Effect of organic type and moisture on CO2/CH4 competitive adsorption in kerogen with implications for CO2 sequestration and enhanced CH4 recovery

Huang, Liang; Ning, Zhengfu; Wang, Qing; Zhang, Wentong; Cheng, Zhi‐Lin; Wu, Xiaojun; He, Qingyou

doi:10.1016/j.apenergy.2017.10.122

Cited by 278 publications

(283 citation statements)

References 77 publications

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“…Figure 1c shows the kerogen model with porosity, which was obtained by helium probe. The densities and porosities of the proposed kerogen model varied from 1.01-1.18 g/cm 3 and 10.8-19.6%, which are consistent with previous experimental and simulation work [51]. In order to characterize the pore nature of realistic kerogen, a slit kerogen model was built by inserting an empty space into two kerogen matrices [53], as shown in Figure 1d.…”

Section: Construction Of Kerogen Modelssupporting

confidence: 81%

“…Pathak et al found that the CO 2 is more strongly retained than CH 4 in the bulk type II kerogen matrix, which is favorable for the sequestration of carbon dioxide in shale formations [50]. Huang et al studied the effects of organic type and water content on the competitive adsorption behaviors of a CH 4 and CO 2 mixture [51]. They reported that water content has a negative effect on the gas adsorption capacity and that kerogen III-A is the optimal organic type for a CS-EGR project.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Investigation of CO2/CH4 Competitive Adsorption and Confinement in Realistic Shale Kerogen

et al. 2019

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The adsorption behavior and the mechanism of a CO2/CH4 mixture in shale organic matter play significant roles to predict the carbon dioxide sequestration with enhanced gas recovery (CS-EGR) in shale reservoirs. In the present work, the adsorption performance and the mechanism of a CO2/CH4 binary mixture in realistic shale kerogen were explored by employing grand canonical Monte Carlo (GCMC) and molecular dynamics (MD) simulations. Specifically, the effects of shale organic type and maturity, temperature, pressure, and moisture content on pure CH4 and the competitive adsorption performance of a CO2/CH4 mixture were investigated. It was found that pressure and temperature have a significant influence on both the adsorption capacity and the selectivity of CO2/CH4. The simulated results also show that the adsorption capacities of CO2/CH4 increase with the maturity level of kerogen. Type II-D kerogen exhibits an obvious superiority in the adsorption capacity of CH4 and CO2 compared with other type II kerogen. In addition, the adsorption capacities of CO2 and CH4 are significantly suppressed in moist kerogen due to the strong adsorption strength of H2O molecules on the kerogen surface. Furthermore, to characterize realistic kerogen pore structure, a slit-like kerogen nanopore was constructed. It was observed that the kerogen nanopore plays an important role in determining the potential of CO2 subsurface sequestration in shale reservoirs. With the increase in nanopore size, a transition of the dominated gas adsorption mechanism from micropore filling to monolayer adsorption on the surface due to confinement effects was found. The results obtained in this study could be helpful to estimate original gas-in-place and evaluate carbon dioxide sequestration capacity in a shale matrix.

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Section: Construction Of Kerogen Modelssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Molecular Investigation of CO2/CH4 Competitive Adsorption and Confinement in Realistic Shale Kerogen

et al. 2019

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“…[48][49][50][51][52] The organic component of shale known as kerogen is commonly thought to contain much of the CH 4 , but recent GCMC studies support the conclusion that although it prefers CO 2 relative to CH 4 , the behavior of these species is strongly dependent on the chemical composition, functionality, moisture content and pore structure of the kerogen. 74,75 Overall, the structure, dynamics and energetics of the adsorption environments of CO 2 , CH 4 , other hydrocarbons, and H 2 O in kerogen have not been well explored, and the CRC-MD methods used here can be readily applied to help address these important questions.…”

Section: Discussionmentioning

confidence: 99%

Understanding methane/carbon dioxide partitioning in clay nano- and meso-pores with constant reservoir composition molecular dynamics modeling

Loganathan

Bowers

Wakou

et al. 2019

Phys. Chem. Chem. Phys.

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“…In this section, type curves of SHS flow in IT and annuli are obtained and discussed in detail (Huang et al 2017(Huang et al , 2018a(Huang et al , 2018bFeng et al 2018;Sun et al 2017k, 2017l, 2018bZhang et al 2017aZhang et al , 2017bChen et al 2015Chen et al , 2016Chen et al , 2017. The injection pressure, temperature and mass flow rate at the heel point are 4.231 MPa, 566.6 K and 3 kg/s, respectively.…”

Section: Type Curve Analysismentioning

confidence: 99%

The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

Sun

Yao

2018

J Petrol Explor Prod Technol

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Little efforts were done on the heat and mass transfer characteristics of superheated steam (SHS) flow in the horizontal wellbores. In this paper, a novel numerical model is presented to analyze the heat and mass transfer characteristics of SHS in horizontal wellbores with toe-point injection technique. Firstly, with consideration of heat exchange between inner tubing (IT) and annuli, a pipe flow model of SHS flow in IT and annuli is developed with energy and momentum balance equations. Secondly, coupled with the transient heat transfer model in oil layer, a comprehensive mathematical model for predicting distributions of pressure and temperature of SHS in IT and annuli is established. Then, type curves are obtained with numerical methods and iteration technique, and sensitivity analysis is conducted. The results show that (1). The decrease in SHS temperature in annuli caused by heat and mass transfer to oil layer is offset by heat absorbtion from SHS in IT. (2). SHS temperature in both IT and annuli increases with the increase in injection pressure. (3). IT heat loss rate decreases with the increases in injection pressure. (4). Increasing pressure can improve development effect. Keywords Superheated steam injection · Toe-point injection technique · Horizontal wellbores · Distributions of pressure and temperature · Heavy oil recovery List of symbols

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Effect of organic type and moisture on CO2/CH4 competitive adsorption in kerogen with implications for CO2 sequestration and enhanced CH4 recovery

Cited by 278 publications

References 77 publications

Molecular Investigation of CO2/CH4 Competitive Adsorption and Confinement in Realistic Shale Kerogen

Molecular Investigation of CO2/CH4 Competitive Adsorption and Confinement in Realistic Shale Kerogen

Understanding methane/carbon dioxide partitioning in clay nano- and meso-pores with constant reservoir composition molecular dynamics modeling

The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

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