Underestimated risks for application of hydraulic fracturing into hydrate exploitation: In the perspective of formation deformation and sand production

Marine and Petroleum Geology, Год журнала: 2025, Номер unknown, С. 107393 - 107393

Опубликована: Март 1, 2025

Язык: Английский

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Mechanistic Understanding of Sand Production in Marine Hydrate Exploitation: Insights from Field Tests and THMC Simulations

Energy & Fuels, Год журнала: 2024, Номер 38(14), С. 12730 - 12740

Опубликована: Июль 4, 2024

The cessation of marine hydrate exploitation in the Nankai Trough resulted from severe sand production challenges. Currently, mechanisms underlying during reservoir lack comprehensive understanding. To address this knowledge gap, we developed a COMSOL-based computer model to predict gas and for exploitation, which efficiently integrated with convectional thermo-hydro-mechanical coupling model. In model, detachment skeletal particles sediments is regulated by both fluid erosion shear deformation. Specifically, when hydraulic gradient exceeds certain critical value meanwhile deformation also occurs, will detach migrate flowing fluids. Based on numerically simulated 2013 field test, conducted systematic analysis about mechanism. Our numerical simulations showed: (1) For weakly cemented sand-dominated sediments, moderate (>5) could potentially trigger particle detachment. Within 6-day test duration, cumulative volume reached 1.17 × 105 m3 26.9 generated, exhibiting striking alignment measured data, mere 3% deviation; (2) Due weak mechanical strength, overburden experienced more obvious than other areas, which, together its high gradient, led heightened Thus, provided main source production; (3) Both small depressurization amplitude low permeability tend accordingly constitute unfavorable conditions production. negative correlation well explains why occurred rather Shenhu area where have extremely permeability.

Язык: Английский

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Enhancing gas hydrate decomposition assisted by the shallow gas: Effects of interlayer permeability and depressurization strategies

Fuel, Год журнала: 2024, Номер 374, С. 132477 - 132477

Опубликована: Июль 15, 2024

Язык: Английский

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Numerical Study of Long-Term Natural Gas Production of Hydrate Composite Reservoirs in the South China Sea by Depressurization Using Horizontal Wells

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Язык: Английский

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Geomechanical Insights into CO2 Sequestration with Water Extraction: Surface Deformation and Sand Production

Energy, Год журнала: 2025, Номер unknown, С. 136396 - 136396

Опубликована: Май 1, 2025

Язык: Английский

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