EXHIBIT 10.2
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                                   SCHEDULE K




                                   NEXEN INC.




                           __________________________


                                    GUARANTEE

                           __________________________




                            MADE AS OF JULY 22, 2005




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                                TABLE OF CONTENTS

ARTICLE 1 INTERPRETATION.......................................................1
   1.1      DEFINITIONS........................................................1
   1.2      HEADINGS...........................................................2
   1.3      NUMBER; PERSONS; INCLUDING.........................................2
   1.4      INTEREST ACT (CANADA)..............................................3
   1.5      NOMINAL RATES......................................................3
ARTICLE 2 GUARANTEE............................................................3
   2.1      GUARANTEE OF OBLIGATIONS...........................................3
   2.2      INDEMNITY..........................................................3
   2.3      GUARANTOR AS PRINCIPAL OBLIGOR.....................................3
   2.4      GUARANTEE ABSOLUTE AND UNCONDITIONAL...............................4
ARTICLE 3 DEALINGS WITH THE OBLIGORS AND OTHERS................................6
   3.1      NO RELEASE.........................................................6
   3.2      NO EXHAUSTION OF REMEDIES..........................................6
   3.3      EVIDENCE OF OBLIGATIONS............................................6
   3.4      NO SET-OFF.........................................................7
ARTICLE 4 CONTINUING GUARANTEE.................................................7
   4.1      CONTINUING GUARANTEE...............................................7
   4.2      REVIVAL OF INDEBTEDNESS............................................7
ARTICLE 5 DEMAND FOR PAYMENT, EXPENSES AND INTEREST............................7
   5.1      DEMAND FOR PAYMENT.................................................7
   5.2      STAY OF ACCELERATION...............................................7
   5.3      EXPENSES...........................................................8
   5.4      INTEREST...........................................................8
ARTICLE 6 SUBROGATION..........................................................8
   6.1      SUBROGATION........................................................8
ARTICLE 7 GENERAL..............................................................9
   7.1      WAIVER OF NOTICES..................................................9
   7.2      BENEFIT OF THE GUARANTEE...........................................9
   7.3      FOREIGN CURRENCY OBLIGATIONS.......................................9
   7.4      TAXES AND SET-OFF BY GUARANTOR.....................................9
   7.5      NO WAIVER; REMEDIES...............................................10
   7.6      SEVERABILITY......................................................10
   7.7      AMENDMENTS AND WAIVERS............................................10
   7.8      ADDITIONAL SECURITY...............................................10
   7.9      NOTICES...........................................................11
   7.10     ASSIGNMENT........................................................12
   7.11     TIME OF ESSENCE...................................................13
   7.12     FINANCIAL CONDITION OF THE OBLIGORS...............................13
   7.13     ACKNOWLEDGEMENT OF DOCUMENTATION..................................13
   7.14     ENTIRE AGREEMENT..................................................13
   7.15     GOVERNING LAW.....................................................13
   7.16     ATTORNMENT........................................................13


                                      -i-


                                   NEXEN INC.

                                   GUARANTEE


THIS GUARANTEE is made as of July 22, 2005

WHEREAS each of the Obligors is a Subsidiary of the Guarantor;

AND WHEREAS the Guarantor has agreed to provide a guarantee with respect to the
Credit Facilities provided to the Obligors by the Lenders pursuant to the Credit
Agreement;

NOW THEREFORE, in consideration of the covenants and agreements herein
contained, the sum of Cdn. $10.00 now paid by the Beneficiaries to the Guarantor
and other good and valuable consideration (the receipt and sufficiency of which
are hereby conclusively acknowledged), the Guarantor hereby covenants and agrees
with the Beneficiaries as follows:

                                   ARTICLE 1
                                 INTERPRETATION

1.1      DEFINITIONS

         (a)    In this Guarantee and the recitals hereto, unless something in
                the subject matter or context is inconsistent therewith:

         "BENEFICIARIES" means, collectively, the U.S. Facility Lenders, the
         U.K. Facility Lenders, the U.S. Agent and the U.K. Agent, and
         "BENEFICIARY" means any one of such Lenders or Agents.

         "BENEFICIARIES' COUNSEL" means McCarthy Tetrault LLP or such other firm
         of lawyers as may be selected by the Beneficiaries from time to time.

         "BORROWERS" means, collectively, the Guarantor and the Obligors and
         each of their successors.

         "CREDIT AGREEMENT" means the credit agreement made as of July 22, 2005
         between the Borrowers, as borrowers, The Toronto-Dominion Bank and such
         other financial institutions as become parties thereto, as lenders, and
         The Toronto-Dominion Bank, as Canadian Agent, Toronto Dominion (Texas)
         LLC, as U.S. Agent, and The Toronto-Dominion Bank, London Branch, as
         U.K. Agent, as the same may be amended, modified, supplemented or
         restated from time to time in accordance with the provisions thereof.

         "DEFAULT RATE" means a rate per annum that is equal to (i) in respect
         of amounts due in Canadian Dollars, the rate of interest then payable
         under the Credit Agreement on Canadian Prime Rate Loans (without giving
         effect to Section 5.12 of the Credit Agreement) plus 1.0% per annum,
         (ii) in respect of amounts due in United States Dollars, the rate of
         interest then payable under the Credit Agreement, on U.S. Prime Rate
         Loans (without giving effect to Section 5.12 of the Credit Agreement)
         plus 1.0% per annum or (iii) in respect of amounts


                                      -2-


         due in Pounds Sterling, the rate of interest then payable under the
         Credit Agreement on GBP Call Rate Loans (without giving effect to
         Section 5.12 of the Credit Agreement) plus 1.0% per annum.

         "DOCUMENTS" means, collectively, the Documents as defined in the Credit
         Agreement (other than this Guarantee).

         "GUARANTEE" means this guarantee, as amended, modified, supplemented or
         restated from time to time in accordance with the provisions hereof.

         "GUARANTOR" means Nexen Inc. and its successors.

         "OBLIGATIONS" means, collectively and at any time and from time to
         time, all of the obligations, indebtedness and liabilities (present or
         future, absolute or contingent, matured or not) of each of the Obligors
         to the applicable Agent and the applicable Lenders under, pursuant or
         relating to the Credit Agreement and other Documents and including all
         Outstanding Principal and all interest, commissions, legal and other
         costs, charges and expenses payable by each of the Obligors under the
         Credit Agreement and other Documents, whether the same are from time to
         time reduced and thereafter increased or entirely extinguished and
         thereafter incurred again.

         "OBLIGORS" means, collectively, Nexen Holdings U.S.A. Inc. and Nexen
         Petroleum U.K. Limited.

         (b)    Capitalized words and phrases used in this Guarantee and the
                recitals hereto without express definition herein shall, unless
                something in the subject matter or context is inconsistent
                therewith, have the same defined meanings as are ascribed to
                such words and phrases in the Credit Agreement. For certainty,
                if the Credit Agreement ceases to be in force for any reason
                whatsoever, then for all purposes hereof the aforementioned
                capitalized words and phrases shall continue to have the same
                defined meanings set forth in the Credit Agreement as if such
                agreement remained in force in the form immediately prior to its
                ceasing to be in force.

1.2      HEADINGS

         The division of this Guarantee into Articles and Sections and the
         insertion of headings are for convenience of reference only and shall
         not affect the construction or interpretation of this Guarantee. The
         terms "this Guarantee", "hereof", "hereunder" and similar expressions
         refer to this Guarantee and not to any particular Article, Section or
         other portion hereof and include any agreement supplemental hereto.
         Unless something in the subject matter or context is inconsistent
         therewith, references herein to Articles and Sections are to Articles
         and Sections of this Guarantee.

1.3      NUMBER; PERSONS; INCLUDING

         Words importing the singular number only shall include the plural and
         VICE VERSA, words importing the masculine gender shall include the
         feminine and neuter genders and vice versa and words importing persons
         shall include individuals, partnerships, associations, trusts,


                                      -3-


         unincorporated organizations and corporations and vice versa and words
         and terms denoting inclusiveness (such as "include" or "includes" or
         "including"), whether or not so stated, are not limited by their
         context or by the words or phrases which precede or succeed them.

