In-situ Detection and Analysis of Methane in Coal Bed Methane Formations with Spectrometers

摘要

The invention subject of this disclosure teaches a method of determining a production factor for a carbonaceous material reservoir, the method comprising: providing a well in a carbonaceous material reservoir; providing unsampled fluid at a depth in the well; placing a sensor adjacent to the unsampled fluid and performing a measurement on the unsampled fluid; using data from the measurement to determine a partial pressure of a solution gas in the carbonaceous material reservoir; and determining a production factor for the carbonaceous material reservoir from the partial pressure of the solution gas.

主权项

1. A method of measuring and assigning fluid, geochemical and geomechanical properties to individual coal seam in a well penetrating multiple coal 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 proximate to the coal seam and from the remainder of the wellbore. (c) opening a valve above the straddle packer assembly to allow fluid to flow from the coal seam into the work string, (d) monitoring fluid flow rates and pressures at the coal seam during a flow period. (e) monitoring fluid properties that have entered the test string. (f) continuing the flow period until the monitored fluid reach a steady state condition.