鄂尔多斯盆地富县地区延长组成岩作用与优质储层关系研究  

The Study of Relationship between the Diagenesis and the Quality Reservoir of Yanchang Formation in Fuxian area of Ordos Basin, China

作　　者：万友利[1] 张哨楠[1,2] 丁晓琪[1] 陈倩倩[3] 朱志良[3] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]西南石油大学资源与环境学院,四川成都610500 [3]成都理工大学能源学院,四川成都610059

出　　处：《新疆地质》2013年第2期207-212,共6页Xinjiang Geology

基　　金：国家自然科学青年基金项目(40602012);国家科技重大专项(2008ZX05045)共同资助

摘　　要：对鄂尔多斯盆地富县地区延长组长8、长6油层组储层砂体成岩作用研究表明,该套砂体受NE向阴山古陆物源控制,碎屑中黑云母等塑性物质含量高,压实作用强,致密程度高,油气充注于致密砂岩背景的优质储层中。富县地区储层砂体致密程度高,主要是强压实、强胶结、溶蚀作用相对较弱等原因导致。绿泥石环边发育可降低上覆地层压实作用,刚性颗粒含量高可有效降低上覆地层压力对塑性颗粒的变形作用。后期酸性水溶蚀作用的强弱与溶蚀前储层砂体物性和胶结物成份关系密切,储层砂岩溶蚀前孔隙越发育,后期溶蚀作用愈强。优质储层常发育于三角洲前缘亚相水下分流河道特别是主河道粒度较粗、刚性颗粒含量较高的砂体中。The diagenesis characteristics of the Chang 8 and Chang 6 in the Yanchang Formation sandstone from the Up-per Triassic in Fuxian area of the Ordos Basin show that this set of sandstones were controlled by the sediment source from northeast Yinshan ancient land,the high content of detrital composition of biotite and other plastic material strong compaction,and result to the high degree of densification, the fine reservoirs are rich in petroleum because the tight sand-stones have high capillary pressures. The main causes of forming tight sandstones are the strong compaction and cementa-tion. Solution of organic acid is late because of the low temperature. So, the solution is weak. Chlorite rims can retard the compaction. Similarly, little plastic particles canal so decrease their shape change caused by compaction. The later solu-tion is determined by the former petro physics and cementation. If pores are well2 developed,the solution will develop as well. The quality of reservoir development in the delta front, subaqueous distributary channel, especially the main chan-nel of the coarse grain size, rigid particles with higher levels of the sand body.

关 键 词：鄂尔多斯 富县 延长组 成岩作用 优质储层 

分 类 号：P618.130.21[天文地球—矿床学]