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Exploring in-situ combustion effects on reservoir properties of heavy oil carbonate reservoir

Petroleum Science 2024年第5期21卷 3363-3378页

作者： Aliya Mukhametdinova Tagir Karamov Strahinja Markovic Andrey Morkovkin Aleksander Burukhin Evgeny Popov Zi-Qi Sun Ren-Bao Zhao Alexey Cheremisin Skolkovo Institute of Science and Technology(Skoltech) Sikorskogo 11Moscow121205Russia State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

Laboratory modeling of in-situ combustion is crucial for understanding the potential success of field trials in thermal enhanced oil recovery(eor) and is a vital precursor to scaling the technology for field applications. The high combustion temperatures, reaching up to 480℃, induce significant petrophysical alterations of the rock, an often overlooked aspect in thermal eor projects. Quantifying these changes is essential for potentially repurposing thermally treated, depleted reservoirs for CO_(2) *** this study, we depart from conventional combustion experiments that use crushed core, opting instead to analyze the thermal effects on reservoir properties of carbonate rocks using consolidated samples. This technique maintains the intrinsic porosity and permeability, revealing combustion's impact on porosity and mineralogical alterations, with a comparative analysis of these properties pre-and post-combustion. We characterize porosity and pore geometry evolution using low-field nuclear magnetic resonance, X-ray micro-computed tomography, and low-temperature nitrogen adsorption. Mineral composition of the rock and grain-pore scale alterations are analyzed by scanning electron microscopy and X-ray *** analysis shows a significant increase in carbonate rocks' porosity, pore size and mineral alterations, and a transition from mixed-wet to a strongly water-wet state. Total porosity of rock samples increased in average for 15%-20%, and formation of new pores is registered at the scale of 1-30 μm ***-temperature exposure results in the calcite and dolomite decomposition, calcite dissolution and formation of new minerals—anhydrite and fluorite. Increased microporosity and the shift to strongly water-wet rock state improve the prospects for capillary and residual CO_(2) trapping with greater ***, these findings highlight the importance of laboratory in-situ combustion modeling on consolidated rock over tests that use crushed core, an

关键词： In-situ combustion thermal eor Carbonates Porosity and pore size MicroCT NMR SEM CO_(2)storage

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A review of enhanced oil recovery(eor)methods applied in Kazakhstan

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Petroleum 2021年第1期7卷 1-9页

作者： Bianca Anne Bealessio Natalia ABlanquez Alonso Nicholas John Mendes Anna Vladimirovna Sande Berna Hascakir Petroleum Engineering Department Texas A&M UniversityUnited States

Application of enhanced oil recovery methods in Kazakhstan has been ongoing for decades alongside the continued discovery of new oil and gas fields in the Pre-Caspian *** objective of this review is to provide an overview of the hydrocarbon reserves and production,and the status of the petroleum industry in Kazakhstan,with a focus on the eor methods and projects being applied to recover those reserves.A summary of the specific eor methods in use was prepared,and existing enhanced recovery projects in Kazakhstan were reviewed and their successes and challenges were *** performance of these projects in the context of eor performance indicators such as capillary number and mobility ratio,as well as operational and environmental issues,were *** for current and potential applications of eor in Kazakhstan were also *** widespread application of thermal eor methods,in use for decades in Kazakhstan’s older fields,was found to be successful,with very favorable impacts on mobility ratio from the addition of thermal energy to the *** eor methods in Kazakhstan have had more limited success,with some significant challenges due to high concentration of hydrogen sulfide in the injected *** injection started in the late 1960s,achieving good results.A recent polymer injection pilot project has shown some promise,with a favorable impact on mobility ratio and oil production,although the project has not yet been expanded beyond two polymer *** results indicate the huge potential of existing and future eor *** review is the first compilation of Kazakhstan’s existing oil and gas reserves,production,and eor project performance,and should be seen as a guide to the existing applications of eor methods in Kazakhstan.

关键词： Kazakhstan thermal eor Sour gas injection Polymer flooding

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Temperature profile estimation:A study on the Boberg and Lantz steam stimulation model

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Petroleum 2020年第1期6卷 92-97页

作者： Mehdi Safari Raoof Gholami Ebrahim Khajehvandi Majid Mohammadi Department of Petroleum Engineering Curtin UniversityMalaysia Department of Petroleum Engineering Amirkabir University of Technology(Tehran Polytechnic)TehranIran Department of Energy Engineering Faculty of ScienceQom University of TechnologyQomIran

Cyclic steam stimulation(CSS)is widely used for production from heavy oil reservoirs where oil viscosity is manipulated by *** analytical models have been developed to predict the temperature evolution in the reservoir and estimate the oil ***,they often suffer from a number of assumptions which ultimately reduce their efficiency in providing a realistic *** this study,a numerical solution was proposed for two-dimensional heat conduction in heavy oil reservoirs to obtain the temperature evolution during the soaking *** a better comparison,an industry widely accepted analytical model,knows as the Boberg and Lantz steam stimulation model,together with its modified version later proposed by Bensten and Donohue were considered to examine temperature changes in a synthetic case *** results obtained indicated that the analytical solutions overestimate the average temperature of the reservoir by 42%after 300 days of injection while the numerical formulation can provide a close *** numerical approach could be a useful tool to estimate the temperature and oil production from heavy oil reservoirs.

关键词： thermal eor Steam stimulation Finite element Boberg and Lantz model Temperature prediction

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