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Prediction of reservoir pressure and study of its behavior in the development of oil fields based on the construction of multilevel multidimensional probabilistic-statistical models

V.I. Galkin, I.N. Ponomareva, D.A. Martyushev

Original article

DOI https://doi.org/10.18599/grs.2021.3.10

73-82
rus.

open access

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Determination of the current reservoir pressure in oil production wells selection zones is an urgent task of field development monitoring. The main method for its determination is hydrodynamic studies under unsteady conditions. At the same time, the process of restoring bottomhole pressure to the value of reservoir pressure often lasts a significant period of time, which leads to long downtime of the fund and significant shortfalls in oil production. In addition, it seems rather difficult to compare reservoir pressures with each other in the wells due to the different timing of the studies, since it is impossible to simultaneously stop the entire fund for measuring the reservoir pressure in the field. The article proposes a new method for determining the current reservoir pressure in the extraction zones, based on the construction of multidimensional mathematical models based on the data of geological and technological development indicators. As the initial data, the values of reservoir pressure, determined during processing of the materials of hydrodynamic studies of wells, as well as a set of geological and technological indicators, probably affecting its value, were used (initial reservoir pressure for each well, the duration of its operation at the time of study, liquid rate, bottomhole pressure, the initial permeability and the current collector in the drainage area, GOR accumulated values oil, and liquid water, and skin factor). In the course of the research, several variants of statistical modeling were used, in the process of which the regularities of the reservoir pressure behavior during the development of reserves were established, individual for the object of development. The obtained models are characterized by a high degree of reliability and make it possible to determine the desired value with an error of no more than 1.0 MPa.
 
statistical analysis, well testing, significance level, well operation, formation permeability, current reservoir pressure
 
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Vladislav I. Galkin
Perm National Research Polytechnic University
29 Komsomolskiy Av., Perm, 614990, Russian Federation

Inna N. Ponomareva
Perm National Research Polytechnic University
29 Komsomolskiy Av., Perm, 614990, Russian Federation

Dmitriy A. Martyushev
Perm National Research Polytechnic University
29 Komsomolskiy Av., Perm, 614990, Russian Federation
e-mail: martyushevd@inbox.ru

 

For citation:

Galkin V.I., Ponomareva I.N., Martyushev D.A. (2021). Prediction of reservoir pressure and study of its behavior in the development of oil fields based on the construction of multilevel multidimensional probabilistic-statistical models. Georesursy = Georesources, 23(3), pp. 73–82. DOI: https://doi.org/10.18599/grs.2021.3.10