摘要
根据钻井、测井、测试及化验分析等资料，论证了榆林气田南区盖层及侧向致密岩性、水体的封隔能力，对圈闭的有效性进行了评价：榆林气田南区山2段气藏区域盖层为上石盒子组上部厚层泥岩，封盖性能良好；直接盖层为分布在山．山2段储层之间的泥岩、砂质泥岩，具有物性封闭和烃浓度封闭双重封盖能力；气田东西两侧及南部为致密岩性遮挡带，西南部构造低部位形成水体阻挡，均能有效封堵天然气的侧向外溢。与长北合作区之间砂体连通性好，无阻挡带，可部署监测控制井对长北边界封堵区运移气体进行封堵．
According to well drilling, logging, testing, analysis and other data, this paper demonstrates the sealing capacity of cap rock, side tight lithology, and water body in the south area of Yulin gas field. Effectiveness of traps is evaluated. The regional cap rock of Shan2 Member gas reservoir in Yulin gas field south area is upper thick-layer mudstone of upper Shihezi Formation with good seal-capping performance; the direct cap rock is mudstone and sandy mudstone distributed between reservoirs of the Shank and Shah2 Members, having double-capping capacity of physical property sealing and hydrocarbon concentration sealing; In the east and west sides and southern area of the gas field are tight lithology sheltering belts. Water body obstruction was formed in lower structural parts of the southwest, being able to effectively block up the side overflow of natural gas. It has good connection of sand body with Changbei cooperative area, without obstruction belt. Monitoring and controlling wells can be deployed to block the migration gas in the blocking area of Changbei boundary.
关键词
榆林气田
储气库
圈闭
评价
Yulin gasfield
gas storage
trap
evaluation
