Document:

<Page>

EXHIBIT 4.6

                           ESCROW AMENDMENT AGREEMENT

THIS AMENDING AGREEMENT dated as of the ________________ day of September, 2001,

AMONG:

        PACIFIC CORPORATE TRUST COMPANY, 625 Howe Street, 10th Floor,
        Vancouver, British Columbia, V6C 3B8

        (the "Escrow Agent")

AND:

        ENERGAS RESOURCES INC., a corporation subsisting under the laws of
        British Columbia, having its registered office at 1500 - 1055 West
        Georgia Street, Vancouver, British Columbia  V6E 4N7

        (the "Issuer")

AND:

        ENERGAS CORPORATION, a corporation subsisting under the laws of
        Oklahoma;

AND:

        ENERGAS PIPELINE COMPANY, a corporation subsisting under the laws of
        Oklahoma;

        (Energas Corporation and Energas Pipeline Company collectively the
        "Shareholders")

WHEREAS:

A.      The Escrow Agent, the Issuer and the Shareholders entered into an
escrow agreement dated September 20, 1991, as amended April 13, 1994 (the
"Escrow Agreement");

B.      Pursuant to the Escrow Agreement, there are 5,800,000 escrow shares
(the "Shares") held in escrow by the Escrow Agent, none of which have been
released;

C.      The Issuer is a Tier 2 Issuer as defined in Policy 2.1 of the
Exchange (hereinafter defined); and

D.      The parties now wish to amend the Escrow Agreement to reflect release
terms included in the proposed uniform escrow regime policy outlined in CSA
Notice 46-301 - Proposal for Uniform Terms of Escrow Application to Initial
Public Distributions and the Exchange Policy

<Page>

                                        -2-

5.4 - Escrow and Vendor Consideration as amended by the Bulletin dated June
15, 2001 (the "Exchange Escrow Policy");

NOW THEREFORE in consideration of the covenants contained in this Agreement
and other good and valuable consideration (the receipt and sufficiency of
which is acknowledged), the Parties agree as follows:

1.      In Section 1 of the Escrow Agreement:

        (a)     In subparagraph (a) the definition of "Exchange" is amended
                to read "shall mean the Canadian Venture Exchange";

2.      Section 3 shall be deleted and the following subsections added to
        Section 3:

                "3.0   Shares will be released from escrow under this Agreement
                as set out in Schedule B;

                3.1    If a Shareholder wishes to receive a certificate
                evidencing Shares released or to be released from escrow on a
                release date set out in Schedule B, the Shareholder will
                provide written notice to the Escrow Agent to that effect. If
                the Escrow Agent receives notice from a Shareholder that the
                Shareholder wishes to receive certificates for released
                Shares, the Escrow Agent will, as soon as reasonably
                practicable after the applicable release date or after receipt
                by the Escrow Agent of the notice from the Shareholder,
                whichever is later, deliver to or at the direction of the
                Shareholder, certificates evidencing the Shares released from
                escrow on the applicable release date.

                3.2    Where a Shareholder has, in accordance with section 3.1
                provided notice to the Escrow Agent that the Shareholder
                wishes to receive a certificate evidencing Shares released or
                to be released from escrow, and where the relevant certificate
                held by the Escrow Agent evidences a combination of Shares
                released from escrow on the applicable release date and Shares
                that are to remain in escrow, the Escrow Agent, as soon as
                reasonably practicable after the release date or after receipt
                by the Escrow Agent of the notice from the Shareholder,
                whichever is later, shall deliver such certificates to the
                Issuer or its transfer agent, together with a request that
                separate replacement certificates be prepared and delivered to
                the Escrow Agent. Where certificates evidencing Shares are
                delivered to the Issuer in accordance with the foregoing, the
                Issuer, as soon as reasonably practicable, shall cause
                separate replacement certificates to be prepared and delivered
                to the Escrow Agent. As soon as reasonably practicable after
                the receipt by the Escrow Agent of the replacement
                certificates, the Escrow Agent shall deliver, to or at the
                direction of the Shareholder, all replacement certificates
                evidencing Shares released from escrow on the applicable
                release date;

                3.3 If the Escrow Agent receives a request from the Exchange to
                halt or terminate the release of Shares from escrow, then the
                Escrow Agent shall comply with that request, and shall not
                release any Shares from escrow unless and until the written
                consent of the Exchange is received; and

<Page>

                                        -3-

                3.4   The Exchange may consent to the release from escrow of
                Shares in such other circumstances and on such terms and
                conditions as it shall determine in its sole discretion.
                Shares may be released from escrow provided that the Escrow
                Agent receives written notice from the Exchange."

