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                                                                    EXHIBIT 10.2

                              ARTICLES OF MERGER

The undersigned domestic and foreign corporations, which are parties to a merger
pursuant to the provisions of Section 7-111-107 of the Colorado Business
Corporation Act (the "COLORADO STATUTE") and Section 17-16-1101 of the Wyoming
Business Corporation Act (the "WYOMING STATUTE") (hereinafter, the Colorado
Statute and the Wyoming Statute may be referred to collectively as the
"GOVERNING STATUTES" and each individually as a "GOVERNING STATUTE"), hereby
submit the following Articles of Merger pursuant to the provisions of Section 7-
111-105 of the Colorado Statute and Section 17-16-1105 of the Wyoming Statute,
and certify as follows.

1.  Plan of Merger.  Pursuant to a certain Plan of Merger and Reorganization
dated July 16, 2001, a copy of which is attached hereto as Exhibit "A" and
incorporated herein (the "PLAN"), Ultra Petroleum (USA) Inc., a Colorado
corporation ("USA"), shall be merged with and into Ultra Resources, Inc., a
Wyoming corporation ("RESOURCES" and, together with USA, the "MERGER PARTIES").
There are no other parties to such merger (the "MERGER").

2.  Approval of the Plan of Merger by USA.

(a)  The designation, number of outstanding shares, and number of votes entitled
to be cast by each voting group of USA entitled to vote separately on the
Plan are as follows:

                               # of Shares         # of Votes
Designation                    Outstanding     Entitled to Be Cast
----------------------------   -----------     -------------------

     Common, no par value      100,000         100,000
     per share

(b)  The total number of votes cast for or against the Plan by each voting group
of USA entitled to vote separately on the Plan is as follows:

                                # of Votes        # of Votes
Voting Group                   Cast for Plan   Cast Against Plan
----------------------------   -------------   -----------------

     Common, no par value      100,000         0
     per share

(c)  The number of votes cast for the Plan by each voting group of USA entitled
to vote separately on the merger was sufficient for approval by that voting
group.

3.      Approval of the Plan of Merger by Resources.

(a)  The designation, number of outstanding shares, and number of votes entitled
to be cast by each voting group of Resources entitled to vote separately on
the Plan are as follows:

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                               # of Shares         # of Votes
Designation                    Outstanding     Entitled to Be Cast
----------------------------   -----------     -------------------

     Common, no par value      100,000         100,000
     per share

(b)  The total number of votes cast for or against the Plan by each voting group
of Resources entitled to vote separately on the Plan is as follows:

                                # of Votes        # of Votes
Voting Group                   Cast for Plan   Cast Against Plan
----------------------------   -------------   -----------------

     Common, no par value      100,000         0
     per share

(c)  The number of votes cast for the Plan by each voting group of Resources
entitled to vote separately on the merger was sufficient for approval by
that voting group.

4.  Address of Principal Office of Surviving Corporation.  The address of the
principal office of Resources is located at 16801 Greenspoint Park Drive, Suite
370, Houston, Texas 77060.

5.  Authority to Transact Business in Colorado; Registered Agent.  On September
3, 1998, Resources filed in the office of the Secretary of State of Colorado its
Application for Authority (as amended from time to time, the "APPLICATION") to
transact business in the State of Colorado under the assumed entity name "Ultra
Petroleum (Wyoming), Inc."  The registered agent of Resources in the State of
Colorado designated in the Application (or in the most recent statement of
change of registered agent filed from time to time in the office of the
Secretary of State of Colorado with respect thereto, if any), is authorized to
accept service of process on Resources in the State of Colorado in connection
with any proceeding to enforce any obligation or rights of dissenting
shareholders of USA, or any proceeding based on a cause of action arising with
respect to USA.  In accordance with Section 7-111-107(2) of the Colorado
Statute, if Resources fails to maintain a registered agent in the State of
Colorado, Resources shall be deemed to have authorized service of process on it
in connection with any such proceeding by registered or certified mail, return
receipt requested, to the address of its principal office specified in Paragraph
4, above, or as last changed by notice delivered to the Secretary of State of
Colorado for filing.

6.  Effective Time. The Merger shall become effective upon the later of 11:59
p.m., Denver, Colorado time, on July 16, 2001, or the first date on which the
Secretaries of State of Colorado and Wyoming have issued certificates of merger
to each Merger Party with respect to the Merger (the "EFFECTIVE TIME").

                  -Remainder of Page Intentionally Left Blank-

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IN WITNESS WHEREOF, the undersigned, by their duly authorized representatives,
have executed these Articles of Merger as of the 16th day of July, 2001.