1.4      INTEREST ACT (CANADA)

         Whenever a rate of interest hereunder is calculated on the basis of a
         year (the "deemed year") which contains fewer days than the actual
         number of days in the calendar year of calculation, such rate of
         interest shall be expressed as a yearly rate for the purposes of the
         INTEREST ACT (Canada) by multiplying such rate of interest by the
         actual number of days in the calendar year of calculation and dividing
         it by the number of days in the deemed year.

1.5      NOMINAL RATES

         The principle of deemed reinvestment of interest shall not apply to any
         interest calculation under this Guarantee; all interest payments to be
         made hereunder shall be paid without allowance or deduction for deemed
         reinvestment or otherwise, before and after demand, default and
         judgment. The rates of interest specified in this Guarantee are
         intended to be nominal rates and not effective rates and any interest
         calculated hereunder shall be calculated using the nominal rate method
         and not the effective rate method of calculation.


                                   ARTICLE 2
                                   GUARANTEE

2.1      GUARANTEE OF OBLIGATIONS

         The Guarantor hereby unconditionally and irrevocably guarantees to the
         Beneficiaries the payment and performance of all of the Obligations,
         together with interest thereon as provided in Section 5.4.

2.2      INDEMNITY

         If any or all of the Obligations are not duly paid or performed by the
         Obligors or either of them, as the case may be, and are not recoverable
         under Section 2.1 for any reason whatsoever, the Guarantor will, as a
         separate and distinct obligation, indemnify and save harmless the
         Beneficiaries from and against all losses resulting from the failure of
         the Obligors or either of them, as the case may be, to pay and perform
         such Obligations.

2.3      GUARANTOR AS PRINCIPAL OBLIGOR

         If any or all of the Obligations are not duly paid or performed by the
         Obligors or either of them, as the case may be, and are not recoverable
         under Section 2.1 or the Beneficiaries are not indemnified under
         Section 2.2, in each case, for any reason whatsoever, such Obligations
         shall, as a separate and distinct obligation, be recoverable by the
         Beneficiaries from the Guarantor as if the Guarantor were the primary
         obligor and principal debtor in respect thereof and shall be paid to
         the Beneficiaries forthwith after demand therefore as provided herein.



                                      -4-


2.4      GUARANTEE ABSOLUTE AND UNCONDITIONAL

         The liability and obligations of the Guarantor hereunder shall be
         continuing, unconditional and absolute and, without limiting the
         generality of the foregoing, shall not be released, discharged, limited
         or otherwise affected by:

         (a)    any extension, other indulgence, renewal, settlement, discharge,
                compromise, waiver, subordination or release in respect of any
                Obligation, security, person or otherwise, including any
                extension, other indulgence, renewal, settlement, discharge,
                compromise, waiver, subordination or release of any of the
                Obligations, covenants or undertakings of the Obligors or either
                of them, as the case may be, under the Documents;

         (b)    any modification or amendment of or supplement to the
                Obligations;

         (c)    any loss of or in respect of any security held by the
                Beneficiaries, whether occasioned by the fault of the
                Beneficiaries or otherwise, including any release,
                non-perfection or invalidity of any such security;

         (d)    any change in the existence, structure, constitution, name,
                control or ownership of the Obligors or either of them, as the
                case may be, or any other person, or any insolvency, bankruptcy,
                reorganization or other similar proceeding affecting the
                Obligors or either of them, as the case may be, or any other
                person or their respective assets;

         (e)    the existence of any set-off, counterclaim, claim or other right
                which the Guarantor, the Obligors or either of the Obligors, as
                the case may be, may have at any time against the Beneficiaries
                or any other person, whether in connection with the Credit
                Agreement, this Guarantee or any unrelated transaction;

         (f)    any provision of applicable law purporting to prohibit or limit
                the payment by the Obligors or either of them, as the case may
                be, of any Obligation, and the foregoing is hereby waived by the
                Guarantor to the extent permitted under applicable law;

         (g)    any limitation, postponement, prohibition, subordination or
                other restriction on the right of a Beneficiary to payment of
                the Obligations;

         (h)    any release, substitution or addition of any other guarantor of
                the Obligations;

         (i)    any defence arising by reason of any failure of any Beneficiary
                to make any presentment, demand, or protest or to give any other
                notice, including notice of all of the following: acceptance of
                this Guarantee, partial payment or non-payment of all or any
                part of the Obligations and the existence, creation, or
                incurring of new or additional Obligations;

