In a statement Dana said, “The Ujung Pangkah North and Ujung Pangkah West appraisal wells were drilled approximately 3 km and 5 km respectively from the nearest existing well, using the jack-up drilling rig ‘Ocean Sovereign’.”

“Both wells encountered gas overlying oil in the Kujung limestone formation at a depth of approximately 4,800 feet below sea level. The gas-oil contact and oil-water contact in the wells are both at a depth consistent with that observed in the previous wells drilled on the eastern part of the structure, indicating the discovery of a significant extension to the previously proven area of the Ujung Pangkah field.

“The northern well encountered an oil column with a thickness of 77 feet underlying a gas column spanning 78 feet. Production testing of the oil zone resulted in a stabilised flow rate of 2,300 barrels per day. A separate test of the gas zone achieved a flow rate of 14.4 million cubic feet per day.

“The western well encountered a similar section of oil bearing limestone underlying a larger 117 feet gas column. Production testing of the oil zone in this well resulted in stabilised flow rates of 2,100 barrels per day and a separate test of the gas zone achieved a flow rate of 31.4 million cubic feet per day,” added the firm.

According to Dana, it has extended the rig contract and will proceed to drill an appraisal well on the West Sidayu prospect, which is located to the north of the Ujung Pangkah field but still within the PSC.