                                                SURVIVING COMPANY:

                                                ULTRA RESOURCES, INC.

                                                By: /s/ Michael D. Watford
                                                    ---------------------------
                                                Michael D. Watford,
                                                President

                                                MERGING COMPANY:

                                                ULTRA PETROLEUM (USA) INC.

                                                By: /s/ Michael D. Watford
                                                    ---------------------------
                                                Michael D. Watford,
                                                President

                                       3<PAGE>

                                                                    EXHIBIT 10.3

                       PLAN OF MERGER AND REORGANIZATION

Pursuant to the provisions of Section 7-111-107 of the Colorado Business
Corporation Act (the "COLORADO STATUTE") and Section 17-16-1101 of the Wyoming
Business Corporation Act (the "WYOMING STATUTE") (hereinafter, the Colorado
Statute and the Wyoming Statute may be referred to collectively as the
"GOVERNING STATUTES" and each individually as a "GOVERNING STATUTE"), the
undersigned merging entities and certain related parties have adopted the
following Plan of Merger and Reorganization (the "PLAN") for the purpose of
effecting a merger in accordance with the Governing Statutes, and for the
purpose of effecting certain other transactions.

WHEREAS, Ultra Petroleum Corp., a Yukon corporation ("ULTRA"), acquired all of
the outstanding capital stock of Pendaries Petroleum, Ltd., a New Brunswick
corporation ("PENDARIES"), in a stock-for-stock exchange pursuant to a plan of
arrangement that became effective on January 16, 2001 pursuant to a certificate
of arrangement issued by the Director of the Corporate Affairs Branch, New
Brunswick Department of Justice (the "DIRECTOR"); and

WHEREAS, after its obligations were paid or discharged, or adequate provision
was made therefor, Pendaries distributed its remaining assets, including all of
the outstanding capital stock of Sino-American Energy Corporation, a Texas
corporation ("SINO-AMERICAN"), to Ultra, and filed articles of dissolution in
the office of the Director on July 16, 2001; and

WHEREAS, Ultra now owns all of the outstanding capital stock of three (3)
operating U.S. subsidiaries: (i) Ultra Resources, Inc., a Wyoming corporation
("RESOURCES"); (ii) Ultra Petroleum (USA) Inc., a Colorado corporation ("USA");
and (iii) Sino-American; and

WHEREAS, upon the terms and conditions set forth herein, the parties to this
Plan desire: (i) that USA merge with and into Resources (the "MERGER"), so that
Resources is the surviving corporation; and (ii) thereafter, on or before July
16, 2001, that Ultra contribute all of the outstanding shares of capital stock
of Resources and Sino-American to the capital of UP Energy Corporation, a newly-
formed Nevada corporation incorporated on July 11, 2001 ("U.S. HOLDINGS"),
solely in exchange for shares of common stock of U.S. Holdings (the "CAPITAL
CONTRIBUTION"); and

WHEREAS, following the Merger and the Capital Contribution, the parties to this
Plan desire that U.S. Holdings, Resources and Sino-American enter into a tax
sharing agreement for the purpose of filing consolidated returns for U.S.
federal income tax purposes pursuant to Section 1501 of the U.S. Internal
Revenue Code of 1986, as amended (the "CODE");

NOW, THEREFORE, in consideration of the premises and other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the
undersigned parties agree as follows with the intent to be legally bound by this
Plan:

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1.  Merger.

(a)  Names of Parties.  USA (a/k/a "Ultra Petroleum (USA) Inc.," a Colorado
     corporation) is planning to merge with and into Resources (a/k/a "Ultra
     Resources, Inc.," a Wyoming corporation), so that Resources is the
     surviving corporation.

(b)  Merger Effective Time.  The "MERGER EFFECTIVE TIME" shall be the later of
     11:59 p.m., Denver, Colorado time, on July 16, 2001, or the first date on
     which the Secretaries of State of Colorado and Wyoming have issued
     certificates of merger to USA and Resources with respect to this Plan.

(c)  Terms and Conditions.  At the Merger Effective Time, USA shall be merged
     with and into Resources, the separate existence of USA shall cease, and
     Resources shall continue as the sole surviving corporation.  USA and
     Resources shall cause the Merger to be consummated in accordance with the
     Governing Statutes by filing the Articles of Merger in the form attached as
     Exhibit "A" (the "ARTICLES OF MERGER") with the Secretaries of State of
     Colorado and Wyoming on or before the date of the Merger Effective Time.
     The effect of the Merger shall be as provided under the Governing Statutes.

