Long-term numerical simulation of a joint production of gas hydrate and underlying shallow gas through dual horizontal wells in the South China Sea

Wei, Rupeng; Xia, Yongqiang; Wang, Zifei; Li, Qingping; Lv, Xiaoyi; Leng, Shudong; Zhang, Lunxiang; Zhang, Yi; Xiao, Bo; Yang, Shengxiong; Yang, Lei; Zhao, Jiafei; Song, Yongchen

doi:10.1016/j.apenergy.2022.119235

Cited by 58 publications

(22 citation statements)

References 63 publications

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“…The reservoir fluid of a gas reservoir is a mixture of hydrocarbon and non-hydrocarbon gases (CO 2 and H 2 S). There is a large number of natural gas fields containing non-hydrocarbon gases in China, including Puguang gas field in Sichuan, − ,− in which the content of hydrogen sulfide is 15–18% and that of carbon dioxide is 10%, belonging to the category of acid gas fields. Romania, Mexico, Argentina, and Indonesia have high carbon dioxide gas reservoirs, in which the concentration of carbon dioxide in the reservoir fluid is up to 86%, , whereas the content of carbon dioxide in natural gas produced in the Tugu Barat oilfield in Indonesia is up to 76% .…”

Section: Introductionmentioning

confidence: 99%

Effects of Gas Dissolution on Gas Migration during Gas Invasion in Drilling

Sun

et al. 2022

ACS Omega

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Sour gas reservoirs (including CO2 and H2S) are vulnerable to gas invasion when drilling into reservoir sections. The high solubility of the invaded gas in drilling fluid makes the gas invasion monitoring “hidden” and “sudden” for later expansion, and the blowout risk increases. Accurate prediction of gas dissolution is highly significant for monitoring gas invasion. In this study, the gas–liquid flow control equations considering gas dissolution were established. Focusing on the gas dissolution effect, a solubility experiment for CO2 and CH4 in an aqueous solution was performed using a phase equilibrium device. The experimental and simulation results revealed that the addition of CO2 can significantly increase gas dissolution, and the presence of salts decreases it. For solubility prediction of pure CH4 and CO2, the fugacity–activity solubility model, calculated using the Peng–Robinson equation of state, was more accurate than the Soave–Redlich–Kwong equation of state. The Soave–Redlich–Kwong equation of state has higher accuracy for the CO2 and CH4 gas mixture. If the gas dissolution effect is considered for wellbore gas–liquid flow, the time required for the mud pit gain to reach the early warning value increases. When the contents of CO2 and H2S in intrusive gases are higher, the time for mud pit gain change monitored on the ground increases, the concealment increases, and the risk of blowout increases.

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Section: Introductionmentioning

confidence: 99%

Effects of Gas Dissolution on Gas Migration during Gas Invasion in Drilling

Sun

et al. 2022

ACS Omega

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“…It validates the model’s predictive results through data measured in experiments, including parameters such as the timing, location, and quantity of hydrate formation. Additionally, the model could be validated by comparing data from existing engineering sites worldwide . However, the model in this paper involves large-scale, highly undulating, and complex pipeline structures, making laboratory loop data comparison validation unfeasible.…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, the model could be validated by comparing data from existing engineering sites worldwide. 10 However, the model in this paper involves large-scale, highly undulating, and complex pipeline structures, making laboratory loop data comparison validation unfeasible. Moreover, due to the peculiar composition of the fluid within the pipeline, there is hardly existing field application data with similar components worldwide.…”

Section: Model Validationmentioning

confidence: 99%

Behavior of Gas Hydrate Formation in Long-Distance Pipelines for CO₂ Transportation

Gao,

Jiang,

et al. 2023

Energy Fuels

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To address the escalating global carbon emissions and achieve the goal of carbon neutrality, the utilization of carbon capture, utilization, and storage (CCUS) technology is of crucial importance: with specific focus is the long-distance and large-volume CO2 transportation via pipelines. In this paper, we employ the OLGA software to construct a pipeline model that simulates and calculates hydrate formation in pipelines under various conditions, including extensive distances and complex operational scenarios. Initially, the impact of water content on hydrate generation in gas pipelines was analyzed, revealing an inverse relationship between the total amount of hydrate and the water content within a specific range. Furthermore, it was indicated that the presence of N2 in the flue gas significantly enhances the overall hydrate amount, which gradually decreases with an increase in the N2 percentage. The substantial effect of high pressure on promoting hydrate generation from a mixture of N2 and CO2 gases was investigated. In addition, a concise comparative analysis was conducted to identify the optimal inhibitor delivery scheme suitable for the pipeline configuration, considering both inhibition effectiveness and economic feasibility. The results could be of help revealing the performance of CO2 hydrate formation in the pipelines and proposing an inhibition strategy for an effective CO2 transportation.

