable as long-
  term or short-term capital gain or loss (if the stock is a capital asset of
  the taxpayer) generally depending upon whether the stock has been held for
  more than one year after the exercise date. The Stock Option Transferee's
  adjusted tax basis in such Option Shares will generally be equal to the fair
  market value of such Option Shares at the time of exercise (if such Option
  Shares are transferable or not subject to a substantial risk of forfeiture at
  such time), which shall include the exercise price of the NSO plus the amount
  of income recognized by the Participant Transferor (or his or her estate) at
  the time of exercise.  Different basis rules will apply if the Stock Option
  Transferee delivered Common Stock in payment of all or a portion of the
  exercise price of the NSO.

  ERISA

     The Plans and the Stock Options described herein are not subject to the
  provisions of ERISA.  The Plans are not qualified under Section 401(a) of the
  Code.

                              REOFFERS AND RESALES

     "AFFILIATES" OF THE COMPANY WITHIN THE MEANING OF RULE 405 OF THE
  SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") MAY REOFFER OR
  RESELL SHARES OF COMMON STOCK ACQUIRED BY THEM THROUGH THE EXERCISE OF STOCK
  OPTIONS DESCRIBED HEREIN PURSUANT TO EITHER RULE 144 PROMULGATED UNDER THE
  SECURITIES ACT OR AN EFFECTIVE REOFFER PROSPECTUS IN ACCORDANCE WITH THE RULES
  AND REGULATIONS OF THE SECURITIES ACT.  SUCH RULES REQUIRE THAT THE AFFILIATE
  DESIRING TO REOFFER OR RESELL SUCH SECURITIES BE NAMED IN THE REOFFER
  PROSPECTUS AND STATE THE NUMBER OF SHARES HE OR SHE DESIRES TO REGISTER
  THEREUNDER.  "AFFILIATES" ARE GENERALLY DEFINED TO BE PERSONS WHO, DIRECTLY OR
  INDIRECTLY, CONTROL THE MANAGEMENT AND POLICIES OF THE COMPANY OR ARE
  CONTROLLED BY OR UNDER COMMON CONTROL WITH THE COMPANY OR OTHER AFFILIATES.
  SUCH PERSONS GENERALLY INCLUDE ALL EXECUTIVE OFFICERS, DIRECTORS AND THEIR
  ASSOCIATES.

                                    EXPERTS

     The consolidated financial statements of the Company and its subsidiaries
  included or incorporated by reference in the Company's 1996 10-K, and
  incorporated by reference in this Prospectus, have been audited by Arthur
  Andersen LLP, independent public accountants, as indicated in their report
  with respect thereto, and are incorporated herein by reference in reliance
  upon the authority of said firm as experts in accounting and auditing in
  giving said report. Reference is made to said report, which includes an
  explanatory paragraph with respect to the change in the method of calculating
  impairment of long-lived assets as discussed in Note 3 to the consolidated
  financial statements.

                                 LEGAL OPINION

            The legality of the shares of Common Stock offered hereby has been
  passed upon by Akin, Gump, Strauss, Hauer & Feld, L.L.P., counsel for the
  Company.  In addition, Akin, Gump, Strauss, Hauer & Feld, L.L.P. has advised
  the Company concerning certain Federal income tax consequences related to
  Stock Options under the Plans and the transfer and exercise thereof.


                                       8

<PAGE>
 
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS


  ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The following table sets forth all expenses in connection with the issuance
  and distribution of the securities being registered.  All the amounts shown
  are estimates, except the registration fee.

