METHOD FOR TEMPORARY ISOLATION OF A GAS-BEARING STRATUM Russian patent published in 1994 - IPC

FIELD: oil and gas producing industry. SUBSTANCE: temperature is determined for well reservoir conditions. The well is provided with a bottom-hole choke. A hydrate forming gas is injected into the formation, the gas being compressed to the pressure higher than those of the formation. The gas injected through the bottom-hole choke. The gas flow rate is determined from a dependance presented in the description. The gas flow rate ensures the bottom-hole temperature reduction below the hydrate forming temperature. Then the pressure applied to the wellhead is increased. The gas injection is stopped. The bottom-hole area is filled with a foam and the borehole - with the well killing fluid. EFFECT: enlarged operating capabilities.