地质学报2017，Vol.91Issue(3)：629-644,16.
渤海湾盆地东营凹陷沙河街组页岩油储层微观孔隙特征
Micro-pore Characteristics of Shale Oil Reservoirs of the Shahejie Formation in the Dongying Sag, Bohai Bay Basin
摘要
Abstract
Micro-pore type,pore distribution and structure characteristics of shale oil reservoirs of Shahejie Formation in the Dongying Sag,Bohai Bay Basin,were studied using a field-emission environmental scanning electron microscope,low-temperature nitrogen adsorption experiment and high-resolution quantitative analysis backscattered electron image.The results indicate that the matrix pores of the Shahejie Formation shale oil reservoir contain five types:inter-particle pores,intra-particle pores,intercrystal pores,dissolved pores and intra-crystal pores.Favorable reservoir spaces for shale oil reservoirs have porosity with diameter ranging from 100 to 3000 nm,and are dominated by inter-particle pores,intraparticle pores and dissolved pores.The pore shapes of mudstone and limestone contain thin neck bottle (inkwell) and parallel plate;dolomite has parallel-plate pore shape with the best connectivity.Dolomite has a high Quantitative Plane Porosity (QPP) and therefore has well-developed pore system,followed by mudstone,with limestone of low QPP.Main factors affecting micro-pore features include mineral compositions and contents,hydrocarbon discharge and hydrothermal process,among which clay mineral and clay-size particles are conductive to micro-pore development,while cementation and recrystallization of calcite are against pore development.Organic acid with hydrocarbon discharge and hydrothermal process is conductive to development of secondary pores.关键词
页岩油储层/微观孔隙类型/孔隙特征/东营凹陷/沙河街组Key words
shale oil reservoir/micro-pore types/pore characteristics/Dongying Sag/Shahejie Formation引用本文复制引用
刘毅,陆正元,冯明石,王军,田同辉,晁静..渤海湾盆地东营凹陷沙河街组页岩油储层微观孔隙特征[J].地质学报,2017,91(3):629-644,16.基金项目
本文为国家科技重大专项(编号2011zx05011)资助成果. （编号2011zx05011）
