各向异性低渗透油藏整体压裂后的压力计算单元  

Pressure Calculation Element Selection Following Overall Hydraulic Fracturing in Anisotropy Low Permeability Reservoirs

作　　者：程远方[1] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061

出　　处：《新疆石油地质》2010年第6期607-609,共3页Xinjiang Petroleum Geology

基　　金：国家863计划项目(2007AA06Z208)

摘　　要：基于广义达西定律建立了各向异性低渗透油藏油水两相渗流方程,模拟研究了储集层各向异性对整体压裂后压力计算单元选取的影响,研究发现常规单元选取方法误差较大。在考虑渗透率各向异性及人工裂缝任意转角等因素的基础上,提出了五点、九点、反九点井网整体压裂后压力计算单元的选取方法,模拟表明,计算单元选取合理,单元内重点分析井计算精度高,为指导复杂的各向异性低渗透油藏整体压裂措施提供了重要的理论依据。The oil and water two-phase flow equation is established based on generalized Darcy＇s law,with which the effect of permeability anisotropy on the pressure calculation element selection after whole hydraulic fracturing is simulated and it is found that obvious errors may exist by conventional element selection method.Considering the formation permeability anisotropy and artificial fracture arbitrary angles,etc.,a new method for such a selection suitable for five-spot,nine-spot and inverted nine-spot well patterns is proposed.The simulation indicates that calculation element selection is reasonable and the important analyzing wells within the element are of high calculating accuracy,which provides theoretic reference for complex anisotropy low permeability reservoir development by whole hydraulic fracturing process.

关 键 词：低渗透油藏 各向异性 压裂 计算单元 模拟 

分 类 号：TE331[石油与天然气工程—油气田开发工程]