«Equipment and technologies for oil and gas complex»

The effect of forced fluid extraction on the increase in involved oil reserves on the example of terrigenous strata of the Lower Carboniferous

UDC: 622.276.1/4:550.8
DOI: -

Authors:

¹ Tatneft, Almetyevsk, Russia
² Higher School of Petroleum, Almetyevsk, Russia

Keywords: forced fluid extraction, oil fields development, well, oil production, specific growth

Annotation:

Forcing (a significant increase of liquid flow-rate volume) has long been successfully used at most oil fields as a very effective way to increase and maintain profitable oil production levels. However, like all methods, it requires constant analysis to improve its effectiveness for different conditions in practical application. There is a lot of information about the dependence of the rate of oil extraction on the rate of liquid extraction, which in practice can have a significant impact on the results of forcing. The authors of the article performed the following task: to explain the mechanism of the phenomenon of significant oil production increase in conditions of the development of small thickness terrigenous formations in order to determine the possibility of involving additional oil reserves in the development at the deposits of similar composition. The analyzed areas of the Romashkinsky deposit belong to the deposits of the terrigenous Lower Carboniferous (Bobrikovsky horizon), being at the moment at the final stage of their development. To solve the problem, an analytical method was firstly used, in the course of which the authors examined all the active measures carried out at the wells of the target areas, the operating mode dynamics before and after the active measures implementation, etc. as well as a digital model that takes into account algorithms for calculating the filtration process, porosity, permeability, compressibility of the pore space, density, viscosity and gas content of the fluid was used. Thus, having assessed the dynamics of the deposit’s sections operation, the authors came to the conclusion that in this case, the wells with the highest depression developed a more extensive supply circuit as well as, in the authors opinion, reserves were developed from a part of the reservoir with deteriorated reservoir properties, which would remain non-extracted at lower depressions.

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