Method for exploiting marinenatural gas hydrate through water current erosion method
A mining method and hydrate technology, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of less research, slow action of natural gas hydrate layers, and low efficiency of carbon dioxide replacement production, and achieve the goal of eliminating storage The effect of layer structure destruction
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[0017] The method for exploiting marine natural gas hydrate by water erosion method of the present invention adopts low-density mud drilling technology to drill a series of natural gas hydrate exploitation channels in the natural gas hydrate area, and use these exploitation channels to conduct water erosion exploitation of natural gas hydrate. Taking one group of mining channels as an example for illustration, a group of mining channels includes three channels: the pressure control and gas outlet channel in the middle, and the pressure control channels on both sides.
[0018] As shown in the figure, select three suitable drilling positions in the middle of the reservoir, use low-density mud drilling technology to drill three production channels in the natural gas hydrate occurrence area, and drill between the adjacent production channels in the hydrate reservoir. A number of horizontal water storage channels are drilled in between to store and withdraw an appropriate amount of ...
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