鄂尔多斯盆地直罗油田长6油层组成岩作用及孔隙演化研究  

Diagenesis and Porosity Evolution of Chang-6 Oil-bearing Formation in Zhiluo Oilfield of Ordos Basin

作　　者：王彩萍[1,2] 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065 [2]陕西延长石油(集团)有限责任公司直罗采油厂,陕西富县727500

出　　处：《地球科学与环境学报》2010年第2期161-165,共5页Journal of Earth Sciences and Environment

基　　金：国家自然科学基金项目(40173005)

摘　　要：位于鄂尔多斯盆地的直罗油田三叠系延长组长6油层组为近年来新开发的一个主力油气产层。岩石学和成岩作用特征研究表明,直罗油田长6油层组以细粒长石砂岩和岩屑长石砂岩为主,砂岩经历了机械压实作用、胶结作用、交代作用和溶蚀作用等成岩作用,成岩作用处于晚成岩阶段A期。成岩作用控制了储层砂岩孔隙发育特征,其中压实作用与胶结作用是导致储层超低渗的主导因素,而次生溶蚀孔隙的形成对储层砂岩物性具有一定改造作用,并控制了该区长6油层组相对高孔高渗储层的展布特征。Chang-6 Oil-bearing Formation of Triassic Yanchang Formation in Zhiluo Oilfield of Ordos Basin is weightily exploited in recent years.Characteristic of petrology and diagenesis of the oil-bearing formation was studied.The result showed that Chang-6 Oil-bearing Formation was composed by fine-grained and debris feldspar sandstones;sandstone experienced complex diagenesis including compaction,cementation,alteration and dissolution;diagenesis reached A period in the late diagenetic stage.Diagenesis controlled reservoir porosity of sandstones in which compaction and cementation caused low permeability while secondary vugular-solution pore improved the reservoir property and controlled distribution characteristics of Chang-6 Oil-bearing Formation with relatively high permeability and porosity.

关 键 词：成岩作用 成岩阶段 孔隙类型 长6油层组 直罗油田 鄂尔多斯盆地 

分 类 号：TE343[石油与天然气工程—油气田开发工程] P618.13[天文地球—矿床学]