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《HEBEI COAL》 2000-01
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Devices & techniquies for coal-bed methane well test

Zhang Shi-fu,LI Zhijun (No. 1 Exploration Bureau of China National Adminis.of Coal Geology, Handan 056004, China)  
The devices for coal-bed methane well test are as follows:an injection pump system, a shut-off system,an underground tool string, a packer and pressure giving system, an oil tubing, a high accuracy electronics pressure gauge, a computor and an interpretation software. Injection/fall off well test is a kind of single well pressure transient measurement, which can provide parameters like follows: permeability, reservoir's pressure, skin factor, well-bore storage factor, reservoir's pressure gradient, in-situ stress gradient, breakout and close pressure of coal seam, reservoir's temp., radius of investigation,and so on.
【CateGory Index】: TD712
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