摘要
聚合物注入时机会影响水驱后提高石油采收率效果。针对中孔、中渗、强非均质性这一类典型油藏,运用数值模拟与物理模拟实验相结合的方法,研究了注聚时机对聚合物驱油效果的影响规律。结果表明,对于中孔、中渗、强非均质性油藏,在实际矿场生产时间内,注聚时机越早,原油采收率越高。在不同的含水率阶段,注聚时机对提高原油采收率效果影响不同;在极限开采情况下,采收率随注聚时机延迟,几乎呈单调递减趋势。早期注聚可以延长无水采油期。注聚时机越早,采油速度越大。
Polymer injection time affected displacing efficiency of polymer flooding after water flooding.The effectiveness of polymer flooding at various injection times for a typical reservoir was researched(medium porosity,medium permeability and strong inhomogeneity) by physical experiments and numerical simulation methods.The results indicate that during practical field production period,the earlier the injection time is,the higher the oil recovery is.The influence of injection time on enhanced oil recovery varies with production stage.At ultimate condition,oil recovery almost decreases monotonously along with the delay of injection time.In addition,earlier polymer injection can expand water free oil production period.The oil production rate is higher if polymer is injected earlier.
出处
《石油天然气学报》
CAS
CSCD
2012年第2期136-138,143,共4页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2008ZX05024-002)
关键词
注聚时机
采收率
采油速度
响应时间
典型油藏
polymer injection timing
oil recovery factor
oil production rate
response time
typical reservoir
