PROBLEMS OF EVALUATION OF THE EFFICIENCY OF THE STIMULATION OF LOW-PERMEABILITY RESERVOIRS OF HYDROCARBONS

Abstract

The article discusses the conditions for the formation of hydrocarbon deposits and their changes during the development of lowpermeability reservoirs, as well as the most effective technologies for developing deposits of this type, which help increase the coverage of residual hydrocarbon reserves. Low-permeability reservoirs are susceptible to foreign fluid damage, so it is necessary to continuously reduce damage throughout the fracturing process through the use of optimized fluid systems and process parameters. The most effective technologies are: the use of horizontal wells with multi-stage hydraulic fracturing, which ensures the largest volume of hydrocarbon recovery at the initial stage, the use of multilateral wells with branched horizontal ends when it is impossible to use multi-stage hydraulic fracturing. To increase the connectivity of flow channels and provide increased hydrocarbon production, the multi-stage hydraulic fracturing process damages low-permeability reservoirs. The fracture extends in height and length over tens of meters and, thanks to this, can provide hydrodynamic connection to formation zones remote from the perforation interval. Thus, the need for well research methods that are capable of recording formation performance regardless of the position of the secondary opening (perforation) interval is relevant