         Registration fee.............................. $45,853.64
         Fees and expenses of accountants..............   1,000.00
         Fees and expenses of counsel..................   3,000.00
         Blue Sky fees and expenses....................   1,000.00
         Printing expenses.............................          -
         Miscellaneous.................................          -
                                                        ----------
         Total......................................... $50,853.64
                                                        ==========


  ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

       Section 145 of the General Corporation Law of the State of Delaware, as
  amended (the "DGCL"), provides that under certain circumstances a corporation
  may indemnify any person who was or is a party or is threatened to be made a
  party to any threatened, pending or completed action, suit or proceeding
  whether civil, criminal, administrative or investigative, by reason of the
  fact that he is or was a director, officer, employee or agent of the Company
  or is or was serving at its request in such capacity in another corporation or
  business association, against expenses (including attorneys' fees), judgments,
  fines and amounts paid in settlement actually and reasonably incurred by him
  in connection with such action, suit or proceeding if he acted in good faith
  and in a manner he reasonably believed to be in or not opposed to the best
  interests of the Company and, with respect to any criminal action or
  proceeding, had no reasonable cause to believe his conduct was unlawful.
  Section 145 also allows a corporation to purchase and maintain insurance on
  behalf of any such person against any liability asserted against him in any
  such capacity, or arising out of his status as such, whether or not the
  corporation would have the power to indemnify him against such liability under
  the provisions of Section 145.  In addition, Section 145 provides that
  indemnification pursuant to its provisions is not exclusive of other rights of
  indemnification to which a person may be entitled under any bylaw, agreement,
  vote of stockholders or disinterested directors, or otherwise.

       Article 11 of the Company's Certificate of Incorporation, as amended (the
  "Certificate"), provides that the Company shall indemnify any person who was
  or is a party or is threatened to be made a party to any threatened, pending
  or completed action, suit or proceeding, whether civil, criminal,
  administrative or investigative (whether or not by or in the right of the
  Company), by reason of the fact that he is or was a director, officer,
  employee or agent of the Company, or is or was serving at the request of the
  Company as a director, officer, employee or agent of another corporation,
  partnership, joint venture, trust or other enterprise, against expenses
  (including attorneys' fees), liability, loss, judgments, fines and amounts
  paid in settlement actually and reasonably incurred by him in connection with
  such action, suit or proceeding to the fullest extent permitted by any
  applicable law, and such indemnity shall inure to the benefit of the heirs,
  executors and administrators of any such person so indemnified pursuant to
  Article 11 of the Certificate.  In addition, the Company has, pursuant to
  Section 102(b)(7) of the DGCL, provided in Article 10 of its Certificate that,
  to the fullest extent permitted by applicable law, a director of the Company
  shall not be liable to the Company or its stockholders for monetary damages
  for breach of his fiduciary duties as a director.

       The right to indemnification under Article 11 of the Certificate is a
  contract right which includes, with respect to directors and officers, the
  right to be paid by the Company the expenses incurred in defending any such
  proceeding in advance of its disposition; provided, however, that, if the DGCL
  requires, the payment of such expenses incurred by a director or officer in
  advance of the final disposition of a proceeding shall be made only upon
  delivery to the Company of an undertaking, by or on behalf of such director or
  officer, to repay all amounts so advanced if it shall ultimately be determined
  that such director or officer is not entitled to be indemnified under Article
  11 of the

                                      II-1
<PAGE>
 
  Certificate or otherwise.  The Company may, by action of its Board of
  Directors, pay such expenses incurred by employees and agents of the Company
  upon such terms as the Board of Directors deems appropriate.

       Section 8.14 of the Company's Bylaws provides that the Company shall have
  the power and obligation to indemnify any person who was or is a director,
  officer, employee or agent of the Company, or was or is serving at the request
  of the Company as a director, officer, employee or agent of another
  corporation, partnership, joint venture, trust or other enterprise, to the
  extent set forth in the Certificate.  Section 8.15 of the Company's Bylaws
  provides for the authority to purchase insurance with respect to
  indemnification of directors and officers.

       Furthermore, individual Indemnification Agreements have been entered into
  between the Company and each director of the Company that contractually
  obligate the Company to provide to the directors (i) indemnification; (ii)
  insurance or self-insurance in lieu thereof; and (iii) additional
  indemnification.


  ITEM 16.  EXHIBITS.

