EP 2843185 A1 20150304 - UNDERGROUND COAL GASIFICATION METHOD
Title (en)
UNDERGROUND COAL GASIFICATION METHOD
Title (de)
UNTERIRDISCHES KOHLEVERGASUNGSVERFAHREN
Title (fr)
PROCÉDÉ DE GAZÉIFICATION SOUTERRAINE DU CHARBON
Publication
Application
Priority
- CN 201110255835 A 20110819
- CN 2012082067 W 20120926
Abstract (en)
An underground coal gasification method. The method comprises disposing multiple injection wells (3) and gas collection wells (4) in a gasification operation zone; adding a catalyst and a propping agent into injection wells and gas collection wells by means of a fluid medium; fracturing and reforming the coal layer using a fracturing device to form large areas of fissures and cracks; forming gasification paths in the form of directional wells between the injection wells and gas collection wells; adding a gasification agent, a catalyst, and water through the injection wells to cause coal layer combustions and chemical reactions; collecting at the gas collection wells the gas produced by means of collection devices. The fissure paths between the wells formed by reforming large fractures, and the metal mineral particles used as a propping agent for the paths between wells effectively enable the maintenance of the effective communication in the injection well network for long durations; the metal mineral particles also function as a catalyst and an aggregating agent during gasification, thereby substantially enhancing the coal gasification volume.
IPC 8 full level
E21B 43/267 (2006.01); E21B 43/295 (2006.01); E21B 43/30 (2006.01)
CPC (source: EP)
E21B 43/17 (2013.01); E21B 43/267 (2013.01); E21B 43/295 (2013.01)
Citation (search report)
See references of WO 2013026421A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2843185 A1 20150304; CN 102287177 A 20111221; EA 201400149 A1 20140630; WO 2013026421 A1 20130228
DOCDB simple family (application)
EP 12825017 A 20120926; CN 201110255835 A 20110819; CN 2012082067 W 20120926; EA 201400149 A 20120926