HARKEN ENERGY CORP
S-3, 1997-05-20
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1
      As filed with the Securities and Exchange Commission on May 19, 1997
                                                      Registration No. _________
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-3
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

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

                           HARKEN ENERGY CORPORATION
             (Exact name of registrant as specified in its charter)

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

                                    DELAWARE
                        (State or other jurisdiction of
                         incorporation or organization)

                                   95-2841597
                    (I.R.S. employer identification number)

                           HARKEN ENERGY CORPORATION
                     5605 NORTH MACARTHUR BLVD., SUITE 400
                              IRVING, TEXAS 75038
                                 (972) 753-6900
              (Address, including zip code, and telephone number,
       including area code, of registrant's principal executive offices)

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

                               GREGORY S. PORTER
                             VICE PRESIDENT - LEGAL
                           HARKEN ENERGY CORPORATION
                     5605 NORTH MACARTHUR BLVD., SUITE 400
                              IRVING, TEXAS 75038
                                 (972) 753-6900
           (Name, address, including zip code, and telephone number,
                  including area code, of agent for service)

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

APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time to
time after the effective date of this Registration Statement.

     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 462(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 statement 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 Maximum            Proposed Maximum
Title of each Class of Securities to     Amount to be       Offering Price Per          Aggregate Offering         Amount of
           be Registered                  Registered             Unit(1)                     Price(1)           Registration Fee
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                         <C>                   <C>                       <C>                    <C>      
Common Stock, par value $0.01 per share     900,000               $4.25                     $3,825,000             $1,159.09
===================================================================================================================================
</TABLE>

(1)   Estimated solely for the purpose of calculating the registration fee 
      pursuant to Rule 457(c) based on the average of the high and low sales 
      prices of the common stock as reported by the American Stock Exchange on 
      May 13, 1997.

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>   2



PROSPECTUS

                                 900,000 Shares

                           HARKEN ENERGY CORPORATION

                                  Common Stock

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

     The 900,000 shares (the "Shares") of common stock, par value $0.01 per
share ("Common Stock"), of Harken Energy Corporation, a Delaware corporation
("Harken" or the "Company"), offered hereby are being offered by the
stockholders of the Company named herein (the "Selling Stockholders"). The
Company will not receive any of the proceeds from the sale of the Shares, but
the Company has agreed to bear certain expenses of registration of the Shares
under the federal and state securities laws (currently estimated to be $7,000),
and of any offering and sale hereunder not including certain expenses such as
commissions and discounts of underwriters, dealers or agents. See "Selling
Stockholders" and "Use of Proceeds."

     The Common Stock is traded on the American Stock Exchange, under the
symbol "HEC." On May __, 1997, the closing sales price of the Common Stock as
reported on the American Stock Exchange was $_____ per share.

     The Shares may be offered and sold from time to time by the Selling
Stockholders directly or through broker-dealers or underwriters who may act
solely as agents, or who may acquire the Shares as principals. The distribution
of the Shares may be effected in one or more transactions that may take place
through the American Stock Exchange or any other national securities exchange
on which the Common Stock is approved for listing in the future, including
block trades or ordinary broker's transactions, or through privately negotiated
transactions, or through an underwritten public offering, or through a
combination of any such methods of sale, at such prices as may be obtainable.
Usual and customary or specially negotiated brokerage fees or commissions may
be paid by the Selling Stockholders in connection with such sales. See "Plan of
Distribution."

     To the extent required, the specific shares of Common Stock to be sold,
the purchase price, public offering price, names of any agent, dealer or
underwriter, and any applicable commission or discount with respect to a
particular offering will be set forth in an accompanying Prospectus Supplement.
The aggregate proceeds to the Selling Stockholders from the sale of the Shares
will be the purchase price thereof less the aggregate agents' commissions and
underwriters' discounts, if any, and other expenses of distribution not borne
by the Company.

     The Selling Stockholders and any broker-dealers, agents or underwriters
that participate with the Selling Stockholders in the distribution of any of
the Shares may be deemed to be "underwriters" within the meaning of the
Securities Act of 1933, as amended (the "Securities Act"), and any commission
received by them and any profit on the resale of the Shares purchased by them
may be deemed to be underwriting commissions or discounts under the Securities
Act. See "Plan of Distribution" for indemnification arrangements.

     PROSPECTIVE INVESTORS SHOULD CONSIDER AND REVIEW THE INFORMATION UNDER THE
CAPTION "RISK FACTORS" BEGINNING ON PAGE 4 PRIOR TO AN INVESTMENT IN THE SHARES
OFFERED HEREBY.

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

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

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

                  The date of this Prospectus is May __, 1997.



<PAGE>   3



                            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, proxy statements and other information with the
Securities and Exchange Commission (the "Commission"). Such reports, proxy
statements and other information filed by the Company may be inspected and
copied, at prescribed rates, at the public reference facilities of the
Commission at 450 Fifth Street, N.W., Washington, D.C. 20549, Room 1024, as
well as at the regional offices of the Commission at Seven World Trade Center,
13th Floor, New York, New York 10048, and Northwestern Atrium Center, 500 West
Madison Street, Suite 1400, Chicago, Illinois 60601. Copies of such material
may also be obtained at prescribed rates by writing to the Public Reference
Section of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549.
The Common Stock is listed on the American Stock Exchange. Reports, proxy
statements and other information described above may also be inspected and
copied at the offices of the American Stock Exchange at 86 Trinity Place, New
York, New York 10006.

