页岩气储层岩石孔隙特征对岩石密度作用机理探究  

Research on Influence of Porosity of Shale Gas Reservoir on Rock Density

作　　者：赵子斌[1,2,3] 侯读杰 陈皓禹[1,2,3] 程熊 董立成 贾智彬 Zhao Zibin;Hou Dujie;Chen Haoyu;Chen Xiong;Dong Licheng;Jia Zhibin(School of Energy Resource,China University of Geoscience(Beijing),BeiJing 100083,China;MOE Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism,China University of Geosciences,BeiJing 100083,China;Key Laboratory for Shale Gas Exploration and Assessment,Ministry of Land and Resources,China University of Geosciences,BeiJing 100083,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国地质大学(北京)储层演化与油气富集教育部重点实验室,北京100083 [3]中国地质大学(北京)页岩气资源评价与战略选区国土资源部重点实验室,北京100083

出　　处：《科技通报》2017年第10期23-28,共6页Bulletin of Science and Technology

基　　金：国家自然科学基金项目(41472108);国土资源部公益性行业科研专项(201311022)

摘　　要：利用页岩气储层岩石密度等信息反演储层孔隙类型等发育特征,在页岩气储层评价过程中有重要意义。研究通过岩石各组分含量加权计算岩石密度,具体地分析了北美的几套热演化成熟的页岩气有利层系的孔隙度及孔隙类型与密度间关系,分析影响岩石密度的因素,得出了(1)相同或相近孔隙度的具"有机孔"优势岩石呈现出高相对密度,"凝絮孔"等其他无机孔隙优势的岩石呈现出低相对密度;(2)具相同孔隙类型优势的岩石密度随着孔隙度的增大而降低;(3)具不同孔隙类型优势的岩石对比中,随孔隙度增大"有机孔"优势岩石比具其他类型优势孔隙的岩石密度低,反之则高。这些结论可为快速大致判断新区新井目的层位孔隙发育特征提供思路。It is significant for inversion of characteristic of pores to use density of shale/mudstone in shale gas reservoir evaluation.Density of shale/mudstone were calculated by each mineral percent contents.The correlation among mineral composition,porosity and density were specifically analysed,reaching the factors that affected the rock density.The results show that(1)shale gas reservoir rocks that holding advantage of organic-pores appears higher density than other types of pores with similar porosity;(2)density of rocks with same type of pores decrease with the increase of porosity;(3)whereas in the comparison of holding various types of pores,density of rocks with advantage of organic-pores decreases faster than other types of pores when porosity decreases.These conclusions may provide a method to estimate and judge the characteristics of pores in target strata roughly and fast.

关 键 词：页岩气 储层 密度 孔隙类型 孔隙度 

分 类 号：P618.12[天文地球—矿床学]