«Oilfield engineering»

Hydrodynamic modeling of hydrocarbon gases cyclic injection into the Upper Jurassic deposits using a downhole heater to enhance oil recovery of formation

UDC: 622.276.43"5"
DOI: 10.33285/0207-2351-2023-10(658)-29-34

Authors:

¹ LUKOIL-Engineering, Moscow, Russia

Keywords: cyclic treatment, the Upper Jurassic deposits, downhole heater, synthetic oil, thermal destruction of kerogen, technological potential, hard-to-recover reserves

Annotation:

The search for an efficient and cost-effective technology of hard-to-recover hydrocarbons development is an urgent task for developing the oil-bearing potential of oil source suites. It is believed that the oil content of the Upper Jurassic deposits of the Western Siberia is associated with two types of rocks: porous and porous-fractured carbonate-siliceous rocks similar to classical reservoirs and low-permeable carbonaceous-argillaceous-carbonate-siliceous rocks. This article is devoted to the second type of rocks and approaches to their studying and modeling.

The article presents the results of multivariate calculations of thermal impact processes on the Upper Jurassic rocks, carried out on a sector model that reproduces the process of downhole heating of the Upper Jurassic deposits, leading to the extraction of the generated synthetic oil by a hydrocarbon solvent. The problem to be solved in such a way is the selection of conditions for conducting field tests of a new technology.

As part of the calculations, several variants of the composition of the injected hydrocarbon solvent in the gas phase were tested. Analysis of the results showed that the optimal injected fluid is rich hydrocarbon gas. In combination with rock heating, its use leads to the best effect in terms of increasing oil production.

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