场发射扫描电镜及PerGeos系统在安页1井龙马溪组页岩有机质孔隙研究中的联合应用  

Study on Shale Organic Porosity in the Longmaxi Formation,AnYe-1 Well Using Field Emission-Scanning Electron Microscopy and PerGeos System

作　　者：白名岗 夏响华[1,2] 张聪 孟凡洋[1,2] 杨玉茹 张春贺[1,2] 代峰 熊杰[3] 王向华 于伟欣[3] BAI Ming-gang1,2, XIA Xiang-hua1,2, ZHANG Cong1,2 ,MENG Fan-yang1,2, FANG yu-ru1,2, ZHANG Chun-he1,2, DAI Feng3, XIONG Jie3 , WANG Xiang-hua3 , YU Wei-xin3(1.Oil ＆ Gas Survey Center, China Geological Survey, Beijing 100029, China; 2.Key Laboratory of Unconventional Oil ＆ Gas Geology, China Geological Survey, Beijing 100029, China; 3.School of Energy, China University of Geosciences （Beijing） , Beijing 100083, China)

机构地区：[1]中国地质调查局油气资源调查中心,北京100029 [2]中国地质调查局非常规油气地质重点实验室,北京100029 [3]中国地质大学(北京)能源学院,北京100083

出　　处：《岩矿测试》2018年第3期225-234,共10页Rock and Mineral Analysis

基　　金：中国地质调查局地质调查工作项目(DD20160094);"十三五"国家科技重大专项项目(2016ZX05034003-006)

摘　　要：安页1井是中国地质调查局在我国南方盆地外围武陵山复杂构造区实施并取得页岩气突破的一口地质调查参数井。本文以安页1井龙马溪组富有机质页岩为研究对象,利用场发射扫描电镜,研究了上扬子地区盆地外围龙马溪组富有机质页岩储集空间类型,并将Per Geos数字岩石处理系统引入有机质孔隙定量分析,定量刻画了有机质微纳米孔隙结构及发育特征。研究认为:有机质孔隙是安页1井龙马溪组富有机质页岩最主要的储集空间,形态上表现为填隙于自生硅质中的有机质发育着均匀海绵状孔隙结构,或与黏土矿物交互生长的有机质发育着气泡状孔隙结构,这两类不同赋存形态的有机质的孔隙均极为发育。通过Per Geos数字岩石系统处理,揭示了两类有机质孔隙孔径发育呈现双众数分布,其中海绵状结构的有机质孔隙孔径众数为5~10 nm,气泡状结构的有机质孔隙孔径众数为51~100 nm,有机质孔隙主要介于中孔~宏孔范畴。安页1井龙马溪组有机质孔隙的大量发育,指示了盆地外围的龙马溪组页岩经历了较强烈的生烃过程并具有较好的储集能力,具备良好的开发潜力。BACKGROUND： An Ye-1 well is a geological survey parameter well implemented by China Geological Survey.It has achieved shale gas breakthrough in the Wuling complex structural area outside the southern basin of China.OBJECTIVES： To quantitatively characterize micro-and nano-pore structure and development characteristics of organic matter,by researching organic matter pore on Longmaxi shale of An Ye-1 well.METHODS： Field Emission-Scanning Electron Microscope was used to study the reservoir type of the organic-rich shale of the Longmaxi Formation at the periphery of the basin in the Upper Yangtze region,and the PerG eos digital rock treatment system was introduced into the organic pores quantitative analysis.RESULTS： The organic pore is the most important reservoir space of the organic-rich shale of the Longmaxi Formation in Anye-1 well. It is characterized by organic matter interstitially forming in the authigenic siliceous organic matter with uniform sponge-like pore structure,or organic matter that interacts with clay minerals with a bubble-like pore structure. Pores in two different types of organic matter are extremely developed. The PerG eos digital rock system reveals that the pore sizes of the two organic pores show a bimodal distribution,in which the pore size of the organic pores with the sponge-like structure is 5 to 10 nm,and the pore size of the organic pores with the bubble-like structure is 51 to 100 nm. The organic pores are mainly in the mesopore to macropore category.CONCLUSIONS： The abundant development of organic matter pores in the Longmaxi Formation in An Ye-1 well indicates that the Longmaxi Formation shale in the periphery of the basin has experienced a strong hydrocarbon generation process and has a good storage capacity,showing a potential for development in the future.

关 键 词：龙马溪组 页岩 场发射扫描电镜 有机质微纳米孔隙 PerGeos数字岩石处理系统 

分 类 号：P588.2[天文地球—岩石学] P575.2[天文地球—地质学]