渗流启动压力梯度对低渗透油田五点井网面积波及效率影响  

Effects of seepage threshold pressure gradient on areal sweep efficiency for five-spot pattern of low permeability reservoirs

作　　者：郭粉转[1] 唐海[1] 吕栋梁[1] 曹峰[2] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]中国石油天然气集团公司管材研究所,陕西西安710065

出　　处：《大庆石油学院学报》2010年第3期65-68,共4页Journal of Daqing Petroleum Institute

基　　金：国家科技重大专项(2008ZX05013-005)

摘　　要：根据低渗透油藏五点井网注水开发的特点,在流管模型和Beckley-Leverett方程的基础上,推导出考虑启动压力梯度的五点井网面积波及效率计算公式和油井见水时间的计算公式.利用油田实际生产数据进行计算分析,解决了低速非达西渗流不同于达西渗流的面积波及效率理论计算问题和生产井见水时间的确定问题.该方法可用于定量表征五点井网条件下储层的动用程度,为低渗透油藏开发设计和评价提供理论依据.The Areal sweep efficiency formula and water breakthrough time formula of considering the start-up pressure gradient are presented for the five-spot well pattern,which is by means of characteristics of five-spot water flooding exploitation in low-permeability reservoir and on the basis of stream tube model and the Beckley-Leverett equation.According to calculation and analysis results by actual oil production data,this theory solve the theoretical calculation problem of production well breakthrough time and areal sweep efficiency on the state of low-speed non-Darcy seepage flow different from Darcy seepage flow.This method can be used for quantitative characterization of reservoir produced degree in five-spot pattern and provide theory basis for development and evaluation of low-permeability reservoir.

关 键 词：渗流启动压力梯度 面积波及效率 见水时间 五点井网 低渗透油藏 

分 类 号：TE348[石油与天然气工程—油气田开发工程]