EXHIBIT 23.7 [KPMG LLP LETTERHEAD] CONSENT OF INDEPENDENT AUDITORS The Board of Directors Westport Resources Corporation We consent to the use of our report on the combined statements of revenues and direct operating expenses for certain oil and natural gas properties and mid-stream gathering and compression assets of El Paso Corporation and certain of its affiliates for the nine months ended September 30, 2002 and the years ended December 31, 2001 and 2000, incorporated by reference herein. /s/ KPMG LLP KPMG LLP Denver, Colorado January 23, 2003