Methane recovery from natural gas hydrate in porous sediment using pressurized liquid CO2

Yuan, Qing; Sun, Chang‐Yu; Liu, Bei; Wang, Xue; Ma, Zhengwei; Ma, Qing-Lan; Yang, Liu; Chen, Guangjin; Li, Qingping; Li, Shi; Zhang, Ke

doi:10.1016/j.enconman.2012.11.018

Cited by 166 publications

(73 citation statements)

References 34 publications

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“…As the driving force for the exchange reaction comes from fugacity difference, the effect of guest species fugacity was identified as one of the factor affecting recovery efficiency [183]. For example, the use of liquid CO 2 has been proven to achieve a higher production as compared to gaseous CO 2 injection [178]. 4.…”

Section: Factors Influencing the Exchange Processmentioning

confidence: 99%

“…Good agreement between the experimental results and a fugacity based mechanism was shown in the study. In a separate work using the same reactor [178], similar hydrate samples were formed, but temperature and pressure conditions were altered to investigate the effect of applying liquid phase CO 2 . At conditions where pure CH 4 hydrate was unstable whereas CO 2 hydrate was stable, a maximum methane recovery of 35% was achieved.…”

Section: Exchange Process In Dispersed Hydratesmentioning

confidence: 99%

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Review of natural gas hydrates as an energy resource: Prospects and challenges

et al. 2016

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Section: Factors Influencing the Exchange Processmentioning

confidence: 99%

Section: Exchange Process In Dispersed Hydratesmentioning

confidence: 99%

Review of natural gas hydrates as an energy resource: Prospects and challenges

et al. 2016

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“…The exchange technology has previously been demonstrated in bulk experiments [14][15][16][17], in sediments [18][19][20][21][22][23][24] and numerically [19,25,26]. This work is part of the laboratory work that was conducted in advance of the Ignik Sikumi field test [27], where the University of Bergen in partnership with ConocoPhillips have studied CO2-CH4 exchange for a range of initial saturations.…”

Section: Figurementioning

confidence: 99%

Transport Mechanisms for CO2-CH4 Exchange and Safe CO2 Storage in Hydrate-Bearing Sandstone

et al. 2015

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CO2 injection in hydrate-bearing sediments induces methane (CH4) production while benefitting from CO2 storage, as demonstrated in both core and field scale studies. CH4 hydrates have been formed repeatedly in partially water saturated Bentheim sandstones. Magnetic Resonance Imaging (MRI) and CH4 consumption from pump logs have been used to verify final CH4 hydrate saturation. Gas Chromatography (GC) in combination with a Mass Flow Meter was used to quantify CH4 recovery during CO2 injection. The overall aim has been to study the impact of CO2 in fractured and non-fractured samples to determine the performance of CO2-induced CH4 hydrate production. Previous efforts focused on diffusion-driven exchange from a fracture volume. This approach was limited by gas dilution, where free and produced CH4 reduced the CO2 concentration and subsequent driving force for both diffusion and exchange. This limitation was targeted by performing experiments where CO2 was injected continuously into the spacer volume to maintain a high driving force. To evaluate the effect of diffusion length multi-fractured core samples were used, which demonstrated that length was not the dominating effect on core scale. An additional set of experiments is presented on non-fractured samples, where diffusion-limited transportation was assisted by continuous CO2 injection and CH4 displacement. Loss of permeability was addressed through binary gas (N2/CO2) injection, which regained injectivity and sustained CO2-CH4 exchange. OPEN ACCESSEnergies 2015, 8 4074

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“…Among the various kinds of methods developed, hydraulic fracture technology is commonly applied in these reservoirs. Nevertheless, in order to reduce greenhouse gases around the world, CO 2 capture and sequestration technologies [4][5][6], tight gas and coalbed methane reservoir recovery by CO 2 injection and the method of exploring gas hydrates by CO 2 displacement have emerged [7][8][9][10][11]. Gas injection is considered an effective way to enhance oil and gas recovery and it has been widely used worldwide [12,13].…”

Section: Introductionmentioning

confidence: 99%

Study on the Adsorption, Diffusion and Permeation Selectivity of Shale Gas in Organics

Wang

Liu

et al. 2017

Energies

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Abstract:As kerogen is the main organic component in shale, the adsorption capacity, diffusion and permeability of the gas in kerogen plays an important role in shale gas production. Based on the molecular model of type II kerogen, an organic nanoporous structure was established. The Grand Canonical Monte Carlo (GCMC) and Molecular Dynamics (MD) methods were used to study the adsorption and diffusion capacity of mixed gas systems with different mole ratios of CO 2 and CH 4 in the foregoing nanoporous structure, and gas adsorption, isosteric heats of adsorption and self-diffusion coefficient were obtained. The selective permeation of gas components in the organic pores was further studied. The results show that CO 2 and CH 4 present physical adsorption in the organic nanopores. The adsorption capacity of CO 2 is larger than that of CH 4 in organic pores, but the self-diffusion coefficient of CH 4 in mixed gas is larger than that of CO 2 . Moreover, the self-diffusion coefficient in the horizontal direction is larger than that in the vertical direction. The mixed gas pressure and mole ratio have limited effects on the isosteric heat and the self-diffusion of CH 4 and CO 2 adsorption. Regarding the analysis of mixed gas selective permeation, it is concluded that the adsorption selectivity of CO 2 is larger than that of CH 4 in the organic nanopores. The larger the CO 2 /CH 4 mole ratio, the greater the adsorption and permeation selectivity of mixed gas in shale. The permeation process is mainly controlled by adsorption rather than diffusion. These results are expected to reveal the adsorption and diffusion mechanism of gas in shale organics, which has a great significance for further research.

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Methane recovery from natural gas hydrate in porous sediment using pressurized liquid CO2

Cited by 166 publications

References 34 publications

Review of natural gas hydrates as an energy resource: Prospects and challenges

Review of natural gas hydrates as an energy resource: Prospects and challenges

Transport Mechanisms for CO2-CH4 Exchange and Safe CO2 Storage in Hydrate-Bearing Sandstone

Study on the Adsorption, Diffusion and Permeation Selectivity of Shale Gas in Organics

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