Deep Coal Reservoir Characteristics and Gas-bearing Potential of the Ordos Basin, China

Shengli Gao, P. Gao
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Abstract

Previously, the study of the coal reservoir characteristics in China has been focused on the shallow coal seam (<1500 m), but less attention has been paid to the deep coal reservoir (>1500 m). Thus, the exploration and development of CBM resources is hindered. This paper aims to investigate the deep CBM at 1755m-1764m in the second member of the upper Paleozoic Shanxi Formation and that at 1815m-1833m in the second member of the upper Paleozoic Taiyuan Formation with the gas content and other parameters from wireline coring in Well Gu 1.The results show that the Shenmu area has the low-medium rank coal with the high vitrinite content and the medium-high gas-bearing potential. This study provides insight into the gas content of the coal seam deeper than 1500m and establishes a basis for evaluating the 1500m-2000m deep CBM resources within the Ordos Basin. Keywords—deep coalbed methane; coal reservoir characteristics; coal seam gas bearing potential; Ordos Basin
鄂尔多斯盆地深部煤储层特征及含气潜力
以往,中国对煤储层特征的研究主要集中在1500 m的浅层煤层,阻碍了煤层气资源的勘探开发。利用古1井电缆取心的含气量等参数,对上古生界山西组二段1755m ~ 1764m和上古生界太原组二段1815m ~ 1833m的深部煤层气进行了研究。结果表明,神木地区具有镜质组含量高的中低阶煤,具有中高含气潜力。该研究为深入了解1500m以上煤层含气量提供了依据,为鄂尔多斯盆地1500 ~ 2000m深部煤层气资源评价奠定了基础。关键词:深层煤层气;煤储层特征;煤层含气潜力;鄂尔多斯盆地
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