     The Company has filed with the Commission a registration statement on Form
S-3 (the "Registration Statement") under the Securities Act, with respect to
the Shares offered hereby. This Prospectus, which constitutes a part of the
Registration Statement, does not contain all the information set forth in the
Registration Statement and the exhibits thereto. For further information with
respect to the Company and the Common Stock, reference is hereby made to such
Registration Statement and exhibits. Statements contained herein concerning the
provisions of any documents are necessarily summaries of those documents, and
each statement is qualified in its entirety by reference to the copy of the
applicable document filed with the Commission. The Registration Statement and
any amendments thereto, including exhibits filed as a part thereof, are
available for inspection and copying as set forth above.


                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                           <C>
Available Information .....................................................    2
Incorporation of Certain Documents by Reference ...........................    3
The Company ...............................................................    4
Risk Factors ..............................................................    4
Use of Proceeds ...........................................................    7
Selling Stockholder .......................................................    8
Plan of Distribution ......................................................    9
Legal Matters .............................................................   10
Experts ...................................................................   10
</TABLE>


     NO PERSON HAS BEEN 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 BY THE COMPANY, THE SELLING STOCKHOLDER OR ANY OTHER PERSON.
THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN
OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES TO WHICH IT RELATES OR
ANY OFFER TO OR SOLICITATION OF AN OFFER TO BUY SUCH SECURITIES IN ANY
CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL. NEITHER THE
DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY
CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF OR THAT THE INFORMATION CONTAINED
HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.


                                       2

<PAGE>   4



                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents which have been filed with the Commission are
incorporated herein by reference:

     (1) The Company's Annual Report on Form 10-K for the year ended December
         31, 1996;

     (2) The Company's Quarterly Report on Form 10-Q for the quarter ended
         March 31, 1997;

     (3) The Company's Proxy Statement for the Annual Meeting of Stockholders
         of Harken held on June 11, 1996;

     (4) Additional Solicitation Materials dated May 12, 1997 for the Annual
         Meeting of Stockholders of Harken to be held on June 11, 1997; and

     (5) The description of the Common Stock contained in the Company's
         Registration Statement on Form 8-A, as amended, including all 
         amendments and reports filed for the purpose of updating such 
         description.

     All documents filed by Harken pursuant to Section 13(a), 13(c), 14 or
15(d) of the Exchange Act subsequent to the date of this Prospectus and prior
to the termination of the offering made hereby shall be deemed to be
incorporated by reference in this Prospectus and to be a part hereof from the
date of the filing of such documents. Any statement contained in this
Prospectus, in a supplement to this Prospectus or in a document incorporated or
deemed to be incorporated by reference herein, shall be deemed to be modified
or superseded for purposes of this Prospectus to the extent that a statement
contained herein, or in any subsequently filed supplement to this Prospectus or
in any document that also is or is deemed to be incorporated by reference
herein, modifies or supersedes such statement. Any statement so modified or
superseded shall not be deemed, except as so modified or superseded, to
constitute a part of this Prospectus.

     The Company will furnish without charge to each person to whom a copy of
this Prospectus has been delivered, upon written or oral request, a copy of any
or all documents incorporated by reference in this Prospectus, other than
exhibits to such documents unless such exhibits are specifically incorporated
by reference in such documents. Written or oral requests for such copies should
be directed to Gregory S. Porter, Harken Energy Corporation, 5605 North
MacArthur Blvd., Suite 400, Irving, Texas 75038 (Telephone: (972) 753- 6900).


                                       3

<PAGE>   5



                                  THE COMPANY

     Harken is engaged in oil and gas exploration, development and production
operations both domestically and internationally through its various
wholly-owned subsidiaries and joint venture investments. Harken's domestic
operations include oil and gas exploration and production operations in the
Paradox Basin in Utah, the Gulf Coast of Texas, the Texas Panhandle, the
Magnolia region of Arkansas and the Carlsbad region of New Mexico. Harken's
international operations include four exclusive Colombian Association Contracts
between Harken's wholly-owned subsidiary, Harken de Colombia, Ltd., and Empresa
Colombiana de Petroleos.

     Harken was incorporated in 1973 in the State of California and
reincorporated in 1979 in the State of Delaware. Harken's principal offices are
located at 5605 North MacArthur Blvd., Suite 400, Irving, Texas 75038 and its
telephone number is (972) 753-6900.

                                  RISK FACTORS

     Prior to making an investment decision, prospective investors should
consider carefully all of the information set forth in this Prospectus and, in
particular, should evaluate the following risk factors.

LOSSES FROM CONTINUING OPERATIONS

       Harken reported losses from continuing operations for the fiscal years
ended December 31, 1994, 1995 and 1996 in the amounts of $8,211,000, $1,625,000
and $341,000, respectively. There can be no assurance that Harken will not
continue to report losses.

DILUTION; EFFECT OF SALES OF COMMON STOCK ON MARKET PRICE

     As of May 8, 1997, there were 104,698,246 shares of Common Stock
outstanding. Harken has previously registered with the Commission an aggregate
of 3,905,994 shares of Common Stock for resale by certain stockholders of the
Company, in addition to the 900,000 shares of Common Stock registered for
resale pursuant to the Registration Statement of which this Prospectus forms a
part. In addition, Harken has reserved a significant number of shares of Common
Stock for future issuance as described below. There can be no assurance that
the sale of the 3,905,994 shares of Common Stock previously registered for
resale or the issuance of the shares of Common Stock which have been reserved
for future issuance will not have a material adverse effect on the then
prevailing market price of the Common Stock. Furthermore, issuance of the
shares of Common Stock as described below could result in significant dilution
to the stockholders of the Company.

     On July 30, 1996, Harken issued $40,000,000 in principal amount of its 6
1/2% Senior Convertible Notes due 2000 (the "Notes"). The Notes are convertible
into shares of Common Stock by the holders thereof at a conversion price of
$2.50 per share. In addition, Harken has the right to mandatorily convert all
of the Notes into Common Stock at any time on or after July 31, 1997. Harken
intends to force the conversion of all outstanding Notes on July 31, 1997. As
of May 8, 1997, Notes in the principal amount of $20,950,000 remained
outstanding and are convertible into 8,380,000 shares of Common Stock.

     Harken has reserved additional shares of Common Stock for issuance as
follows: (i) 2,602,974 shares of Common Stock have been reserved for issuance
upon exercise of outstanding warrants; and (ii) 5,399,300 shares of Common
Stock have been reserved for issuance upon exercise of outstanding stock
options and stock options which may be issued pursuant to Harken's existing
stock option plans.

VOLATILITY OF HARKEN COMMON STOCK TRADING PRICE

     The daily closing prices of the Common Stock as reported by the American
Stock Exchange has fluctuated significantly over the past 12 months, ranging
from a high of $5.44 per share to a low of $1.75 per share. Management believes
that the price fluctuations and trading activity in the Common Stock during the
past 12 months are attributable to a number of factors, including Harken's
international exploration activities. There


                                       4

<PAGE>   6



can be no assurance that future announcements regarding Harken's international
exploration efforts will not have a substantial adverse effect on the then
prevailing market price of the Common Stock.

CONTINGENT LIABILITIES OF HARKEN

     Harken has certain contingent liabilities that could have a material
adverse effect on its financial condition if Harken were required to satisfy
these liabilities, including the following:

     Harken Southwest Corporation ("HSW") owns an interest in the Aneth Gas
Plant. The Aneth Gas Plant facility was in operation for many years prior to
HSW becoming an owner. The operations at the Aneth Gas Plant previously used
open, unlined drip pits for storage of various waste products. The current
plant owners have replaced all of the open ground pits currently being used
with steel tanks. The plant owners are currently in the process of closing the
open ground pits.

     Texaco, the plant's operator, received a letter from the Environmental
Protection Agency ("EPA") dated July 21, 1991 and a subsequent letter dated
June 8, 1992, in which the EPA requested certain information in order to
determine if hazardous substances had been released into the environment at the
Aneth Gas Plant. Texaco has advised HSW that certain information was supplied
to the EPA pursuant to this request. Subsequently, core samples in and around
certain pit areas were jointly taken by the EPA and Texaco. The EPA approved a
plan dated April 12, 1996 proposed by Texaco for the remediation and closure of
the pits.

     The prior owner of the Aneth Gas Plant facility, El Paso Natural Gas, has
agreed to accept financial responsibility for a portion of the remediation
work. Texaco and the other current plant owners, including HSW, have entered
into a formal agreement with the prior owner to allocate costs between
remediation work that is mandated by the EPA and other remediation work that is
determined to be carried out by the parties. The prior owner will bear
approximately 86% of the costs of mandated remediation as well as certain other
related expenses. The prior owner will not be responsible for other remediation
work that does not fall within the mandated category. At this time, however, it
is impossible for HSW to accurately estimate the costs of the cleanup at the
Aneth Gas Plant facility or the amount of such total costs the indemnification
from the prior owner will cover for the mandated remediation work. Harken has
accrued a contingency reserve of $219,000 at March 31, 1997 for management's
best estimate of its share of remediation expenditures.

PREFERRED STOCK AUTHORIZED FOR ISSUANCE

     Harken has ten million shares of preferred stock available for issuance.
The Board of Directors is authorized to issue such preferred stock in one or
more series and to set the designations, preferences, powers and relative
rights and restrictions thereof without further approval by the stockholders of
the Company. Presently, Harken has four series of preferred stock authorized,
but no shares of preferred stock are currently outstanding. Such shares of
preferred stock, if issued, would have certain preferences over the shares of
Common Stock with respect to the payment of dividends and upon liquidation,
dissolution, winding-up and in certain instances, voting. The Board of
Directors of Harken also may authorize additional series of preferred stock in
the future that have similar or additional preferences over the shares of
Common Stock.

RISKS RELATED TO INTERNATIONAL OPERATIONS

     Harken presently conducts international operations and anticipates that it
will conduct significant international operations in the future. Foreign
properties, operations or investments may be adversely affected by local
political and economic developments, exchange controls, currency fluctuations,
royalty and tax increases, retroactive tax claims, renegotiation of contracts
with governmental entities, expropriation, import and export regulations and
other foreign laws or policies governing operations of foreign-based companies,
as well as by laws and policies of the United States affecting foreign trade,
taxation and investment. In addition, as certain of Harken's operations are
governed by foreign laws, in the event of a dispute, Harken may be subject to
the exclusive jurisdiction of foreign courts or may not be successful in
subjecting foreign persons to the jurisdiction of courts in the United States.
Harken may also be hindered or prevented from enforcing its rights


                                       5

<PAGE>   7



with respect to a governmental instrumentality because of the doctrine of
sovereign immunity. Exploration and production activities in areas outside the
United States are also subject to the risks inherent in foreign operations,
including loss of revenue, property and equipment as a result of hazards such
as expropriation, nationalization, war, insurrection and other political risks.

