Exhibit 23.5
Data & Consulting Services
Division of Schlumberger Technology Corporation
[Logo]
Two Robinson Plaza, Suite 200
Pittsburgh, PA 15205
Tel: 412-787-5403
Fax: 412-787-2906
CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS
Data & Consulting Services Division of Schlumberger Technology Corporation consents to the incorporation by reference in this Registration Statement on Form S-8 of information contained in our report, as of 31 December 2009, setting forth the estimates of revenues from the oil and gas reserves of BreitBurn Energy Partners L.P. and its subsidiaries appearing in the Annual Report on Form 10-K of Quicksilver Resources Inc. for the year ended 31 December 2009.
DATA & CONSULTING SERVICES DIVISION OF SCHLUMBERGER TECHNOLOGY CORPORATION | ||
By: | /s/ Charles M. Boyer II | |
Charles M. Boyer II, PG, CPG, CCG | ||
Advisor Unconventional Reservoirs |
21 April 2010