Finite element simulation on percolation of low permeability reservoir with permeability anisotropy

作     者：ZHI Qingong ZHAO Yizhong CHENG Yuanfang SUN Dexu DU Peng 

作者机构：College of Petroleum EngineeringChina University of Petroleum Oil Production Research InstituteShengli Oilfield 

出 版 物：《Global Geology》 (世界地质（英文版）)

年 卷 期：2012年第15卷第4期

页      面：265-269页

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：anisotropy low permeability percolation finite element simulation 

摘      要：In low permeability porous media which permeability anisotropy is ubiquitous,the percolation of fluid no longer follows linear Darcy’s ***-water two phase flow equation of low permeability reservoir with permeability anisotropy is established based on generalized Darcy’s law and starting pressure gradient,corresponding finite element program is developed and simulated based on the Finite Element Program Generator system (FEPG).The results show that energy-gathering exists in the flow event of flowing area front in low permeability *** the process of energy-gathering,the flow velocity changed little but increased rapidly as soon as the pressure gradient exceeded the starting pressure gradient of the reservoir,then gradually *** greater the starting pressure gradient is,the greater the near wellbore pressure drop is,the smaller the area influenced by the reservoir pressure changes caused by water injection and oil *** greater the starting pressure gradient is,the lower the water saturation in same point of the reservoir is,the smaller the water flood swept area *** will be more difficulties in water injection to the same extent.