         (j)    any defence arising by reason of any failure of a Beneficiary to
                proceed against the Obligors or either of them, as the case may
                be, or any other person, or to apply or exhaust any security
                held from the Obligors or either of them, as the case may be, or


                                      -5-


                any other person for the Obligations, to proceed against, apply
                or exhaust any security held from the Guarantor or any other
                person, or to pursue any other remedy available to the
                Beneficiaries;

         (k)    any defence arising by reason of the invalidity, illegality or
                lack of enforceability of the Obligations or any part thereof or
                of any security or guarantee in support thereof, or by reason of
                any incapacity, lack of authority, or other defence of the
                Obligors or either of them, as the case may be, or any other
                person, or by reason of any limitation, postponement or
                prohibition on a Beneficiary's rights to payment, or the
                cessation from any cause whatsoever of the liability of the
                Obligors or either of them, as the case may be, or any other
                person with respect to all or any part of the Obligations (other
                than irrevocable payment to the Beneficiaries in full, in cash,
                of the Obligations), or by reason of any act or omission of the
                Beneficiaries or others which directly or indirectly results in
                the discharge or release of the Obligors or either of them, as
                the case may be, or any other person or of all or any part of
                the Obligations or any security or guarantee therefor, whether
                by contract, operation of law or otherwise;

         (l)    any defence arising by reason of the failure by a Beneficiary to
                obtain, register, perfect or maintain a Security Interest in or
                upon any property of the Obligors or either of them, as the case
                may be, or any other person, or by reason of any interest of the
                Beneficiaries in any property, whether as owner thereof or as
                holder of a Security Interest therein or thereon, being
                invalidated, voided, declared fraudulent or preferential or
                otherwise set aside, or by reason of any impairment of any right
                or recourse to collateral;

         (m)    any defence arising by reason of the failure of the
                Beneficiaries to marshal assets;

         (n)    to the extent permitted under applicable law, any defence based
                upon any failure of the Beneficiaries to give to the Obligors or
                either of them, as the case may be, or the Guarantor notice of
                any sale or other disposition of any property securing any or
                all of the Obligations or any other guarantee thereof, or any
                notice that may be given in connection with any sale or other
                disposition of any such property;

         (o)    any defence based upon or arising out of any bankruptcy,
                insolvency, reorganization, moratorium, arrangement,
                readjustment of debt, liquidation or dissolution proceeding
                commenced by or against the Obligors or either of them, as the
                case may be, or any other person, including any discharge or bar
                against collection of any of the Obligations; or

         (p)    any other law, event or circumstance or any other act or failure
                to act or delay of any kind by the Obligors or either of them,
                as the case may be, the Beneficiaries or any other person, which
                might, but for the provisions of this Section, constitute a
                legal or equitable defence to or discharge, limitation or
                reduction of the Guarantor's obligations hereunder, other than
                as a result of the payment or extinguishment in full of the
                Obligations.



                                      -6-


         The foregoing provisions apply and the foregoing waivers, to the extent
         permitted under applicable law, shall be effective even if the effect
         of any action or failure to take action by the Beneficiaries is to
         destroy or diminish the Guarantor's subrogation rights, the Guarantor's
         right to proceed against the Obligors or either of them, as the case
         may be, for reimbursement, the Guarantor's right to recover
         contribution from any other guarantor or any other right or remedy of
         the Guarantor.


                                   ARTICLE 3
                      DEALINGS WITH THE OBLIGORS AND OTHERS

3.1      NO RELEASE

         The Beneficiaries, without releasing, discharging, limiting or
         otherwise affecting in whole or in part the Guarantor's liability and
         obligations hereunder, may:

         (a)    grant time, renewals, extensions, indulgences, releases and
                discharges to the Obligors or either of them, as the case may
                be, or any other guarantor or endorser;

         (b)    take or abstain from taking security or collateral from the
                Obligors or either of them, as the case may be, or any other
                guarantor or endorser or from perfecting security or collateral
                of the Obligors or either of them, as the case may be, or any
                other guarantor or endorser;

         (c)    accept compromises from the Obligors or either of them, as the
                case may be, or any other guarantor or endorser;

         (d)    subject to the Documents, apply all money at any time received
                from the Obligors or either of them, as the case may be, or from
                security upon such part of the Obligations as the Beneficiaries
                may see fit or change any such application in whole or in part
                from time to time as the Beneficiaries may see fit; or

         (e)    otherwise deal with each of the Obligors or either of them, as
                the case may be, and all other persons and security as the
                Beneficiaries may see fit.

