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陕甘宁盆地是一个大型聚煤盆地,上古生界石炭—二叠系和中生界侏罗系是其两套主要的含煤层系。石炭—二叠系煤层镜质组含量高,热变质程度较高,含气量大,煤层气资源量为68×1012m3,有利勘探部位主要位于盆地东缘和西缘;侏罗系煤层镜质组含量较低,热变质程度低,含气量相对较小,煤层气资源量为42×1012m3,有利勘探目标主要分布在盆地内部。指出了上述两套层系的6个勘探目标,其中侏罗系煤层气有利目标区为:正宁地区、乌审旗地区;石炭—二叠系煤层气有利目标区为:吴堡—永和地区、韩城地区、银洞子地区、横山堡地区。
The Shan-Gan-Ning Basin is a large coal-polymetal basin. The Upper Paleozoic Carboniferous-Permian and Mesozoic Jurassic are two major coal-bearing strata. The Permian-Permian coal seam has high vitrinite content, high degree of thermal metamorphism, large gas content and 68 × 1012m3 of CBM resources. The favorable exploration sites are mainly located in the eastern margin and the western margin of the basin. The Jurassic coal seam mirror Lower quality metamorphism, low thermal metamorphism and relatively lower gas content, with a CBM resource of 42 × 1012m3. The favorable exploration targets are mainly distributed in the interior of the basin. The six exploration targets of the above two sets of strata are pointed out. The favorable target areas for the Jurassic coalbed methane are: Zhengning and Wushenqi areas; favorable target areas for the Carboniferous and Permian coalbed methane are Wugu-Yonghe area , Hancheng area, Silver Cave area, Yokoyama area.