塔河油田奥陶系储层岩溶作用机制及影响因素

Action Mechanism and Influencing Factors of Ordovician Reservoir in Tahe Oilfield

岩溶缝洞型碳酸盐岩储层是塔河油田奥陶系最重要的储集层类型,深入研究岩溶作用机制及其控制因素,对认识储层的发育规律和寻找有效储层具有重要意义。文章在对岩溶发育的基本规律统计及对岩溶作用时间界定的基础上,分析认为塔河油田奥陶系储集层主要岩溶作用机制包括沉积期淡水溶蚀作用和受不整合面控制的构造岩溶作用两种,影响岩溶作用的主要因素为构造和岩溶古地貌,其次环境、气候及地层流体性质也对岩溶发育有一定的影响作用。

Karst seam cave carbonate reservoir is the most important reservoir type of Ordovician system in Tahe oilfield.It is of great significance to study the karst mechanism and its control factors to understand the development law of reservoir and find the effective reservoir.On the basis of the basic law of karst development statistics and the karst action time definition,the analysis that the tashe reservoir reservoir main karst mechanism including sedimentary fresh water dissolution and the unconformity surface,the control of structural karst two kinds,the main factors affecting the Karst for structure and karst ancient landform,the second environment,climate and formation fluid properties also has certain influence on karst development.