Interim report for the quarter and six months ended June 30, 2007

• The quarterly net result amounted to MUSD 6.6 (MUSD 7.6)* and the six months net result amounted to MUSD 5.7 (MUSD 13.9).

• EBITDA amounted to MUSD 26.8 (MUSD 19.2) for the quarter and to MUSD 40.5 (MUSD 34.1) for the six month period.

• Oil production increased by 38% to 2,417,700 barrels for the quarter and by 47% to 4,682,358 barrels for the six month period.

• Total revenue increased by 48% to MUSD 83.8 (MUSD 56.6) for the quarter and by 44% to MUSD 142.6 (MUSD 99.2) for the six months.

• Earnings per share amounted to USD 0.01 (USD 0.01) per share for the quarter and to USD 0.00 (USD 0.01) per share for the six month period.

• The 2007 capital expenditures plan was reduced from MUSD 210 to MUSD 198

• The 2007 oil production projection revised from 12 to 11 million barrels as 2nd half target of 7 million barrels is not likely to be reached

• Successful drilling activities in all regions expected to result in oil reserve increases

• The company was listed on the Stockholm Stock Exchange in May 2007



*Comparisons reflect the quarter and the six months ended June 30, 2006

About Us

West Siberian Resources Ltd is an independent oil company active in the Tomsk region in Western Siberia. West Siberian’s depository receipts are traded on Nya Marknaden of the Stockholm Stock Exchange under the symbol WSIB.

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