Research for reducing the Minimum Miscible Pressure of crude oil and carbon dioxide by injecting citric acid isobutyl ester

Fan, G. J.; Zhao, Yuejun; Li, Yilin; Zhang, Xiaodan; Chen, Hao

doi:10.2516/ogst/2021007

Cited by 9 publications

(3 citation statements)

References 51 publications

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“…Theoretically at MMP the maximum possible oil recovery ( ~70% in field scenario) can be achieved leading to huge economic benefit [48]. MMP is considered to be a key factor in evaluating whether a reservoir fulfills miscible flooding [49]. If the MMP is lower than the reservoir pressure, it is assumed to be a reservoir that is miscible with CO 2 ; otherwise, it is a reservoir that is immiscible with CO 2 .…”

Section: Minimum Miscible Pressure Screeningmentioning

confidence: 99%

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Wang¹,

Wu²,

Ge³

et al. 2023

Sci. Tech. Energ. Transition

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Carbon Capture, Utilization, and Storage (CCUS) technology has emerged as the bottom-line technology for achieving carbon neutrality goals in China. The development of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR) not only increases revenue for high-investment CCUS projects but also enables permanent CO2 storage in the oil reservoir. However, the basin is used as the research object to evaluate the CO2 storage potential of the oil reservoir. The evaluation results are inaccurate and unable to support the implementation of later CCUS projects. Here, more accurate oil reservoir data is employed as the evaluation object. It is the first time at the national level to screen oil reservoirs to distinguish between CO2 miscible and immiscible, and evaluate the potential of CO2-EOR and CO2 storage in the reservoir. The research results show a total of 2570 suitable oil reservoirs in 4386 candidate oil reservoirs nationwide. About 1.26 billion tons of additional crude oil can be produced by CO2-EOR technology. This includes approximately 580 million tons of additional oil from CO2 miscible flooding and 680 million tons from CO2 immiscible flooding. The study further refines the CO2 geological utilization data and provides a theoretical basis for CCUS project site selection in China.

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Section: Minimum Miscible Pressure Screeningmentioning

confidence: 99%

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Wang¹,

Wu²,

Ge³

et al. 2023

Sci. Tech. Energ. Transition

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“…Surfactants are organic compounds with amphiphilic groups, containing two groups with different polarities and hydrophilic properties. Their addition in small amounts can significantly reduce the interfacial tension in the solution, alter the interface state of the solution system, and result in a series of effects such as wetting, emulsification, and solubilization [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Effect of Tributyl Citrate as a Cosolvent on the Phase Behavior of Crude Oil during CO2 Injection Process

Xue,

Yang,

et al. 2024

Energies

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The current research on CO2 cosolvent primarily focuses on reducing the minimum miscibility pressure and improving oil recovery. However, investigations into the impact of additive agents on the phase behavior of crude oil during the CO2 injection process are relatively limited. In this study, we introduced tributyl citrate as a cosolvent to the CO2 injection process. By comparing the phase parameters of crude oil and changes in component composition in the residual oil before and after the addition of tributyl citrate, we explored the influence patterns of this cosolvent during CO2 injection. The experiments show that the optimum concentration of tributyl citrate is 0.3%. After the addition of tributyl citrate, the bubble point pressure of crude oil is reduced from 14.28 MPa to 13.36 MPa, and the density is decreased from 1.00 g/cm3 to 0.95 g/cm3. These alterations of bubble point pressure and density indicate an enhanced solubility of CO2 and improved miscibility with the oil, coinciding with an increased volume expansion coefficient rising from 1.12 to 1.18 under 20 MPa and a decrease in viscosity from 0.73 mPa·s to 0.64 mPa·s. Tributyl citrate primarily affects the properties of crude oil by reducing interfacial tension and the content of heavy components in the dissolution system. The addition of tributyl citrate stabilizes the deposition trend of heavy components in crude oil and promotes the transformation of heavy components into light components, thereby enhancing the efficiency of CO2 extraction. This study provides valuable insights into a novel and simple method to further increase oil recovery in the CO2 injection process.

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“…At present, scholars have carried out in-depth research on the oil increase mechanism of CO 2 huf and puf and feld implementation parameters (such as injection volume, soaking time, and production parameters) [17,18]. Trough nuclear magnetic resonance (NMR), the distribution of residual oil after supercritical CO 2 huf and puf of low permeability core is studied [19].…”

Section: Introductionmentioning

confidence: 99%

Effect of CO2 Huff and Puff Rounds on Crude Oil Properties

Shi¹,

Gong²,

Qin

2023

Journal of Chemistry

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In view of the deterioration of oil well liquid supply capacity and oil increase effect after multiple rounds of carbon dioxide (CO2) huff and puff, according to the actual conditions of the Ng12 reservoir in the XA oilfield, an indoor physical simulation experimental model was established. The experimental parameters were determined, five rounds of CO2 huff and puff experiments were carried out, and the crude oil produced in the water flooding stage and different rounds of CO2 huff and puff were collected. The effects of CO2 huff and puff rounds on crude oil viscosity, density, composition, paraffin content, and gum asphaltene content were studied. The results show that with the increase in CO2 huff and puff rounds, the viscosity and density of produced crude oil decrease. The content of light component (C2∼C6) and intermediate component (C7∼C10) increased, while the content of heavy component (C11+) decreased. CO2 has the strongest extraction effect on light components and the weakest extraction effect on heavy components. At the same time, the content of paraffin and gum asphaltene in the produced crude oil is reduced. For oil wells with multiple rounds of CO2 huff and puff, colloidal asphaltene precipitation inhibitor and scavenger should be considered to reduce the impact of colloidal asphaltene on formation permeability and liquid supply capacity.

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Research for reducing the Minimum Miscible Pressure of crude oil and carbon dioxide by injecting citric acid isobutyl ester

Cited by 9 publications

References 51 publications

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Effect of Tributyl Citrate as a Cosolvent on the Phase Behavior of Crude Oil during CO2 Injection Process

Effect of CO2 Huff and Puff Rounds on Crude Oil Properties

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Research for reducing the Minimum Miscible Pressure of crude oil and carbon dioxide by injecting citric acid isobutyl ester

Cited by 9 publications

References 51 publications

Evaluation of CO2enhanced oil recovery and CO2storage potential in oil reservoirs of petroliferous sedimentary basin, China

Evaluation of CO2enhanced oil recovery and CO2storage potential in oil reservoirs of petroliferous sedimentary basin, China

Effect of Tributyl Citrate as a Cosolvent on the Phase Behavior of Crude Oil during CO2 Injection Process

Effect of CO2 Huff and Puff Rounds on Crude Oil Properties

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Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China