     Harken anticipates that full development of the oil and gas reserves in
the contract areas covered by Harken's four Colombian Association Contracts
will take several years and may require extensive production facilities which
could require significant additional capital expenditures. The ultimate amount
of such expenditures cannot be presently predicted. Harken anticipates that
amounts required to fund international activities, including those in Colombia,
will be funded from existing cash balances, asset sales, stock issuances,
production payments, operating cash flows and potentially from industry
partners; however, there can be no assurance that Harken will have adequate
funds available to it to fund its international activities or that
participation from industry partners can be obtained. In addition, Harken faces
certain deadlines for completing specific projects required pursuant to the
four Association Contracts. Failure to meet any of such deadlines could result
in Harken losing its rights to one or more of the Association Contracts, which
could have a material adverse effect on Harken's business.

INDUSTRY RISKS

     Oil and Gas Price Volatility. The revenues generated by Harken are highly
dependent upon the prices of crude oil and natural gas. Fluctuations in the
energy market make it difficult to estimate future prices of oil and natural
gas. Fluctuations in energy prices are caused by a number of factors, including
regional, domestic and international demand, energy legislation, federal or
state taxes on sales of crude oil and natural gas, production guidelines
established by the Organization of Petroleum Exporting Countries, and the
relative abundance of supplies of alternative fuel such as coal. Additionally,
changing international economic and political conditions may have a dramatic
impact upon crude oil and natural gas prices. Many of these factors are beyond
the control of Harken.

     Business Risks. Harken must continually acquire or explore for and develop
new oil and gas reserves to replace those being depleted by production. Without
successful drilling or acquisition ventures, Harken's oil and gas assets,
properties and revenues derived therefrom will decline over time. To the extent
Harken engages in drilling activities, such activities carry the risk that no
commercially viable oil or gas production will be obtained. The cost of
drilling, completing and operating wells is often uncertain. Moreover, drilling
may be curtailed, delayed or canceled as a result of many factors, including
shortage of available working capital, title problems, weather conditions,
environmental concern, shortages of or delays in delivery of equipment, as well
as the financial instability of well operators, major working interest owners
and drilling and well servicing companies. The availability of a ready market
for Harken's oil and gas depends on numerous factors beyond its control,
including the demand for and supply of oil and gas, the proximity of Harken's
natural gas reserves to pipelines, the capacity of such pipelines, fluctuation
in seasonal demand, the effects of inclement weather, and government
regulation. New gas wells may be shut-in for lack of a market until a gas
pipeline or gathering system with available capacity is extended into the area.

     Operating Hazards and Uninsured Risks. The operations of Harken are
subject to the inherent risks normally associated with exploration for and
production of oil and gas, including blowouts, cratering, pollution and fires,
each of which could result in damage to or destruction of oil and gas wells or
production facilities or damage to persons and property. As is common in the
oil and gas industry, Harken is not fully insured against these risks, either
because insurance is not available or because Harken has elected to self-insure
due to high premium costs. The occurrence of a significant event not fully
insured against could have a material adverse effect on Harken's financial
condition.

     Environmental Regulation. Harken's domestic activities are subject to
various Navajo, federal, state, and local laws and regulations covering the
discharge of material into the environment or otherwise relating to protection
of the environment. In particular, Harken's oil and gas exploration,
development, production, its activities in connection with storage and
transportation of liquid hydrocarbons and its use of facilities for


                                       6

<PAGE>   8



treating, processing, recovering, or otherwise handling hydrocarbons and wastes
therefrom are subject to stringent environmental regulation by governmental
authorities. In addition to these domestic laws and regulations, Harken's
international operations are subject to the laws, regulations and governmental
approvals of each foreign country in which it conducts activities including,
but not limited to, environmental laws and regulations governing oil and gas
operations. Such domestic and foreign laws and regulations have increased the
costs of planning, designing, drilling, installing, operating and abandoning
Harken's oil and gas wells and other facilities.

     Imprecise Nature of Reserve Estimates. Reserve estimates are imprecise and
may be expected to change as additional information becomes available.
Furthermore, estimates of oil and gas reserves, of necessity, are projections
based on engineering data, and there are uncertainties inherent in the
interpretation of such data as well as the projection of future rates of
production and the timing of development expenditures. Reserve engineering is a
subjective process of estimating underground accumulations of oil and gas that
cannot be measured in an exact way, and the accuracy of any reserve estimate is
a function of the quality of available data and of engineering and geological
interpretation and judgment.

     Competition. The oil and gas industry is competitive in all its phases.
Competition is particularly intense respecting the acquisition of desirable
producing properties and the sale of oil and natural gas production. Harken's
competitors in oil and gas exploration, development and production include
major oil companies and numerous independent oil and gas companies, and
individual producers and operators. Many of Harken's competitors possess and
employ financial and personnel resources substantially greater than those which
are available to Harken, and may, therefore, be able to pay greater amounts for
desirable leases and to define, evaluate, bid for and purchase a greater number
of producing prospects than the financial or personnel resources of Harken will
permit.

