FIELD: oil and gas industry.
SUBSTANCE: method involves drilling of an air injection hole and gas removal hole in a coal bed, including setting of pipe string, connection of holes in the bed by hydraulic fracturing with formation of a channel. Ferric oxide is loaded into a channel; at that quantity of ferric oxide is equal to 0.25-0.35 of the mass of gasifiable coal bed. Coal ignition is made by coal bed heating up to 300-500°C. Superheated steam of the same temperature is supplied to the channel and combustible gas with hydrogen content of 17-34% and calorific capacity of 6.5-15.2 MJ/m3 depending on the process temperature is removed through the gas removal hole.
EFFECT: increase of calorific capacity and hydrogen quantity for combustible gas, degree of coal conversion into combustible gas.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| GASIFICATION OF COAL IN BOWELS | 2013 |
|
RU2535934C2 |
| METHOD OF PRODUCING HYDROGEN-RICH COMBUSTIBLE GAS | 2011 |
|
RU2462503C1 |
| UNDERGROUND GASIFICATION OF BROWN COAL FIN AND MID-THICKNESS SEAMS | 2012 |
|
RU2522785C1 |
| COMPLEX DEVELOPMENT METHOD OF UNDERGROUND COAL FORMATION THROUGH WELLS | 2013 |
|
RU2539517C2 |
| SET FOR UNDERGROUND GASIFICATION OF FUEL | 2020 |
|
RU2748170C1 |
| INSTALLATION FOR UNDERGROUND GASIFICATION OF FUEL | 2015 |
|
RU2595126C1 |
| METHOD FOR UNDERGROUND GASIFICATION OF COAL SEAM | 1995 |
|
RU2099517C1 |
| UTILISATION METHOD OF WORN-OUT AUTOMOBILE TYRES AT DEVELOPMENT OF COAL BEDS BY UNDERGROUND GASIFICATION METHOD | 2009 |
|
RU2435954C2 |
| METHOD AND FACILITIES TO REALIZE COAL STRATUMS UNDERGROUND DEVELOPMENT | 1992 |
|
RU2046949C1 |
| METHOD OF GASIFICATION OF SOLID FUEL AND DEVICE FOR ITS IMPLEMENTATION | 2017 |
|
RU2668447C1 |
