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Semi-analytical Estimation of Surface Subsidence During Gas Recovery from Hydrate Reservoirs Under Indian Conditions
In this study, preliminary estimation of the surface subsidence during a depressurization-induced gas recovery from the reservoirs of Krishna-Godavari basin has been performed. A multi-phase, multi-component-based flow solver, specifically designed for gas hydrate dissociation physics has been utilized. The reservoir-specific data for the model calculations has been taken from NGHP-02 expedition results. The pore pressure field obtainable from the reservoir simulator has been utilized to calculate the subsidence based on a semi-analytical model developed on nucleus of strain theory. The reservoir shape is assumed to be cylindrical and an axisymmetric plane is considered for the simulation. Results are generated by varying operational parameters and characteristics of reservoir. Results indicate a linear relationship between pressure decline and surface subsidence, which is a realistic case for many other oil and gas reservoirs. The subsidence is also observed to be a strong function of depth of the reservoir and Poisson's ratio.
Semi-analytical Estimation of Surface Subsidence During Gas Recovery from Hydrate Reservoirs Under Indian Conditions
In this study, preliminary estimation of the surface subsidence during a depressurization-induced gas recovery from the reservoirs of Krishna-Godavari basin has been performed. A multi-phase, multi-component-based flow solver, specifically designed for gas hydrate dissociation physics has been utilized. The reservoir-specific data for the model calculations has been taken from NGHP-02 expedition results. The pore pressure field obtainable from the reservoir simulator has been utilized to calculate the subsidence based on a semi-analytical model developed on nucleus of strain theory. The reservoir shape is assumed to be cylindrical and an axisymmetric plane is considered for the simulation. Results are generated by varying operational parameters and characteristics of reservoir. Results indicate a linear relationship between pressure decline and surface subsidence, which is a realistic case for many other oil and gas reservoirs. The subsidence is also observed to be a strong function of depth of the reservoir and Poisson's ratio.
Semi-analytical Estimation of Surface Subsidence During Gas Recovery from Hydrate Reservoirs Under Indian Conditions
Lecture Notes in Civil Engineering
Haldar, Sumanta (editor) / Patra, Shantanu (editor) / Ghanekar, Ravindra K. (editor) / Yadav, Rahul (author) / Singh, Raghavendra P. (author) / Das, Malay K. (author)
2020-09-04
13 pages
Article/Chapter (Book)
Electronic Resource
English
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