Support of Gulf of Mexico Hydrate Research Consortium:  Activities to Support Establishment of a Sea Floor Monitoring Station Project

Woolsey, J. Robert; McGee, T. J.; Lutken, Carol; Stidham, Elizabeth

doi:10.2172/885933

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…In the limited number of field NGH production tests, the seafloor stability during methane production was closely monitored. Series of marine geophysical equipment based on seafloor environment monitor systems were developed, including the 3-component servo-accelerometer system and the tiltmeters and pressure sensors based on seafloor deformation monitoring system developed by Japan [28,29], the Gas Hydrate Sea-Floor Observatory developed by the USA [30], the three-dimensional environmental monitoring system and "four-in-one" environmental monitoring system developed by China [31,32]. The advantages of quick response, high-efficiency, and reflecting the real situation of sediment deformation accompanied by NGH production are obvious by these systems.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Interaction Effects between Reservoir Deformation and Hydrate Dissociation in Hydrate-Bearing Sediment by Depressurization Method

Wang

et al. 2021

Energies

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Natural gas hydrate (NGH) has been widely focused on having great potential for alternative energy. Numerous studies on gas production from hydrate-bearing sediments have been conducted in both laboratory and field. Since the strength of hydrate-bearing sediments depends on the saturation of NGH, the decomposition of NGH may cause the failure of sediments, then leading to reservoir deformation and other geological hazards. Plenty of research has shown that the reservoir deformation caused by hydrate decomposition is considerable. In order to investigate this, the influence of sediment deformation on the production of NGH, a fully coupled thermo-hydro-chemo-mechanical (THMC) model is established in this study. The interaction effects between reservoir deformation and hydrate dissociation are discussed by comparing the simulation results of the mechanical coupling and uncoupled models on the laboratory scale. Results show that obvious differences in behaviors between gas and water production are observed among these two models. Compared to the mechanical uncoupled model, the mechanical coupling model shows a significant compaction process when given a load equal to the initial pore pressure, which leads to a remarkable decrease of effective porosity and reservoir permeability, then delays the pore pressure drop rate and reduces the maximum gas production rate. It takes a longer time for gas production in the mechanical coupling model. Since the reservoir temperature is impacted by the comprehensive effects of the heat transfer from the boundary and the heat consumption of hydrate decomposition, the reduced maximum gas production rate and extended gas production process for the mechanical coupling model lead to the minimum reservoir temperature in the mechanical coupling model larger than that of the mechanical uncoupled model. The reduction of the effective porosity for the mechanical coupling model causes a larger cumulative water production. The results of this paper indicate that the reservoir deformation in the gas production process should be taken into account by laboratory and numerical methods to accurately predict the behaviors of gas production on the field scale.

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Section: Introductionmentioning

confidence: 99%

Investigating the Interaction Effects between Reservoir Deformation and Hydrate Dissociation in Hydrate-Bearing Sediment by Depressurization Method

Wang

et al. 2021

Energies

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Flume Experiment Evaluation of Resistivity Probes as a New Tool for Monitoring Gas Migration in Multilayered Sediments

Guo

Sun

et al. 2020

Applied Ocean Research

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Support of Gulf of Mexico Hydrate Research Consortium: Activities to Support Establishment of a Sea Floor Monitoring Station Project

Cited by 2 publications

References 16 publications

Investigating the Interaction Effects between Reservoir Deformation and Hydrate Dissociation in Hydrate-Bearing Sediment by Depressurization Method

Investigating the Interaction Effects between Reservoir Deformation and Hydrate Dissociation in Hydrate-Bearing Sediment by Depressurization Method

Flume Experiment Evaluation of Resistivity Probes as a New Tool for Monitoring Gas Migration in Multilayered Sediments

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