Evaluation of In-Situ Combustion Efficiency in Karazhanbas Oilfield, Western Kazakhstan

Abishev, Aziz; Tokarev, V. D.; Sagyndikov, Marat

doi:10.2118/192553-ms

Cited by 3 publications

(2 citation statements)

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“…Because of its low cost and less energy consumption, the ISC technology is labeled as a promising technique for heavy and extra-heavy oil recovery from reservoirs. , With all these advantages, ISC still suffers from some drawbacks such as the difficult initiation point of ignition and unstable combustion point in porous media in order to achieve oil displacement for enhanced oil recovery. , There are several methods to overcome these disadvantages including in situ combustion process in the presence of catalysts − and in situ combustion in the presence of water or steam. − ,, …”

Section: Introductionmentioning

confidence: 99%

Effect of Different Water Content and Catalyst on the Performance of Heavy Oil Oxidation in Porous Media for In Situ Upgrading

Mehrabi-Kalajahi

Hadavimoghaddam

Varfolomeev

et al. 2022

Ind. Eng. Chem. Res.

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Enhanced heavy oil recovery by in situ combustion (ISC) is still restricted as an attractive thermal method because of difficulties with ignition, inefficient combustion, and unstable combustion fronts. This study illustrates how different water contents and CoFe 2 O 4 nanoparticles coated with oleic acid (OA), individually and synergistically, can be used in heavy oil oxidation for enhanced oil recovery through ISC. By means of X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and dynamic light scattering, we characterized the synthesized bimetallic oxide catalysts with and without oleic acid as a capping agent. The size of the CoFe 2 O 4 and CoFe 2 O 4 @OA nanoparticles was evaluated by the ImageJ method in order to estimate the size distribution in different environments. The size−frequency analysis showed that the dimension of CoFe 2 O 4 nanoparticles in the presence of oleic acid as a capping agent due to uniformity and well distribution decreased to an average size of ∼20 nm. The oxidation of the heavy oil was studied by a self-designed thermo-effect cell containing a porous medium (PMTEC) and a laboratory-scale combustion tube. According to the results, the addition of 20% water content compared to 10% and 30% water content, and oil-dispersed CoFe 2 O 4 @OA compared to CoFe 2 O 4 nanoparticles led to a decrease in both low-temperature oxidation and high-temperature oxidation into lower temperatures through the reduction of energy barriers and the promotion of coke formation. The viscosity of recovered oil decreased from 2071 to 246 mPa•s after oxidation in porous media with a 20% water content and a CoFe 2 O 4 @OA catalyst. In addition, the SARA analysis showed that the oxidation of heavy oil in porous media with water content and catalyst reduced the heavy fractions such as resin and asphaltene contents from 20.9 and 5.9% to 9.7 and 2.5%, respectively, and increased the light fractions including saturate and aromatic contents from 28.7 and 44.3% to 41.3 and 46.5%, respectively. In addition, based on experimental data, a robust correlation was developed to predict oil viscosity using a genetic programming algorithm. The results showed that the developed method could predict oil viscosity with enough accuracy. On the basis of the viscosity reduction data, the combustion efficiency of heavy oil is in turn: heavy oil + CoFe 2 O 4 @OA > heavy oil + continued...

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Section: Introductionmentioning

confidence: 99%

Effect of Different Water Content and Catalyst on the Performance of Heavy Oil Oxidation in Porous Media for In Situ Upgrading

Mehrabi-Kalajahi

Hadavimoghaddam

Varfolomeev

et al. 2022

Ind. Eng. Chem. Res.

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“…In the HTO, the coke combustion process is considered as the key reaction that results in producing carbon dioxide, mainly. , Furthermore, the amount of fuel consumed in ISC is a small fraction of the reservoir oil. Therefore, this method has been labeled a low-cost heat delivering method for heavy and extra-heavy oil recovery. , Despite the noticeable advantages of the ISC technique, it still suffers from some theoretical and practical problems such as difficulty in the ignition, low combustion efficiency, and unstable combustion front that limit its application in oil production industries. , …”

