Penn West amends information in its third quarter press release



    CALGARY, Nov. 14 /CNW/ - (TSX - PWT.UN; NYSE - PWE) Penn West advises
that it wishes to clarify information contained under the heading 'Long Term
Project Updates' in its third quarter release dated November 8, 2007 as
follows:

    Penn West engaged Sproule Associates Limited ("Sproule") to independently
evaluate certain of its resources contained on its lands located in the Peace
River Oil Sands Project as at September 30, 2007. Sproule's estimate was
limited to approximately 20 percent of the total Penn West lands in the Peace
River Oil Sands Project. On these evaluated lands, Sproule's estimate of Penn
West's share of Discovered Resources(1) of bitumen is approximately
1.7 billion barrels. This evaluation confirms Penn West's internal evaluations
on this portion of our oil sands leases based on stratigraphic tests and
regional geological mapping.

    -------------------------
    (1) Using the definitions set out in the Canadian Oil and Gas Handbook
    these resources are considered "Discovered Resources" and represent the
    mid case estimate. As Penn West is in the early stages of the project,
    these resources have not been classified into more specific categories.
    There is no certainty that a significant portion of these resources will
    be recovered or that a significant portion of the resources will be
    economically or technically feasible to produce in the future. Discovered
    resources are those quantities of oil and gas estimated on a given date
    to be remaining in, plus those quantities already produced from, known
    accumulations. Discovered resources consist of economic and uneconomic
    resources with the estimated future recoverable portion classified as
    reserves or contingent resources.

    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.

    %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;
William Andrew, President and CEO, Phone: (403) 777-2502


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