Development of Approach to Modelling Complex Structure Carbonate Reservoirs using Example of the Central Khoreyver Uplift Fields (Russian)

Yudin, E. V.; Bagmanov, R. D.; Khairullin, M. M.; Solovyev, A. V.; Churanova, Nina Yurevna; Chorniy, A. V.; Fursov, G. A.; Kurelenkov, S. H.

doi:10.2118/187811-ru

SPE Russian Petroleum Technology Conference 2017

DOI: 10.2118/187811-ru

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Development of Approach to Modelling Complex Structure Carbonate Reservoirs using Example of the Central Khoreyver Uplift Fields (Russian)

E. V. Yudin¹,

R. D. Bagmanov²,

M. M. Khairullin³

et al.

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Selection of Effective Surfactant Composition to Improve Oil Displacement Efficiency in Carbonate Reservoirs with High Salinity Formation Water

Kornilov

Zhirov

Petrakov

et al. 2019

Day 2 Wed, October 23, 2019

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The paper includes the scheme of surfactant composition selection and the approach to evaluate potential results of injection for Central-Khoreiver Uplift (CKU) fields with carbonate reservoirs. Several scenarios of surfactant composition injection were studied, using high salinity treated formation water (up to 210 g/l) without applying salinity gradient. The first step of surfactant composition selection included testing of water solution stability in formation water that is characteristic for CKU conditions. Then interfacial tension of surfactant water solution with oil was measured, as well as adsorption properties. The target values of interfacial tension were set in the range around 10-2, and not higher than 10-1 mN/m. Filtration experiments on composite core model were conducted to evaluate the efficnency of selected composition. Development and tuning of linear model for the filtration experiment matched the laboratory results. Obtained parameters are included into the sector model of field development unit, considering the conversion of one of the wells to injection of chemicals. The paper presents preliminary evaluation of technological efficiency for the selected scheme of composition injection. The approach presented in the current paper can be used to plan injection of surfactant-based compositions into carbonate formation with properties that are similar to investigated values. Applying surfactants that are compatible with high salinity formation water makes possible to use treated produced water as injection medium and it decreases the costs of mix water preparation.

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Selection of Effective Surfactant Composition to Improve Oil Displacement Efficiency in Carbonate Reservoirs with High Salinity Formation Water

Kornilov

Zhirov

Petrakov

et al. 2019

Day 2 Wed, October 23, 2019

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Injection of Low-Salinity Water as an Integral Part of Enhanced Oil Recovery Programmes for Carbonate Formations of the Central-Khoreiver Uplift Oilfields

Kornilov

Tkachev

Фомкин

et al. 2021

Day 1 Tue, October 12, 2021

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The paper describes the process of evaluation of low salinity water composition to improve the development of hydrophobic carbonate formations of Central-Khoreiver Uplift (CKU) fields with relatively high oil viscosity (5-15 mPa·s) and average formation temperature 70°C. The sources of low salinity water were determined, prospective composition for water injection were analyzed. The efficiency of oil displacement by formation water and low salinity water are observed during the spontaneous imbibition experiments and coreflood tests to compare the efficiency of formation and low salinity water. The expected incremental displacement efficiency for the target carbonate formations can vary widely, from 1 to 10%. Linear models of the completed coreflood tests and a sector hydrodynamic model of the prospective trial injection are built, considering the basic chemical processes while mixing different types of water. We also review the prospects of joint application of low salinity water injection and chemical EOR methods.

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Development of Approach to Modelling Complex Structure Carbonate Reservoirs using Example of the Central Khoreyver Uplift Fields (Russian)

Cited by 2 publications

References 0 publications

Selection of Effective Surfactant Composition to Improve Oil Displacement Efficiency in Carbonate Reservoirs with High Salinity Formation Water

Selection of Effective Surfactant Composition to Improve Oil Displacement Efficiency in Carbonate Reservoirs with High Salinity Formation Water

Injection of Low-Salinity Water as an Integral Part of Enhanced Oil Recovery Programmes for Carbonate Formations of the Central-Khoreiver Uplift Oilfields

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