吐哈盆地致密砂岩气成藏特征及勘探方向  

Characteristic of Tight Sandstone Gas Reservoir in Tuha Basin and Its Exploration Target

作　　者：王劲松[1,2] 王文慧 牟兰昇 刘护创 宋海波 宋承文 

机构地区：[1]中国地质大学资源学院,武汉4300742 [2]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009

出　　处：《新疆石油地质》2011年第1期14-17,共4页Xinjiang Petroleum Geology

基　　金：中石油吐哈盆地砂岩气成藏条件与大气田勘探方向研究(2010A-0604)

摘　　要：吐哈盆地侏罗系水西沟群具备形成大面积致密砂岩气藏的地质条件,煤系地层长期大量生排气态烃为形成致密砂岩气藏提供了充足的气源,烃源岩与储集层呈互层紧密接触有利于气源内致密砂岩成藏,致密砂岩中气体的运聚与常规气藏有明显的差异,在"活塞式"充注条件下,致密砂岩气藏的含水率明显偏高,压力也呈现出高(低)压异常。吐哈盆地南部斜坡区及北部山前冲断带地区,源岩与储集层配置条件优越,是寻找致密砂岩气藏的有利区域。The Shuixigou group of Jurassic in Tuha basin has geologic conditions for forming large-area tight sandstone gas reservoir.Long-term and great amount gaseous hydrocarbon generation and expulsion provide good preconditions for forming tight sandstone gas reservoir.The source rocks and reservoir rocks appear in interbedded contact relations which are favorable for inter-source gas accumulation in the tight sandstone reservoir.The gas migration and accumulation in the tight sandstone reservoir are quite different from those in conventional gas reservoir.In condition of piston-like gas charging,the water cut in tight sandstone gas reservoir is obviously high,and high or low pressure anomaly occurs.Under effective assemblages of the source and reservoir rocks,the south slope and north piedmont thrust belt in Tuha basin are favorable areas for exploration of tight sandstone gas reservoirs.

关 键 词：吐哈盆地 致密砂岩气藏 水西沟群 煤系源岩 成藏特征 

分 类 号：TE112.41[石油与天然气工程—油气勘探]