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“…Materials such as MOFs, , active carbon, and other porous materials have been studied for gas adsorption storage. Specifically, gas hydrates are icelike solids composed of guest molecules and cage-structure host water molecules; they are formed under low-temperature and relatively moderate high-pressure conditions. , Gas hydrate-based technology has been applied in cold storage, seawater desalination, sewage treatment, and gas separation benefiting from the special cage structure. Moreover, the potential advantages of a large storage capacity (ideally 216 v/v for methane) with moderate formation conditions and self-preservation properties enable its use as an alternative way for gas storage. , The mixture of water with hydrophobic silica as dry water (DW) to store methane hydrate was found to provide a capacity of 175 v/v .…”

Section: Introductionmentioning

confidence: 99%

Magnetically Recyclable −SO₃^–-Coated Nanoparticles Promote Gas Storage via Forming Hydrates

Zhao

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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Efficient gas enrichment approaches are of great importance for the storage and transportation of clean energy and the sequestration of carbon dioxide. Of special interest is the regulated gas hydrate-based method; however, its operation requires adequate additives to overcome the lowstorage capacity issue. Thus, this method is not economically feasible or environmentally friendly. In this work, a novel recyclable hydrate promoter of copolystyrene-sodium styrenesulfonate@Fe 3 O 4 (PNS) nanoparticles with an integrated core−shell structure was synthesized through emulsion polymerization. This was found to effectively reduce the induction time of methane hydrate formation by one-third compared with the widely used sodium dodecyl sulfate (SDS); the corresponding gas storage capacity was also comparable, up to 155 v/v. In addition, the PNS nanoparticles showed a good performance in foam inhibition upon hydrate decomposition, which frequently occurred with the use of SDS and other surfactant-based promoters. In particular, the new promoters contributed to a more than 30% increase in CO 2 storage capacity, coacting with the fine sediments that mimic a marine environment. This provided further possibilities of sequestering CO 2 in the form a gas hydrate under the seafloor. The underlying mechanism was proposed to involve anchored surfactants on the surface and tiny channels between the nanoparticles that lead to rapid hydrate nucleation and controlled growth. The results showed that the integrated magnetically recovering nanoparticles developed in this study could improve the efficiency of gas storage by forming gas hydrates; the excellent recycling performance paved the way for solving the economic and environmental problems encountered in additive usage.

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Long-term numerical simulation of a joint production of gas hydrate and underlying shallow gas through dual horizontal wells in the South China Sea

Cited by 58 publications

References 63 publications

Effects of Gas Dissolution on Gas Migration during Gas Invasion in Drilling

Effects of Gas Dissolution on Gas Migration during Gas Invasion in Drilling

Behavior of Gas Hydrate Formation in Long-Distance Pipelines for CO₂ Transportation

Magnetically Recyclable −SO₃^–-Coated Nanoparticles Promote Gas Storage via Forming Hydrates

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Long-term numerical simulation of a joint production of gas hydrate and underlying shallow gas through dual horizontal wells in the South China Sea

Cited by 58 publications

References 63 publications

Effects of Gas Dissolution on Gas Migration during Gas Invasion in Drilling

Effects of Gas Dissolution on Gas Migration during Gas Invasion in Drilling

Behavior of Gas Hydrate Formation in Long-Distance Pipelines for CO2 Transportation

Magnetically Recyclable −SO3–-Coated Nanoparticles Promote Gas Storage via Forming Hydrates

Contact Info

Product

Resources

About

Behavior of Gas Hydrate Formation in Long-Distance Pipelines for CO₂ Transportation

Magnetically Recyclable −SO₃^–-Coated Nanoparticles Promote Gas Storage via Forming Hydrates