Laboratory measurement of Biot’s coefficient and pore pressure influence on poroelastic rock behaviour

摘要: Understanding rock behaviour as a function of pore pressure and confining is crucial for petroleum geomechanical analysis. Indeed, deformation local stress variations within hydrocarbon reservoirs their surroundings occur due to changes. Theoretically, changes coupled with in are the Biot’s coefficient, elastic properties reservoir shape. Thus, this study, coefficient was measured porosity, permeability, volumetric strain five Gosford sandstone samples. A triaxial loading system used measure while were varied. The constant technique employed these experiments; i.e. variation created strain, required restore original calculate coefficient. For investigated samples, liquid permeabilities range 7–10 mD coefficients 0.84–0.91. This consistent similar investigations by other researchers which 0.65–0.90. study thus illustrates how permeability decrease pressure.