3.      Section 10 and sections 12 through 17 inclusive of the Escrow
Agreement shall be deleted, and the remaining sections of the Escrow Agreement
are renumbered accordingly.

4.      Except as amended herein, the Escrow Agreement as amended by this
Amendment to Escrow Agreement shall continue in full force and effect.

IN WITNESS WHEREOF the Parties have caused this Agreement to be duly executed.

PACIFIC CORPORATE TRUST COMPANY

Per:    ____________________________________
        Authorized Signatory

ENERGAS RESOURCES INC.

Per:    ____________________________________
        Authorized Signatory

ENERGAS CORPORATION

Per:    ____________________________________
        Authorized Signatory

ENERGAS PIPELINE COMPANY

Per:    ____________________________________
        Authorized Signatory

<Page>

                                   SCHEDULE B

                                RELEASE OF SHARES
TIMED RELEASE

<Table>
<Caption>
_________________________________________________________________________________________
                     PERCENTAGE OF TOTAL ESCROWED            TOTAL NUMBER OF ESCROWED
RELEASE DATES      SHARES TO BE RELEASED (PRO RATA)      SHARES TO BE RELEASED (PRO RATA)
_________________________________________________________________________________________
<S>                <C>                                   <C>
March 21, 2002                    5%                                  290,000
_________________________________________________________________________________________
September 21, 2002                5%                                  290,000
_________________________________________________________________________________________
March 21, 2003                    5%                                  290,000
_________________________________________________________________________________________
September 21, 2003                5%                                  290,000
_________________________________________________________________________________________
March 21, 2004                   10%                                  580,000
_________________________________________________________________________________________
September 21, 2004               10%                                  580,000
_________________________________________________________________________________________
March 21, 2005                   10%                                  580,000
_________________________________________________________________________________________
September 21, 2005               10%                                  580,000
_________________________________________________________________________________________
March 21, 2006                   10%                                  580,000
_________________________________________________________________________________________
September 21, 2006               10%                                  580,000
_________________________________________________________________________________________
March 21, 2007                   10%                                  580,000
_________________________________________________________________________________________
September 21, 2007               10%                                  580,000
_________________________________________________________________________________________
</Table><Page>

EXHIBIT 4.7
-----------
                                ESCROW AGREEMENT
                                ----------------

THIS AGREEMENT made this 20th day of September, 1991.
BETWEEN:
                  PACIFIC CORPORATE TRUST COMPANY
                  -------------------------------
                  #830 - 625 Howe Street
                  Vancouver, B. C.

                  (hereinafter called the "Trustee")

                                                               OF THE FIRST PART
AND:
                  TRIDON OIL & GAS LTD.
                  ---------------------
                  a company duly incorporated under the laws
                  of the Province of British Columbia
                  and having its registered and records
                  office at #1750 - 750 West Pender Street,
                  Vancouver, British Columbia

                  (hereinafter called the "Company")

                                                              OF THE SECOND PART
AND:

                  THE UNDERSIGNED SHAREHOLDERS
                  ----------------------------
                  IN TRIDON OIL & GAS LTD.

                  (hereinafter individually called
                  "Shareholder and collectively
                  called the "Shareholders")

                                                               OF THE THIRD PART

WHEREAS:

A.         The Company has agreed to issue 18,000,000 shares of its capital
stock to the Shareholders (the "Shares"):

B.         The Shareholders have agreed to enter into this Escrow Agreement
on the terms and conditions hereinafter set forth.

C.         The Company agrees to employ its best efforts to ensure that the
terms and conditions of this agreement are complied with.

<Page>

D.         The Trustee has agreed to undertake and perform its duties
according to the terms and conditions of this agreement.

           NOW THEREFORE THIS AGREEMENT WITNESSETH that in
consideration of the aforesaid agreements, the mutual covenants and
conditions herein contained and other good and valuable consideration, the
Shareholders jointly and severally covenant and agree with the Company and
the Company and the Trustee covenant and agree with the other and with the
Shareholders jointly and severally as follows:

1.         In this Agreement:

           (a)      "Exchange" shall mean the Vancouver Stock Exchange:

           (b)      "lost or alienated" shall mean that circumstance
                    where the Company has lost, alienated or has not
                    obtained a good or marketable title to the Asset or
                    that any or all of the Asset has become of little
                    or-no value;

