No.3(47),2026 PP.95-112

Neftyanaya provintsiya No. 3(47), 2026

Investigation of changes in reservoir fluid properties and gas saturation during oil and gas field development

R.F. Khisiev, S.A. Dolgih
DOI: https://doi.org/10.25689/NP.2026.3.95-112

Abstract

The article examines patterns of changes in reservoir fluid properties and gas saturation during oil field development. Laboratory and computational methods for determining fluid properties are systematized. Examples are used to compare traditional research methods with approaches that extend them through machine learning, consideration of two-phase fluid withdrawal, and joint interpretation of time-lapse seismic surveys and field observations. The advantages, limitations, and validation requirements are identified for each example. An integrated monitoring workflow is proposed, comprising historical data preparation, physics-based model calibration, assessment of the current reservoir state, and independent forecast validation. The need to assess the reliability of PVT parameters and gas saturation estimates separately is substantiated.

Key words:

reservoir fluids, gas saturation, PVT studies, fluid properties, machine learning, field data, oil field development monitoring

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Authors

R.F. Khisiev, postgraduate student of the Department of Development and Operation of Hard-to-Recover Hydrocarbon Fields, Institute of Geology and Petroleum Technologies, Kazan (Volga Region) Federal University
ORCID: 0009-0007-3882-1508
88 Telman St., Almetyevsk, 423462, Russian Federation
E-mail: khisiev.rf@gmail.com

S.A. Dolgih, Candidate of Technical Sciences, Associate Professor of the Department of Development and Operation of Hard-to-Recover Hydrocarbon Fields, Institute of Geology and Petroleum Technologies, Kazan (Volga Region) Federal University
ORCID: 0000-0002-5469-7320
4/5 Kremlevskaya St., Kazan, 420111, Russian Federation
E-mail: dolgih_s_a@mail.ru

For citation:

R.F. Khisiev, S.A. Dolgih Izucheniye zakonomernostey izmeneniya svoystv plastovykh flyuidov i gazonasyshchennosti v protsesse razrabotki neftegazovykh mestorozhdeniy [Investigation of changes in reservoir fluid properties and gas saturation during oil and gas field development]. Neftyanaya Provintsiya, No. 3(47), 2026. pp. 95-112. DOI https://doi.org/10.25689/NP.2026.3.95-112. EDN ZUCFCN (in Russian)

© Non-governmental organization Volga-Kama Regional Division of the Russian Academy of Natural Science, 2015-2026 All the materials of the journal are available under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/)

Investigation of changes in reservoir fluid properties and gas saturation during oil and gas field development R.F. Khisiev, S.A. Dolgih DOI: https://doi.org/10.25689/NP.2026.3.95-112

Key words: reservoir fluids, gas saturation, PVT studies, fluid properties, machine learning, field data, oil field development monitoring

Investigation of changes in reservoir fluid properties and gas saturation during oil and gas field development

R.F. Khisiev, S.A. Dolgih
DOI: https://doi.org/10.25689/NP.2026.3.95-112

Key words:

reservoir fluids, gas saturation, PVT studies, fluid properties, machine learning, field data, oil field development monitoring