A method to recover natural gas hydrates with geothermal energy conveyed by CO2

Liu, Yongge; Hou, Jirui; Zhao, Haifeng; Liu, Xiaoyu; Xia, Zhizeng

doi:10.1016/j.energy.2017.12.030

Cited by 85 publications

(31 citation statements)

References 43 publications

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“…By using this approach, the CH4 replacement exhibits an upper limit of 64.63%, and the maximum CO2 storage efficiency can reach up to 78.40%-96.73% [271]. Based on the concept of thermal stimulation to CH4-CO2 replacement, a geothermal-assisted CO2 replacement method (GACR) was proposed by Liu et al [272]. As described in Figure 19, the Based on the concept of thermal stimulation to CH 4 -CO 2 replacement, a geothermal-assisted CO 2 replacement method (GACR) was proposed by Liu et al [272].…”

Section: Ch4-co2 Replacement From Natural Gas Hydratesmentioning

confidence: 99%

“…Based on the concept of thermal stimulation to CH4-CO2 replacement, a geothermal-assisted CO2 replacement method (GACR) was proposed by Liu et al [272]. As described in Figure 19, the Based on the concept of thermal stimulation to CH 4 -CO 2 replacement, a geothermal-assisted CO 2 replacement method (GACR) was proposed by Liu et al [272]. As described in Figure 19, the CO 2 with ambient temperature was injected into geothermal reservoir for heating, then the heated CO 2 flows upward into the hydrate-bearing layer (HBL) to enhance the NGH dissociation.…”

Section: Ch4-co2 Replacement From Natural Gas Hydratesmentioning

confidence: 99%

“…Schematic well group configuration diagram of the geothermal-assisted CO 2 replacement method (GACR)[272].…”

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confidence: 99%

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A Review of CO2 Storage in View of Safety and Cost-Effectiveness

et al. 2020

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The emissions of greenhouse gases, especially CO2, have been identified as the main contributor for global warming and climate change. Carbon capture and storage (CCS) is considered to be the most promising strategy to mitigate the anthropogenic CO2 emissions. This review aims to provide the latest developments of CO2 storage from the perspective of improving safety and economics. The mechanisms and strategies of CO2 storage, focusing on their characteristics and current status, are discussed firstly. In the second section, the strategies for assessing and ensuring the security of CO2 storage operations, including the risks assessment approach and monitoring technology associated with CO2 storage, are outlined. In addition, the engineering methods to accelerate CO2 dissolution and mineral carbonation for fixing the mobile CO2 are also compared within the second section. The third part focuses on the strategies for improving economics of CO2 storage operations, namely enhanced industrial production with CO2 storage to generate additional profit, and co-injection of CO2 with impurities to reduce the cost. Moreover, the role of multiple CCS technologies and their distribution on the mitigation of CO2 emissions in the future are summarized. This review demonstrates that CO2 storage in depleted oil and gas reservoirs could play an important role in reducing CO2 emission in the near future and CO2 storage in saline aquifers may make the biggest contribution due to its huge storage capacity. Comparing the various available strategies, CO2-enhanced oil recovery (CO2-EOR) operations are supposed to play the most important role for CO2 mitigation in the next few years, followed by CO2-enhanced gas recovery (CO2-EGR). The direct mineralization of flue gas by coal fly ash and the pH swing mineralization would be the most promising technology for the mineral sequestration of CO2. Furthermore, by accelerating the deployment of CCS projects on large scale, the government can also play its role in reducing the CO2 emissions.

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Section: Ch4-co2 Replacement From Natural Gas Hydratesmentioning

confidence: 99%

Section: Ch4-co2 Replacement From Natural Gas Hydratesmentioning

confidence: 99%

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A Review of CO2 Storage in View of Safety and Cost-Effectiveness

et al. 2020

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“…With the depletion of conventional energy resources and the expanding energy demands, the unconventional energy resources such as the shale oil and gas have attracted more and more attention [1][2][3][4][5][6][7]. Unlike the conventional gas reservoir, numerous pores in shale are in nanometer scale [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Type on the Flow Characteristics in Shale Nanopores

Zhan

et al. 2021

Geofluids

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The underlying mechanism of shale gas migration behavior is of great importance to understanding the flow behavior and the prediction of shale gas flux. The slippage of the methane molecules on the surface is generally emphasized in nanopores in most predicted methods currently. In this work, we use molecular dynamic (MD) simulations to study the methane flow behavior in organic (graphene) and inorganic (quartz) nanopores with various pore size. It is observed that the slippage is obvious only on the graphene nanopores and disappeared on the quartz surface. Compared with the traditional Navier-Stokes equation combined with the no-slip boundary, the enhancement of the gas flux is nonnegligible in the graphene nanopores and could be neglected in the quartz nanopores. In addition, the flux contribution ratios of the adsorption layer, Knudsen layer, and the bulk gas are analyzed. In quartz nanopores, the contributions of the adsorption layer and the Knudsen layer are slight when the pore size is larger than 10 nm. It is also noted that even if the Knudsen number is the same, the flow mode may be various with the effect of the pore surface type. Our work should give molecular insights into gas migration mechanisms in organic and inorganic nanopores and provide important reference to the prediction of the gas flow in various types of shale nanopores.

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“…Theoretically, it can be utilized continuously [4]. As long as the upper limit of geothermal utilization is properly controlled, the service life of a geothermal reservoir can be extended [5,6]. Besides, geothermal energy is generally unaffected by geography, climate, and season, unlike solar, water, wind, biomass, and ocean energy [7,8].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Techno-Economic Multiobjective Optimization of Geothermal Water Reservoir Development: A Case Study of China

Zhang

Wang

Song

et al. 2019

Water

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Renewable geothermal utilization is a significant approach for residential heating with two principal modes, direct geothermal district heating systems (DGDHSs) and indirect geothermal district heating systems (IGDHSs). The key principle of geothermal development design is to prevent premature thermal breakthrough, which could result in low efficiency of geothermal heating systems. In this paper, a new approach considering building heating demand, geothermal water resource protection, and optimal economic benefits is presented systematically. The results simulated by OGS software show that well spacing, reinjection temperature, and production rate are the most significant parameters affecting thermal breakthrough in geothermal reservoirs. In addition, production rate and reinjection temperature have a huge effect on the payback period of investment. Comparing IGDHS to DGDHS, the investment in construction of geothermal wells and the annual water consumption decrease by up to 10% and 50%, respectively. Additionally, electricity costs increase by 5% to 30%. The indirect geothermal district heating system with a well spacing of 300 m, a production rate of 100 m3/h, and a reinjection temperature of 301.15 K is much better for this case, both technically and economically. The systematic calculation approach can be reasonably applied to other regions with geothermal energy utilization.

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A method to recover natural gas hydrates with geothermal energy conveyed by CO2

Cited by 85 publications

References 43 publications

A Review of CO2 Storage in View of Safety and Cost-Effectiveness

A Review of CO2 Storage in View of Safety and Cost-Effectiveness

Effect of Surface Type on the Flow Characteristics in Shale Nanopores

Numerical Investigation of Techno-Economic Multiobjective Optimization of Geothermal Water Reservoir Development: A Case Study of China

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