Experimental study of deformation and filtration processes in low-permeability reservoir rocks of Achimov deposits when implementing the method of directional unloading of the reservoir

The article describes the studies of rheological and filtration characteristics of low-permeability rocks of the Achimov deposits of the Urengoy gas-condensate field in the course of modeling the implementation of the method of directional unloading formation. The experiments were carried out on the Triaxial Independent Load Test System (TILTS) at the Institute for Problems in Mechanics of the Russian Academy of Sciences. The results of physical modeling of actually occurring stresses in the vicinity of the wells during application of the method of directional unloading formation are presented. The statistical analysis of the influence of the creep process on the permeability of the rocks under study is carried out. The patterns of changes in the filtration characteristics of the studied rocks of the Achimov deposits during the simulation of the implementation of the method of directional unloading are established. Based on the experimental studies, conclusions were made about ways of preventing negative processes in reservoirs and ways of increasing well productivity were outlined.