EXHIBIT 10.90

            FIRST AMENDMENT TO EMPLOYMENT AGREEMENT

     THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT is made
effective as of October 14, 1998 by and between RANDEEP GREWAL
(the "Executive") and HORIZONTAL VENTURES, INC., a Colorado
corporation (formerly known as Petro Union, Inc.) (the
"Employer").

                             RECITALS

     WHEREAS, the Employer and the Executive entered into that
certain Employment Agreement dated September 9, 1997 (the
"Agreement"), and

     WHEREAS, the Employer and the Executive desire to amend
certain provisions of the Agreement as of the date hereof, and

     WHEREAS, the Employer and the Executive desire to amend
certain additional provisions of the Agreement contingent upon,
and effective as of, the closing of a transaction between the
Employer and SABA Petroleum Company, whereby the Employer shall
gain effective control of SABA Petroleum Company (the "SABA
Petroleum Transaction"), presently scheduled to close in or about
December, 1998.

     NOW, THEREFORE, the parties hereto, intending to be legally
bound, and for good and valuable consideration, agree as follows:

     1.    Effective as of the date hereof, the Agreement shall
be amended as follows:

           a.    The second and third sentences of Section 3(a)
of the Agreement are deleted in their entirety and the following
shall be inserted in place thereof:

           In addition, at the option of the Executive's 
           Estate, the Employer shall either (i) pay to 
           the Executive's Estate, in a lump sum within 
           60 days of the end of the Employer's then-current
           fiscal year, an amount (to the extent such amount 
           is a positive number) equal to the value of all
           Employer stock and stock options held by the 
           Executive as of the date of his death, or (ii)
           distribute to the Executive's Estate, within 60 
           days of the Executive's death, all Employer stock 
           and stock options held by the Executive as of 
           the date of his death, all in accordance with the
           terms of any benefits to which the Executive would 
           be entitled in any plan in which he is a participant.

           b.    Section 3(b) of the Agreement is deleted in its
entirety and the following shall be inserted in place thereof:

                 (b)   Disability.  In the event that the
           Executive in unable to substantially perform his
           duties hereunder for a period of six months during 
           any continuous period of 12 months due to physical 
           or mental illness or disability, whether or not
           connected to his employment hereunder, the 
           Employer shall have the right, by written notice 
           to the Executive, to place the Executive on 
           disability status.  In such event, the Employer 
           shall pay to the Executive (or to his Estate if 
           the Executive is no longer alive) his base salary 
           and furnish to the Executive and his family all
           benefits during the Severance Period.  The
           determination of the Executive's disability shall 
           be made by the Executive's regular treating 
           physician.  If the Employer disagrees with the
           conclusion of said physician, it may engage a 
           second physician to examine the Executive.  If 
           these physicians disagree, then the parties shall
           select a third physician to examine the Executive, 
           in which event their majority opinion shall be
           conclusive.

           c.    Clause "(iv)" of Section 3(c) of the Agreement
is deleted in its entirety.

           d.    Clause "(iii)" of Section 3(d) of the Agreement
is deleted in its entirety and the following shall be inserted in
place thereof:

           (iii) Employer's requirement of the Executive 
           that he be based at any office or location 
           other than New York, New York, except for travel
           reasonably required in the performance of the
           Executive's responsibilities;

           e.    Clause "(iii)" of Section 3(e) of the Agreement
is deleted in its entirety and the following shall be inserted in
place thereof:

           (iii) specifies the effective date of the termination
(which date shall be not more than 15 days after the giving of
such notice) (the "Date of Termination").

           f.    Clause "(B)" of Section 4(d)(i) of the Agreement
is deleted in its entirety and the following shall be inserted in
place thereof:

                 B.   the Executive's base salary for 
           the balance of the term of this Agreement at 
           the rate in effect as of the Date of 
           Termination; and

           g.    Clause "(F)" of Section 4(d)(i) of the Agreement
is deleted in its entirety and the following shall be inserted in
place thereof:

                 F.   at the option of the Executive or 
           his legal representative, the Employer shall 
           either (i) pay to the Executive or his legal
           representative, in a lump sum within 30 days 
           of the Date of Termination, an amount (to the 
           extent such amount is a positive number) equal 
           to the value of all Employer stock and stock 
           options held by the Executive as of the Date 
           of Termination, or (ii) distribute to the 
           Executive or his legal representative, within 
           30 days of the Date of Termination, all Employer 
           stock and stock options held by the Executive as 
           of the Date of Termination.  Further, for the
           remainder of the Severance Period, or such 
           longer period as any plan, program or policy 
           may provide, the Employer shall continue 
           benefits to the Executive and the Executive's 
           family at least equal to those which would 
           have been provided to them in accordance with 
           the plans, programs and policies described in 
           this Agreement as if the Executive's employment 
           had not been terminated, including health 
           insurance and life insurance, or, if more 
           favorable, in accordance with the plans, programs 
           or policies of the Employer in effect at any time
           thereafter with respect to other key executives 
           and their families; for purposes of eligibility 
           for retiree benefits pursuant to such plans, 
           programs and policies, the Executive shall be
           considered to have remained employed until the 
           end of the Severance Period and to have retired 
           on the last day of such period.

           h.    Section 8 of the Agreement is deleted in its
entirety and the following shall be inserted in place thereof:

                 8.   Stock Grants.  Upon the Effective 
           Date, the Executive shall be issued 30,000 
           shares of the Employer's Common Stock, no par 
           value per share.  These shares shall be fully 
           vested and non-forfeitable as of the date of 
           their issuance.

           i.    Section 9(e) of the Agreement is deleted in its
entirety and the following shall be inserted in place thereof:

                 (e)   Fringe Benefits.  During the term,
           the Executive shall be entitled to those fringe
           benefits offered to other key employees of 
           Employer, as well as an automobile allowance 
           of $1,000 per month.

     2.    Effective immediately upon the close of the SABA
Petroleum Transaction, the Agreement shall be amended as follows:

           a.    The first paragraph of Section 3 of the
Agreement shall be deleted in its entirety and the following
shall be inserted in place thereof:

                 3.    Term and Termination.  The term of 
           this Agreement shall commence on the Effective 
           Date and shall continue uninterrupted through 
           and including the fifth anniversary of the 
           closing of SABA Petroleum Transaction unless 
           sooner terminated or extended by mutual written
           agreement.  The Executive's employment hereunder 
           may be terminated as follows:

           b.    The first sentence of Section 7 of the Agreement
shall be deleted in its entirety and the following shall be
inserted in place thereof:

           In consideration for his services, Employer 
           shall pay the Executive a salary at the rate 
           of $250,000 per annum.

     3.     Miscellaneous.

            a.    All other provisions of the Agreement, to the
extent not amended or superseded by the terms of this First
Amendment to the Agreement, are hereby ratified and reaffirmed.

            b.    The parties acknowledge that the Agreement, as
amended or superseded by the terms of this First Amendment to the
Agreement, constitutes all of the terms of the Employer's
employment of the Executive during the term set forth in the
Agreement, as amended, and that such terms integrate all previous
oral and written communications and understandings between the
parties with respect to the terms of the Employer's employment of
the Executive.  The parties also acknowledge that any
representations made or communications effected by them, in each
case relating to this First Amendment to the Agreement, as void
unless set forth in this writing.

            c.    This First Amendment to the Agreement shall be
binding upon and insure to the benefit of the parties hereto and
their respective successors and permitted assigns.

            d.    This First Amendment to the Agreement may be
executed in one or more counterparts, each of which shall be an
original, with the same effect as if the signatures thereto and
hereto were upon the same instrument.

            e.    This First Amendment to the Agreement shall be
governed by and construed in accordance with the domestic laws
of, and enforced exclusively in, the State of New York, without
giving effect to any choice or conflict of law provision or rule
that would cause the application of the laws of any jurisdiction
other than the State of New York.

            f.    No amendment of any provision of this First
Amendment to the Agreement shall be valid unless the same shall
be in writing and signed by all of the parties hereto.

     IN WITNESS WHEREOF, the parties hereto have executed this
First Amendment to the Agreement as of the date first above
written.

                                  EMPLOYER:

                                  HORIZONTAL VENTURES, INC.


                                  By:__________________________ 
                                     Name: 
                                     Title: 


                                  EXECUTIVE


                                   /s/ Randeep S. Grewal
                                   _____________________________
                                   Randeep Grewal