           (c)      "Shares" shall mean the shares of the Shareholders
                    set opposite their names in Schedule "A" attached
                    hereto, together with any additional shares issued by
                    way of a dividend paid in shares, which accrues to
                    the Shares, and shall be deemed to refer to the
                    certificate or certificates representing such shares;

           (d)      "Property or Asset" shall mean the assets held by and
                    the business carried on by the Company from time to
                    time;

           (e)      "Superintendent" shall mean the Superintendent of
                    Brokers of the Province of British Columbia or any
                    Deputy Superintendent of Brokers of the Province of
                    British Columbia, or any duly authorized person
                    performing his duties under the SECURITIES ACT of the
                    Province of British Columbia as from time to time
                    amended;

           (f)      "Superintendent or Exchange" means the
                    Superintendent, if the shares of the Company are not
                    listed on the Exchange, or the Exchange if the shares
                    of the Company are listed on the Exchange.

2.         The Shareholders hereby place and deposit in escrow with the
Trustee the number of Shares of the Company set forth opposite their name in
Schedule "A" attached hereto.

3.         The Shares shall be released from the escrow hereby created on the
basis of cash flow as derived from audited financial statements. "Cash flow"
means the net income before tax from the operations of the Company on an
annual basis, commencing on the last day of the month in which the
Superintendent has issued a receipt for the Company's prospectus, as adjusted
for the following add -backs, plus any other capitalization changes as may be
r-required from the Superintendent or the Exchange:

           (a)      depreciation;
           (b)      depletion;
           (c)      any amortization for goodwill, licenses, or other
                    deferred charges; and
           (d)      any amortization of development costs.

         Releases of shares from escrow shall be made on the basis$ of cash flow
as disclosed in audited financial statements, Cumulative cash flow is to be
determined by cumulating cash flow for any 12 consecutive month period, or
multiple thereof commencing before, in or after the month in which the shares
are issued. The number of shares releasable from escrow in that year or multiple
thereof will be computed by dividing by $ 0.15 the cumulative cash flow for the
aforementioned period.

<Page>

4.         Until such time as the Shares are released from the escrow hereby
created pursuant to the terms and conditions of this agreement, the parties
hereby agree that the Shares and the beneficial ownership of or any interest
in them shall not be sold, assigned, hypothecated, alienated, released from
escrow, transferred within escrow, or otherwise in any manner dealt with
except as may be required by reason of the death or bankruptcy of the
Shareholders, in which case the Trustee shall hold the Shares subject to this
agreement, for whatever person, firm, Dr corporation shall be legally
entitled to be or become the registered owner thereof, or by other due
process of law.

5.         Until such time as the Shares are released from the escrow hereby
created pursuant to the terms and conditions of this agreement, the
Shareholders hereby direct the Trustee to retain their Shares, and not to do
or cause anything to be done to release the same from escrow or to allow any
transfer, hypothecation, or alienation thereof. The Trustee hereby accepts
the responsibilities placed on it hereby and agrees to perform the same in
accordance with the terms hereof and in accordance with any order or
direction of the Superintendent or Exchange, subject only to any right of
appeal against any such order or direction as referred to herein.

6.         If, during the period in which any of the Shares are retained in
escrow pursuant hereto, any dividend, other than a dividend paid in shares of
the Company, is received by the Trustee in respect of the Shares, such
dividend shall be paid or transferred forthwith to the Shareholders pro rata.
Any shares received by the Trustee by way of dividend in respect of the
Shares shall be dealt with as if they were Shares hereunder.

7.         All voting rights attached to the Shares may at all times be
exercised by the registered owners thereof.

8.         The Company hereby acknowledges the terms and conditions of this
agreement and agrees to take all reasonable steps to facilitate its
performance.

9.         The release from escrow of any of the Shares pursuant to the terms
of this agreement shall terminate this agreement only in respect to those
Shares so released. For greater certainty this clause does not apply to
Shares transferred within escrow.

10.        Any shares not released from the escrow hereby created before the
expiration of ten (10) years from the date hereof shall be cancelled
forthwith and the Company and the Trustee hereby agree to take all such
actions as may be necessary to expeditiously effect such cancellation.

11.        In the event that the Company has lost or alienated the Shares,
the Company and the Shareholders have the express obligation and hereby agree
to declare any such event or circumstances and the particulars thereof to the
Superintendent or Exchange.

12.        In the event that the Company has at any time hereafter lost or
alienated the Property or Assets the Company, any director of the Company,
the Shareholders or any shareholder or group of shareholders of the Company
holding in the aggregate not less than 5% of the issued and outstanding
common shares of the Company may, by notice in writing directed to the
Superintendent or Exchange, request that the Superintendent or Exchange order
or direct that the Shares remaining in escrow hereunder be cancelled.

