Thai oil and gas company PTTEP has made an oil and gas discovery from the first exploration well, Sirung-1, in Block SK405B, off the coast of Sarawak, offshore Malaysia. The well, spudded in January, was drilled to a total depth of 2,538 meters where it encountered a significant oil and gas column of more than 100 meters, in the clastic reservoirs. An appraisal well is scheduled in near future to assess the upside resources, PTTEP said