中低渗油藏化学驱方案优化与矿场对比评述  

Research and Field Comparison Comments on Chemical Flooding Scenario Design in Mid-low Permeability Reservoir

作　　者：饶良玉[1] 韩冬[1] 吴向红[1] 王强[1] 

机构地区：[1]中国石油勘探开发研究院,北京海淀100083

出　　处：《西南石油大学学报（自然科学版）》2012年第5期107-113,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：以某中低渗砂岩油藏P区块为例,为提高其高采出程度、特高含水阶段油藏采收率,在油藏工程、油藏精细描述及物理模拟研究的基础上,运用三次采油数值模拟技术开展化学驱方案优化设计研究,设计了24个聚合物驱方案、30个聚合物/表面活性剂驱方案和33个三元复合驱方案,用全因素优化方法对注采参数和注入方式进行优化。研究结果表明,主段塞保持相对较高的化学剂浓度和PV数有利于提高采收率,适量增加高浓度聚合物前置段塞和低浓度聚合物后置段塞有利于保证化学驱的增油效果,优化方案为采用"阶梯四段式"注入方式的聚合物/表面活性剂驱方案,试验区提高采收率11.62%。与已实施的主要化学驱试验相比,油藏条件、聚合物黏度、井网井距及注入量等的差异是产生化学驱开发效果差异的关键因素。To enhance oil recovery factor in the stage of high recovery factor and ultra-high water-cut,taking a mid-low permeability sandstone reservoir Block P for example,and based on the study of reservoir engineering,detailed reservoir description and physical simulation,we carry out the study of the scenario deign of chemical flooding with 24 polymer flooding,30 surfactant/polymer flooding and 33 alkaline/surfactant/polymer flooding scenarios,optimize production parameters and injection style by full factor optimization method.The results show that relative high inject rate and volume of major plug is benefit to enhance oil recovery,and add suitable high concentration polymer pre-slug and low concentration post-plug to augment production.The optimized scenario is surfactant/polymer flooding using stepped four-slug inject style,which can increase recovery factor of 11.62%.Compared with the existing major chemical flooding field tests,reservoir condition,polymer viscosity,well spacing and inject volume are the major controlling factors of chemical flooding.

关 键 词：中低渗砂岩油藏 化学驱 数值模拟 优化设计 高含水期 

分 类 号：TE357[石油与天然气工程—油气田开发工程]