     3.1    Certificate of Incorporation of the Company, as amended,
            incorporated by reference to Exhibit 3.1 to UMC's 1995 Form 10-K
            filed with the Securities and Exchange Commission on March 7, 1996.

     3.2    By-laws of the Company, as amended, incorporated by reference to
            Exhibit 3.2 to UMC's Form S-8 (No. 333-28017) filed with the
            Securities and Exchange Commission on May 29, 1997.

     4.1    Specimen of certificate representing Series A Voting Common Stock,
            par value $.01 per share, of the Company, incorporated by reference
            to Exhibit 4.13 to UMC's Form 10-Q for the period ended June 30,
            1994 filed with the Securities and Exchange Commission on August 10,
            1994.

     4.2    Rights Agreement by and between United Meridian Corporation and
            Chemical Mellon Shareholder Services, L.L.C., as Rights Agent, dated
            as of February 13, 1996, incorporated by reference as Exhibit 1 to
            Form 8-K, filed with the Securities and Exchange Commission on
            February 14, 1996.

     4.3    UMC 1994 Nonqualified Employee Stock Option Plan incorporated herein
            by reference to Exhibit 4.14 to the Company's Form S-8 (No. 33-
            79160) filed with the Securities and Exchange Commission on May 19,
            1994.

     4.4    First Amendment to the UMC 1994 Employee Nonqualified Stock Option
            Plan dated November 16, 1994, incorporated herein by reference to
            Exhibit 4.11.1 to the Company's Form S-8 (No. 33-86480) filed with
            the Securities and Exchange Commission on November 18, 1994.

     4.5    Second Amendment to the UMC 1994 Employee Nonqualified Stock Option
            Plan dated May 22, 1996, incorporated herein by reference to Exhibit
            4.3.2 to the Company's Form S-8 (No. 333-05401) filed with the
            Securities and Exchange Commission on June 6, 1996.

     4.6    Third Amendment to the UMC 1994 Employee Nonqualified Stock Option
            Plan dated November 13, 1996, incorporated herein by reference to
            Exhibit 4.3.3 to the Company's Form S-8 (No. 333-28017) filed with
            the Securities and Exchange Commission on May 29, 1997.

     4.7    Fourth Amendment to the UMC 1994 Employee Nonqualified Stock Option
            Plan dated May 21, 1997, incorporated herein by reference to Exhibit
            4.3.4 to the Company's Form S-8 (No. 333-28017) filed with the
            Securities and Exchange Commission on May 29, 1997.

     4.8    UMC 1994 Outside Directors' Nonqualified Stock Option Plan,
            incorporated herein by reference to Exhibit 4.15 to the Company's
            Form S-8 (No. 33-79160) filed with the Securities and Exchange
            Commission on May 19, 1994.

                                      II-2
<PAGE>
 
     4.9    First Amendment to the UMC 1994 Outside Directors' Nonqualified
            Stock Option Plan dated May 22, 1996, incorporated herein by
            reference to Exhibit 4.4.1 to the Company's Form S-8 (No. 333-05401)
            filed with the Securities and Exchange Commission on June 6, 1996.

     4.10   Second Amendment to the UMC 1994 Outside Directors' Nonqualified
            Stock Option Plan dated November 13, 1996, incorporated herein by
            reference to Exhibit 4.4 to the Company's Form S-8 (No. 333-28017)
            filed with the Securities and Exchange Commission on May 29, 1997.

    *5      Opinion and Consent of Akin, Gump, Strauss, Hauer & Feld, L.L.P.

   *23.1    Consent of Arthur Andersen LLP.

   *23.2    Consent of Akin, Gump, Strauss, Hauer & Feld, L.L.P. (included in
            its opinion filed as Exhibit 5 hereto).

   *23.3    Consent of Netherland, Sewell & Associates, Inc.

   *23.4    Consent of McDaniel & Associates Consultants, Ltd.

   *23.5    Consent of Ryder Scott Company.

   *24      Power of Attorney (included on signature page of this Registration
            Statement).

  * Filed herewith.


  ITEM 17.  UNDERTAKINGS.

