油气地质与采收率2018，Vol.25Issue(3)：95-100,6.DOI:10.13673/j.cnki.cn37-1359/te.2018.03.014
塔河断溶体油藏典型断溶体注水驱替规律及剩余油分布特征
Study on water drive law and characteristics of remaining oil distribution of typical fault-karst in fault-karst reservoirs, Tahe Oilfield
摘要
Abstract
Influenced by selective dissolution and fracture development degree,fault-karst reservoirs in Tahe Oilfield have the characteristics of extremely complex inner structure and obvious fracture-vug separation,which results in difficulty in understanding of water flood development.Based on the relationship between storage and flow in the oil reservoirs and five typical types of fault-karst,numerical simulation was carried out to study water drive law and remaining oil distribution characteristic of the five typical types of fault-karst from the aspects of injection velocity,injection-production position and fracture participation based on fluid dynamics.The results show that the displacement efficiency of the type "Y" fault-karst and the compound type fault-karst increases continuously when the injection velocity increases and the injection-production position changes from low to high.However,the displacement efficiency of type "V" fault-karst,type "T" fault-karst and belt-shaped fault-karst are hardly influenced by the above factors.The existence of fractures makes the displacement efficiency of the fracture-karst decrease.The distribution of remaining oil depends on the injection-production position and the connectivity mode of the fracture-karst.The remaining oil mainly distributes in bypass fault-karst of non-dominant channel,small arch and the bottom of fault-karst.关键词
断溶体油藏/典型断溶体/注水驱替效率/裂缝参与/剩余油分布Key words
fault-karst reservoir/typical fault-karst/water flooding efficiency/fracture participation/remaining oil distribution分类
能源科技引用本文复制引用
唐海,何娟,荣元帅,李小波..塔河断溶体油藏典型断溶体注水驱替规律及剩余油分布特征[J].油气地质与采收率,2018,25(3):95-100,6.基金项目
国家科技重大专项“缝洞型油藏注水物理模拟实验及效果评价技术研究(2016ZX05053-06-02). （2016ZX05053-06-02）