     Extensive Regulation. The production of oil and gas is subject to
extensive Navajo, federal and state laws, rules, orders and regulations
governing a wide variety of matters, including the drilling and spacing of
wells, allowable rates of production, prevention of waste and pollution and
protection of the environment. In addition to these domestic laws and
regulations, Harken's international operations are subject to the laws,
regulations and governmental approvals of each foreign country in which it
conducts activities including, but not limited to, environmental laws and
regulations governing oil and gas operations. Such laws, rules and regulations
are subject to change. Any such change in any law, rule or regulation could
have the effect of increasing the Company's cost of exploration or production
or may limit the Company's revenues by regulating the level of oil and gas
production, either of which could have a material adverse effect on the
financial condition of the Company.

                                USE OF PROCEEDS

     Harken will not receive any part of the proceeds from the sale of Shares
by the Selling Stockholder.


                                       7

<PAGE>   9



                              SELLING STOCKHOLDER

     This Prospectus covers the offer and sale of the Shares by the Selling
Stockholders. Set forth below are the names of the Selling Stockholders, the
nature of any position, office or other material relationship that the Selling
Stockholders have had within the last three years with the Company or any of
its predecessors or affiliates, the number of shares of Common Stock owned by
the Selling Stockholders as of the date of this Prospectus, the number of
shares of Common Stock which may be offered by the Selling Stockholders
pursuant to this Prospectus, and the number of shares of Common Stock owned by
the Selling Stockholders upon completion of the offering if all of the Shares
held by the Selling Stockholders are sold. Any or all of the Shares listed
below may be offered for sale by the Selling Stockholders from time to time.

<TABLE>
<CAPTION>
                                                                                                                Percent of
                                                                                                                  Common
                                                   Shares                                    Shares                Stock
                                                 Owned Prior           Shares                Owned              Owned After
                                                   to the              Offered             After the                the
           Selling Stockholder                    Offering             Hereby             Offering(1)           Offering(1)
- ------------------------------------------     ---------------     ---------------      ----------------     -----------------
<S>                                                <C>                 <C>                     <C>                   <C>
Arbco Associates L.P.                              282,857             282,857                -0-                   -0-
Offense Group Associates L.P.                      282,857             282,857                -0-                   -0-
Kayne Anderson Nontraditional                      282,857             282,857                -0-                   -0-
Investments L.P.
Opportunity Associates L.P.                         51,429              51,429                -0-                   -0-
</TABLE>

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

(1)    Assumes no other disposition or acquisition of Common Stock and all 
       Shares included herein are sold.





                                       8

<PAGE>   10



                              PLAN OF DISTRIBUTION


     The Company will not receive any proceeds from the sale of Common Stock
owned by the Selling Stockholders. It is anticipated that the Selling
Stockholders will offer the Shares in the manner set forth on the cover page of
this Prospectus, from time to time, directly or through broker-dealers or
underwriters who may act solely as agents or may acquire the Shares as
principals, in all cases as designated by the Selling Stockholders. Such
underwriters or broker-dealers acting either as principal or as agent, may
receive compensation in the form of usual and customary or specifically
negotiated underwriting discounts, concessions or commissions from the Selling
Stockholders or the purchasers of the securities offered hereby for whom they
may act as agent.

     The net proceeds to the Selling Stockholders from the sale of Common Stock
so offered will be the purchase price of the Common Stock sold less the
aggregate agents' commissions and underwriters' discounts, if any, and other
expenses of issuance and distribution not borne by the Company. The Selling
Stockholders and any dealers or agents that participate in the distribution of
Common Stock may be deemed to be "underwriters" within the meaning of the
Securities Act.

     At any time a particular offer of Common Stock is made, to the extent
required, the specific shares of Common Stock to be sold, the purchase price,
public offering price, the names of any such agent, dealer or underwriter and
any applicable commission or discount with respect to a particular offering
will be set forth in an accompanying Prospectus Supplement. Such Prospectus
Supplement may, if necessary, be in the form of a post-effective amendment to
the Registration Statement of which this Prospectus is a part, and will be
filed with the Commission to reflect the disclosure of additional information
with respect to the distribution of such securities.

     Pursuant to an agreement between the Company and Selling Stockholder, the
Company has agreed to file a "shelf" registration statement pursuant to Rule
415 under the Securities Act covering the sale of shares of Common Stock held
by the Selling Stockholder, and to use its reasonable best efforts to maintain
the effectiveness of any such registration statement for no less than 180 days
from the date of effectiveness of such registration statement. In addition, the
Company has agreed to bear certain expenses of registration of the Shares under
the federal and state securities laws (currently estimated to be $7,000) and of
any offering and sale hereunder not including certain expenses such as
commissions or discounts of underwriters, dealers or agents attributable to the
sale of such Common Stock. The Company has also agreed to indemnify the Selling
Stockholder against certain liabilities, including liabilities under the
Securities Act, or to contribute to payments the Selling Stockholder may be
required to make in respect thereof.

     To comply with the securities laws of certain jurisdictions, the
securities offered hereby may be offered or sold in such jurisdictions only
through registered or licensed brokers or dealers. In addition, in certain
jurisdictions the securities offered hereby may not be offered or sold unless
they have been registered or qualified for sale in such jurisdictions or an
exemption from registration or qualification is available and is complied with.

