摘要
张家垛阜三段储层属中低孔、低渗-特低渗储层。储层对流体流速有很强的敏感性,速敏损害率大于70%,临界流速为1.416 m/d。水敏伤害指数为61%,中等偏强水敏。储层酸敏伤害指数为17%,对盐酸液弱敏感。储层对碱液有很强的敏感性,碱敏伤害指数为92%,临界pH值为10。相渗曲线表现出低渗储层的典型特征:油相相对渗透率下降快,水相相对渗透率最终值低,油水两相共渗区范围窄。反映储层孔喉狭窄,连通性不好。实际生产上表现出见水早,见水后含水上升快,产油量递减快,无水期采收率较低的特点。
The third member of Funing formation in Zhangjiaduo has the reservoirs with low-medium porosity and low-extra low permeability. The reservoirs have high velocity-sensitivity with damage rate over 70 % and critical velocity of 1,416 m/d, medi- um-high water-sensitivity with damage index of 61%, weak hydrochloric-sensitivity with damage index of 17 %, high lye-sensitivi- ty with damage index of 92 % and critical pH value of 10. The relative permeability curve demonstrated typical characteristics of low-permeability reservoirs as follows： rapid decline of the relative permeability of nil phase; low end value of the relative permea- bility of water phase; narrow scope of the co-permeance scale of oil-water phase. The characteristics mentioned above reflect the narrow reservoir pore throat and poor connectivity. In actual practice, the characteristics emerged as follows： early presence of wa- ter; fast rising of water content after water presence; rapid decline of oil production; relatively low recovery ratio in water-free peri- od.
出处
《油气藏评价与开发》
2011年第6期48-51,共4页
Petroleum Reservoir Evaluation and Development
关键词
张家垛阜三段
黏土矿物
储层敏感性
油水相对渗透率
third member of Funing formation in Zhangjiaduo, clay minerals, reservoir sensitivity, oil-water relative permeability
