In-situ Detection and Analysis of Methane in Coal Bed Methane Formations with Spectrometers
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.
1 . A system for measuring a chemical in a subsurface formation comprising
(a) housing component traversable within the well;
(b) a guide extending down the well from a fixed location being operatively connected to the housing;
(c) a radiation source;
(d) an optical pathway between a sample and detector wherein the detector is located at the ground surface.
2 . The system of claim 1 further comprising a spectrometer located at the ground surface.
3 . The system of claim 2 further comprising a measuring system including a radiation source and detector to calculate a concentration in a sample including but not limited to use of a laboratory-generated mathematical relationship between instrument response and concentration.
4 . The system of claim 1 further comprising a probe containing a radiation source capable of being place down a well and optically connected to a spectrometer located at the ground surface.
5 . The system of claim 4 further comprising a positioner to position the probe near a side surface of a borehole
6 . A method for reducing long distance transmission of radiation comprising
(a) placing a radiation source in a housing;
(b) placing a housing down in a well bore;
(c) lowering a spectrometer down the well bore
(d) controlling movement of a spectrometer by a guide wire controller at the ground surface.
7 . A method of radiating a sample comprising
(a) transmitting the radiation through at least one optical pathway;
(b) interacting a sample with the radiation
(c) producing characteristic radiation from the sample and transmitting by an optical pathway to a detector located in a spectrometer
8 . The method of claim 7 wherein the spectrometer is located at the surface.
9 . The method of claim 7 comprising powering the radiation source with a battery or guide wire.