«Geology, geophysics and development of oil and gas fields»

Determination of the effectiveness of the reservoir pressure maintenance system of the Verey-Bashkir deposits by the method of ground microseismic monitoring

UDC: 622.276.1/.4(470.41):622.276.43
DOI: 10.33285/2413-5011-2023-7(379)-61-68

Authors:

¹ LLC management company "Sheshmaoil", Almetyevsk, Russia
² Tyumen Industrial University, Tyumen, Russia

Keywords: injection well, ground microseismic monitoring, filtration channels, carbonate reservoir, natural fracturing

Annotation:

The article presents the data on cyclic fluid injection into injection wells to determine the effectiveness of the reservoir pressure maintenance system in fractured carbonate reservoirs of the Verey-Bashkir deposits of the Dachnoye field in the Republic of Tatarstan. To identify filtration channels, as well as to assess the activity of natural fracturing, the method of ground microseismic monitoring was used. According to the results of the work performed, a good correlation of the fluid movement directions in the reservoir with the directions of fracturing and maximum horizontal stress was traced. Taking into account the presence of filtration channels outlets into the marginal part of the deposit as well as the operation of wells on two horizons, the percentage of water loss in the deposit marginal area and the percentage of the injected fluid distribution between the horizons were predicted.

The presence of decompacted zones coinciding by their location in the Verey and Bashkir deposits indicates a unified system of fractures for the entire studied stratum, thus allowing consideration of the Verey-Bashkir deposits as a single development object in this area.

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