Queries to the viewpoint——low permeability reservoirs have not the characteristics of strong stress sensitivity

Experimental data shows that low permeability reservoirs are more stress sensitive than high permeability reservoirs,however,Professor Li Chuanliang thinks there are something wrong with the experimental data,which is caused by system errors of the experimental equipments.He thinks that low permeability reservoirs should not be more stress sensitive than high permeability reservoirs,because the rocks of low permeability reservoirs are more compact than that of high permeability reservoirs.This paper had some queries to Professor Li’s viewpoint.The first,rock’s pore compressibility is different from rock pore compressibility;the second,there is a logical error with the rock compressibility formula adopted by Professor Li;the third,system errors of experimental equipment are not as large as Professor Li thought.In addition,permeability is a functional parameter,and it is relative not only to the rock properties but also to the fluid properties.Thus,stress sensitivity can not be estimated simply from the point of view of solid mechanics.