Visualization study of CO2-EOR in carbonate reservoirs using 2.5D heterogeneous micromodels for CCUS

Lv, Qichao; Zheng, Rong; Zhou, Tongke; Guo, Xinshu; Wang, Wei; Li, Junjian; Liu, Zilong

doi:10.1016/j.fuel.2022.125533

Cited by 27 publications

(12 citation statements)

References 40 publications

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“…Henry’s constant is the amount of gas dissolved in a unit volume of liquid. , As the Henry constant increases, the cumulative oil production, crude oil recovery rate, and CO 2 oil change rate all slowly increase. However, the CO 2 burial capacity and burial rate decrease.…”

Section: Sensitivity Analysismentioning

confidence: 99%

Experimental and Numerical Simulation Analysis of Factors Affecting CO₂ Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability

Liu,

Shen,

Yue

et al. 2023

Energy Fuels

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Carbon neutrality has become the long-term development strategy of many countries worldwide, and the widespread implementation of CCUS (carbon capture, utilization, and storage) is critical for achieving this goal. Ultralow permeability reservoirs have good storage and shielding properties, making them ideal for CO2 geological storage. CO2 into these reservoirs has the dual purpose of improving crude oil recovery and protecting the environment. However, the physical properties of ultralow permeability reservoirs are poor. Furthermore, the distribution of fractures is often complex. The mechanism and influencing factors of the CO2 storage are still unclear. Here, the CO2 storage in ultralow permeability reservoirs is analyzed through core displacement experiments and numerical simulation. The main influencing factors of cumulative oil production and CO2 storage capacity were calculated through gray correlation theory, including CO2 injection rate, permeability, porosity, the solubility of CO2 in water, and the bottom hole flow pressure of production wells. The research results show that the geological storage of CO2 in ultralow permeability reservoirs mainly consists of structural trapping and dissolution into the residual fluids; in the short term, mineralization is relatively small and can be ignored. Within the 15 years predicted by numerical simulation, the injected CO2 into the Y28–102 well group in the Huang3 district was structurally trapped, with a total capacity of 6.59 × 104t. The burial ratio was 63.4%, of which structural burial accounted for 82%, oil dissolution accounted for 9%, water dissolution accounted for 8%, and mineral burial accounted for approximately 1%. The research results reference CO2 flooding and geological storage in ultralow permeability reservoirs.

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Section: Sensitivity Analysismentioning

confidence: 99%

Experimental and Numerical Simulation Analysis of Factors Affecting CO₂ Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability

Liu,

Shen,

Yue

et al. 2023

Energy Fuels

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“…To significantly reduce CO 2 emissions, the Chinese government has put forward a set of policies to tackle the current high emission levels. These include promoting coal consumption substitution and upgrading, actively developing the new energy industry, and implementing CCUS (Carbon Capture, Utilization, and Storage) to reach carbon peaking by 2030 and zero carbon emissions by 2060. − One effective solution to decrease CO 2 emissions involves storing CO 2 in depleted oil and gas reservoirs. − Compared to fossil fuels, shale gas is a renewable and practical energy resource that helps minimize the world’s reliance on high-energy consumption and polluting output resources while providing additional alternatives for decreasing air pollutants and greenhouse emissions . Shale is helpful in CO 2 -EGR because it preferentially absorbs carbon dioxide over methane. , …”

Section: Introductionmentioning

confidence: 99%

Review on Carbon Capture, Utilization, and Storage for Enhancing Gas Recovery

AL-khulaidi,

Sun,

Alareqi

et al. 2024

Energy Fuels

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The escalating levels of carbon dioxide emissions (CO 2 ) and the detrimental consequences of global warming have spurred extensive research into identifying secure and reliable storage sites with ample capacity. Depleted gas reservoirs emerge as a promising option for CO 2 sequestration, solidifying their position as a viable carbon sink. These conventional or unconventional reservoirs retain substantial pore space after natural gas extraction and depressurization. Furthermore, their impermeable top layers ensure the long-term containment of hydrocarbons, enhancing the safety of this choice. Consequently, the cost of the process can be reduced through the incremental recapture of excess gas after carbon dioxide (CO 2 ) injection. This article is a comprehensive review of multiple published papers exploring the enhancement of shale gas recovery through CO 2 injection. It aims to present a thorough understanding of the concept of this technology, highlighting its benefits and drawbacks, comparing existing studies, and encouraging further research into the CO 2 -EGR principle.

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“…CO2 injection has attracted much attention due to its low injection pressure, mass transfer, viscosity reduction and miscibility [6][7][8][9] . Meanwhile, CO2 injection can achieve a reduction in carbon emissions [10,11] . However, the existence of fractures makes the possibility of gas channeling greatly increased during gas injection [12] .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of CO2 flooding in tight oil reservoirs: Effects of the fracture aperture on production characteristics and oil distribution

Yang,

Huang,

Zhao

et al. 2024

Preprint

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Field observations, along with experimental laboratory, exhibit evidence that gas injection in tight oil reservoirs is technically feasible. However, there is a lack of understanding the effects of fracture aperture on the oil production behaviors, especially when the fracture aperture is less than 50μm. In this study, CO2 flooding experiments were carried out using different fracture aperture core samples considering the confining pressure (11μm, 15μm, 20μm, 25μm). And the production characteristics and remaining oil distribution were evaluated based on nuclear magnetic resonance (NMR). The results showed that fracture aperture is of significance to the permeability. Specifically, with the increase of fracture aperture, permeability increases in power law while porosity increases linearly. It is worth noting that the recovery of CO2 flooding is the highest (17.60%) after water flooding when the fracture aperture is 20μm. Moreover, the dissolution diffusion mechanism becomes more obvious when the fracture aperture increases (10~20μm), but gas channeling will lead to a large amount of remaining oil when the fracture aperture exceeds a certain limit (20~25μm) according to the results of nuclear Magnetic Resonance Imaging (MRI). The results provide a theoretical basis for further understanding the effect of fracture aperture on CO2 injection in tight reservoirs.

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Visualization study of CO2-EOR in carbonate reservoirs using 2.5D heterogeneous micromodels for CCUS

Cited by 27 publications

References 40 publications

Experimental and Numerical Simulation Analysis of Factors Affecting CO₂ Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability

Experimental and Numerical Simulation Analysis of Factors Affecting CO₂ Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability

Review on Carbon Capture, Utilization, and Storage for Enhancing Gas Recovery

Experimental investigation of CO2 flooding in tight oil reservoirs: Effects of the fracture aperture on production characteristics and oil distribution

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Visualization study of CO2-EOR in carbonate reservoirs using 2.5D heterogeneous micromodels for CCUS

Cited by 27 publications

References 40 publications

Experimental and Numerical Simulation Analysis of Factors Affecting CO2 Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability

Experimental and Numerical Simulation Analysis of Factors Affecting CO2 Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability

Review on Carbon Capture, Utilization, and Storage for Enhancing Gas Recovery

Experimental investigation of CO2 flooding in tight oil reservoirs: Effects of the fracture aperture on production characteristics and oil distribution

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Product

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Experimental and Numerical Simulation Analysis of Factors Affecting CO₂ Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability

Experimental and Numerical Simulation Analysis of Factors Affecting CO₂ Geological Storage and Enhanced Oil Recovery in Extra-Low Permeability