     The Selling Stockholder and any other person participating in such
distribution will be subject to applicable provisions of the Exchange Act and
the rules and regulations thereunder, including, without limitation, Rules
10b-6 and 10b-7, which provisions may limit the timing of purchases and sales
by the Selling Stockholder and any other such person. Furthermore, under Rule
10b-6 under the Exchange Act, any person engaged in a distribution of the
Common Stock may not simultaneously engage in market making activities with
respect to such securities for a period of two business days prior to the
commencement of such distribution. All of the foregoing may affect the
marketability of the securities offered hereby.




                                       9

<PAGE>   11



                                 LEGAL MATTERS

     The validity of the Shares will be passed upon for Harken by Gregory S.
Porter, Esq., Vice President Legal of Harken.


                                    EXPERTS

     The consolidated financial statements of the Company included in the
Company's Annual Report on Form 10-K for the year ended December 31, 1996,
which is incorporated by reference herein, have been audited by Arthur Andersen
LLP, independent public accountants, as indicated in their report with respect
thereto, and are incorporated by reference herein in reliance upon the
authority of said firm as experts in accounting and auditing in giving said
report.



                                       10

<PAGE>   12



                                    PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The expenses to be paid by the Company in connection with the offering
described in this Registration Statement are estimated as follows:


<TABLE>
<S>                                                         <C>       
Commission Registration Fee.......                          $ 1,159.00
Printing and Engraving Expenses                               2,000.00
Accounting Fees and Expenses......                            2,000.00
Blue Sky Fees and Expenses........                            1,000.00
Miscellaneous.....................                              841.00
                                                            ----------
            Total..........                                 $ 7,000.00
                                                            ==========
</TABLE>

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     Under Section 145 of the General Corporation Law of the State of Delaware
("Delaware Law"), a Delaware corporation may indemnify its directors, officers,
employees and agents against expenses (including attorneys fees), judgments,
fines and settlements in nonderivative suits, actually and reasonably incurred
by them in connection with the defense of any action, suit or proceeding in
which they or any of them were or are made parties or are threatened to be made
parties by reason of their serving or having served in such capacity. Delaware
law, however provides that such person must have acted in good faith and in a
manner they reasonably believed to be in or not opposed to the best interests
of the corporation, and in the case of a criminal action, such person must have
had no reasonable cause to believe his or her conduct was unlawful. Section 145
further provides that in connection with the defense or settlement of any
action by or in the right of the corporation, a Delaware corporation may
indemnify its directors and officers against expenses actually and reasonably
incurred by them if, in connection with the matters in issue, they acted in
good faith, in a manner they reasonably believed to be in or not opposed to the
best interests of the corporation, except that no indemnification may be made
with respect to any claim, issue or matter as to which such person has been
adjudged liable for negligence or misconduct unless the Court of Chancery or
the court in which such action or suit is brought approves such
indemnification. Section 145 further permits a Delaware corporation to grant
its directors and officers additional rights of indemnification through bylaw
provisions and otherwise, and to purchase indemnity insurance on behalf of its
directors and officers. Indemnification is mandatory to the extent a claim,
issue or matter has been successfully defended.

     Article Ten of the Company's Certificate of Incorporation and Article VII
of the Company's bylaws provide, in general, that the Company shall indemnify
its directors and officers under certain of the circumstances defined in
Section 145. The Company has entered into agreements with each member of its
Board of Directors pursuant to which it will advance to each director costs of
litigation in accordance with the indemnification provisions of the Company's
Certificate of Incorporation and bylaws.

ITEM 16.  EXHIBITS.

      4.1     -     Form of certificate representing shares of Common Stock 
                    (filed as Exhibit 1 to Harken's Registration Statement on
                    Form 8-A, File No. 0-9207, and incorporated by reference
                    herein).


                                      II-1

<PAGE>   13



      4.2     -     Certificate of the Designations, Powers, Preferences and 
                    Rights of Series C Cumulative Convertible Preferred Stock,
                    $1.00 par value of Harken Energy Corporation (filed as
                    Exhibit 4.3 to Harken's Annual Report on Form 10-K for
                    fiscal year ended December 31, 1989, File No. 0-9207, and
                    incorporated by reference herein).
      4.3     -     Certificate of the Designations of Series D Preferred Stock,
                    $1.00 par value of Harken Energy Corporation (filed as
                    Exhibit 4.3 to Harken's Quarterly Report on Form 10-Q for
                    the quarterly period ended September 30, 1995, File No.
                    0-9207, and incorporated by reference herein).
     *5.1     -     Opinion of Gregory S. Porter, Esq.
    *23.1     -     Consent of Arthur Andersen LLP.
    *23.2     -     Consent of Gregory S. Porter, Esq. (included in opinion 
                    filed as Exhibit 5.1).
    *24.1     -     Powers of Attorney.

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

* Filed herewith.


ITEM 17.  UNDERTAKINGS.

