Coupling Effects of Natural and Hydraulic Fractures in Low Permeability Reservoir
In low permeability reservoirs natural fractures are usually developed to provide certain path for hydrocarbon migration. However, because of nonuniform and non-continuous distribution of fractures, seepage networks cannot be formed. Hydraulic fractures can increase the drainage area, improve the flowing characteristics and enhance well productivity. Therefore, research on the coupling between nature fractures and hydraulic fractures in low permeability reservoir presents significantly applicable value for the law of fluid flow. Base on the equivalent continuous medium theory, equivalent continuum model of low permeability reservoir with fractures is established, to study the flow principles in fractured vertical well in the equivalent continuous medium model. The results show that the coupling between natural fractures and hydraulic fractures can enhance oil well productivity and aggravate the anisotropy degree of reservoir, which lengthens the major axis of elliptical pressure wave and shorten the minor axis.
Low permeability reservoir Natural fracture Hydraulic fracture Continuous medium coupling Pressure distribution
ZENG Baoquan CHENG Linsong ZHANG Zheng
College of Petroleum Engineering, China University of Petroleum, P.R.China, 102249
国际会议
成都
英文
181-185
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）