鄂尔多斯盆地延安组煤层对常规天然气的贡献率研究  

Contributing Ratio of Yan'an Formation Coal-bed to Conventional Natural Gases,Ordos Basin

作　　者：晋香兰[1] 张泓[1] 

机构地区：[1]煤炭科学研究总院西安研究院,陕西西安710054

出　　处：《天然气地球科学》2008年第5期662-664,689,共4页Natural Gas Geoscience

基　　金：煤炭科学研究总院青年创新基金(编号:2006QN14);国家重点基础研究计划("973")项目(编号:2003CB214602)联合资助

摘　　要：煤作为良好的烃源岩,其有机质特征、成烃贡献与煤的三大显微组分组及其变质程度密切相关。通过各显微组分组的生气特征分析和双参数坐标图解,确定延安组煤的生气能力属弱—中等,用产油指数和产气指数,确定延安组煤的的有机质类型为Ⅱ2—Ⅲ型。通过延安组煤的等温吸附实验中的吸附量与煤热模拟中各显微组分组产气量之间的关系,估算出延安组煤层对常规天然气的贡献率为36～78m3/t。Coal is usuallya good hydrocarbon source rock. Its organic matters character and contribution to hydrocarbon generation are closely related to three maceral groups and metamorphic grade of coal. The gas generating ability of coal of Yan＇an Formation is weak to medium according to the gas-generating character istics of macerals and bi parameter coordinate. The organic type of the coal isⅡ2-Ⅲ according to the index of oil and gas production. Based on the relationship of adsorption quality of coal in isotherm adsorption ex periment and the gas-generating quality of macerals in thermal simulation experiment, its contribution rati- o to conventional natural gas is 36 to 78 m^3/t.

关 键 词：鄂尔多斯盆地 延安组煤 有机质类型 生气能力 常规天然气 成烃贡献率 

分 类 号：TE122.1[石油与天然气工程—油气勘探]