3.2      NO EXHAUSTION OF REMEDIES

         The Beneficiaries shall not be bound or obligated to exhaust their
         recourse against the Obligors or either of them, as the case may be, or
         other persons or any securities or collateral it may hold or take any
         other action (other than to make demand pursuant to Article 5) before
         the Beneficiaries shall be entitled to demand, enforce and collect
         payment from the Guarantor hereunder.

3.3      EVIDENCE OF OBLIGATIONS

         Any account settled or stated in writing by or between a Beneficiary or
         the Beneficiaries, as the case may be, and the Obligors or either of
         them, as the case may be, shall be PRIMA FACIE evidence that the
         balance or amount thereof appearing due to the same is so due.



                                      -7-


3.4      NO SET-OFF

         In any claim by the Beneficiaries against the Guarantor hereunder, the
         Guarantor shall not claim or assert any set-off, counterclaim, claim or
         other right that the Obligors or either of them, as the case may be, or
         the Guarantor may have against one or more of the Beneficiaries.


                                   ARTICLE 4
                              CONTINUING GUARANTEE

4.1      CONTINUING GUARANTEE

         This Guarantee shall be a continuing guarantee and shall continue to be
         effective even if at any time any payment of any of the Obligations is
         rendered unenforceable or is rescinded or must otherwise be returned by
         any Beneficiary for any reason whatsoever (including the insolvency,
         bankruptcy or reorganization of the Obligors or either of them, as the
         case may be), all as though such payment had not been made.

4.2      REVIVAL OF INDEBTEDNESS

         If at any time, all or any part of any payment previously received by a
         Beneficiary and applied to any Obligation must be rescinded or returned
         by the Beneficiary for any reason whatsoever (including the insolvency,
         bankruptcy or reorganization of the Obligors or either of them, as the
         case may be), such Obligation shall, for the purpose of this Guarantee,
         to the extent that such payment must be rescinded or returned, be
         deemed to have continued in existence, notwithstanding such application
         by the Beneficiary, and this Guarantee shall continue to be effective
         or be reinstated, as the case may be, as to such Obligation as though
         such application by the Beneficiary had not been made.


                                   ARTICLE 5
                    DEMAND FOR PAYMENT, EXPENSES AND INTEREST

5.1      DEMAND FOR PAYMENT

         The Beneficiaries shall be entitled to make demand upon the Guarantor
         at any time during the continuance of a Event of Default and upon any
         such demand the Beneficiaries may (provided a written notice of
         acceleration has been given in accordance with Section 11.2 of the
         Credit Agreement, in the case of an Event of Default specified in
         Sections 11.1(a) to (d), inclusive, or Sections 11.1(g) to (m),
         inclusive, of the Credit Agreement) treat all Obligations as due and
         payable and may forthwith collect from the Guarantor all Obligations.
         The Guarantor shall make payment to or performance in favour of the
         Beneficiaries of all Obligations forthwith after demand therefor is
         made upon the Guarantor by the Beneficiaries as aforesaid.

5.2      STAY OF ACCELERATION

         If acceleration of the time for payment of any amount payable by the
         Obligors or either of them, as the case may be, in respect of the
         Obligations is stayed upon the insolvency,


                                      -8-


         bankruptcy, arrangement or reorganization of the Obligors or either of
         them, as the case may be, or any moratorium affecting the payment of
         the Obligations, all such amounts that would otherwise be subject to
         acceleration shall nonetheless be payable by the Guarantor hereunder
         forthwith on demand by the Beneficiaries.

5.3      EXPENSES

         The Guarantor shall pay to the Beneficiaries all reasonable out of
         pocket costs and expenses, including all reasonable legal fees (on a
         solicitor and his own client basis) and other expenses incurred by the
         Beneficiaries from time to time in the enforcement, realization and
         collection of or in respect of this Guarantee. All such amounts shall
         be payable by the Guarantor on demand by the Beneficiaries.

