Penn West Energy Trust and Vault Energy Trust Announce Vault Unitholder and Court Approval of Acquisition



    CALGARY, Jan. 9 /CNW/ - (TSX - PWT.UN; NYSE - PWE) Penn West Energy Trust
("Penn West") and (VNG.UN - TSX) Vault Energy Trust ("Vault") are pleased to
announce that the plan of arrangement (the "Arrangement") related to the
acquisition of Vault by Penn West was approved today at the Special Meeting of
Vault Unitholders, Vault Exchangeable Shareholders and Vault Warrantholders
with 94.6 percent of the votes cast in favour of the Arrangement. The Alberta
Court of Queen's Bench has also granted the final order required in connection
with the Arrangement. Subject to the satisfaction of other standard closing
conditions, the acquisition is expected to be effective on or about
January 10, 2008.
    Pursuant to the Arrangement, Vault Unitholders will receive 0.14 of a
Penn West trust unit for each Vault trust unit exchanged, Vault Exchangeable
Shareholders will receive 0.14 of a Penn West trust unit for each Vault trust
unit in to which the Vault Exchangeable Shares held by such holders are
exchangeable, and Vault warrantholders will receive cash consideration of
$0.51 for each Vault warrant exchanged.
    The acquisition is expected to be accretive to Penn West's Unitholders on
a production, cash flow and reserves basis. The transaction is expected to add
current production of approximately 6,200 barrels of oil equivalent per day,
weighted approximately 65 percent to natural gas and 35 percent to light oil
and natural gas liquids. It is also expected to increase Penn West's tax pool
position by approximately $480 million. Vault's Alberta properties include
Wimborne, Bigoray, Pembina, Crystal and Westerose, all of which are
strategically located at or near some of Penn West's central area core light
oil properties. Additionally, Vault's significant natural gas properties in
northeast British Columbia and northwest Alberta complement existing Penn West
properties. In connection with the acquisition, Penn West will also add
approximately 120,000 net undeveloped acres to its land base.

    Penn West Energy Trust is a senior oil and natural gas energy trust based
in Calgary, Alberta that trades on the Toronto Stock Exchange under the symbol
PWT.UN and on the New York Stock Exchange under the symbol PWE.

    Vault Energy Trust is an oil and natural gas energy trust based in
Calgary, Alberta that trades on the Toronto Stock Exchange under the symbol
VNG.UN.

    Forward-looking Statements

    Certain information regarding Penn West Energy Trust and Vault Energy
Trust, including the completion and timing of completion of the acquisition of
Vault, the benefits that Penn West and Penn West unitholders will derive from
the acquisition of Vault, and the attributes of Vault's assets may constitute
forward-looking statements under applicable securities law and necessarily
involve risks, including, without limitation, risks associated with oil and
gas exploration, development, exploitation, production, marketing and
transportation, loss of markets, volatility of commodity prices, currency
fluctuations, imprecision of reserve estimates, environmental risks,
competition, failure to realize the anticipated benefits of the acquisition,
ability to access sufficient capital from internal and external sources;
failure to obtain required regulatory approvals, changes in legislation,
including but not limited to tax laws and environmental regulations. As a
consequence, actual results may differ materially from those anticipated in
the forward-looking statements. Readers are cautioned that the foregoing list
of factors is not exhaustive. Additional information on these and other
factors that could affect Penn West's and Vault's operations or financial
results are included in reports on file with applicable securities regulatory
authorities and may be accessed through the SEDAR website (www.sedar.com), the
SEC's website (www.sec.gov) or at Penn West's website (www.pennwest.com).
    The forward-looking statements contained in this document speak only as
of the date of this document. Except as expressly required by applicable
securities laws, neither Penn West nor Vault undertakes any obligation to
publicly update or revise any forward-looking statements, whether as a result
of new information, future events or otherwise. The forward-looking statements
contained in this document are expressly qualified by this cautionary
statement.

    %SEDAR: 00022266E          %CIK: 0001334388




For further information:

For further information: PENN WEST ENERGY TRUST: Suite 2200, 425 - First
Street S.W., Calgary, Alberta, T2P 3L8, Phone: (403) 777-2500, Toll-free:
1-866-693-2707, Fax: (403) 777-2699, Website: www.pennwest.com; Investor
Relations: Phone: 1-888-770-2633, E-mail: investor_relations@pennwest.com;
VAULT ENERGY TRUST: Robert Jepson, President and Chief Executive Officer,
(403) 444-9662 or Greg Fisher, VP, Finance and Chief Financial Officer, (403)
444-9651, E-mail: info@vaultenergy.com, Website: www.vaultenergy.com


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