Using the Results of Differentiation and Grouping of Deposits to Solve the Problems of Developing Carbonate Reservoirs in the Volga-Ural Oil and Gas Province

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Abstract

The relevance of the topic chosen for the study is due to the widespread need to solve development tasks within the framework of the implementation by the subsurface user of high-level monitoring and control of oil recovery processes in fields with a complex geological structure in order to make timely and effective management decisions. Using the complex results of differentiation and grouping of deposits in the Volga-Ural oil and gas province, confined to the carbonate reservoirs of the Lower Carboniferous system, the relevance of the parameters characterizing the key geological and physical characteristics of productive formations and saturating fluids was assessed. Using the hierarchy analysis method in the nonlinear system under study, formed after calculating the percentage of correctly grouped objects and the values of the main components, a rating of potential N field parts containing residual oil reserves promising for involvement in the drainage and development process was formed. By calculating the priority vector for both one of the parameters and for their combination with each other, qualitative results were obtained that make it possible to effectively build a strategy to increase the oil recovery coefficient by taking into account the hierarchy level of the six main indicators when planning or modeling the design of geological and technical measures, including in specialized software. This, in turn, leads to the formation of an alternative view on the study of the degree of mutual influence of the main geological and physical characteristics of productive formations with each other under various boundary conditions formed as a result of continuous processes in the borehole-formation system. The objectivity of the revealed patterns has been successfully confirmed within the framework of point comparison and comparison with the available results of geophysical and hydrodynamic studies of wells, screening and analysis of key technological parameters for the development of liquid hydrocarbon deposits, which significantly increases the scope of the results in solving the problems of developing mature fields.

Keywords

carbonate reservoirsfield developmenttectonic-stratigraphic confinement of objectswell stimulationgeological and statistical modelinghierarchy analysis methoddiscriminant analysisprincipal component methodcontrol and regulation of oil production processesmonitoring of residual oil reservesranking of areas of accumulation of liquid hydrocarbons prospectv for development.

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Article information

Published
30 March 2024
Issue date
30 March 2024
Issue
Vol. 23, No. 4 (2023)
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