Production strategy for oceanic methane hydrate extraction and power generation with Carbon Capture and Storage (CCS)

Chen, Lin; Sasaki, H.; Watanabe, Tsutomu; Okajima, Junnosuke; Komiya, Atsuki; Maruyama, Shigenao

doi:10.1016/j.energy.2017.03.029

Cited by 40 publications

(13 citation statements)

References 27 publications

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“…Application Strategy of Thermal Stimulation Methods. Actually, alongside the above thermal stimulation method, some other thermal methods by the utilization of heat sources such as high-salt hot water prepared by seawater near the ocean surface, 217 residual heat from power generation, and combustion on the offshore production platform, 218 decay heat of nuclear waste, heat generation by solar power, 174 and ultrasonic waves 219 have also been put forward and adopted to increase performance for gas recovery, but these methods, only as one conceptual model, need to be investigated further for their application details and performance. What is essential at these methods is the regulation and control grade for the heating power or injection amount of heat.…”

Section: Depressurization Methods (Dp)mentioning

confidence: 99%

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

et al. 2022

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Safe, efficient, and economical gas recovery from hydrate-bearing sediments (HBS) is a severe issue that determines if natural gas hydrate (NGH), as an alternative energy in the future as fossil fuels approach depletion, is applied. Researchers worldwide are committed to developing a safe, efficient, and economical method of gas recovery from HBS. However, until now, most methods are still being validated and not have not been identified to exploit NGH commercially. Therefore, it is appropriate and significant to discuss researchers’ achievements to exploit NGH and summarize their potential benefits and challenges. This paper introduces nearly all the conventional and latest NGH exploitation methods and reviews field trials’ development characteristics. On the basis of laboratory experiments and field trials, key challenges restricting safe and efficient NGH development, and the existing research gaps reflecting these challenges, are also presented from the gas production, security, and economic aspects. The unfavorable situation mainly comprises the insufficient sensible heat, extremely low thermal conductivity, and ultralow permeability of HBS, lower gas production rate and its intense fluctuations, higher water-to-gas ratio (WGR), geological deformation, and subsidence of HBS attributed to excessive sand production, driving the consideration of some possible solutions. Given this, a new method for enhanced gas production from HBS based on the combination of depressurization (DP) and an in-situ heat generation method is proposed. Benefiting from multiple theoretical enhancement mechanisms such as replenishing energy to HBS with in-situ heat generation powders, cementing and strengthening the HBS skeleton, improving the gas permeability in HBS, decreasing the WGR based on blocking water, and removing gas characteristics of hydration products, this method could be expected to achieve promising long-term performance of gas production, which will be theoretically and practically significant to study commercial gas production.

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Section: Depressurization Methods (Dp)mentioning

confidence: 99%

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

et al. 2022

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“…For these two production methods, four cases with different water injection rates are studied, and the temperature of the injected fluid is 60 °C. The injected fluid may originate from a power generation system 40 or a geothermal reservoir beneath the hydrate system. 41 Note that the effect of salinity of the injected fluid is neglected.…”

Section: Production Strategymentioning

confidence: 99%

Numerical Study of the Effect of Thermal Stimulation on Gas Production from Marine Hydrate Reservoirs

Shang

Zhan

et al. 2022

Energy Fuels

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The temperature of hydrate reservoirs will decrease in a gas production process because gas hydrate dissociation is endothermic, leading to a decrease in the gas production rate as sensible heat is exhausted. Heat supply should be an effective way to alleviate the effect of temperature decrease on the production rate, by thermal stimulation, such as hot water injection into a hydrate reservoir. However, the feasibility of thermal stimulation combined with depressurization is controversial. Hence, to investigate the effect of this combined strategy, gas production performance is studied by numerical simulation based on a 2D Cartesian hydrate reservoir model with a two parallel horizontal well configuration. One of the two horizontal wells, at the top of the hydrate-bearing layers, is for gas production, and the other at the bottom of the hydrate-bearing layers is for hot water injection. The influence of the injection rate, temperature of hot water, and permeability of hydrate-bearing layers on gas production is investigated. When only the hot water injection is applied, the released gas, which originates from the dissociation of hydrates around the injection well, tends to be trapped and forms hydrates again. When the production strategy of hot water injection combined with depressurization is engaged, the hydrate dissociation shows a depressurization-dominant feature, and the production is at a relatively high rate, but it seems the hot water injection is still a negative factor in gas production. Because the hot water injection will replenish reservoir pressure and increase the water production rate, the feasibility of depressurization will be compromised. Sensitivity analyses reveal that the increased permeability of hydratebearing layers can enhance gas production almost proportionally. It is also found that increasing the temperature of the injected hot water only has a very limited effect on gas production.

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“…[12] . 近年来针对实现长期稳定采气的利用系统的研究 [5,6,13] 还较为缺乏. 这类可燃冰综合利用系统一般需要考虑海底可燃冰分解的能量平衡, 天然气高效存储、利用和输送 , 以及二氧化碳处理等环节 .…”

Section: 地层中在实际降压过程中未固结储层会随着采气的进行而发生形变从而导致井底压力升高甚至是unclassified

Oceanic methane hydrate utilization system design and reservoir scale numerical modeling

et al. 2018

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Production strategy for oceanic methane hydrate extraction and power generation with Carbon Capture and Storage (CCS)

Cited by 40 publications

References 27 publications

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

Numerical Study of the Effect of Thermal Stimulation on Gas Production from Marine Hydrate Reservoirs

Oceanic methane hydrate utilization system design and reservoir scale numerical modeling

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