Calvalley Petroleum Logs Pay with Hiswah-5 Appraisal Well

Calvalley Petroleum reports that drilling and wireline logging operations on the vertical wellbore at the Hiswah-5 appraisal well have now been completed. The Hiswah-5 vertical well is located approximately 700 meters north west of Hiswah-4 and was drilled in order to further appraise the south east lobe of the Hiswah oil pool. The vertical well bore was drilled to a total depth of 1372 meters in granitic basement.

The top of the carbonate reservoir of the Saar Formation was penetrated at a depth of 1140 meters. Preliminary wireline log analysis together with excellent light oil and gas shows indicate 42.4 meters of gross hydrocarbon column and net hydrocarbon pay of about 22.5 m with an average porosity of 13% and an average water saturation of 28%.

The well was a step out from the existing Hiswah-4 well and was designed to further delineate and understand the south east extension of the Hiswah pool, first established by the Hiswah-4 well. The results at the Hiswah-5 well have confirmed the extent of the oil pool in the eastern part of the field and significantly increase the oil in place of the Hiswah oil pool. Calvalley's technical team are now incorporating the new data into the reservoir mapping to assess the impact on the estimate of recoverable oil from the Hiswah Field.

Hiswah-5 is the third of five planned appraisal wells into the Hiswah oil pool. The Hiswah-5 well is currently being sidetracked, with a horizontal wellbore to be drilled and production tested, with results expected in early May.

Calvalley Petroleum is the operator of Block 9 in Yemen.