| 摘要 |
<p>A method of underground coal gasification in a coal seam provided with an injection well, an ignition well, a production well, and a substantially horizontal wellbore linking the injection well and the production well, the wellbore having a device operably inserted therein, the device comprising: a pipe having an inlet end configured to receive oxidant from above ground, a plurality of discharge ports aligned along its length for discharging oxidant along a flow axis and a capped terminal end, the method including the steps of: a. igniting the coal seam using an ignition tool located within the ignition well; b. providing oxidant to the device for injection into the coal seam to support combustion and gasification of the coal seam at multiple points along the length of the wellbore linking the injection well and the production well; and c. withdrawing product gas from the production well.</p> |
