川东地区东岳庙段湖相页岩油气源储特征与富集层段优选  

Source-reservoir characteristics and optimization of enrichment layers of shale oil and gas of Dongyuemiao Member in eastern Sichuan Basin

作　　者：周红飞 洪海涛[1] 秦春雨 韩璐媛 康家豪 陈旺 王兴志 曾德铭[2,3] ZHOU Hongfei;HONG Haitao;QIN Chunyu;HAN Luyuan;KANG Jiahao;CHEN Wang;WANG Xingzhi;ZENG Deming(Research Institute of Exploration and Development,Southwest Oil&Gas Field Company,PetroChina,Chengdu 610411,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中国石油西南油气田分公司勘探开发研究院,四川成都610411 [2]油气藏地质及开发工程国家重点实验室,四川成都610500 [3]西南石油大学地球科学与技术学院,四川成都610500

出　　处：《断块油气田》2025年第1期10-19,共10页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“沉积期水下地貌对海相优质页岩发育的差异控制作用”(42372173);四川省自然科学基金项目“四川盆地深层-超深层白云岩溶蚀机理及成储效应”(2024NSFSC0007);中国石油-西南石油大学创新联合体项目“四川盆地侏罗系湖相页岩油地质理论技术研究与有利区评价”(2020CX050101)。

摘　　要：为研究四川盆地东部东岳庙段页岩油气源储特征并优选油气富集层段,文中利用岩心、测录井及分析测试资料对东岳庙段页岩岩石学特征、烃源岩特征、储层特征及含油性开展了研究。川东地区东岳庙段页岩矿物组分以黏土矿物、石英和方解石为主。页岩可划分为硅质页岩、混合质页岩与黏土质页岩3类。总有机碳质量分数(TOC)介于0.25%~7.52%,平均为1.44%,有机质类型以Ⅱ型为主,显微组分包括腐泥组与镜质组,页岩整体处于成熟—高成熟阶段。页岩孔隙类型以黏土矿物晶间孔与有机质孔为主,孔隙度平均为2.08%。部分页岩及其夹层由于裂缝的发育而表现出较高的渗透率(大于0.1×10^(-3)μm^(2)),并且微裂缝具有普遍含油的特征。页岩油气的富集受到了源储特征的影响。其中,页岩的生烃潜力是页岩油气富集成藏的基础,矿物组分、有机质类型及显微组分在很大程度上影响了油气富集空间发育程度,裂缝的发育则影响了油气的富集方向与储集性能。川东地区东岳庙段东二亚段中部为页岩油气富集层段。该段页岩在生烃潜力与储集性方面具有显著优势。In order to study the source-reservoir characteristics of shale oil and gas in Dongyuemiao Member,eastern Sichuan Basin,and to select the oil-gas enrichment layers,this paper studies the shale petrological characteristics,source rock characteristics,reservoir characteristics and oil content of Dongyuemiao Member by using the core,well logging and analysis test data.The shale mineral of Dongyuemiao Member in Eastern Sichuan Basin is mainly composed of clay minerals,quartz,and calcite.The shale can be divided into three types:siliciclastic shale,mixed shale,and argillaceous shale.The Total Organic Carbon(TOC)content of shale ranges from 0.25%to 7.52%,with an average value of 1.44%.The organic matter type is mainly typeⅡ,the microscopic components include sapropelic and vitrinite components,and the shale is in a mature to overmature stage.The pore types of shale are mainly clay mineral intercrystalline pores and organic pores,and the average porosity of shale is 2.08%.Some shale and its interlayers show higher permeability(>0.1×10^(-3)μm^(2))due to the development of fractures,and micro-fractures generally have oil-bearing characteristics.The enrichment of shale oil and gas is influenced by the source-reservoir characteristics.The hydrocarbon generation potential of the shale is the foundation of the enrichment of shale oil and gas.The mineral composition,organic matter type and maceral composition greatly affect the development dgree of the oil and gas enrichment space.The development of fractures affects the enrichment direction and reservoir property of oil and gas.The middle part of Dong 2 submember of Dongyuemiao Member in eastern Sichuan Basin is a shale oil and gas enrichment layer.This member of shale has significant advantages in hydrocarbon generation potential and reservoir property.

关 键 词：湖相页岩 富集层段 源储特征 东岳庙段 川东地区 

分 类 号：TE132[石油与天然气工程—油气勘探]