Influence of Carbonate Minerals on Heavy Oil Oxidation Behavior and Kinetics by TG-FTIR

Kristina A. Ariskina, Zhenfeng Ding, Mustafa Abaas, Chengdong Yuan, Dmitrii A. Emelianov, Qing Chen and Mikhail A. Varfolomeev
Additional contact information
Kristina A. Ariskina: Department of Physical Chemistry, Kazan Federal University, 420008 Kazan, Russia
Zhenfeng Ding: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Mustafa Abaas: Department of Physical Chemistry, Kazan Federal University, 420008 Kazan, Russia
Chengdong Yuan: Department of Physical Chemistry, Kazan Federal University, 420008 Kazan, Russia
Dmitrii A. Emelianov: Department of Physical Chemistry, Kazan Federal University, 420008 Kazan, Russia
Qing Chen: Research Institute of Petroleum Engineering, Tarim Oilfield Company, PetroChina, Korla 841000, China
Mikhail A. Varfolomeev: Department of Petroleum Engineering, Kazan Federal University, 420008 Kazan, Russia

Energies, 2021, vol. 14, issue 23, 1-13

Abstract: The impact of rock minerals on the performance of in situ combustion (ISC) techniques for enhanced oil recovery (EOR) is very important. This work is aimed at investigating the influence of carbonate rocks (dolomite and calcite) on heavy oil oxidation by Thermogravimetry–Fourier-Transform-Infrared (TG-FT-IR) coupled analysis. Two heavy oils with 19.70° and 14.10° API were investigated. Kinetic analysis was performed using TG data by differential and integral isoconversional methods. From TG-DTG curves, three reaction stages, i.e., low-temperature oxidation (LTO), fuel deposition (FD), and high-temperature oxidation (HTO), were defined for both two heavy oil samples, and their reaction mechanism was explained combining the FT-IR data. After the addition of calcite or dolomite, three reaction stages became two with the disappearance of FD, and a significant shift of reaction stages into lower temperatures was also observed. These significant changes in oxidation behavior are because calcite and dolomite promoted the coke formation and combustion by reducing the activation energy barrier and changing reaction pathways, which results in a smooth transition from LTO to HTO. Dolomite exhibited a slightly better promotion effect on LTO-FD than calcite, while calcite exhibited a better acceleration effect on FD-HTO than dolomite in terms of shifting reaction stages. Generally, calcite exhibited a better catalytic effect than dolomite. In spite of the different catalytic performance of calcite and dolomite, they do both show positive effects on combustion process regardless of the difference in the properties and composition of heavy oils. The findings in this work indicate that calcite and dolomite rocks are favorable for the ISC process, and when it comes to the ISC kinetics, the interaction between crude oil and rock must be considered.

Keywords: heavy oil oxidation; kinetics; dolomite rock; calcite rock; TG-FT-IR; in situ combustion (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: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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