超低渗透油藏注水方式研究  

Study on water injection in ultra low permeability reservoir

作　　者：李南[1] 程林松[1] 陈泓全[1] 田虓丰[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《油气地质与采收率》2012年第4期78-80,116,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"鄂尔多斯盆地大型岩性地层油气藏勘探开发示范工程"(2008ZX05044);国家科技重大专项"海上稠油水驱及注聚开发方式下不同井型生产能力与注入能力评价方法研究"(2011ZX05024-002-006)

摘　　要：从超前注水的机理入手,结合数值模拟与实际动态,对比了不同注水时机下油水井间的压力剖面,优选了超低渗透油藏的注水时机,并在最优注水时机下,分析了不同注水方式对地层压力波及范围的影响; 基于超低渗透油藏具有启动压差大、应力敏感性强、孔喉细小等特性,分析了不同超前注水方式下油井和水井压力升幅和压力波及范围,在岩石不破裂的情况下,进行不同超前注水方式的筛选与组合,反阶梯温和注水能够得到最优的开发效果。以长庆油田BMZ区块为例,进行了不同注水方式的开发效果分析,当采用反阶梯温和注水时,预测平均单井产油量在前20个月都明显高于非超前注水。This article starts from the mechanism of advanced water injection, combining with the numerical simulation and actual production data, it contrasts the pressure profiles between the water injection well and oil well under the different water injection timing, then, optimizes the water injection timing in ultra low permeability reservoirs, and under the optimal water injection timing , it analyzes the effect on transmission of pressure by different ways of advanced water injection. Based on low permeability reservoirs property of start-up pressure gradient, stress the sensitive, thin pore throats, we analyze the effect on the lifting amplitude of oil wells, water wells and reservoir pressure by the different ways of advanced water injection. At the condition of the maximum of spread coefficient and under the rock breakdown pressure, screening and combining different ways of advanced water injection, we found that, it could be able to get the best development performance in ultra low permeable reservoir by anti-step mild water injection. Taking Changqing BMZ oilfield as example, the development effect has been analyzed under different water injection, and we evaluated the development effect of the method of anti-step mild water injection, which has certain directive significance to make the technology policy.

关 键 词：超低渗透油藏 超前注水 阶梯注水 温和注水 反阶梯温和注水 压力剖面 

分 类 号：TE341[石油与天然气工程—油气田开发工程]