Analysis on a five-spot well for enhancing energy recovery from silty natural gas hydrate deposits in the South China Sea

Applied Energy, Journal Year: 2024, Volume and Issue: 376, P. 124237 - 124237

Published: Aug. 24, 2024

Language: Английский

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Sediment Instability Caused by Gas Production from Hydrate-Bearing Sediment in Northern South China Sea by Horizontal Wellbore: Sensitivity Analysis

Natural Resources Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Language: Английский

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Gas Production from Three-Phase Coexisting Sandy Hydrate Systems Induced by Depressurization: Insights into Water- and Gas-Rich Environments

Published: Jan. 1, 2024

Language: Английский

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Integrated test system for interfacial strength and morphology of multi-type hydrate-bearing sediments

Review of Scientific Instruments, Journal Year: 2024, Volume and Issue: 95(9)

Published: Sept. 1, 2024

Predicting the strength parameters of multi-type sediments containing hydrates is basis and precondition for safe efficient development natural gas hydrates. However, studies on shear mechanical behavior morphology hydrate-bearing (HBS) are still insufficient. Herein, this study presents an integrated test system that can be used to measure interfacial This device integrates specimen preparation, test, observation, data analysis, which helpful comprehensively evaluate strength, roughness, morphology. The propagation characteristics microfractures HBS during shearing obtained, favorable identifying damage failure modes. Preliminary validation experiments have been conducted massive pure hydrate, hydrate–sediment interface, homogenous verify applicability HBS. corresponding analysis method expected support evaluation morphology, thereby promoting a deeper understanding interactions mechanisms hydrate reservoirs.

Language: Английский

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Gas Production from Three-Phase Coexisting Sandy Hydrate Systems Induced by Depressurization: Insights into Water- and Gas-Rich Environments

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(22), P. 22069 - 22080

Published: Nov. 12, 2024

Natural gas hydrates, a new mineral resource distinct from traditional coal, oil, and gas, are considered potential successor energy source in the post-oil era. In this work, we experimentally simulated production process of sandy hydrate systems both water- gas-rich environments. Hydrate samples with saturation approximately 35% were prepared based on reservoir conditions Shenhu area South China Sea. decomposition, fluid flow, heat transfer characteristics induced by depressurization analyzed incorporating multiphase flow mechanism porous media. Results showed that compared to system, duration water-rich system could be reduced 4/9, although overall cycle was significantly longer. During stage, decomposition proceeded at higher rate than consuming more sensible reservoir. contrast, during constant pressure reversed, (k) decreasing half primarily due difference water content. For temperature rebound delayed water's high specific capacity. Nearly hydrates decomposed stable depressurization, phase accounting for only ∼5% total cycle, indicating efficiency reservoirs period. systems, intensive occurred stages, while evenly distributed across all stages. By end production, exhibited lower recovery rates but reservoirs, demonstrating presence free is beneficial actual production.

Language: Английский

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Estimating Mechanical Parameters of Hydrate-Bearing Sediments on Basis of Shear Wave Velocity Under Triaxial Compression

Journal of Ocean University of China, Journal Year: 2024, Volume and Issue: 23(6), P. 1481 - 1487

Published: Nov. 12, 2024

Language: Английский

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