Supplementary Oil and Gas Information

(unaudited)

The 2010 and 2009 supplemental data on the Company’s oil and gas activities was prepared in accordance with the FASB standard Extractive Activities – Oil & Gas . 2008 information was prepared in accordance with the predecessor standard SFAS No. 69: Disclosures About Oil and Gas Producing Activities . Activities not directly associated with conventional crude oil and natural gas production are excluded from all aspects of this supplementary oil and gas information. Comparable information prepared in accordance with Canadian disclosure requirements (National Instrument 51-101 of the Canadian Securities Administrators) is contained in Appendix A of Talisman’s Annual Information Form.

Supplementary oil and gas information reflects activities from assets that are classified as both continuing operations and, until disposed of, discontinued operations for financial reporting purposes. See note 3 to the Consolidated Financial Statements for details.