GAS LEAK DETECTOR FOR INTRA-BEDROCK GAS STORAGE FACILITY AND GAS LEAK DETECTING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a gas leak detector for an intra bedrock gas storage facility using a bedrock cavity, having high precision and promptly locating gas leak, and a gas leak detecting method.;SOLUTION: This gas leak detector 2 comprises boreholes 3, electrodes 4, and a measuring instrument 6. The intra bedrock gas storage facility 1 utilizes a cavity part in bedrock formed by digging out the bedrock 8 into a cylindrical shape, and the cavity part is filled with stored gas 5. Near the periphery of the storage facility 1, the plurality of boreholes 3 are provided so as to surround the storage facility and to extend vertically or obliquely at prescribed distances centering around the storage facility 1. The boreholes 3 are formed by boring deeper than a position where the storage facility 1 is installed and the plurality of electrodes 4 are disposed therein at prescribed intervals from hole inlets to hole bottoms. The electrodes 4 are connected to the measuring instrument 6 on the ground, and potential response is measured by the measuring instrument 6 when an electric current is passed through the bedrock 8 via the electrodes 4.;COPYRIGHT: (C)2004,JPO