摘要
M油田古近系阿斯马瑞组风化壳岩溶储层异于传统岩溶储层,为搞清研究区风化壳岩溶作用模式及其控制因素,利用岩心观察描述资料,基于构造、沉积、储层成岩等方面探究认识,确定目标层风化壳岩溶识别标志:暴露不整合面、岩溶角砾岩、地下河流及大气淡水主控的溶沟、溶缝、溶洞。阿斯马瑞组风化壳岩溶属孔洞层叠加相控型、具明显岩性分异及分层性,受沉积、成岩、构造及岩溶等多因素相互影响、制约所致。建立了研究区古近系碳酸盐岩储层岩溶作用模式,为同类岩溶储层研究提供借鉴意义。
The Paleogene Asmari Formation's weathering crust karst reservoirs in the M Oilfield are distinct from conventional karst reservoirs.In order to clarify the weathering crust karstification model and its controlling factors in the study area,the identification marks of weathering crust karst in the target layer,which are exposed unconformity surface,karst breccia,underground rivers,and karst trenches,karst fractures,and karst caves dominated by atmospheric fresh water,are determined using the core observation and description data,based on the understanding of the structure,sedimentation,reservoir diagenesis,etc.The Asmari Formation's weathering crust karst is a type of superimposed phase-controlled pore-cavity layer with obvious lithological differentiation and layering that resulted from the mutual influence and constraint of numerous variables,including sedimentation,diagenesis,structure,and karst.A developed karstification model of the Paleogene carbonate reservoirs in the study area serves as a guide for the investigation of similar karst reservoirs.
作者
张学敏
秦欣
但玲玲
杨丽娜
魏莉
张雨
ZHANG Xuemin;QIN Xin;DAN Lingling;YANG Lina;WEI Li;ZHANG Yu(CNOOC EnerTech-Drilling&Production Co.,Tianjin 300452,China)
出处
《复杂油气藏》
2022年第3期30-36,共7页
Complex Hydrocarbon Reservoirs
基金
中海油能源发展股份有限公司重大科技专项,项目编号:HFZXKT-GJ2020-02-01。
关键词
风化壳
岩溶作用
岩溶模式
控制因素
阿斯马瑞组
M油田
weathering crust karst
karstification
karst model
control factors
Asmari Formation
M Oilfield
