合水地区长8储层成岩作用及对储层物性的影响  

The diagenesis of Chang 8 reservoir sandstone and its effect on reservoir quality in the Heshui region

作　　者：樊婷婷[1] 柳益群[1] 黄进腊[1] 郭倩[1] 王亚军[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2010年第3期481-487,共7页Journal of Northwest University（Natural Science Edition）

基　　金：中石化海相油气勘探研究基金资助项目(YPH08104)

摘　　要：目的探讨合水地区长8储层低孔低渗的原因,预测有利储层的发育区带。方法在沉积相研究的基础上,根据偏光显微镜和扫描电镜观测的微观成岩特征进行分析。结果在研究区砂体中,划分出黑云母(或铁泥质)强压实相、碳酸盐胶结相、长石溶蚀相、高岭石胶结相、绿泥石薄膜剩余孔隙相、绿泥石薄膜剩余孔-长石溶蚀相6个成岩相带。结论主砂体核部的绿泥石薄膜剩余孔隙相、绿泥石薄膜剩余孔-长石溶蚀相的砂岩物性好、含油性好,是油气富集的有利相带。Aim Through researching on diagenesis of Chang 8 reservoir sandstone in the Heshui region of Ordos Basin,it could find the reasons of low permeability and porosity,and fulfill prospect and evaluation of those zones where the high quality reservoirs are developed. Methods Based on the sedimentary facies research,using the microscope and the scanning electronic microscope,it is analyzed at diagenetic microscopic feature. Results The sandstones of Chang 8 sandstone is divided into six diagenetic lithofacies：mica intensive compaction,carbonate cement facies,feldspathic solution facies,kaolinite cement facies,chlorite remnant intergranular pore facies,chlorite remnant intergranular pore-feldspathic solution facies. Conclusion Sandstones in the latter two facies belts in the core of the mainsandbody have good poroperm characteristics and oil-bearing properties,thus they are favorable forhydrocarbon accumulation.

关 键 词：成岩作用 成岩相 低渗透储集层 鄂尔多斯盆地 合水地区 

分 类 号：TE112.2[石油与天然气工程—油气勘探]