13.        Upon the Superintendent or Exchange being advised of the loss or
alienation of the Property or Assets pursuant to paragraph 11 or upon
receiving a notice in writing pursuant to paragraph 12, it may, at its
discretion, make such order or direction for the cancellation of the Shares
as it seems advisable, and the Company and the Shareholders hereby agree,
subject to paragraph 17 to be bound by such order and to take all such
actions as may be necessary to expeditiously carry out such order.

14.        Upon the Trustee being advised of an order or direction under
paragraph 13, the Trustee subject to paragraph 16 hereof, shall cancel such
Shares as the Superintendent or Exchange has ordered or directed.

<Page>

15.        Upon receipt of any order or direction of the Superintendent or
Exchange pursuant to paragraph 14 hereof and subject as herein provided, the
Shareholders hereby irrevocably appoint the Trustee their attorney for the
purpose of canceling, selling, assigning, or transferring any portion of the
Shares and for the purpose of executing any necessary acts of assignment or
transfer, and with authority to substitute one or more persons with like full
power.

16.        Upon receipt by the Trustee of any order or direction for the
cancellation of any of the Shares, the Trustee shall forthwith advise the
Shareholders and shall not take any steps to cancel such Shares for ninety
(90) days from receipt of the order or direction. The Company or the
Shareholders shall have the right to appeal the decision of the
Superintendent or Exchange as if it were a decision of the Superintendent in
accordance with the provisions of the SECURITIES ACT of the Province of
British Columbia.

17.        Notice of any order or direction of the Superintendent or Exchange
shall be given by the Trustee to all persons or parties affected thereby at
their last known registered address.

18.        The-parties hereto agree that in consideration of the premises and
of the Trustee agreeing to act in such capacity, the Shareholders and the
Company do hereby jointly and severally covenant and agree from time to time
and at all times hereafter well and truly to save, defend and keep harmless
and ful1y indemnify the Trustee. its successors and assigns, from and against
all loss, costs, charges, suits, demands, claims, damages and expenses which
the Trustee, its successors or assigns, may at any time or times hereafter
bear, sustain, suffer or be put unto for or by reason or on account of its
acting as Trustee or anything in any manner relating thereto or by reason of
the Trustee's compliance in good faith with the terms hereof.

19.        It is further agreed by and between the parties hereto, and
without restricting the foregoing indemnity, that in case proceedings should
hereafter be taken in any Court respecting the Shares, the Trustee shall not
be obliged to defend any such action or submit its rights to the Court until
it shall have been indemnified by other good and sufficient security in
addition to the indemnity hereinbefore given against its cost of such
proceedings.

20.        This agreement may be executed in several parts in the same
form and such parts as so executed shall together form one original agreement,
and such parts, if more than one, shall be read together and construed as if all
the signing parties hereto had executed one copy of this agreement.

21.        Wherever the singular or masculine are used throughout this
agreement, the same shall be construed as being the plural or feminine or
neuter where the context so requires.

22.        This agreement shall inure to the benefit of and be binding upon
the parties hereto, their and each of their heirs, executors, administrators,
successors and permitted assigns.

           IN WITNESS WHEREOF the parties hereto have executed these presents
the day and year first above written. The Common Seal of PACIFIC CORPORATE
TRUST COMPANY was hereunto affixed in the presence of:

The Common Seal of TRIDON OIL
& GAS LTD. was hereunto
affixed in the presence of:

/s/ OWEN RICHMAN
------------------------------------

The Common Seal of ENERGAS
CORPORATION was hereunto
affixed in the presence of:

/s/ GEORGE SHAW
------------------------------------

<Page>

                                  SCHEDULE "A"
                                  ------------

<Table>
<Caption>

1.             NAME OF SHAREHOLDER                   NUMBER OF SHARES
               -------------------                   ----------------
<S>            <C>                                   <C>
               Energas Corporation                      14,112,000
               3750 West Main Street
               Norman, Oklahoma  73072
               Energas Pipeline Company                  3,888,000
               3750 West Main Street
               Norman, Oklahoma  73072

               TOTAL:                                   18,000,000

</Table>

NOTE:   A further 633,353 shares of the Company will be added to the total of
shares held in escrow pursuant to the terms of this Agreement for the account
of Energas Corporation should the Company exercise its option to acquire a
further undivided 2% working interest from Energas Corporation by the
agreement to which this agreement is attached as Schedule "B".

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00030-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00030-of-00352.parquet"}]]