鄂尔多斯盆地直罗油田长8油层组储层特征研究  

The reservoir characteristics of Chang 8 oil-bearing Formation in the Zhiluo oil field of Ordos Basin

作　　者：肖晓光[1] 李群[1] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室地球科学与信息物理学院,湖南长沙410083

出　　处：《中国地质》2014年第1期187-196,共10页Geology in China

基　　金：国家科技重大专项课题(2008ZX05002-005)资助

摘　　要：本文应用岩石薄片、铸体薄片、扫描电镜、压汞实验等测试分析资料,对直罗油田延长组长8油层组储层的岩石学特征、物性特征、孔喉结构及孔喉类型等进行深入研究,试图探明该储层储集性能,为该区的勘探工作打好基础。结果表明,以水下分支河道沉积为主体的长8油层组储集砂体主要为长石砂岩、岩屑长石砂岩,成分成熟度较低,结构成熟度中等;储集空间为粒间孔、粒内溶孔和晶间孔;储层物性较差,为典型的低孔低渗储层。物源方向、沉积相的展布控制了储层平面上的物性;垂向上压实作用和胶结作用对储层物性起破坏作用,溶蚀作用则对储层物性的改善有建设作用。With the methods of rock section, cast section, scanning electron microscope, pressured mercury testing data we made a deep research of the Zhiluo oilfield Chang 8 reservoir＇s lithology, physical properties, pore throat structure and pore throat types in the paper. This study trying to make a clear inquiry of this area＇s reserve property and which lay a significant foundation for the further work. The result defines the Chang 8 reservoir, deposited in subaquatic distributary channels, are mainly made up of feldspathic sandstone, debris-feldspathic sandstone. With interparticle pore, intragranular dissolved pore and intercrystal pore, the reservoir is characterized by low compositional maturity and middle texture maturity, which had a poor physical property and it is typical low porosity and low permeability reservoir. In the plane, the reservoirs＇ physical property is controlled by provenance and sedi-mentary face zones, in vertical direction, the compaction and cementation lead poor reservoir＇s physical property and dissolution is favorable to reservoir property.

关 键 词：直罗油田 储层特征 成岩作用 延长组 鄂尔多斯盆地 

分 类 号：P618.13[天文地球—矿床学]