Applications of Enhanced Oil Recovery Techniques of Heavy Crudes

Yuan, Chengdong; Varfolomeev, Mikhail A.; Kok, Mustafa V.; Nurgaliev, Danis K.; Gabbasov, Airat H.

doi:10.1002/9781119871507.ch3

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…Steam-based enhanced oil recovery methods currently continue to be the predominant techniques for effectively producing heavy oil and natural bitumen [10][11][12]. The structural traps with impermeable cap rocks that block the migration of the crude oil and lead to the accumulation of it can serve as natural reactors to carry out upgrading processes, where the heat is supplied by steam, hot water, etc.…”

Section: Introductionmentioning

confidence: 99%

The Catalytic Upgrading Performance of NiSO4 and FeSO4 in Case of Ashalcha Heavy Oil Reservoir

Abdelsalam,

Aliev,

Mirzayev

et al. 2023

Preprint

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Aquathermolysis is a promising method to upgrade heavy oil in reservoir conditions. However, application of catalysts can significantly promote transformation of the heavy fragments (resins and asphaltenes) and heteroatom-containing compounds of crude oil mixture into low-molecular-weight hydrocarbons. In this paper, the comparison study of the catalytic performance of the water-soluble metal salts such as NiSO4 and FeSO4 on the aquathermolytic upgrading of heavy oil samples produced from Ashal’cha reservoir was carried out at a temperature of 300 °C for 24 hours. Iron nanoparticles contributed to the highest viscosity reduction degree - 60% in contrast to the viscosity of the native crude oil sample. The viscosity alteration is reasoned by the changes in the group composition of heavy oil after catalytic (FeSO4) aquathermolysis, where the content of resins and asphaltenes were reduced by 17% and 7%, respectively. Moreover, the aquathermolytic upgrading of heavy oil in the presence of FeSO4 led to an increase in the yield of gasoline fraction by 13% and diesel fraction by 53%. The H/C ratio, which represents the hydrogenation of crude oil, increased from 1.52 (before catalytic upgrading) to 1.99 (after catalytic upgrading). The results of Chromatomass (GC-MS) and Fourier-infrared (FT-IR) spectroscopies confirmed the intensification of destructive hydrogenation of resins and asphaltenes in the presence of the water-soluble catalysts. According to XRD and SEM-EDX results, the metal salts are thermally decomposed during the aquathermolysis process into the oxides of corresponding metals and particularly sulfided by the sulfur-containing aquathermolysis products.

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Section: Introductionmentioning

confidence: 99%

The Catalytic Upgrading Performance of NiSO4 and FeSO4 in Case of Ashalcha Heavy Oil Reservoir

Abdelsalam,

Aliev,

Mirzayev

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Advancement in heavy oil upgrading and sustainable exploration emerging technologies

Yatimi,

Mendil,

Marafi

et al. 2024

Arabian Journal of Chemistry

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Microscopic Experiments to Assess the Macroscopic Sweep Characteristics of Carbon Dioxide Flooding

Wang,

Zhou,

Tang

et al. 2024

Applied Sciences

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The Lunnan oilfield in the Tarim Basin, one of China’s major onshore oilfields with substantial geological reserves, faces particular challenges due to the complexity of its reservoir environment and the dispersion of remaining oil. Carbon dioxide, a greenhouse gas, presents an opportunity for enhanced oil recovery (EOR) and geological storage. In this context, the use of carbon dioxide for EOR can simultaneously address environmental concerns and improve oil recovery rates. This study focuses on the TI reservoir in the No. 2 well area of the Lunnan oilfield, employing advanced techniques to analyze the micro- and macro-characteristics of carbon dioxide flooding. Results: From the microscopic point of view, carbon dioxide flooding is mainly miscible with crude oil, which has a strong component exchange effect and can be displaced in the form of full pores, and the microscopic displacement efficiency is close to 100%. Macroscopically, under the combined injection and production of different injected hydrocarbon pore volume multiples (HCPVs), it is injected at the upper and lower layers of the interlayer and produced far away from the lower layer of the interlayer, with a total recovery rate of 52.83%. With the increase in the HCPV, the recovery increased rapidly at first and then slowly, and the HCPV at the demarcation point was 0.5, while the oil production rate increased in a wave-like manner and then decreased rapidly, and the HCPV at the breakthrough point of TI gas was 0.5. However, when the upper and lower layers far away from the interlayer are injected at the same time, the upper and lower layers of the interlayer are produced at the same time, and the total recovery rate can reach 83.02%. With the increase in the HCPV, the recovery rate increases rapidly at first and then slowly, and the HCPV at the turning point is 6.52. The oil production rate increases in a wave-like manner, then decreases rapidly, rises rapidly, and then decreases slowly in a wave-like manner. The HCPV at the breakthrough point of TI gas is 0.63, and the HCPV at the injection–production transition point is 0.63. The total recovery rate of carbon dioxide miscible displacement can reach 88.68% under the condition of separate injection and combined production with different injected hydrocarbon pore volume multiples. With the increase in the HCPV, the recovery increased rapidly at first and then slowly. The HCPV at the demarcation point was 6.5, the oil production rate increased in a wave-like manner, then decreased rapidly, increased rapidly, and then decreased slowly in a wave-like manner. The HCPV at the breakthrough point of TI gas was 0.63, and the HCPV at the injection–production transition point was 6.5. The research results provide data support for the physical reality of the microscopic and macroscopic sweep characteristics of carbon dioxide flooding in the Lunnan oilfield, Tarim Basin.

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Applications of Enhanced Oil Recovery Techniques of Heavy Crudes

Cited by 3 publications

References 37 publications

The Catalytic Upgrading Performance of NiSO4 and FeSO4 in Case of Ashalcha Heavy Oil Reservoir

The Catalytic Upgrading Performance of NiSO4 and FeSO4 in Case of Ashalcha Heavy Oil Reservoir

Advancement in heavy oil upgrading and sustainable exploration emerging technologies

Microscopic Experiments to Assess the Macroscopic Sweep Characteristics of Carbon Dioxide Flooding

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