The article is devoted to the regularities of the propagation of self-induced hydraulic fracturing cracks in the process of injection of the displacement agent into the formation in order to maintain reservoir pressure. Technogenic and petrological factors have a significant impact on the processes of initiation, propagation and degradation of self-induced hydraulic fracturing cracks. In modern oil and gas field practice, we are just beginning to use geomechanical simulators for private calculations and have not yet used them in integrated calculations of field development options, nevertheless, the influence of geomechanical processes of the spread of man-made cracks makes a significant contribution to the field development indicators. The aim of the study is a complex of factors that prevent and contribute to the development of self-induced hydraulic fracturing cracks. The study uses the author's methodology for estimating the crack length of a selfinduced hydraulic fracturing depending on the downhole pressure in the injection well. The results of the work have developed a classification of factors influencing the development of self-induced hydraulic fracturing cracks, a quantitative analysis of the differences in the characteristics of the spread of man-made cracks for two deposits with different geomechanical and hydrodynamic properties. The work makes a significant contribution to the understanding of the laws of the development of man-made cracks and has broad prospects for development, allowing us to significantly improve the current 3D digital models and analytical filtration models, which will improve the production of field reserves and increase the value of the oil recovery factor.
Most of Russia's recoverable oil reserves are hard-to-recover reserves. One of the key technologies for the development of these reservoirs is the use of a reservoir pressure maintenance system. The evolution of the development of flood control methods does not stand still. Today, the issue of studying the propagation of self-induced hydraulic fracturing cracks is one of the most important challenges. Over time, as the transition to the development of zones with low permeability values and an increase in down hole pressure in injection wells, the manifestation of the self-induced hydraulic fracturing effect began to be widespread. This was confirmed not only by the dynamics of the water content of products with an increase in the pick-up of neighboring injection wells, but also by hydrodynamic studies of wells, tracer studies, adaptation of the hydrodynamic model taking into account the cracks of the self-induced hydraulic fracturing. Over time, according to the results of studies of geomechanical properties in the deposits of Western Siberia, the direction of the regionally stressed state was established, which coincides with the azimuthal direction of the development of self-induced hydraulic fracturing cracks. Modern development systems take into account the direction of the regional stress state. These systems are mainly located parallel to the cracks of the self-induced hydraulic fracturing to exclude breakthroughs from injection wells to producing wells. Estimation of the parameters of auto-fracturing fractures depending on the injectionmodes is an urgent task that requires the creation of appropriate calculation methods. Control of the waterflood modes for a group of injection wells under conditions of critical bottomhole pressures exceeding the value of the rock fracture pressure is the purpose of this work. A method for estimating the parameters of man-caused fracture from given initial parameters is proposed.
Most of Russia's recoverable oil reserves are hard-to-recover reserves. One of the key technologies for the development of these reservoirs is the use of a reservoir pressure maintenance system. The evolution of the development of flood control methods does not stand still. Today, the issue of studying the propagation of self-induced hydraulic fracturing cracks is one of the most important challenges. Over time, as the transition to the development of zones with low permeability values and an increase in down hole pressure in injection wells, the manifestation of the self-induced hydraulic fracturing effect began to be widespread. This was confirmed not only by the dynamics of the water content of products with an increase in the pick-up of neighboring injection wells, but also by hydrodynamic studies of wells, tracer studies, adaptation of the hydrodynamic model taking into account the cracks of the self-induced hydraulic fracturing. Over time, according to the results of studies of geomechanical properties in the deposits of Western Siberia, the direction of the regionally stressed state was established, which coincides with the azimuthal direction of the development of self-induced hydraulic fracturing cracks. Modern development systems take into account the direction of the regional stress state. These systems are mainly located parallel to the cracks of the self-induced hydraulic fracturing to exclude breakthroughs from injection wells to producing wells. Estimation of the parameters of auto-fracturing fractures depending on the injectionmodes is an urgent task that requires the creation of appropriate calculation methods. Control of the waterflood modes for a group of injection wells under conditions of critical bottomhole pressures exceeding the value of the rock fracture pressure is the purpose of this work. A method for estimating the parameters of man-caused fracture from given initial parameters is proposed.
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