Method for filling empty region formed after exploitation of gas hydrate
A natural gas and hydrate technology, which is applied in the fields of filling, mining equipment, and earth-moving drilling, etc., can solve problems such as geological structure hazards, and achieve the effect of reducing mining costs and facilitating large-scale mining.
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[0010] in figure 1 In the wellbore (1) of the mining well, an artesian water pipeline (7) is installed. The upper end of the artesian water pipeline (7) is immersed in seawater (2), and the cavern area (11) after mining is installed in the underground There is a filling equipment (5), the inlet end of the filling equipment (5) is connected with the gravity water pipeline (7), the bottom of the wellbore (1) is gas hydrate (4), and the top of the gas hydrate (4) is On the continental shelf (3), when filling the post-harvest void area (11), prepare a small plastic film bag first, put the small plastic film bag on the filling pipe, open the control valve, and the gravity water pipeline (7 ) The seawater inside flows into the small plastic film bag through the filling equipment (5), and it is automatically sealed after being filled, and then the small plastic film bags filled with water are stacked in order in the post-harvest void area (11) Inside, a filling layer (6) composed of s...
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