黄骅拗陷奥陶系岩溶储层发育特征与控制因素  

Characteristics and karstification of the ordovician carbonate reservoir in the Huanghua depression

作　　者：李宏军[1] 付立新[1] 张津宁 周建生[1] 楼达[1] 吴雪松[1] 李会慎[1] 杨子玉[1] 段润梅[1] 赵勇刚[1] LI Hongjun;FU Lixin;ZHANG Jinning;ZHOU Jiansheng;LOU Da;WU Xuesong;LI Huishen;YANG Ziyu;DUAN Runmei;ZHAO Yonggang(Dagang Oilfield Company, PetroChina, Tianjin 300280, China;Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China)

机构地区：[1]中国石油天然气股份有限公司大港油田分公司,天津300280 [2]中国石油天然气股份有限公司勘探开发研究院,北京100083

出　　处：《西北大学学报（自然科学版）》2019年第3期417-427,共11页Journal of Northwest University（Natural Science Edition）

基　　金：中国石油天然气股份有限公司重大科技专项(2018E-11-02)

摘　　要：通过岩心观察和薄片鉴定,归纳总结岩溶类型,探讨岩溶作用的发育及控制因素。研究表明,黄骅拗陷奥陶系碳酸盐岩储层分为孔隙型、孔-洞-缝型及裂缝型3大类,储层发育程度与古风化壳的距离有关。岩溶作用主要为表生期岩溶作用和埋藏期岩溶作用,表生期岩溶作用因经历的构造运动背景不同而导致了岩溶路径和岩溶强度的明显差异,埋藏期岩溶作用多与后期的构造作用关系密切。表生岩溶作用存在均衡岩溶和差异岩溶两种,沉积-成岩与构造-古地貌对表生岩溶储层具有主要的控制作用。埋藏岩溶作用不仅受到发育沿断层、裂缝下渗大气淡水与埋藏环境压释水混合溶蚀作用的影响,而且岩浆-构造热液溶蚀作用亦对岩溶储层做出了贡献。The study area is situated in Huanghua depression,where paleokarstic features are massively developed in the carbonate rocks of the Ordovician,with abundant oil and gas resources and a broad prospect for the exploration and development of natural resources.Through core observation and thin slice identification,the characteristics of karst reservoirs are expounded,and summed up the types of karst,discussed on the development and control factors of karst.Research shows that the Ordovician carbonate reservoir can be divided into three categories:Pore type,holes-pores-seams type and fractured type.The degree of reservoir development is related to the distance of ancient weathering crust.Karstification mainly includes epikarst and buried karst.Because of the different tectonic movement background,there were obvious differences in the path and strength of the epikarst,and the buried karst was closely related to the late tectonic action.There were two types of epikarst:Equalizing karst and differential karst.Sedimentary diagenesis and tectonic palaeoggeomorphology played a major role in controlling epikarst reservoir formation.The buried karst is not only influenced by the mixed erosion of the atmospheric fresh water and the buried water,the magma hydrothermal fluid dissolution also contributes to the karst reservoir.

关 键 词：奥陶系 岩溶作用 表层岩溶 埋藏岩溶 碳酸盐岩 黄骅拗陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]