       (a) The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's Annual Report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act") (and, where
applicable, each filing of an employee benefit plan's annual report pursuant to
Section 15(d) of the Exchange Act) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

       (b) The undersigned Registrant hereby undertakes:

           (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;

                   (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
                         thereto) which, individually or in the aggregate,
                         represent a fundamental change in the information set
                         forth in the Registration Statement. Notwithstanding
                         the foregoing, any increase or decrease in volume of
                         securities offered (if the total dollar value of
                         securities offered would not exceed that which was
                         registered) and any deviation from the low or high end
                         of the estimated maximum offering range may be
                         reflected in the form of prospectus filed with the
                         Commission pursuant to Rule 424(b) if, in the
                         aggregate, the changes in volume and price represent
                         no more than a 20% change in the maximum aggregate
                         offering price set forth in the "Calculation of
                         Registration Fee" table in the effective 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 (i) and (ii) above do not apply if the
registration statement is on Form S-3 or Form S-8, and the information required
to be included in a post-effective amendment by those paragraphs


                                      II-2

<PAGE>   14



is contained in periodic reports filed by the Registrant pursuant to Section 13
or Section 15(d) of the Exchange Act that are incorporated by reference in the
Registration Statement.

           (2) That, for the purpose of determining any liability under the
Securities Act, 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 that time shall be deemed to be the initial bona
fide offering thereof.

           (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.

       (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the Registrant pursuant to the provisions described under Item 15 above, or
otherwise, the Registrant has been advised that, in the opinion of the
Commission, such indemnification is against public policy as expressed in the
Securities 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 it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.




                                      II-3

<PAGE>   15



                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant 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 Irving, State of Texas, on May 19, 1997.

                                       HARKEN ENERGY CORPORATION


                                                        *
                                       -----------------------------------------
                                       Mikel D. Faulkner, Chairman of the Board 
                                       and Chief Executive Officer


         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.


<TABLE>
<CAPTION>
           Signature                                      Title                                         Date
- -------------------------------         -----------------------------------------           ----------------------------
<S>                                     <C>                                                 <C>


             *                          Chairman of the Board and Chief                     May 19, 1997
- -------------------------------         Executive Officer (Principal
Mikel D. Faulkner                       Executive Officer)          
                                                                    



             *                          President and Chief Operating                       May 19, 1997
- -------------------------------         Officer  and Director
Richard H. Schroeder                                         




             *                          Senior Vice President, Chief                        May 19, 1997
- -------------------------------         Financial Officer and Director   
Bruce N. Huff                           (Principal Accounting Officer and
                                        Principal Financial Officer)     
                                                                         



             *                          Director                                            May 19, 1997
- -------------------------------
Michael M. Ameen, Jr.



                                        Director                                            May 19, 1997
- -------------------------------
Michael R. Eisenson
</TABLE>



                                      II-4

<PAGE>   16






<TABLE>
<S>                                     <C>                                                 <C>
                                        Director                                            May 19, 1997
- -------------------------------
Hobart A. Smith



            *                           Director                                            May 19, 1997
- -------------------------------
Donald W. Raymond



            *                           Director                                            May 19, 1997
- -------------------------------
Gary B. Wood
</TABLE>


*Gregory S. Porter, by signing his name hereto, does hereby sign this
Registration Statement on behalf of Harken Energy Corporation and each of the
above-named officers and directors of such Company pursuant to powers of
attorney, executed on behalf of the Company and each officer and director.


/s/ Gregory S. Porter
- -------------------------------
Gregory S. Porter,
Attorney-in-Fact


                                      II-5

<PAGE>   17



                               INDEX TO EXHIBITS


<TABLE>
<CAPTION>
                                                                                            Sequentially
   Exhibit No.                                         Exhibit                             Numbered Page
- ------------------        ------------------------------------------------------        --------------------
     <S>                  <C>                                                           <C>
       4.1                Form of certificate representing shares of Harken     
                          common stock, par value $.01 per share (filed as      
                          Exhibit 1 to Harken's Registration Statement on Form  
                          8-A, File No. 0- 9207, and incorporated by reference  
                          herein).                                              
                                                                                
       4.2                Certificate of the Designations, Powers, Preferences  
                          and Rights of Series C Cumulative Convertible         
                          Preferred Stock, $1.00 par value of Harken Energy     
                          Corporation (filed as Exhibit 4.3 to Harken's Annual  
                          Report on Form 10-K for the fiscal year ended         
                          December 31, 1989, File No. 0-9207, and incorporated  
                          by reference herein).                                 
                                                                                
       4.3                Certificate of the Designations of Series D Preferred 
                          Stock, $1.00 par value of Harken Energy Corporation   
                          (filed as Exhibit 4.3 to Harken's Quarterly Report on 
                          Form 10-Q for the quarterly period ended September    
                          30, 1995, File No. 0- 9207, and incorporated by       
                          reference herein).                                    
                                                                                
      *5.1                Opinion of Gregory S. Porter, Esq.                    
                                                                                
     *23.1                Consent of Arthur Andersen LLP.                       
                                                                                
     *23.2                Consent of Gregory S. Porter, Esq. (included in       
                          opinion filed as Exhibit 5.1).                        
                                                                                
     *24.1                Powers of Attorney.                                   
</TABLE>

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



<PAGE>   1



                                                                     Exhibit 5.1



May 19, 1997





Harken Energy Corporation
5605 N. MacArthur Blvd
Suite 400
Irving, TX  75038

       Re:    Registration Statement on Form S-3

Gentlemen:

       I have acted as counsel to Harken Energy Corporation, a Delaware
corporation (the "Company"), in connection with the registration under the
Securities Act of 1933, as amended (the "Act"), of the offer and sale of an
aggregate of 900,000 shares (the "Shares") of common stock, $.01 par value per
share, of the Company ("Common Stock") pursuant to a Registration Statement on
Form S-3 of the Company (the "Registration Statement") to which this opinion
letter is an exhibit.

