METHODS FOR ASSESSING THE CHARACTERISTICS OF OIL RESERVES WITH FUZZY GEOLOGICAL INFORMATION AND DEVELOPMENT OF OIL FIELDS
Urazgaliyeva M.K. Bayamirova R.Y. Bissembayeva K.T. Sabyrbayeva G.S. Bekbauliyeva A.A.
2023National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2023#1Issue 457211 - 225 pp.
The problems arising in the development of models to assess the characteristics of oil deposits due to the vagueness of the initial geophysical, geological information, which is an urgent problem of oil production, have been studied and a method for solving thereof based on expert evaluation methods and theories of fuzzy sets has been proposed. Mathematical formulation of the problem of multi-criteria optimization of oil fields development processes in a fuzzy environment has been developed by modifying the various principles of optimality for fuzziness. On the basis of the developed models the approach to the solution of the formulated problem of multicriteria optimization of development processes with fuzzy criteria and constraints has been proposed. The paper describes the main phases of the proposed method for solving the problems of identifying oil deposits with fuzzy geophysical information. Two-dimensional and multidimensional relations between the reservoir factor and the structure factor with the main fuzzy geophysical characteristics have been obtained from experts in form of their knowledge, experience and intuition in natural language. Whereas these relations have been established on the basis of a modified multiple regression method. Structural identification of fuzzy and linguistic models, which allow to describe the scope, oil composition and porosity of the oil deposit, has been carried out. A description of the proposed methodology for the identification of fuzzy parameters of fuzzy models based on the α level set has been given. Various modified principles of optimality have been used for formalization and mathematical statement of the task of multi-criteria optimization of the oil deposits development process in a fuzzy environment and the approach to solving thereof has been proposed. The obtained results of the research allow to formulate and obtain solutions to the problems of oil reservoir simulation and optimization of the oil field development process under the conditions of fuzzy source data and indicators.
fuzzy geological information , oil field development , Oil reservoirs , reservoir factor , structure factor
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Caspian University of Technology and Engineering named after Sh. Yessenov, Aktau, Kazakhstan
Caspian University of Technology and Engineering named after Sh. Yessenov
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