龙门山前隐伏构造带须家河组储层特征研究  

Reservoir Features of Xujiahe Formation in Buried Structural Belt in the Front of Longmenshan

作　　者：王兆生[1] 赵丰年[2] 陶娴娴 董桂玉[1] 杜敬国[1] 

机构地区：[1]河北联合大学矿业工程学院,河北唐山063009 [2]延长石油集团研究院,陕西西安710075 [3]中石油新疆油田分公司石西油田,新疆克拉玛依834000

出　　处：《石油天然气学报》2013年第1期36-40,49,共6页Journal of Oil and Gas Technology

摘　　要：依据钻井取心、岩石薄片以及扫描电镜分析等资料,对龙门山前隐伏构造带内须家河组的储层岩石学、物性、含油气性和成岩作用特征进行了深入分析。研究表明龙门山前隐伏构造带内须家河组储层岩性以岩屑砂岩、岩屑石英砂岩和长石岩屑砂岩为主,不同区块不同层位间略有差别。孔隙度主要分布在3%～5%,渗透率主要分布在0.01～1.00mD之间;平面上大邑地区含气面积较大,油气显示较好,鸭子河与安县地区的含气性显示较差,纵向上大邑地区的油气显示主要集中在须家河组二段和三段,鸭子河地区集中在须家河组二段和四段,安县地区集中在家河组三段和四段;在经历的各种成岩作用中,压实、压溶作用和各种胶结物的充填作用表现较为强烈,溶解作用较弱,造成储层物性较差,后期的破裂作用使得储集性能得到较好的改善;储集空间类型主要有粒内溶孔、粒间溶孔、残余粒间孔和微裂缝。Based on the data of drilling cores,thin section analysis and scanning electronic microscope,the reservoir petrologic features,reservoir properties and diagenesis of Xujiahe Formation in the buried structural belt in front of Longmenshan were deeply studied.The result shows that the reservoir lithology of Xujiahe Formation mainly included lithic sandstone,quartz sandstone and arcose,and there existed difference in different formations and blocks,where the porosity distribution was 3%～5%,and permeability distribution was 0.01～1mD.In the plane,Dayi Area had a larger area containing gas with better oil and gas shows,and the Yazihe area and the Anxian area had worse oil and gas shows.Vertically,oil and gas were mainly concentrated in the 2nd and 3rd members of Xujuahe Formation in Dayi Area,they were mainly concentrated in 2nd and 4th members of Xujuahe Formation in Yazihe Area,and they were mainly concentrated in 3rd and 4th members of Anxian area.Among various diageneses,dissolution is less,compaction,pressure solution and cementation are strong factors to reduce the porosity of the sandstone,but cataclasis is good to improve reservoir porosity and permeability.The reservoir pore spaces include intergranular dissolved pores,residual intergranular pores and micro-fractures.

关 键 词：龙门山 须家河组 储层特征 成岩作用 

分 类 号：P618.13[天文地球—矿床学]