Adsorption of pure CO2 and a CO2/CH4 mixture on a black shale sample: Manometry and microcalorimetry measurements

Cancino, Olga Patricia Ortiz; Pérez, David Pino; Pozo, Manuel; Bessières, David

doi:10.1016/j.petrol.2017.09.038

Cited by 60 publications

(29 citation statements)

References 31 publications

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“…While N2 molecules are diffused in the bulk region except for the molecules which are detained on the surface of the kerogen model. It strengthens that adsorption of CO2 on the kerogen has a higher magnitude than adsorption of other particles through the adsorption isotherm experiments [39,40]. In the current stage of our simulation of CO2 and N2 adsorption/diffusion, the combination of the simulation result and the density profile reveals that kerogen models prefer to adsorb CO2 molecules.…”

Section: Gas Diffusion/adsorption On the Surface Of Kerogensupporting

confidence: 70%

Developing an Amorphous Kerogen Molecular Model Based on Gas Adsorption Isotherms

Lee¹,

liu²,

Shakib³

et al. 2019

Preprint

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Section: Gas Diffusion/adsorption On the Surface Of Kerogensupporting

confidence: 70%

Developing an Amorphous Kerogen Molecular Model Based on Gas Adsorption Isotherms

Lee¹,

liu²,

Shakib³

et al. 2019

Preprint

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“…This phenomenon can take place in almost all kinds of shales. Klewiah et al [32] summarized a lot of experimental data [22,29,[35][36][37][38][39][40][41][42][43][44][45] in different shales and confirmed the strong correlation of gas capacity with TOC, shown in Figure 2. The adsorption capacities of CH 4 have strong positive linearity with TOC for both dry and moist shales.…”

Section: Influence Of Various Factors On Chmentioning

confidence: 76%

“…The adsorption experiments of CO 2 -CH 4 mixture system [42,[88][89][90][91][92] show that the greater adsorption affinity exists for CO 2 in shales than CH 4 even though sometimes CH 4 is preferentially adsorbed in the adsorption experiment of CO 2 -CH 4 mixture. It is revealed that CO 2 has a higher adsorption capacity in the coexistence of CO 2 and CH 4 , proving that competitive adsorption is beneficial to the implementation of CO 2 -ESGR.…”

Section: Competitive Adsorption Between Ch 4 and Comentioning

confidence: 97%

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Study on Competitive Adsorption and Displacing Properties of CO2 Enhanced Shale Gas Recovery: Advances and Challenges

Liu

Sun

et al. 2020

Geofluids

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CO2 enhanced shale gas recovery (CO2-ESGR) draws worldwide attentions in recent years with having significant environmental benefit of CO2 geological storage and economic benefit of shale gas production. This paper is aimed at reviewing the state of experiment and model studies on gas adsorption, competitive adsorption of CO2/CH4, and displacement of CO2-CH4 in shale in the process of CO2-ESGR and pointing out the related challenges and opportunities. Gas adsorption mechanism in shale, influencing factors (organic matter content, kerogen type, thermal maturity, inorganic compositions, moisture, and micro/nano-scale pore), and adsorption models are described in this work. The competitive adsorption mechanisms are qualitatively ascertained by analysis of unique molecular and supercritical properties of CO2 and the interaction of CO2 with shale matrix. Shale matrix shows a stronger affinity with CO2, and thus, adsorption capacity of CO2 is larger than that of CH4 even with the coexistence of CO2-CH4 mixture. Displacement experiments of CO2-CH4 in shale proved that shale gas recovery is enhanced by the competitive adsorption of CO2 to CH4. Although the competitive adsorption mechanism is preliminary revealed, some challenges still exist. Competitive adsorption behavior is not fully understood in the coexistence of CO2 and CH4 components, and more experiment and model studies on adsorption of CO2-CH4 mixtures need to be conducted under field conditions. Coupling of competitive adsorption with displacing flow is key factor for CO2-ESGR but not comprehensively studied. More displacement experiments of CO2-CH4 in shale are required for revealing the mechanism of flow and transport of gas in CO2-ESGR.