5.4      INTEREST

         Any payment obligation comprised in the Obligations guaranteed
         hereunder which is not paid when due hereunder shall bear interest, to
         the extent not already included in the Obligations, both before and
         after default or judgment, from the date of demand pursuant to Section
         5.1 to the date of payment at the rate or rates provided in the
         relevant Document for such Obligations or, in the event no such rate is
         provided for therein, at a rate per annum that is equal to the Default
         Rate. Any other amounts payable pursuant hereto, including pursuant to
         Section 5.3, which are not paid when due hereunder shall bear interest,
         both before and after default or judgment, from the date of demand
         pursuant to Section 5.1 to the date of payment or reimbursement thereof
         by the Guarantor at a rate per annum that is equal to the Default Rate.
         All such interest shall accrue daily and shall be payable by the
         Guarantor on demand by the Beneficiaries.


                                    ARTICLE 6
                                   SUBROGATION

6.1      SUBROGATION

         (a)    Until all the Obligations have been irrevocably paid in full in
                cash, the Guarantor shall have no right of subrogation to, and
                waives to the fullest extent permitted by applicable law, any
                right to enforce any remedy which the Beneficiaries now have or
                may hereafter have against the Obligors or either of them, as
                the case may be, in respect of the Obligations, and until such
                time the Guarantor waives any benefit of, and any right to
                participate in, any security, now or hereafter held by the
                Beneficiaries for the Obligations.

         (b)    If (i) the Guarantor performs or makes payment to the
                Beneficiaries of all amounts owing by the Guarantor under this
                Guarantee, (ii) the Obligations are performed and irrevocably
                paid in full and (iii) each of the Credit Facilities has been
                fully cancelled in accordance with the Credit Agreement, then
                the Beneficiaries will, at the Guarantor's request, execute and
                deliver to the Guarantor appropriate documents, without recourse
                and without representation and warranty, necessary to evidence
                the transfer by subrogation to the Guarantor of the
                Beneficiaries' interest in the


                                      -9-


         Obligations and any security held therefor resulting from such
         performance or payment by the Guarantor.


                                    ARTICLE 7
                                     GENERAL

7.1      WAIVER OF NOTICES

         The Guarantor hereby waives promptness, diligence, presentment, demand
         of payment, notice of acceptance and any other notice with respect to
         this Guarantee and the obligations guaranteed hereunder, except for the
         demand pursuant to Section 5.1.

7.2      BENEFIT OF THE GUARANTEE

         This Guarantee shall enure to the benefit of the respective successors
         and permitted assigns of the Beneficiaries and be binding upon the
         successors of the Guarantor.

7.3      FOREIGN CURRENCY OBLIGATIONS

         The Guarantor shall make payment relative to each Obligation in the
         currency (the "original currency") in which the Obligors or either of
         them, as the case may be, are required to pay such Obligation. If the
         Guarantor makes payment relative to any Obligation to the Beneficiaries
         in a currency (the "other currency") other than the original currency
         (whether voluntarily or pursuant to an order or judgment of a court or
         tribunal of any jurisdiction), such payment shall constitute a
         discharge of the liability of the Guarantor hereunder in respect of
         such Obligation only to the extent of the amount of the original
         currency which the Beneficiaries are able to purchase with the amount
         of other currency they receive on the date of receipt in accordance
         with normal practice. If the amount of the original currency which the
         Beneficiaries are able to purchase is less than the amount of such
         currency originally due in respect of the relevant Obligation, the
         Guarantor shall indemnify and save the Beneficiaries harmless from and
         against any loss or damage arising as a result of such deficiency. This
         indemnity shall constitute an obligation separate and independent from
         the other obligations contained in this Guarantee, shall give rise to a
         separate and independent cause of action, shall apply irrespective of
         any indulgence granted by the Beneficiaries and shall continue in full
         force and effect notwithstanding any judgment or order in respect of
         any amount due hereunder or under any judgment or order. A certificate
         of a Beneficiary as to any such loss or damage shall constitute PRIMA
         FACIE evidence thereof, in the absence of manifest error.

