西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (5): 107-113.

• 石油与天然气工程 • 上一篇    下一篇

中低渗油藏化学驱方案优化与矿场对比评述

饶良玉,韩冬,吴向红,王强   

  1. 中国石油勘探开发研究院,北京海淀100083
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-10-01 发布日期:2012-10-01

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

Rao Liangyu, Han Dong, Wu Xianghong, Wang Qiang   

  1. Research Institute of Petroleum Exploration & Development,PetroChina,Haidian,Beijing 100083,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-10-01 Published:2012-10-01

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。

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

Abstract: 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.

Key words: mid-low permeability sandstone reservoir, chemical flooding, numerical simulation, optimization design, highwater cut stage