       The undersigned registrant hereby undertakes:

       (a)  (1)   To file, during any period in which offers or sales are being
  made, a post-effective amendment to this registration statement:

            (i) To include any prospectus required by Section 10(a)(3) of the
       Securities Act of 1933;

            (ii) To reflect in the prospectus any facts or events arising after
       the effective date of the registration statement (or the most recent
       post-effective amendment thereof) which, individually or in the
       aggregate, represent a fundamental change in the information set forth in
       the registration statement;

            (iii) To include any material information with respect to the plan
       of distribution not previously disclosed in the registration statement or
       any material change to such information in the registration statement;

  provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if
  the registration statement is on Form S-3 and the information required to be
  included in a post-effective amendment by those paragraphs is contained in
  periodic reports filed by the registrant pursuant to Section 13 or 15(d) of
  the Securities Exchange Act of 1934 that are incorporated by reference in the
  registration statement.

            (2) That, for the purpose of determining any liability under the
  Securities Act of 1933, each such post-effective amendment shall be deemed to
  be a new registration statement relating to the securities offered therein,
  and the offering of such securities at the time shall be deemed to be the
  initial bona fide offering thereof.

                                      II-3
<PAGE>
 
            (3) To remove from registration by means of a post-effective
  amendment any of the securities being registered which remain unsold at the
  termination of the offering.

       (b) That, for the purpose of determining any liability under the
  Securities Act of 1933, each filing of the registrant's annual report pursuant
  to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (and, where
  applicable, each filing of an employee benefits plan's annual report pursuant
  to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated
  by reference in this registration statement shall be deemed to be a new
  registration statement relating to the securities offered herein, and the
  offering of such securities at the time shall be deemed to be the initial bona
  fide offering thereof.

       (c) Insofar as indemnification for liabilities arising under the
  Securities Act of 1933 may be permitted to directors, officers and controlling
  persons of the registrant pursuant to the provisions referred to in Item 15 of
  this registration statement, or otherwise, the registrant has been advised
  that in the opinion of the Securities and Exchange Commission such
  indemnification is against public policy as expressed in the Act and is,
  therefore, unenforceable. In the event that a claim for indemnification
  against such liabilities (other than the payment by the registrant of expenses
  incurred or paid by a director, officer or controlling person of the
  registrant in the successful defense of any action, suit or proceeding) is
  asserted by such director, officer or controlling person in connection with
  the securities being registered, the registrant will, unless in the opinion of
  its counsel the matter has been settled by controlling precedent, submit to a
  court of appropriate jurisdiction the question whether such indemnification by
  the registrant is against public policy as expressed in the Act and will be
  governed by the final adjudication of such issue.

                                      II-4
<PAGE>
 
                                   SIGNATURES

       Pursuant to the requirements of the Securities Act of 1933, the Company
  certifies that it has reasonable grounds to believe that it meets all of the
  requirements for filing on Form S-3 and has duly caused this Registration
  Statement to be signed on its behalf by the undersigned, thereunto duly
  authorized, in the City of Houston and State of Texas on the 28th day of May,
  1997.

                                 UNITED MERIDIAN CORPORATION


                                 By:  /s/ John B. Brock
                                      --------------------------------------
                                      John B. Brock, Chairman of the Board 
                                      of Directors, Chief Executive Officer 
                                      and Director

