SULPHUR BARRIER FOR USE IN PROCESSES AT DEPOSIT LOCATION FOR BED PROCESSING Russian patent published in 2012 - IPC E21B33/138 

FIELD: gas and oil production.

SUBSTANCE: method involves sulphur injection into one or more wellbores inside operation perimetre in a bed with minimum operation area permeability of 0.1 Darcy, and at least a part of sulphur should be able to move towards the bed parts with temperature below sulphur melting point, so that suplhur would solidify in the bed and form a barrier. Area adjoining wellbores is heated above sulphur melting point but below hydrocarbon hydrolysis temperature, further heating is stopped to cool the bed down in natural way so that sulphur solidifies in the bed. Method of barrier forming in bed involves heating of a bed part adjoining several wellbores to raise bed temperature near wellbores to a point above sulphur melting point but below hydrocarbon hydrolysis temperature, sulphur injection to the bed through at least some wellbores and ensuring sulphur movement from wellbores towards the bed parts with temperature below sulphur melting point so that suplhur solidifies in the bed and forms a barrier.

EFFECT: increased insulation efficiency.

20 cl, 2 dwg