METHOD FOR EXTRACTION OF GAS-HYDRATE DEPOSIT Russian patent published in 2005 - IPC

FIELD: gas industry.

SUBSTANCE: method includes drilling sub wells from bed with terminal high-pressure waters, laying lower relatively to gas-hydrate deposit, with horizontal branch under sole of gas-hydrate deposit for flowing thermal high-pressure bed water from lower level to higher level. Then gas extraction is performed while supporting pressure in extracted deposit and drilling gas-draining wells with vertical shaft to surface. First, at the beginning of gas-hydrate deposit sub well is drilled to bed with thermal high-pressure waters for feeding bed water into gas-hydrate deposit. Branch below soil of gas-hydrate deposit is made by horizontal wells. Then drilling is performed in upper portion of gas-hydrate deposit, of horizontal gas-draining wells with vertical shafts to surface. Thermal bed water debit, necessary to process 1 m³ of rock, is calculated from mathematical expression.

EFFECT: higher gas yield.

2 cl, 1 ex, 1 dwg