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川中公山庙油田凉高山砂岩储层主控因素分析 预览

Reservoir Control Factors of Lianggaoshan Formation of Gongshanmiao Oil Field in Central Sichuan
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摘要 通过取芯井岩心观察、普通薄片和铸体薄片鉴定、X衍射分析、场发射环境电镜扫描及地球化学实际测量分析等,对川中公山庙油田凉高山致密砂岩储层特征进行综合研究。凉高山致密砂岩储层岩石类型主要为灰色粉砂岩,沉积相主要为滨浅湖相滩坝。砂岩储层致密化的主要原因是受到强烈持久的成岩作用所致,其中机械压实作用是砂岩孔隙降低的主要原因,胶结作用导致储层物性显著降低。由构造作用和成岩作用形成的裂缝、微裂缝在一定程度上改善了储层的物性,提高了油气渗流能力。研究区砂岩储层属于灰质胶结超低孔低渗极致密储层,储层的分布主要受沉积相、成岩作用与裂缝发育程度的控制。 Through drilling core description,thin section identification,X-ray diffraction analysis,field emission scanning electron microscopy and organic geochemical analysis,etc.,the characteristics of dense sandstone reservoir is comprehensively studied in Lianggaoshan area of Gongshanmiao oilfield,central Sichuan. The rock types are mainly composed of gray siltstone,and sedimentary facies is mainly shore shallow lake beach dam. Strong and persistent diagenesis is the main reason of the densification,and the compaction is the main cause of reduced sandstone pore; while cementation significantly reduces the reservoir physical properties. Tectonic deformation and diagenesis formes a certain number of cracks which greatly improve the physical property of the reservoir and the ability of oil and gas seepage was improved as well. This target area belongs to extremely tight reservoir with low porosity and permeability gray matter cementation. The reservoir distribution is mainly affected by sedimentary facies,diagenesis and fracture development degree.
作者 董小波 DONG Xiaobo( Zhengzhou Technical College, Zhengzhou 450121, China)
出处 《重庆科技学院学报:自然科学版》 CAS 2017年第6期13-16,共4页 Journal of Chongqing University of Science and Technology:Natural Science Edition
基金 国家重点基础研究发展计划项目(“973”计划)“中国陆相致密油(页岩油)形成机理与富集规律”(2014CB239003)
关键词 致密砂岩储层 裂缝 储层特征 凉高山段 公山庙油田 tight sand reseroir fissure reservoir characteristics Lianggaoshan member Gongshanmiao oilfield
作者简介 董小波(1988-),,河焦作人,硕士,研究方向为遗迹学、石油地质学.
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