Exxon's 2010 Proved Reserves Total 3.5 Bboe

Exxon Mobil announced that additions to its proved reserves in 2010 totaled 3.5 billion oil-equivalent barrels, replacing 209 percent of production. Excluding the impact of asset sales, reserves additions replaced 211 percent of production.

"ExxonMobil continues to lead the industry in reserves replacement," said Rex W. Tillerson, chairman and chief executive officer. "Our strategic focus on quality resource capture, a disciplined approach to investment and excellence in project execution have resulted in replacement of more than 100 percent of production for 17 consecutive years. These reserve additions will enable ExxonMobil to develop new supplies of energy to meet future demand and support economic growth and improved standards of living."

The annual reporting of proved reserves is the product of the corporation's long-standing, rigorous process that ensures consistency and management accountability in all reserves bookings.

The corporation's reserves additions in 2010, the highest since the merger of Exxon and Mobil, reflect strategic acquisitions, new developments, as well as revisions and extensions of existing fields resulting from drilling, studies and analysis of reservoir performance. Reserves additions from acquisitions and subsequent revisions totaled 3 billion oil-equivalent barrels. Additions also came from the Sakhalin-1 Arkutun Dagi project in Russia and other countries including Canada, the United States, Nigeria, Norway and Abu Dhabi. Liquid additions totaled 905 million oil-equivalent barrels for a 102 percent replacement ratio and gas additions totaled 2.6 billion oil-equivalent barrels for a 328 percent replacement ratio.

At year-end 2010, ExxonMobil's proved reserves base increased to 24.8 billion oil-equivalent barrels, including 2.8 billion oil-equivalent barrels from XTO. The proved reserves base is split between 47 percent liquids and 53 percent gas, and includes oil sands extracted by mining and equity company reserves. The 2010 proved developed reserves add of 3.3 billion oil-equivalent barrels was also the highest since the Exxon and Mobil merger, driven by the successful startup of several projects, the results of ongoing work programs, and the acquisition of XTO Energy Inc.

Long-Term View

The long-term nature of the industry, and the large size of the discrete projects that provide a significant portion of the corporation's reserves additions, make it appropriate to consider a time horizon longer than a single year. The 10-year average reserves replacement ratio is 121 percent, with liquids replacement at 95 percent and gas at 158 percent. The reserves additions made during this period comprise a diverse range of resource types and have broad geographical representation. ExxonMobil's reserves life at current production rates is 15 years.


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