Deep-layer natural gas reservoir in Yingcheng Formation of Songliao Basin is volcanic trap.The recognition of this kind of trap can provide the drilling target of natural gas exploration.

• 摘要松辽盆地深层营城组天然气气藏是火山岩圈闭气藏，识别火山岩圈闭可为天然气勘探提供钻探目标。