Section: Introductionmentioning

confidence: 99%

Oxidation of Heavy Oil Using Oil-Dispersed Transition Metal Acetylacetonate Catalysts for Enhanced Oil Recovery

et al. 2021

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In this work, several transition metal-based acetylacetonates (Ni, Cu, and Fe) were prepared as oil-dispersed catalysts for heavy oil oxidation. X-ray diffraction (XRD), scanning electron microscopy (SEM), and Mössbauer spectroscopy were used for the characterization of catalysts. The effectivity of catalysts in the oxidation of heavy oil was investigated by a thermogravimetry method coupled with infrared spectroscopy (TG-FTIR) at four different heating rates (4, 6, 8, and 10 °C/min) and self-designed porous medium thermo-effect cell (PMTEC) techniques. The activation energy calculations using three isoconversional methods, Ozawa–Flynn–Wall (OFW), Kissinger–Akahira–Sunose (KAS), and Friedman, were performed based on thermal analysis data. The results showed that the bidentate ligand acetylacetonate (acac) provided good enough distribution of catalysts in heavy oil because in the presence of Cu(acac)2, Fe(acac)3, and Ni(acac)2, the oxidation temperature decreased in both fuel deposition (FD) and high-temperature oxidation (HTO). The activation energy of FD and HTO districts showed that Cu(acac)2 more efficiently catalyzed the oxidation of heavy oil than Fe(acac)3 and Ni(acac)2. The usage of Cu(acac)2 helped decrease the average activation energy of the in situ combustion process from 177 to 117 kJ/mol, from 187 to 127 kJ/mol, and from 198 to 128 kJ/mol based on OFW, KAS, and Friedman methods, respectively. The in situ transformation of the catalysts in the presence of heavy oil was studied under different isothermal conditions. Based on XRD and SEM data at 400 °C, Cu(acac)2 and Ni(acac)2 were transformed to CuO and NiO nanoparticles as the active form of catalysts. For Fe(acac)3, it was found that at 400 °C, it transformed to magnetite (Fe3O4) species; however, at 500 °C, hematite (α-Fe2O3) and maghemite (γ-Fe2O3) were the most predominant species. The heavy oil oxidation using these low-cost and easy to prepare catalysts could be the best route for improving the efficiency of in situ combustion in field applications.

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Improving the in-situ upgrading of extra heavy oil using metal-based oil-soluble catalysts through oxidation process for enhanced oil recovery

Nejad Zare,

Mehrabi-Kalajahi,

Varfolomeev

et al. 2024

J Petrol Explor Prod Technol

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The demand for fuel from unconventional sources is increasing all over the world, however, there are still special and strict regulations regarding the methods of enhanced oil recovery as well as the content of the oil produced, including the amount of sulfur. In-situ combustion (ISC) is an attractive thermal method to enhance oil recovery and in-situ upgrading process. In this work, copper (II) oleate and copper (II) stearate were used for the oxidation of extra heavy oil with high sulfur content in the ISC process using a self-designed porous medium thermo-effect cell (PMTEC) and visual combustion tube. Using PMTEC the catalytic performances of the synthesized oil-soluble copper (II) oleate and copper (II) stearate and kinetic parameters such as activation energy using Ozawa-Flynn-Wall method were studied. The X-ray diffraction (XRD) and high-resolution field emission scanning electron microscopy were used to examine the characteristics of in-situ synthesized CuO nanoparticles during oxidation. As shown, the presence of oil-soluble copper (II) stearate and copper (II) oleate reduced oil viscosity from 9964 to 8000 and 6090 mPa˙s, respectively. Following ISC process in porous media in the presence of copper (II) oleate, the high sulfur extra heavy oil upgraded, and its sulfur content decreased from 10.33 to 6.79%. Additionally, SARA analysis revealed that asphaltene and resin content decreased in the presence of oil-soluble catalysts. During the oxidation reaction, homogeneous catalyst decomposed into nanoparticles, and heterogeneous catalyst is distributed uniformly in porous media and played an active role in the catalytic process. It should be noticed that, these kind of oil-soluble catalysts can be novel and highly potential candidates for initiation and oxidation of extra heavy oil in order to decrease the viscosity, enhanced oil recovery and production of the upgraded oil. Graphical abstract

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Evaluation of In-Situ Combustion Efficiency in Karazhanbas Oilfield, Western Kazakhstan

Cited by 3 publications

References 0 publications

Effect of Different Water Content and Catalyst on the Performance of Heavy Oil Oxidation in Porous Media for In Situ Upgrading

Effect of Different Water Content and Catalyst on the Performance of Heavy Oil Oxidation in Porous Media for In Situ Upgrading

Oxidation of Heavy Oil Using Oil-Dispersed Transition Metal Acetylacetonate Catalysts for Enhanced Oil Recovery

Improving the in-situ upgrading of extra heavy oil using metal-based oil-soluble catalysts through oxidation process for enhanced oil recovery

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