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“…Over the last two decades, there has been growing attention toward separation and sequestration of greenhouse gases using organic-rich shales, which can also address a viable injection/production scheme for CO 2 enhanced oil recovery (EOR) operation. , The injection of CO 2 into unconventional organic-rich shales is not only an effective method to boost hydrocarbon productivity and more efficient recovery but also can serve as a large-scale CO 2 capture technique. − The organic matter, which is abundant in shale formations, also known as kerogen, has a complex molecular structure and mainly consists of carbon, hydrogen, oxygen, nitrogen, and sulfur . Studies have found that kerogen in shale formations can chemically interact with CO 2 and hydrocarbons to enhance the selectivity of CO 2 over hydrocarbons in the presence of other fluids . However, it is a challenge to produce hydrocarbons and store CO 2 simultaneously due to the interference of hydrocarbons and brine in CO 2 sorption .…”

Section: Introductionmentioning

confidence: 99%

Optimal Separation of CO₂/CH₄/Brine with Amorphous Kerogen: A Thermodynamics and Kinetics Study

et al. 2019

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Carbon dioxide (CO 2 )-enhanced oil recovery and sequestration are both processes that are associated with the separation and storage of gas in organic-rich shale formations. The current study investigates the applicability of kerogen, an amorphous and insoluble organic matter abundant in unconventional shale formations, for the separation of the mixture of gases (CO 2 and CH 4 ) in dry and wet (brine) conditions for an effective storage and injection operation. Here, through molecular dynamics, thermodynamics, and kinetics, we investigate the CO 2 transportation and adsorption behavior on three-dimensional kerogen molecular models from the Bakken, which contains nonperiodically arrayed functional groups. The diffusion/separation of CO 2 and CH 4 is probed subject to a varying range of concentrations as well as pressure from atmospheric to high (30 bar) and realistic temperatures (333−393 K) to represent an unconventional reservoir system. It is found that kerogen models from the Bakken would demonstrate an unprecedented CO 2 sorption selectivity over methane in the presence of brine (formation or interstitial water, a mixture of water and salt). Moreover, the concentration of brine shows a positive effect for CO 2 /CH 4 selectivity that supports our goals of sequestration and enhanced production. Based on the quantitative results, the developed kerogen model is suggested as an appropriate framework for CO 2 sequestration and injection to further facilitate hydrocarbon-improved recovery in organic-rich shale reservoirs and promote sequestration in a major shale formation.

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Adsorption of pure CO2 and a CO2/CH4 mixture on a black shale sample: Manometry and microcalorimetry measurements

Cited by 60 publications

References 31 publications

Developing an Amorphous Kerogen Molecular Model Based on Gas Adsorption Isotherms

Developing an Amorphous Kerogen Molecular Model Based on Gas Adsorption Isotherms

Study on Competitive Adsorption and Displacing Properties of CO2 Enhanced Shale Gas Recovery: Advances and Challenges

Optimal Separation of CO₂/CH₄/Brine with Amorphous Kerogen: A Thermodynamics and Kinetics Study

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Adsorption of pure CO2 and a CO2/CH4 mixture on a black shale sample: Manometry and microcalorimetry measurements

Cited by 60 publications

References 31 publications

Developing an Amorphous Kerogen Molecular Model Based on Gas Adsorption Isotherms

Developing an Amorphous Kerogen Molecular Model Based on Gas Adsorption Isotherms

Study on Competitive Adsorption and Displacing Properties of CO2 Enhanced Shale Gas Recovery: Advances and Challenges

Optimal Separation of CO2/CH4/Brine with Amorphous Kerogen: A Thermodynamics and Kinetics Study

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Optimal Separation of CO₂/CH₄/Brine with Amorphous Kerogen: A Thermodynamics and Kinetics Study