Oil & Gas Geology ›› 2008, Vol. 29 ›› Issue (3): 391-396,404.doi: 10.11743/ogg20080317

Previous Articles     Next Articles

Study on the coupling of seepage and stress fields in low-permeability reservoirs

Zhou Zhijun, Li Jing, Liu Yongjian, Song Kaoping, Liu Weiwei, Li Xiaofeng   

  1. Department of Petroleum Engineering, Daqing Petroleum Institute, Daqing, Heilongjiang 163318, China
  • Received:2008-02-05 Online:2008-06-24 Published:2012-01-16

Abstract:

Mathematical and numerical coupling models of seepage and stress fields of low-permeability reservoirs are developed based on the basic theories of rock mechanics,fluid mechanics in porous medium,geologic mechanics,computational mechanics and fluid-solid coupling seepage,and etc,and by taking into consideration of their start-up pressure gradient of seepage flow and characters of fluid-solid coupling.A program is designed by using numerical computing method of coupling with finite difference and finite element integrated,and the coupling law of seepage and stress fields in low-permeability reservoirs is studied.The varying law of stress-strain with time and space,dynamic changing law of rock physical properties,changing pattern of development index in the process of natural depletion of single well are studied through numerical simulation and correlated with the calculation of rigidity model.It is revealed that the fluid-solid coupling effect in low permeability reservoirs is rather obvious.

Key words: seepage field, stress field, fluid-solid coupling, mathematical model, numerical simulation, low-permeability reservoir

CLC Number: