Experimental evaluation of compressibility coefficients for fractures and intergranular pores of an oil and gas reservoir

The paper is devoted to studies of the volumetric response rocks caused by changes in their stress state. Changes volume fracture and intergranular components pore space based on measurements fluid extruded from a rock sample with an increase its all-round compression have been experimentally obtained analyzed. Determination porosity authors' earlier proposed method calculation using values longitudinal wave velocity total porosity. results experimental analytical two (intergranular fractured) under action effective stresses are considered. This approach allowed authors estimate magnitude range compressibility both pores fractures representative collection 37 samples Vendian-age sand reservoir Chayanda field. separate estimation coefficients proposed, dependence pressure obtained. It determined that knowledge will reliability estimates petrophysical parameters oil gas reservoirs state during development hydrocarbon fields.