西南石油大学学报（自然科学版）Issue(3)：53-62,10.DOI:10.11885/j.issn.16745086.2014.11.19.06
致密气藏压裂倾斜缝压力动态分析
Transient Pressure Analysis of Inclined Fracture in Tight Gas Reservoirs
摘要
Abstract
In view of the inclined hydraulic fracture formed by slant well fracturing,the numerical model for fracture flow was derived based on the discrete fracture segments and the analytical model for reservoir flow was established by combining slant plane source function and the superposition principle. A semianalytical model for inclined fracture was developed by coupling the numerical fracture flow model and the analytical reservoir flow model dynamically in this paper. The flow regimes were defined,the corresponding pressure or derivate analytical equations were derived and the effect of reservoir and fracture pa-rameters on transient responses was investigated. The results show that there are five flow regimes including fracture/formation bilinear flow,formation linear flow,early radial flow,pseudo-compound linear flow and later pseudo-radial flow for inclined fracture in the absence of the effect of wellbore storage. The wellbore afterflow caused by wellbore storage may mask the frac-ture/formation bilinear flow. The period of the effect of the inclination angle and permeability anisotropy on transient pressure is very long,which will last to later pseudo-radial flow. The existence and duration of fracture/formation bilinear flow and formation linear flow is only determined by dimensionless fracture conductivity. Finally,a field test in fractured directional well from Suliger Gas Field verified the validity of the model.关键词
斜井筒/压裂倾斜缝/有限导流/耦合模型/压力分析Key words
inclined wellbore/inclined fracture/finite conductivity/couple model/transient pressure analysis分类
能源科技引用本文复制引用
贾品,程林松,李彩云,黄世军,刘红君..致密气藏压裂倾斜缝压力动态分析[J].西南石油大学学报（自然科学版）,2015,(3):53-62,10.基金项目
国家自然科学基金（51174215/E0403）；国家科技重大专项（2011ZX05013002）。 （）
