Calvalley Finds Oil with Al Roidhat 4 Well in Yemen

Calvalley Petroleum, Operator of Block 9, announces that the Al Roidhat 4 appraisal well that spudded on July 22nd has encountered oil in the Upper Qishn Sand Formation reservoir. Initial wireline log evaluation indicates between 6.5-8.5 m oil pay in a 22 m gross oil column. The well has been cased with 9 5/8" production casing and drilling has resumed to investigate the hydrocarbon potential in the Saar, Shuqra, Kohlan and basement formations. After this well is completed, the drilling rig will be moved to the recently identified South Roidhat exploration prospect located approximately 5 km southwest of the Al Roidhat 1 discovery well in order to drill an initial exploration well.

The Company has also received the results of the third party engineering assessment of the Auqban 1 production test of the Shuqra Formation reservoir. The analysis by Chapman Engineering Ltd indicated that the Shuqra Formation reservoir had an average reservoir pressure of 1,360 psi and flowed at a maximum rate of 283 barrels oil per day and 41.3 thousand cubic feet per day gas from 9.1m net oil pay over a 59 hour test using a downhole submersible pump.