       KNOW ALL BY THESE PRESENTS, that each of the undersigned directors and
  officers of United Meridian Corporation hereby constitutes and appoints John
  B. Brock, Jonathan M. Clarkson, Christopher E. Cragg and John J. Patton and
  each of them, his true and lawful attorney-in-fact and agent, with full power
  to act without the other and with full power of substitution and
  resubstitution, for him and on his behalf and in his name, place and stead, in
  any and all capacities, to sign, execute and file with the Securities and
  Exchange Commission and any state securities regulatory board or commission
  any documents relating to the proposed issuance and registration of the
  securities offered pursuant to this Registration Statement on Form S-3 under
  the Securities Act of 1933, including any and all amendments (including post-
  effective amendments and amendments thereto) to this Registration Statement on
  Form S-3 and any registration statement for the same offering that is to be
  effective upon filing pursuant to Rule 462(b) under the Securities Act of
  1933, with all exhibits and any and all documents required to be filed with
  respect thereto with any regulatory authority, granting unto said attorneys-
  in-fact and agents, and each of them, full power and authority to do and
  perform each and every act and thing requisite and necessary to be done in and
  about the premises in order to effectuate the same as fully to all intents and
  purposes as he might or could do if personally present, hereby ratifying and
  confirming all that said attorneys-in-fact and agents, or any of them, or
  their or his substitute or substitutes, may lawfully do or cause to be done.

       Pursuant to the requirements of the Securities Act of 1933, this
  Registration Statement on Form S-3 has been signed by the following persons in
  the capacities indicated on the 28th day of May, 1997.

       Signature                                  Title
       ---------                                  -----


         /s/ John B. Brock                  Chairman of the Board of Directors,
- --------------------------------------      Chief Executive Officer and Director
             John B. Brock                        


         /s/ James L. Dunlap                              President,
- --------------------------------------      Chief Operating Officer and Director
             James L. Dunlap                     


      /s/ Jonathan M. Clarkson               Executive Vice President and Chief
- --------------------------------------                 Financial Officer
          Jonathan M. Clarkson                 


      /s/ Christopher E. Cragg              Vice President, Controller and Chief
- --------------------------------------                 Accounting Officer
          Christopher E. Cragg                 


         /s/ J. Dennis Bonney                               Director
- --------------------------------------                        
             J. Dennis Bonney

                                      II-5
<PAGE>
 
         /s/ Charles R. Carson                             Director
- --------------------------------------                        
             Charles R. Carson


         /s/ Robert H. Dedman                              Director
- --------------------------------------                        
             Robert H. Dedman


         /s/ Robert L. Howard                              Director
- --------------------------------------                        
             Robert L. Howard


         /s/ Robert V. Lindsay                             Director
- --------------------------------------                        
             Robert V. Lindsay


         /s/ Elvis L. Mason                                Director
- --------------------------------------                        
             Elvis L. Mason


         /s/ James L. Murdy                                Director
- --------------------------------------                        
             James L. Murdy


         /s/ David K. Newbigging                           Director
- --------------------------------------                        
             David K. Newbigging


         /s/ Matthew R. Simmons                            Director
- --------------------------------------                        
             Matthew R. Simmons


         /s/ Donald D. Wolf                                Director
- --------------------------------------                        
             Donald D. Wolf


                                      II-6
<PAGE>
 
                                 EXHIBIT INDEX


  Exhibit No.                 Description                                   Page
  -----------                 -----------                                   ----

     3.1      Certificate of Incorporation of the Company, as amended,
              incorporated by reference to Exhibit 3.1 to UMC's 1995 Form 10-K
              filed with the Securities and Exchange Commission on March 7,
              1996.

     3.2      By-laws of the Company, as amended, incorporated by reference to
              Exhibit 3.2 to UMC's Form S-8 (No. 333-28017) filed with the
              Securities and Exchange Commission on May 29, 1997.

     4.1      Specimen of certificate representing Series A Voting Common Stock,
              par value $.01 per share, of the Company, incorporated by
              reference to Exhibit 4.13 to UMC's Form 10-Q for the period ended
              June 30, 1994 filed with the Securities and Exchange Commission on
              August 10, 1994.

     4.2      Rights Agreement by and between United Meridian Corporation and
              Chemical Mellon Shareholder Services, L.L.C., as Rights Agent,
              dated as of February 13, 1996, incorporated by reference as
              Exhibit 1 to Form 8-K, filed with the Securities and Exchange
              Commission on February 14, 1996.

     4.3      UMC 1994 Nonqualified Employee Stock Option Plan incorporated
              herein by reference to Exhibit 4.14 to the Company's Form S-8 (No.
              33-79160) filed with the Securities and Exchange Commission on May
              19, 1994.

