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Marathon Announces Net Proved Reserve Additions for 2007

   Marathon Oil Corporation logo. (PRNewsFoto/MARATHON OIL CORPORATION)

HOUSTON, TX UNITED STATES
    HOUSTON, Feb. 19 /PRNewswire-FirstCall/ -- Marathon Oil Corporation
(NYSE: MRO) announced that during 2007, the Company added net proved liquid
hydrocarbon and natural gas reserves of 88 million barrels of oil
equivalent (mmboe) while producing 125 mmboe, for a reserve replacement of
70 percent. For the three-year period ended Dec. 31, 2007, Marathon added
net proved liquid hydrocarbon and natural gas reserves of 516 mmboe,
excluding dispositions of 46 mmboe, while producing 383 mmboe, resulting in
an average reserve replacement of 135 percent. Both the one-year and
three-year additions exclude the Company's 421 mmboe of proved bitumen
reserves in its Canadian oil sands business acquired in 2007, which are
reported separately.


(Logo: http://www.newscom.com/cgi-bin/prnh/20051027/DATH029LOGO ) Estimated Net Proved Reserves of Liquid Hydrocarbons & Natural Gas* (Millions of barrels of oil equivalent) U.S. Europe Africa Total As of December 31, 2006 350 182 730 1,262 Extensions, discoveries & other additions 30 13 31 74 Improved recovery 8 - - 8 Revisions of previous estimates (4) 6 2 4 Purchases of reserves in place 2 - - 2 Sales of reserves in place - - - - Production (52) (22) (51) (125) As of December 31, 2007 334 179 712 1,225 *Note: Bitumen reserves are not included. "Over the past five years, Marathon has more than doubled its total resource base, from 3.2 billion to 6.6 billion boe," said Clarence P. Cazalot, Jr., Marathon president and CEO. "Importantly, the 70 percent replacement rate for 2007 was achieved without benefit of any major project sanctioning. We expect to sanction at least two major development projects during 2008 which, along with other projects driven by our expanded resource base, will support future proved reserve additions and fuel our long-term, profitable production growth beyond our already well defined 6 to 9 percent compound average annual production growth through 2010." At year-end 2007, Marathon had estimated net proved liquid hydrocarbon and natural gas reserves of 1.2 billion boe, of which 53 percent were liquid hydrocarbons and 47 percent were natural gas. Marathon's 2007 proved reserve additions were primarily in Libya, Norway and Colorado's Piceance Basin. Proved developed reserves represented 72 percent of total proved reserves at year end 2007, as compared to 68 percent the previous year. Property acquisition, exploration and development costs incurred for oil and gas producing activities during 2007 were $3 billion. For the three-year period ended Dec. 31, 2007, costs incurred for oil and gas producing activities were $8 billion. Marathon is an integrated international energy company engaged in exploration and production; oil sands mining; integrated gas; and refining, marketing and transportation operations. Marathon, which is based in Houston, has principal operations in the United States, Angola, Canada, Equatorial Guinea, Gabon, Indonesia, Ireland, Libya, Norway and the United Kingdom. Marathon is the fourth largest United States-based integrated oil company and the nation's fifth largest refiner. This release contains forward-looking statements related to proved reserves of liquid hydrocarbons and natural gas, which are based upon certain assumptions, including, among others, presently known physical data concerning size and character of reservoirs, economic recoverability, technology development, future drilling success, production experience, industry economic conditions, levels of cash flow from operations and operating conditions. This release also contains forward-looking statements regarding proved bitumen reserves, which are based on presently known physical data, economic recoverability and operating conditions. Factors that could affect the timing and levels of liquid hydrocarbons and natural gas production and the development projects the Company anticipates sanctioning during 2008 include pricing, supply and demand for petroleum products, the amount of a capital available for exploration development, regulatory constraints, timing of commencing production from new wells, drilling rig availability, unforeseen hazards such as weather conditions, acts of war or terrorists acts and the governmental or military response thereto, and other geological, operating and economic considerations. The foregoing factors (among others) could cause actual results to differ materially from those set forth in the forward- looking statements. In accordance with the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995, Marathon Oil Corporation has included in its Annual Report on Form 10-K for the year ended December 31, 2006, and subsequent Forms 10-Q and 8-K, cautionary language identifying other important factors, though not necessarily all such factors, that could cause future outcomes to differ materially from those set forth in the forward- looking statements. Cautionary Note to U.S. Investors: The United States Securities and Exchange Commission (SEC) permits oil and gas companies, in their filings with the SEC, to disclose only proved reserves that a company has demonstrated by actual production or conclusive formation tests to be economically and legally producible under existing economic and operating conditions. Marathon Oil Corporation uses certain terms in this press release, such as total resource base, that the SEC's guidelines strictly prohibit us from including in filings with the SEC. U.S. Investors are urged to consider closely the disclosures in Marathon's periodic filings with the SEC, available from us at 5555 San Felipe, Houston, Texas 77056 and the Company's Web site at http://www.Marathon.com . You can also obtain this information from the SEC by calling 1-800-SEC-0330.
Media Relations Contacts: Lee Warren 713-296-4103 Scott Scheffler 713-296-4102 Investor Relations Contacts: Howard Thill 713-296-4140 Michol Ecklund 713-296-3919
SOURCE Marathon Oil Corporation




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  • http://www.marathon.com
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    CONTACT:
    Media Relations: Lee Warren, +1-713-296-4103,
    Scott Scheffler, +1-713-296-4102, Investor Relations: Howard
    Thill, +1-713-296-4140, Michol Ecklund, +1-713-296-3919, all of
    Marathon Oil Corporation