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  What Is Coalbed Methane ?  
  Coalbed Methane (CBM) is the gas that is retained by coalbeds in the subsurface. The gas is generated in-situ during coalification and is adsorbed on the coal's internal surface area. It is also known as Coalmine Methane (CMM) when it is released during mining operations. Coalbed methane production now accounts for approximately 8% of the total natural gas production in the United States.

Economically successful CBM projects are now found in most of the major natural gas producing basins within the lower 48 states and are in the early stages of evaluation in Alaska and Texas, as well as the province of Alberta, Canada.

The National Petroleum Council (“NPC”) 2003 report on natural gas, “Balancing Natural Gas Policy - Fueling the Demands of a Growing Economy” (http://www.npc.org/) shows that CBM will continue to grow as an important factor in the domestic natural gas supply.

The University of Colorado - Natural Resources Law Center (NRLC) has a very good on-line Coalbed Methane Primer.

Schematic of a typical producing coalbed methane well.  
   
   
   
   
   
   
   
   
   
   
   
   
  GENERIC SCHEMATIC FOR A PRODUCING COALBED METHANE WELL  
  Graphic showing Gamma Ray  Density Log response in Coal.  
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
  Download Adobe Reader TYPICAL GAMMA - RAY DENSITY LOG RESPONSE THROUGH A COAL INTERVAL  
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  Calvin Resources, Inc., located in Austin, Texas, is an independent energy company focused on the exploration for and development of natural gas and coalbed methane.
 
 

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