NORMAL EFFECTIVE STRESS INFLUENCE ON PERMEABILITY ENHANCEMENT FOR CARBONATE RESERVOIRS
Natural fracturing for carbonate reservoirs is one of the most significant factors affecting the oil and gas production. The permeability depends on the density and fracture orientation with respect to the current stress state. In terms of the state of stress, conductive fractures are often critically stressed. Secondary processes promote healing and cementing cracks in the course of geological time, and therefore require an approach by which it will be possible to evaluate - which the cracks are hydrodynamically active and which are not. The author conducted geomechanical analysis of data on wells of the Timan-Pechora oil and gas basin. The results of evaluation of the current stress state of rocks and dependent from stress conductivity of fractures are presented in this article.