7.4      TAXES AND SET-OFF BY GUARANTOR

         All payments by the Guarantor under this Guarantee, whether in respect
         of principal, interest, interest on overdue and unpaid interest, fees
         or any other Obligations, shall be made in full without any deduction
         or withholding (whether in respect of set-off, counterclaim, duties,
         Taxes, charges or otherwise whatsoever) unless the Guarantor is
         prohibited by applicable laws from doing so, in which event the
         Guarantor shall:


                                      -10-


         (a)    ensure that the deduction or withholding does not exceed the
                minimum amount legally required;

         (b)    forthwith pay to the Beneficiaries such additional amount so
                that the net amount received by the Beneficiaries will equal the
                full amount which would have been received by it had no such
                deduction or withholding been made;

         (c)    pay to the relevant taxation or other authorities, within the
                period for payment required by applicable laws, the full amount
                of the deduction or withholding (including the full amount of
                any deduction or withholding from any additional amount paid
                pursuant to this Section); and

         (d)    furnish to the Beneficiaries promptly, as soon as available, an
                official receipt of the relevant taxation or other authorities
                involved for all amounts deducted or withheld as aforesaid.

7.5      NO WAIVER; REMEDIES

         No failure on the part of the Beneficiaries to exercise, and no delay
         in exercising, any right hereunder shall operate as a waiver thereof,
         nor shall any single or partial exercise of any right hereunder
         preclude the other or further exercise thereof or the exercise of any
         other right. The remedies herein provided are cumulative and not
         exclusive of any remedies provided by law.

7.6      SEVERABILITY

         If any provision of this Guarantee is determined to be invalid or
         unenforceable in whole or in part, such invalidity or unenforceability
         shall attach only to such provision or part thereof and the remaining
         part of such provision and all other provisions hereof shall continue
         in full force and effect.

7.7      AMENDMENTS AND WAIVERS

         Any provision of this Guarantee may be amended, waived or a consent
         given in respect thereof with the concurrence of the Guarantor and both
         the U.S. Agent and the U.K. Agent on behalf of the Beneficiaries. Any
         waiver and any consent by such Agents on behalf of the Beneficiaries
         under any provision of this Guarantee must be in writing signed by such
         Agents and may be given subject to any conditions thought fit by such
         Agents. Any waiver or consent shall be effective only in the instance
         and for the purpose for which it is given.

7.8      ADDITIONAL SECURITY

         This Guarantee is in addition and without prejudice to any security of
         any kind (including, without limitation, other guarantees) now or
         hereafter held by the Beneficiaries and any other rights or remedies
         they might have.



                                      -11-


7.9      NOTICES

         Any demand, notice or other communication (hereinafter in this Section
         referred to as a "Communication") to be given in connection with this
         Guarantee shall be given in writing and may be given by personal
         delivery, telecopier or by registered mail addressed to the recipient
         as follows:

         To the U.S. Agent on behalf of the Beneficiaries under the U.S.
         Facility:

                 Toronto Dominion (Texas) LLC
                 c/o The Toronto-Dominion Bank
                 Royal Trust Tower
                 77 King Street West, 18th Floor
                 Toronto, Ontario
                 M5K 1A2

                 Attention:        U.S. Agency Services
                 Telecopy No.:     (416) 307-3826

         with a copy to:

                 TD Securities
                 Corporate Credit
                 800, 324 - 8th Avenue S.W.
                 Calgary, Alberta
                 T2P 2Z2

                 Attention:        Vice President and Director
                 Telecopy No.:     (403) 292-2772

         To the U.K. Agent on behalf of the Beneficiaries under the U.K.
         Facility:

                 The Toronto-Dominion Bank, London Branch
                 c/o The Toronto-Dominion Bank
                 Royal Trust Tower
                 77 King Street West, 18th Floor
                 Toronto, Ontario
                 M5K 1A2

                 Attention:        U.K. Agency Services
                 Telecopy No.:     (416) 982-8619



                                      -12-


         with a copy to:

                 TD Securities
                 Corporate Credit
                 800, 324 - 8th Avenue S.W.
                 Calgary, Alberta
                 T2P 2Z2

                 Attention:        Vice President and Director
                 Telecopy No.:     (403) 292-2772


