石油钻采工艺2017，Vol.39Issue(2)：146-150,5.DOI:10.13639/j.odpt.2017.02.004
低渗透油藏垂直裂缝井产能预测及分析
Prediction and analysis on productivity of vertically fractured wells in low-permeability oil reservoirs
摘要
Abstract
Fracturing stimulation technology is widely applied in the development of low-permeability oil reservoirs, and the stimu-lation effect of different fracturing plans is different. To realize the expected stimulation effect, it is of great significance to optimize fracturing design by researching the postfrac productivity. In this paper, a seepage model combining radial flow with bilinear flow was established for vertically fractured wells in low-permeability oil reservoirs according to the permeability characteristics of formations around vertically fractured wells. Then, the productivity formulas of infinite-conductivity and finite-conductivity fractures in low perme-ability oil reservoirs were derived to deal with the starting pressure gradient of low-permeability oil reservoirs. The error between the calculation result of finite-conductivity fracture productivity formula and the field data is lower than 7%. Productivity curves for different influential factors were plotted on the basis of the basic parameters of thick conglomerate oil reservoir with extra low permeability in a certain block of the Junggar Basin, and then they were analyzed. It is shown that the fracture conductivity can't be approximated as the infinite conductivity until it reaches a certain value, or the error will be higher. In order to realize the expected stimulation effect in the current economic conditions, all fracturing parameters shall match reservoir conditions.关键词
低渗透油藏/产能/径向流/双线性流/垂直裂缝/启动压力梯度Key words
low-permeability oil reservoir/productivity/radial flow/bilinear flow/vertical fracture/starting pressure gradient分类
能源科技引用本文复制引用
周杨,李莉,吴忠宝,甘俊奇,王俊文,刘翀..低渗透油藏垂直裂缝井产能预测及分析[J].石油钻采工艺,2017,39(2):146-150,5.基金项目
国家科技重大专项大型油气田及煤层气开发"低渗-超低渗油藏有效开发关键技术"课题六"低渗、特低渗复杂油藏规模有效动用关键技术"(编号:2017ZX05013-006). （编号:2017ZX05013-006）
