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METHOD FOR DETECTING GAS OUTFLOW FROM AN UNDERGROUND GAS STORAGE LAYER BY MEANS OF PRESSURE MONITORING, AND AN UNDERGROUND GAS STORAGE SYSTEM
METHOD FOR DETECTING GAS OUTFLOW FROM AN UNDERGROUND GAS STORAGE LAYER BY MEANS OF PRESSURE MONITORING, AND AN UNDERGROUND GAS STORAGE SYSTEM
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机译：压力监测手段检测地下储气层瓦斯涌出量的方法及地下储气系统
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摘要
The present invention relates to an underground gas storage system and to a method for detecting gas outflow from an underground gas storage layer by means of pressure monitoring. The underground gas storage system according to the present invention comprises: a storage layer which is formed of a water-permeable rock material underground on the land or at sea; a stratified geological structure having a water-impermeable covering rock layer which is formed above the storage layer and having an upper water-permeable layer formed of a water-permeable rock material above the covering rock layer; a hollow casing which is inserted on the inside surface of a gas-injection well bored from above ground to the storage layer, and which is drilled with a plurality of gas-injection holes around the circumference in the portion disposed at the same depth as the storage layer; and a pressure sensor which is disposed at the same depth as the upper water-permeable layer and senses the pressure in the upper water-permeable layer. Also, in the method for detecting gas outflow from the underground gas storage layer by means of pressure monitoring according to the present invention, in an underground gas storage system having a configuration such as that above, gas outflow from the storage layer is detected by measuring changes in the pressure in the upper water-permeable layer via the pressure sensor which is provided in the upper water-permeable layer.
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