| The reserves of Qinshui Basin is one of the biggest high coal rank gas field in the world. Atpresent, the pilot test of CBM exploitation is initiated all-around at the south of Qinshui Basin,which maybe indicate the upcoming of CBM commercial exploitation's breakthrough. AlthoughQinshui Basin is the hottest area for CBM exploitation at the moment in China, the recognitionof the characteristics of high coal rank reservoir is very weak, the same as the recognition ofenrichment and high-productivity area and master control factors for productivity, Because of thebiggest difference between coal reservoir and conventional reservoir. So further strengtheningthe study of the characteristics of coal reservoir, searching for the master control factors of highcoal rank CBM's enrichment, and evaluating of the enrichment and high-productivity area isvery important.The study of this paper is just based on this point. First of all, we research on the essentialcharacteristics of the coal reservoir, including the thickness, buried depth, coal type, coalquality,and metamorphism et. al. Subsequently, the characteristics ofporoperm, development ofcleat and fracture,adsorption and desorption ability, as also as gas beating characteristics etc.aredetailed elaborated. Then we make an inquiry on the CBM enrichment controlling factors frommany aspects, including stratum burial history,gas generating intensity, tecto- thermal events,hydrogeologic feature,structural feature et. al. After that, coalbed gas well's production processis analyzed. Productivity level is classified into five types. And then production Affection factorsare searched out. According to the preceding result, evaluation system for coalbed methaneenrichment and high-productivity area is builted up by using the fuzzy matter-element method.Four area in Qinshui Basin are optimized, in which the north of Yangcheng area and the south ofYangquan-Shouyang area have the biggest potentiality for high production.
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