Ecopetrol announces 2012 proven reserves

February 18, 2013

On 15 Feb 2013, Colombia's Ecopetrol SA announced its proven reserves (1P, according to the international designation) of crude oil, condensate and natural gas, including its interest in affiliates and subsidiaries, as of December 31, 2012. Proven net reserves (1P) increased to 1,877 million barrels of oil equivalent at the end of 2012.

Reserves were calculated based on the US Securities and Exchange Commission (SEC) standards and methodology, and 99% of them were audited by three different specialized independent companies.

Proven net hydrocarbon reserves owned by Ecopetrol, including its interest in affiliates and subsidiaries, at the close of 2012 were 1,877 million barrels of oil equivalent (mmboe), a 1.1% increase compared to the 1,857 mmboe in 2011. During 2012, proven reserves increased by 252 mmboe and net production was 232 mmboe.

The reserves replacement ratio in 2012 was 109%, which means that for each barrel of oil equivalent produced, 1.09 barrels were added to the proven reserves.

The reserves/production ratio (average life of reserves) is 8.1 years, assuming production levels as in 2012.

Over the past three years (2010-2012), Ecopetrol has increased its net reserves by 22%, from 1,538 mmboe at the end of 2009 to the current 1,877 mmboe at December 31, 2012. During this same period, net production increased from 160 mmboe in 2009 to 232 mmboe in 2012, up by 45%. The average reserves replacement ratio for the period was 155%.

Ecopetrol logo

The higher amount of proven reserves was primarily the result of the extensions of proven areas, improved recovery and revised prior estimates in some fields. The main contributors of the additional volumes were the fields Casabe, Tibu and Castilla, operated by Ecopetrol, as well as Cupiagua, Pauto, Cano Limon and Quifa, in partnership with other companies.

Of the 1,877 mmboe of proven reserves, 95% comes from Ecopetrol S.A., and the remainder by Hocol, Ecopetrol America, and the Company’s interests in Equion and Savia Peru.

Reported reserves do not include those of all the discoveries announced in 2011 and 2012 in Colombia and abroad, as some were undergoing appraisal and development planning stage.

Proven reserves as of Dec. 31, 2011 1,857
Extensions and discoveries 143
Revised prior estimates 44
Acquisitions 0
Improved recovery 65mmboe
Production/sales for 2012 -232
Proven reserves at Dec. 31, 2012 1,877
Website: www.ecopetrol.com.co


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