致密砂岩气层中成岩相对岩电特征的影响  

Effects of Diagenetic Facies on Rock Electrical Properties in Tight Gas Sandstones

作　　者：刘洪平[1] 骆杨[1] 赵彦超[1] 陈召佑[2] 穆国栋 Liu Hongping Luo Yang Zhao Yanchao Chen Zhaoyou Mu Guodong(Key Laboratory of Tectonics and Petroleum Resource of the Ministry of Education, China University of Geoscieuces, Wuhan 430074, China Huabei Company, Sinopec Group, Zhengzhou 450006, China Yinghua Inspection and Testing Co. , Ltd. , Shanghai 201203, China)

机构地区：[1]中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074 [2]中国石化华北分公司,河南郑州450006 [3]英华检测有限公司,上海201203

出　　处：《地球科学（中国地质大学学报）》2017年第4期652-660,共9页Earth Science-Journal of China University of Geosciences

基　　金：构造与油气资源教育部重点实验室开放基金(No.TPR-2015-11);国家自然科学基金青年基金(No.41402117)

摘　　要：致密砂岩气层的研究是目前的研究前沿之一.利用铸体薄片、物性、高压压汞、micro-CT、岩电实验等分析化验资料,探讨了鄂尔多斯盆地定北地区二叠系太原组致密砂岩不同成岩相类型对岩电特征的控制作用.研究表明:研究区可以划分为4种成岩相类型,包括硅质胶结成岩相、高岭石部分充填成岩相、不稳定组分溶蚀成岩相,压实致密成岩相.4种成岩相类型地层因素和孔隙度在同一趋势线上,可以采用统一的a,m值.4种成岩相类型的n值有明显差异,取值依次为2.30、1.51、2.03和4.04.含气饱和度解释实例显示,对不同成岩相取不同n值与试气结果吻合较好,优于n值取理论值2的结果.The research ahout tight gas sandstones is one the forefront research. In order to characterize rock electrical proper- ties in tight gas sandstones of different diagenetic facies in Taiyuan Formation, Dingbei Area, we conducted casting thin sec- tions, porosity and permeability, micro-CT and high pressure mercury intrusion/withdrawal method on these sandstones. Four diagenetic facies are observed in the area, namely, quartz eementation diagenetic facies, kaolinite partially filled diagenetie faci- es, unstable components resolution diagenetie facies and tight compaction diagenetic facies. The formation factor shows very good relationship with porosity regardless of diagenetic facies, hence a and m are set eonstant at 15.88 and 0.82 for all the dia- genetic facies. Saturation exponent （n） are variable among the different diagenetic facies, 2. 30, 1. 51, 2. 03 and 4. 04 are selected repectively for the n value of the four diagenetic facies. Examples show that the chosen electrical parameters have good agreements with the gas production test, much better than the result of chosen the theoretical n value of 2.

关 键 词：致密砂岩 成岩相 岩电特征 测井 石油地质 

分 类 号：P631[天文地球—地质矿产勘探]