CALGARY, ALBERTA--(Feb. 25, 2010) - Nexen Inc. has filed its Annual Information Form (Annual Report on Form 10-K), containing its annual reserves disclosure. The report can be accessed electronically from:

- SEDAR at www.sedar.com

- EDGAR at www.sec.gov

- Nexen at www.nexeninc.com/investors

Shareholders may request a hardcopy of the complete audited financial statements free of charge on our website.

Nexen Inc. is an independent, Canadian-based global energy company, listed on the Toronto and New York stock exchanges under the symbol NXY. We pursue three growth strategies: oil sands and unconventional gas in Western Canada and conventional exploration and development primarily in the North Sea, offshore West Africa and deep-water Gulf of Mexico. We add value for shareholders through successful full-cycle oil and gas exploration and development, and leadership in ethics, integrity, governance and environmental stewardship.

Contact Info

Lavonne Zdunich, CA
Manager, Investor Relations
(403) 699-5821
or
Tim Chatten, P.Eng
Analyst, Investor Relations
(403) 699-4244
or
Pierre Alvarez
Vice President, Corporate Relations
(403) 699-5560
or
Carla Yuill
Manager, Corporate Communications
(403) 699-4704
or
Nexen Inc.
801 - 7th Ave SW
Calgary, Alberta, Canada T2P 3P7
www.nexeninc.com