油气地质与采收率2017，Vol.24Issue(6)：65-71,7.
基于均衡驱替的低渗透油藏直井压裂缝长优化方法
Optimization method of fracture length of vertical wells in low-permeability reservoirs based on the equilibrium displacement
摘要
Abstract
Relatively regular areal well pattern has been applied in most oilfields nowadays.But under the influence of res ervoir heterogeneity,the development effect of different oilfields varies a lot.To solve this problem,a method of artificial fracturing for oil wells in low permeability zone was proposed,which aims to achieve the purpose of equilibrium displacement in well patterns.Targeting on the rectangular five-spot well pattern,the calculation formulas of water breakthrough time in the fractured oil well and the non-fractured oil well were derived.Besides,aiming at the target that the injected water reaches to different oil wells at the same time,a calculation method of the optimal fracture half-length of the fractured well in the low permeability zone of heterogeneous reservoir was established on the basis of stream line integral method and equivalent well diameter method.The influence of the permeability ratio,well spacing,the difference betwecn two injection-production pressure differences and the fracture conductivity on the optimal fracture half-length was analyzed.The optimal fracture half-Iength decreaSes with the difference between two injection-production pressure differences and fracture conductivity.However,when the permeability rati6 and the well spacing are large,the required optimal fracture half-length will be relatively long.关键词
低渗透油藏/矩形五点井网/见水时间/裂缝半长/均衡驱替Key words
low-permeability reservoir/rectangular five-spot well pattern/water breakthrough time/fracture half-length/equilibrium displacement分类
能源科技引用本文复制引用
崔传智,丰雅,张传宝,吕广忠,隋迎飞..基于均衡驱替的低渗透油藏直井压裂缝长优化方法[J].油气地质与采收率,2017,24(6):65-71,7.基金项目
国家科技重大专项“胜利油田特高含水期提高水驱采收率技术”(2016ZX05011-002). （2016ZX05011-002）