       In reaching the opinion set forth herein, I have reviewed (a) the
Registration Statement, (b) the Certificate of Incorporation of the Company, as
amended, (c) the Bylaws of the Company, (d) records of proceedings of the Board
of Directors and the stockholders of the Company and (e) except as set forth
below, such other agreements, certificates of public officials and officers of
the Company, records, documents and matters of law that I deemed relevant.

       Based on and subject to the foregoing and subject further to the
assumptions, exceptions and qualifications hereinafter stated, I am of the
opinion that, subject to compliance with federal and state securities laws (as
to which I express no opinion), the Shares have been duly authorized and
validly issued and are fully paid and nonassessable.

       The opinion expressed above is subject in all respects to the following
assumptions, exceptions and qualifications:

       a.     I have assumed that (i) all signatures on all documents examined
              by me are genuine, (ii) all documents submitted to me as
              originals are accurate and complete, (iii) all documents
              submitted to me as copies are true and correct copies of the
              originals thereof, (iv) all information submitted to me is
              accurate and complete as of the date hereof, (v) all persons
              executing and delivering documents reviewed by me were competent
              to execute and to deliver such documents and (vi) that all
              persons signing, in a representative capacity, documents reviewed
              by me had authority to sign in such capacity.

       b.     I have assumed that there are no agreements, indentures,
              mortgages, deeds of trust or instruments that affect the ability
              of the Company to issue the Shares.

       The opinions expressed above are limited to the laws of the State of
Texas, the General Corporation Law of the State of Delaware and the federal
laws of the United States of America. You should be aware that I am not
admitted to the practice of law in the State of Delaware and my opinion herein
as to the General Corporation





<PAGE>   2


Harken Energy Corporation
May 19, 1997
Page 2

Law of the State of Delaware is based solely upon the unofficial compilation
thereof contained in Prentice Hall Information Services Corporation Statutes.

       This opinion letter may be filed as an exhibit to the Registration
Statement. In giving this consent, I do not thereby admit that I come into the
category of persons whose consent is required under Section 7 of the Act or the
rules and regulations of the Securities and Exchange Commission promulgated
thereunder.

       I disclaim any duty to advise you regarding any changes in, or to
otherwise communicate with you with respect to, the matters addressed herein.



                                                   Very truly yours,



                                                   /s/ Gregory S. Porter
                                                   Gregory S. Porter, Esq.



<PAGE>   1
                                                                    Exhibit 23.1



                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement on Form S-3 of our report dated
February 21, 1997, included in Harken Energy Corporation's Form 10-K for the
year ended December 31, 1996, and to all references to our Firm included in
this registration statement.




                                               ARTHUR ANDERSEN LLP


Dallas, Texas
May 19, 1997



<PAGE>   1
                                                                    Exhibit 24.1


                               POWER OF ATTORNEY



KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints Mikel D. Faulkner, Bruce N. Huff, Larry E. Cummings and Gregory S.
Porter, or any of them (with full power of each of them to act alone), his true
and lawful attorney-in-fact and agent, with full power of substitution, for him
and on his behalf and in his name, place and stead, in any and all capacities,
to sign, execute and file a Registration Statement on Form S-3 under the
Securities Act of 1933, as amended, and any or all amendments (including
without limitation, post-effective amendments and any amendment or amendments
increasing the amount of securities for which registration is being sought),
with all exhibits and any and all documents required to be filed with respect
thereto, with the Securities and Exchange Commission and/or any regulatory
authority relating to the registration of 900,000 shares of Common Stock, $0.01
par value, of Harken Energy Corporation and such additional shares of Common
Stock as the holders of "piggy-back" registration rights may request to be
included in such registration statement, 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 and to all intents and
purposes as he himself might or could do of personally present, hereby
ratifying and confirming all that the said attorneys-in-fact and agents, or any
of them, or their substitute or substitutes, may lawfully do or cause to be
done.

IN WITNESS WHEREOF, this Power of Attorney has been signed by the following
persons in the capacities indicated as of the 9th day of May, 1997.


<TABLE>
<CAPTION>
NAME                                                CAPACITIES
<S>                                                 <C>
/s/ Mikel D. Faulkner                               Chairman of the Board, Director and
- --------------------------------------              Chief Executive Officer      
Mikel D. Faulkner                                   (Principal Executive Officer)
                                                                                 

/s/ Bruce N. Huff                                   Senior Vice President, Chief Financial
- --------------------------------------              Officer and Director                        
Bruce N. Huff                                       (Principal Financial and Accounting Officer)
                                                                                                

/s/  Richard H. Schroeder                           President, Chief Operating Officer
- --------------------------------------              and Director
Richard H. Schroeder                                            
</TABLE>



<PAGE>   2


POWER OF ATTORNEY
May 9, 1997
Page 2


<TABLE>
<S>                                                 <C>
/s/ Michael M. Ameen, Jr.                           Director
- --------------------------------------
Michael M. Ameen, Jr.

                                                    Director
- --------------------------------------
Michael R. Eisenson

                                                    Director
- --------------------------------------
Hobart A. Smith

/s/ Donald W. Raymond                               Director
- --------------------------------------
Donald W. Raymond

/s/ Gary B. Wood                                    Director
- --------------------------------------
Gary B. Wood
</TABLE>




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