     4.4      First Amendment to the UMC 1994 Employee Nonqualified Stock Option
              Plan dated November 16, 1994, incorporated herein by reference to
              Exhibit 4.11.1 to the Company's Form S-8 (No. 33-86480) filed with
              the Securities and Exchange Commission on November 18, 1994.

     4.5      Second Amendment to the UMC 1994 Employee Nonqualified Stock
              Option Plan dated May 22, 1996, incorporated herein by reference
              to Exhibit 4.3.2 to the Company's Form S-8 (No. 333-05401) filed
              with the Securities and Exchange Commission on June 6, 1996.

     4.6      Third Amendment to the UMC 1994 Employee Nonqualified Stock Option
              Plan dated November 13, 1996, incorporated herein by reference to
              Exhibit 4.3.3 to the Company's Form S-8 (No. 333-28017) filed with
              the Securities and Exchange Commission on May 29, 1997.

     4.7      Fourth Amendment to the UMC 1994 Employee Nonqualified Stock
              Option Plan dated May 29, 1997, incorporated herein by reference
              to Exhibit 4.3.4 to the Company's Form S-8 (No. 333-28017) filed
              with the Securities and Exchange Commission on May 29, 1997.

     4.8      UMC 1994 Outside Directors' Nonqualified Stock Option Plan,
              incorporated herein by reference to Exhibit 4.15 to the Company's
              Form S-8 (No. 33-79160) filed with the Securities and Exchange
              Commission on May 19, 1994.

     4.9      First Amendment to the UMC 1994 Outside Directors' Nonqualified
              Stock Option Plan dated May 22, 1996, incorporated herein by
              reference to Exhibit 4.4.1 to the Company's Form S-8 (No. 
              333-05401) filed with the Securities and Exchange Commission on 
              June 6, 1996.

     4.10     Second Amendment to the UMC 1994 Outside Directors' Nonqualified
              Stock Option Plan dated November 13, 1996, incorporated herein by
              reference to Exhibit 4.4 to the Company's Form S-8 (No. 333-28017)
              filed with the Securities and Exchange Commission on May 29, 1997.

    *5        Opinion and Consent of Akin, Gump, Strauss, Hauer & Feld, L.L.P.

    *23.1     Consent of Arthur Andersen LLP.
<PAGE>
 
    *23.2     Consent of Akin, Gump, Strauss, Hauer & Feld, L.L.P. (included in
              its opinion filed as Exhibit 5 hereto).

    *23.3     Consent of Netherland, Sewell & Associates, Inc.

    *23.4     Consent of McDaniel & Associates Consultants, Ltd.

    *23.5     Consent of Ryder Scott Company.

    *24       Power of Attorney (included on signature page of this Registration
              Statement).

  * Filed herewith.

<PAGE>
 
                                                                       Exhibit 5
                                                                       ---------

    [LETTERHEAD OF AKIN, GUMP, STRAUSS, HAUER & FELD, L.L.P. APPEARS HERE]


                                  May 27, 1997

United Meridian Corporation
1201 Louisiana, Suite 1400
Houston, Texas  77002

Ladies and Gentlemen:

     We have acted as counsel to United Meridian Corporation, a Delaware
corporation (the "Company"), in connection with the proposed registration of
4,300,000 shares of the Company's Series A Voting Common Stock, $.01 par value
(the "Common Stock"), as described in a registration statement on Form S-3
relating to the Common Stock to be issued under the Company's 1994 Employee
Nonqualified Stock Option Plan, as amended (the "Employee Plan"), and the
Company's 1994 Outside Directors' Nonqualified Stock Option Plan, as amended
(the "Director Plan"), which registration statement is to be filed with the
Securities and Exchange Commission.

     We have, as counsel, examined such corporate records, certificates and
other documents and reviewed such questions of law as we have deemed necessary,
relevant or appropriate to enable us to render the opinions listed below.  In
rendering such opinions, we have assumed the genuineness of all signatures and
the authenticity of all documents examined by us.  As to various questions of
fact material to such opinions, we have relied upon representations of the
Company.

