Patent ID: 8760657

Claim:
A method of measuring and attributing fluid, geochemical and geomechanical properties to individual coal seams in a well penetrating multiple seams, comprising the steps of: (a) deploying a test string, comprising a straddle packer assembly, at least one valve assembly and two pressure gauges positioned at different heights above the valve assembly, into a well on a work string; (b) positioning the straddle packer across a coal seam and setting the packers to isolate the test string and work string from the remainder of the wellbore; (c) opening a valve above the straddle packer assembly to move fluid from the test string into the coal seam; (d) monitoring fluid injection rates and pressures at the coal seam during an injection period; (e) closing the valve above the straddle packer assembly and monitoring pressure at the coal seam during a fall-off period; (f) opening the valve above the straddle packer assembly to withdraw fluid from the coal seam into the work string, while simultaneously monitoring fluid properties entering the test string; and (g) continue withdrawing fluid from the coal seam into the test string above the straddle packer until the monitored fluid properties, including dissolved methane content, reach a steady state condition.