On May 12, the first double-step horizontal Well Se H2-11 at Qinghai Sebei gas field was successfully completed, which is drilled by 30612 drilling crew of CNPC Xibu Drilling Engineering Company Limited.
With high gas saturation and a thickness of 5 meters, the upper part 2-1-5 gas reservoir encountered in Well Se H2-11 is of classⅠ. The 4 meters thick lower part 2-1-1 gas reservoir is of classⅡ, which is interbedded with mudstone and has a relatively low gas saturation.