In Situ Combustion of Heavy Oil within a Vuggy Carbonate Reservoir: Part I—Feasibility Study

Rita Fazlyeva (), Matthew Ursenbach, Donald Mallory, Sudarshan (Raj) Mehta, Alexey Cheremisin, Gordon Moore and Mikhail Spasennykh
Additional contact information
Rita Fazlyeva: In Situ Combustion Research Group (ISCRG), University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
Matthew Ursenbach: In Situ Combustion Research Group (ISCRG), University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
Donald Mallory: In Situ Combustion Research Group (ISCRG), University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
Sudarshan (Raj) Mehta: In Situ Combustion Research Group (ISCRG), University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
Alexey Cheremisin: Center for Hydrocarbon Recovery, Skolkovo Institute of Science and Technology, Sikorsky Street 11, Moscow 121205, Russia
Gordon Moore: In Situ Combustion Research Group (ISCRG), University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
Mikhail Spasennykh: Center for Hydrocarbon Recovery, Skolkovo Institute of Science and Technology, Sikorsky Street 11, Moscow 121205, Russia

Energies, 2023, vol. 16, issue 5, 1-24

Abstract: Worldwide, the known recoverable heavy oil and bitumen reserves make up more than 64% of the total reserves, of which more than 60% are trapped in carbonates. Air injection has immense potential for hydrocarbon recovery from various reservoirs. While most of the successful air-based techniques are performed within carbonate reservoirs containing light oil, theoretically, in situ combustion (ISC) has also shown great potential for recovering heavy oil and bitumen. Carbonates are complex in terms of geology and are often associated with fractures and vugs that affect the fluid flow, pressure propagation and progression of the ISC reactions. This paper describes the first experiment in which the triple-porosity concept was applied to simulate heterogeneity through artificially induced vugs, core matrix and fractures. This approach was used to study the feasibility of the ISC recovery technique for heavy oil (14° API) within a dolomite reservoir using a combustion tube (CT) in an experiment performed at 1740 psig. The combustion front advanced through 78% of the core length prior to the termination of air injection, producing 80% of the initial oil. To differentiate between the various sources of the CO 2 gas (a product of carbonate decomposition vs. the combustion reaction) the atomic ratios of (CO 2 + CO)/CO = 6 and (CO 2 + CO)/N 2 = 0.21 were applied. Additionally, partial upgrading of the produced heavy oil was observed.

Keywords: in situ combustion (ISC); vuggy carbonate; dolomite; CO 2; CO 2 emissions; heavy oil; combustion tube (CT) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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