(d)  Conversion of Shares.  At the Merger Effective Time, each share of capital
     stock of USA issued and outstanding immediately prior to the Merger
     Effective Time shall be canceled and extinguished without any conversion
     thereof.  Each share of capital stock of Resources issued and outstanding
     immediately prior to the Merger Effective Time shall remain issued and
     outstanding, and shall not be affected by the Merger.

(e)  Articles of Incorporation; Bylaws.  No amendments to the Articles of
     Incorporation or bylaws of Resources shall be effected by the Merger.

(f)  Directors and Officers.  At and after the Merger Effective Time, the
     directors and officers of Resources immediately prior to the Merger
     Effective Time shall remain all of the directors and officers of Resources,
     each to hold office in accordance with the Articles of Incorporation and
     bylaws of Resources.

(g)  Appraisal or Dissenting Shareholders' Rights.  Each shareholder of USA and
     Resources has acknowledged receipt of notice of such shareholder's
     appraisal or dissenting shareholders' rights with respect to the Merger
     under Article 113 of the Colorado Statute or Article 13 of the Wyoming
     Statute, as applicable, and has waived any and all such rights by executing
     a unanimous written consent adopting and approving this Plan and the
     Merger.

(h)  Fees and Franchise Taxes.  Upon the Merger, Resources will assume all
     liability and be responsible for the payment of all fees and franchise
     taxes owed by USA.

(i)  Authority to Transact Business in Colorado; Registered Agent.  On September
     3, 1998, Resources filed in the office of the Secretary of State of
     Colorado its Application for Authority

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     (as amended from time to time, the "APPLICATION") to transact business in
     the State of Colorado under the assumed entity name "Ultra Petroleum
     (Wyoming), Inc." The registered agent of Resources in the State of Colorado
     designated in the Application (or in the most recent statement of change of
     registered agent filed from time to time in the office of the Secretary of
     State of Colorado with respect thereto, if any), is authorized to accept
     service of process on Resources in the State of Colorado in connection with
     any proceeding to enforce any obligation or rights of dissenting
     shareholders of USA, or any proceeding based on a cause of action arising
     with respect to USA. In accordance with Section 7-111-107(2) of the
     Colorado Statute, if Resources fails to maintain a registered agent in the
     State of Colorado, Resources shall be deemed to have authorized service of
     process on it in connection with any such proceeding by registered or
     certified mail, return receipt requested, to the address of its principal
     office specified in Paragraph 4 of the Articles of Merger, or as last
     changed by notice delivered to the Secretary of State of Colorado for
     filing.

(j)  Tax Consequences of Merger.  The Merger is intended to qualify as a
     "reorganization" under Section 368 of the Code.

2.  Capital Contribution.  Immediately after the Merger Effective Time, (i)
Ultra shall transfer and assign all of its rights, title and interests in and to
all of the outstanding shares of capital stock of Resources and Sino-American to
US Holdings by delivering to US Holdings the stock certificates representing
such shares, endorsed in blank or accompanied by duly executed assignment
documents.

3.  Tax Sharing Agreement.  Following the Merger and the Capital Contribution,
U.S. Holdings, Resources and Sino-American shall enter into a tax sharing
agreement, in form and substance satisfactory to each of them (which shall be
conclusively evidenced by the execution and delivery of such agreement in the
name of and on behalf of such entity by its President or other duly authorized
representative), for the purpose of filing consolidated returns for U.S. federal
income tax purposes pursuant to Section 1501 of the Code.

4.  Descriptive Headings; Section References.  The descriptive headings of the
several sections, subsections and clauses of this Plan were inserted for
convenience only and shall not be deemed to affect the meaning or construction
of any of the provisions hereof.  Unless the context clearly provides otherwise,
all references herein to sections, subsections or paragraphs shall refer to
sections, subsections and paragraphs of this Plan.

5.  Counterparts.  This Plan may be executed in any number of counterparts, and
each counterpart shall be deemed to be an original instrument, but all such
counterparts shall constitute but one plan.

                  -Remainder of Page Intentionally Left Blank-

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IN WITNESS WHEREOF, the undersigned, by their duly authorized representatives,
have executed this Plan as of the 16th day of July, 2001.

ULTRA PETROLEUM CORP.             SINO-AMERICAN ENERGY CORPORATION

By: /s/ Michael D. Watford          By: /s/ Michael D. Watford
    ----------------------------        --------------------------
     Michael D. Watford,                 Michael D. Watford,
     President, Chairman and CEO         President

ULTRA RESOURCES, INC.               ULTRA PETROLEUM (USA) INC.

By: /s/ Michael D. Watford          By: /s/ Michael D. Watford
   ---------------------------         ----------------------------
     Michael D. Watford,                 Michael D. Watford,
     President                           President

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