Hydrodynamic Modeling of the Production of Petroleum Hydrocarbons in the Conditions of Different-Speed Production of Carbonate Reservoirs

About the authors:

Nelli F. Chistyakova, Dr. Sci. (Geol.-Mineral.), Professor, Department of Mechanics of Multiphase Systems, University of Tyumen; geoekologiya@mail.ru

Yuliya M. Onishchuk, Master Student, Department of Mechanics of Multiphase Systems, University of Tyumen; y.m.onishchuk@yandex.ru

Abstract:

A filtration model of carbonate reservoirs of the studied deposit is constructed using the basic geological basis that takes into account the data of field geophysical studies, hydrodynamic studies, and the use of technology of simultaneous separate injection of man-made waters. The possibilities of using the method of hydrodynamic modeling of multi-layer oil fields are observed in studying the features of producing hydrocarbon reserves from reservoirs with significantly different filtration and capacitance properties when they are jointly developed by a single grid using the technology of simultaneous-separate injection of fluids to maintain reservoir pressure. A theoretical study of various development options on models of multiphase filtration of formation water-hydrocarbon fluids in a system of carbonate reservoir rocks with significantly different filtration-capacitive properties using a hydrodynamic model was carried out. The forecast indicators of exploitation of a multi-layer deposit at the final stage of development are calculated. It is shown that during flow of water-hydrocarbon fluids in layer-inhomogeneous permeability layers significant oil reserves remain in the low-permeability inter-well zones of the reservoir. It has been established that a water cone is formed in the bottomhole zones of the wells due to the vertical water flow coming from the flooded high-permeability layer, which prevents the emigration of oil from the low-permeability reservoir to the wellhead. The conclusion is substantiated about the increase in the oil recovery factor due to the transfer of all injection wells of the field to the technology of simultaneous-separate injection of man-made waters.

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