基于油藏—裂缝耦合的低渗油藏水井压裂数值模拟研究  

RESERVOIR-FRACTURE COUPLING NUMERICAL SIMULATION OF INJECTOR FRACTURING FOR LOW-PERMEABILITY RESERVOIRS

作　　者：陈民锋[1] 姜汉桥[1] 

机构地区：[1]中国石油大学石油天然气工程学院

出　　处：《钻采工艺》2009年第2期29-32,共4页Drilling & Production Technology

基　　金："十五"国家科技攻关计划"低渗透油田增产改造关键技术研究"所属专题(2003BA613A-07-05)

摘　　要：利用油藏—裂缝耦合技术,采用对水力压裂裂缝进行矩形网格剖分、与油藏连接处进行PEBI网格剖分相结合的方法,建立油、水两相三维油藏裂缝数值模拟器。利用此数值模拟器,模拟研究了不同条件下水井压裂对注采井组整体开发效果的影响,并利用正交方差分析方法对水井压裂增注效果的主要影响因素进行了显著性评价,提出了适合进行水井压裂增注的油藏条件。以江苏油田H10低渗透断块油藏为例,提出综合效果评价参数,对实际油藏注水井压裂参数设计进行了优化。研究结果为低渗透油藏注水井压裂设计和增注效果评价提供了一种研究手段,对于提高低渗透油田注水效果具有实际意义。A 3D two-phase numerical model based on the reservoir-fracture coupling method is built for fractured reservoirs by adopting the rectangle gridding for hydraulic fractures and the PEBI gridding for reservoir-fracture conjunction.Numerical simulations of effects of injector fracturing under different conditions on development performance were conducted with this model.Significance evaluations of factors contributory to injector fracturing effects were performed by means of the cross covariance analytical method.And the applicability scope of injector stimulation was suggested.H10 reservoir,a low-permeability block reservoir in Jiangshu Oilfield,was simulated to optimize injector fracturing parameters according to the comprehensive effect evaluation indexes presented.The research findings provided a research method for injector fracturing design and effect evaluation of low-permeability reservoirs.

关 键 词：油藏-裂缝耦合 低渗透 水井压裂增注 正交方差分析 参数优化 数值模拟 

分 类 号：TE319[石油与天然气工程—油气田开发工程]