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鄂尔多斯盆地大宁—吉县地区是中石油对煤层气近期勘探中发现的一个高饱和煤层含气区，钻探的吉试1井、5井在煤层段试气获得了工业性气流，对今后我国中煤阶煤层气的勘探方向具有重要的影响。本文通过研究该区煤层厚度、煤层埋深、煤岩煤质特征、煤层演化特征、煤储层物性、煤层含气量、煤层气保存条件及资源量等条件，基本证实了大宁—吉县地区是一个整装的煤层气大气田，初步控制含气面积717 km2，控制煤层气地质储量1500×108m3。

DISTRIBUTION CHARACTERISTICS OF THE COALBED METHANE AT DANING-JIXIAN REGION IN E′ERDUOSI BASIN

Daning—Jixian region is a methanehighly saturated area found out by the PetroChina Ltd.in recent coalbed methane exploration.Commercial gas flow was obtained through testing at the intervals of coal measures in wells Jishi—1 and 5 ，which plays an important role in directing the mediam rank coalbed methane exploration in the future in China.On the basis of investigating the coalbed thick and burial depth，coal petrological characteristics，coal evolution features，coal reservoir petrophysical properties，coalbed methane content，preservation conditions and coalbed methane resources，etc.，in this region it was basically proved that Daning—Jixian region is a large integral coalbed methane field controlling approximately 717 km2 of methane bearing area and 150×109m3 of geological reserves.