Известия Томского политехнического университета: Инжиниринг георесурсов (Feb 2023)
REVIEW AND ANALYSIS OF TECHNOLOGIES INCREASING THE EFFICIENCY OF OIL RECOVERY FROM BAZHENOV FORMATION RESERVOIRS
Abstract
The relevance. According to the resource potential estimates, the Bazhenov formation has great potential and it is characterized by unique properties that make it difficult to develop. Nowadays, there is no single concept for development of hard-to-recover hydrocarbon deposits. Therefore, the cost-effective development of the Bazhenov formation resources is associated with the creation of effective methods for increasing oil recovery and oil well stimulation. The main aim: summarization and analysis of scientific and technical literature regarding to advanced technologies for enhanced oil recovery and well stimulation at conditions of the Bazhenov formation and foreign shale deposits with similar characteristics and properties. Objects: technologies increasing the efficiency of oil recovery from the Bazhenov formation reservoirs or other formations with similar characteristics, including thermal, gas, chemical and combined methods of enhanced oil recovery, hydraulic fracturing, acid treatment; results of laboratory experiments, physical and mathematical modeling, pilot tests of the considered technologies. Methods: analysis of domestic and foreign literature and patent information relating to technologies for the development of hard-to-recover hydrocarbon deposits. Results. Characteristics and description of reservoir stimulation mechanisms using the most common methods of enhanced oil recovery, hydraulic fracturing, acid treatments and their combined technologies are given. On the example of the pilot field and laboratory tests results, the effect obtained from the reservoir stimulation at different deposits is described. It is noted that advanced technologies are combined methods, including techniques using chemical reagents. The efficiency of technological fluids at the Bazhenov formation can be increased with complex chemical systems containing various organic solvents and surfactants.
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