西南石油大学学报（自然科学版）2012，Vol.34Issue(1)：147-153,7.DOI:10.3863/j.issn.1674-5086.2012.01.023
低渗透油田反九点井网面积波及效率影响研究
Study of Areal Sweep Efficiency for Invert 9-Spot Pattern of Low Permeability Reservoir
摘要
Abstract
Based on the characteristics of water flooding exploitation in low-permeability reservoir and the stream tube model, and by taking the start-up pressure gradient into consideration, we establish the areal sweep efficiency formula and water breakthrough time formula. The formula help solve the theoretical problem of the calculation of areal sweep efficiency of low-speed non-Darcy seepage flow, which is different from Darcy seepage flow. The results show that the water breakthrough time and areal sweep efficiency of invert 9-spot pattern in low-permeability reservoir are different in borderline well and comer well. It is necessary to adopt a different working system to adjust to the uniformity degree of water flooding in borderline well and corner well. This research provides theory basis for development and evaluation of low-permeability reservoir.关键词
启动压力梯度/低渗透油藏/反九点井网/面积波及效率/见水时间Key words
threshold pressure gradient/ low permeability reservoir/ invert 9-spot pattern/ areal sweep efficiency/ water breakthrough time分类
能源科技引用本文复制引用
吕栋梁,唐海,郭粉转,曹峰,段春林..低渗透油田反九点井网面积波及效率影响研究[J].西南石油大学学报（自然科学版）,2012,34(1):147-153,7.基金项目
国家科技重大专项(2008ZX05013-005). （2008ZX05013-005）
