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Insights on In Situ Combustion Modeling Based on a Ramped Temperature Oxidation Experiment for Oil Sand Bitumen

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  • Lyudmila Khakimova

    (Center for Hydrocarbon Recovery, Skolkovo Institute of Science and Technology, Sikorsky Street 11, 121205 Moscow, Russia
    Institute of Earth Sciences and Environment, University of Lausanne, 1015 Lausanne, Switzerland
    Faculty of Mechanics and Mathematics, Lomonosov Moscow State University, 119991 Moscow, Russia)

  • Evgeny Popov

    (Center for Hydrocarbon Recovery, Skolkovo Institute of Science and Technology, Sikorsky Street 11, 121205 Moscow, Russia)

  • Alexey Cheremisin

    (Center for Hydrocarbon Recovery, Skolkovo Institute of Science and Technology, Sikorsky Street 11, 121205 Moscow, Russia)

Abstract

The ramped temperature oxidation (RTO) test is a screening method used to assess the stability of a reservoir for air-injection Enhanced Oil Recovery (EOR) and to evaluate the oxidation behavior of oil samples. It provides valuable kinetic data for specific cases. The RTO test allows for the analysis of various characteristics, such as temperature evolution, peak temperatures, oxygen uptake, carbon dioxide generation, oxidation and combustion front velocity, recovered and burned hydrocarbons, and residual coke. The adaptation of RTO experiments to in situ combustion (ISC) modeling involves validation and history matching based on numerical simulation of RTO tests, using 3D digital models of experimental setup. The objective is to estimate the kinetic parameters for a customized reaction model that accurately represents ISC. Within this research, the RTO test was provided for bitumen samples related to the Samara oil region. A 3D digital model of the RTO test is constructed using CMG STARS, a thermal hydrodynamic simulator. The model is designed with multiple layers and appropriate heating regimes to account for uncertainties in the experimental setup and to validate the numerical model. The insulation of the setup affects radial heat transfers and helps to control the observed temperature levels. The modified traditional reaction model incorporates thermal cracking of Asphaltenes, low-temperature oxidation (LTO) of Asphaltenes and Maltenes, and high-temperature combustion of coke. Additionally, the model incorporates high-temperature combustion of light oil in the vapor phase, which is generated through Asphaltenes cracking and LTO reactions.

Suggested Citation

  • Lyudmila Khakimova & Evgeny Popov & Alexey Cheremisin, 2023. "Insights on In Situ Combustion Modeling Based on a Ramped Temperature Oxidation Experiment for Oil Sand Bitumen," Energies, MDPI, vol. 16(18), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6738-:d:1244524
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    References listed on IDEAS

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    1. Yang, Junyu & Xu, Qianghui & Jiang, Hang & Shi, Lin, 2021. "Reaction model of low asphaltene heavy oil from ramped temperature oxidation experimental analyses and numerical simulations," Energy, Elsevier, vol. 219(C).
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