摘要
通过数值模拟和室内岩心驱替实验,结合现场实际数据,认为在所研究的地质特征范围内,某些注采井间的确产生了微小的裂缝。在聚合物注入期间,裂缝宽度变化范围为1.4mm到5.0 mm.而在聚合物注入后的后续水驱阶段,所得到的裂缝宽度缩小为0到1.8 mm。结论认为,近井地带的裂缝有利于改善油藏的波及效率。在聚合物溶液注入期间,这些裂缝可以有效增加注入指数,同时增加生产井的采油指数并缓解聚合物的机械降解。
Based on numerical simulation and core flooding tests, combining with the practical data from pilot sites, it is believed that fractures occur between some injectors and producers in the research area. The fractures width changes from 1.4mm to 5.0mm during polymer injection, and it decreases from 0 to 1.88mm during the subsequent water injection after polymer flooding, According to the research results, these near well bore fractures can improve the sweep efficiency of reservoirs. They can effectively increase oil productivity index and control the mechanical degradation of polymer.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2007年第5期102-105,共4页
Petroleum Geology & Oilfield Development in Daqing
关键词
裂缝
窜流
聚合物驱
注入指数
生产指数
fractures
channeling
polymer flooding
injectivity index
production index