     Based upon such examination and representations, we advise you that, in our
opinion:

     A.   The shares of Common Stock to be issued under the Employee Plan and
the Director Plan which are to be registered pursuant to the Registration
Statement have been duly and validly authorized by the Company.
<PAGE>
 
AKIN, GUMP, STRAUSS, HAUER & FELD, L.L.P.

United Meridian Corporation
May 27, 1997
Page 2


     B.   The shares of Common Stock to be issued under the Employee Plan and
the Director Plan which are to be registered pursuant to the Registration
Statement, when issued and delivered in accordance with the Employee Plan or the
Director Plan, will be validly issued, fully paid and non-assessable.

     We consent to the reference to this firm in the Registration Statement and
to the filing of this opinion as Exhibit 5 to the Registration Statement.



                                   Sincerely,

                                   /s/ Akin, Gump, Strauss, Hauer & Feld, L.L.P.

                                     AKIN, GUMP, STRAUSS, HAUER & FELD, L.L.P.

<PAGE>
 
                                  Exhibit 23.1

  Consent of Independent Public Accountants
  -----------------------------------------

  As independent public accountants, we hereby consent to the incorporation by
  reference in this Registration Statement of United Meridian Corporation (the
  "Company") on Form S-3 of our report dated February 20, 1997, included in the
  Annual Report on Form 10-K of the Company for the year ended December 31,
  1996, and to all references to our Firm included in this Registration 
  Statement.

  /s/ Arthur Andersen LLP

  Houston, Texas
  May 29, 1997

<PAGE>
 
                                  Exhibit 23.3

           CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS
           ---------------------------------------------------------

       We hereby consent to the incorporation by reference in this Registration
  Statement on Form S-3 of our reports dated March 13, 1997, March 14, 1997, and
  April 8, 1997, that were utilized in aggregate as a basis for United Meridian
  Corporation's Form 10-K for the year ended December 31, 1996, and to all
  references to our Firm included in this Registration Statement.

                                 NETHERLAND, SEWELL & ASSOCIATES, INC.



                                 By: /s/ DANNY D. SIMMONS
                                     --------------------------------
                                      Danny D. Simmons
                                      Senior Vice President

  Houston, Texas
  May 27, 1997

<PAGE>
 
                                 Exhibit 23.4


              CONSENT OF INDEPENDENT PETROLEUM RESERVE ENGINEERS


Dear Sirs:

We consent to the incorporation by reference in this Registration Statement on 
Form S-3 of portions of our reports entitled "UMC Petroleum Corporation, 
Evaluation of Certain Interests in the State of Montana, SEC Parameters, as of 
January 1, 1997", dated February 5, 1997; and "UMC Resources Canada Ltd., 
Evaluation of Oil & Gas Reserves, SEC Parameters, as of January 1, 1997", dated 
February 10, 1997 (the "Reports") and to our having evaluated the Corporations' 
interest in oil and gas reserves. We also consent to the reference of our firm 
under the caption "Experts".


Sincerely,

McDANIEL & ASSOCIATES CONSULTANTS LTD.



/s/ P.A. WELCH
- --------------------------------------
P. A. Welch, P. Eng.
Vice President

Calgary, Alberta
Dated:  May 28, 1997

<PAGE>
 
                                  Exhibit 23.5

                         Consent of Ryder Scott Company

       We consent to the incorporation by reference in the Registration
  Statement Form S-3 of our reserve report and all schedules, exhibits, and
  attachments thereto and to any reference made to us on Form S-3 as a result of
  such incorporation.

                                    Very truly yours,


                                    /s/ RYDER SCOTT COMPANY PETROLEUM ENGINEERS
                                    --------------------------------------------
                                    RYDER SCOTT COMPANY
                                    PETROLEUM ENGINEERS


  Denver, Colorado
  Date: May 28, 1997


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