         To the Guarantor:

                  Nexen Inc.
                  2900, 801 - 7th Avenue S.W.
                  Calgary, Alberta
                  T2P 3P7

                  Telecopy No.:     (403) 232-0599
                  Attention:        Treasurer

         with a copy to the attention of the Senior Vice-President and General
         Counsel at the above address, telecopy no.: (403) 699-5743

         or such other address or telecopy number as may be designated by notice
         by any party to the other. Any Communication given by personal delivery
         or telecopier shall be conclusively deemed to have been given on the
         day of actual delivery or transmittal thereof and, if given by
         registered mail, on the third day following the deposit thereof in the
         mail. If the party giving any Communication knows or ought reasonably
         to know of any difficulties with the postal system which might affect
         the delivery of mail, any such Communication shall not be mailed but
         shall be given by personal delivery or telecopier.

7.10     ASSIGNMENT

         The rights of the Beneficiaries under this Guarantee may be assigned by
         the Beneficiaries in accordance with the provisions of the Credit
         Agreement and without the consent of the Obligors or either of them, as
         the case may be, or the Guarantor during the continuance of an Event of
         Default and, at all other times, with the prior written consent of the
         Guarantor (such consent not to be unreasonably withheld). Except in
         connection with the transactions permitted by Section 10.2(d) of the
         Credit Agreement, the Guarantor may not assign its obligations under
         this Guarantee.



                                      -13-


7.11     TIME OF ESSENCE

         Time is of the essence with respect to this Guarantee and the time for
         performance of the obligations of the Guarantor under this Guarantee
         may be strictly enforced by the Beneficiaries.

7.12     FINANCIAL CONDITION OF THE OBLIGORS

         The Guarantor is fully aware of the financial condition of each of the
         Obligors and acknowledges that it shall receive a benefit from the
         Beneficiaries entering into the Documents to which the Beneficiaries
         are a party. The Guarantor assumes all responsibility for being and
         keeping itself informed of each of the Obligors' financial condition
         and assets, and of all other circumstances bearing upon the risk of
         non-payment or non-performance of the Obligations and the nature, scope
         and extent of the risks which Guarantor assumes and incurs hereunder,
         and agrees that the Beneficiaries shall not have a duty to advise
         Guarantor of information known to any of them regarding such
         circumstances or risks.

7.13     ACKNOWLEDGEMENT OF DOCUMENTATION

         The Guarantor hereby acknowledges receipt of a true and complete copy
         of the Documents and all of the terms and conditions thereof.

7.14     ENTIRE AGREEMENT

         This Guarantee and the Documents constitute the entire agreement
         between the Beneficiaries and the Guarantor with respect to the subject
         matter hereof and cancel and supersede any prior understandings and
         agreements between such parties with respect thereto. There are no
         representations, warranties, terms, conditions, undertakings or
         collateral agreements, expressed, implied or statutory, between such
         parties other than as expressly set forth herein or therein.

7.15     GOVERNING LAW

         This Guarantee shall be governed by and construed in accordance with
         the laws of the Province of Alberta and the federal laws of Canada
         applicable therein.

7.16     ATTORNMENT

         The Guarantor and each of the Beneficiaries hereby attorn and submit to
         the jurisdiction of the courts of the Province of Alberta in regard to
         legal proceedings relating to this Guarantee. For the purpose of all
         such legal proceedings, the courts of the Province of Alberta shall
         have jurisdiction to entertain any action arising under this Guarantee.
         Notwithstanding the foregoing, nothing in this Section shall be
         construed nor operate to limit the right of the Guarantor or the
         Beneficiaries to commence any action relating hereto in any other
         jurisdiction, nor to limit the right of the courts of any other
         jurisdiction to take jurisdiction over any action or matter relating
         hereto.


                                      -14-


         IN WITNESS WHEREOF the Guarantor has executed this Guarantee.


                                         NEXEN INC.


                                         Per: /s/ Marvin F. Romanow
                                              ----------------------------
                                              Name:  Marvin F. Romanow
                                              Title: Executive Vice President
                                                     and Chief Financial Officer



                                         Per: /s/ Una Power
                                              ----------------------------
                                              Name:  Una Power
                                              Title: Treasurer