舒兰盆地水曲柳矿区煤层气富集因素分析  

Analysis of CBM Enriching Factors in Shuiquliu Mining Area in the Shulan Basin

作　　者：张坤[1,2] 吴克平[3] 柳蓉[1,2] Zhang Kunl, Wu Keping Liu Rongl,(Jilin University, Changchun, Jilin 130061, China Jilin Key Laboratory of Oil Shale and Symbiotic Energy Minerals, Changchun, Jilin 130061, China Jilin Coalfield Geology Bureau, Changchun, Jilin 130061, China)

机构地区：[1]吉林大学,吉林长春130061 [2]吉林省油页岩及共生能源矿产重点实验室,吉林长春130061 [3]吉林省煤田地质局,吉林长春130061

出　　处：《特种油气藏》2017年第3期44-48,共5页Special Oil & Gas Reservoirs

基　　金：国家自然科学青年基金"梅河盆地古近系梅河组煤与油页岩有机质差异富集与共生机理"(41302097);吉林省煤田局重大专项"吉林省煤层气资源评价"(3R215CS94422)

摘　　要：水曲柳矿区位于低煤阶含煤盆地,依据地质及钻井资料、实验数据,运用煤层气地质学、构造地质学及沉积学原理对水曲柳矿区低煤阶煤层气的成藏条件和富集因素进行深入分析。研究表明,水曲柳矿区煤层具有煤阶低、煤层薄、煤层多的特点,煤级为低煤阶,处于快速生气阶段,具有较高的生气潜力。同时,煤层气的储集层具有较好的储集物性特征。三角洲和湖泊沼泽相垂向叠置沉积形成了良好的煤层气顶底板,为煤层气成藏提供良好的圈闭条件。复杂的构造运动不仅为煤层气的富集成藏提供了良好的向斜构造形态和压扭性正断层,而且使该地区煤层的割理和内生裂隙极其发育,有利于煤层气的渗透与运移;在水文地质方面,水力封闭作用使煤层气更好的保存成藏。该文优选出水曲柳镇至柴家屯一带为煤层气富集成藏的有利区块。该区块具有巨大的煤层气勘探开发潜力。该研究将促进东北地区低煤阶煤层气勘探开发的进程。Based on geology,drilling and experiment data,using coal bed methane（ CBM） geology,tectonic geology and sedimentology principles,the forming conditions and enriching factors of the CBM with low coal ranks in Shuiquliu mining area were deeply analyzed. The study results show that the coal beds in Shuiquliu mining area are characterized with low coal ranks,small thicknesses and more coal beds,being at quick gas generation stage,with higher gas generation potential. The vertical overlying deposits of delta facies and lake paludal facies formed favorable top and bottom plates of CBM,and provided fine trap condition for CBM accumulation. The complex tectonic movements provided good syncline structural form and compresso-shear normal faults for CBM accumulation,and also generated many cleats and endogenic fractures in coal beds in this area,which is favorable for CBM seepage and migration. In hydrologic geology,the hydraulic sealing process provided better preservation condition for CBM accumulation. In this paper,the region from Shuiquliu town to Chaijiatun village was selected as the favorable block for CBM accumulation. This block has huge CBM exploration and development potential. This study will promote the exploration and development process of low rank CBM in northeastern China.

关 键 词：成藏条件 煤层气富集因素 水曲柳矿区 舒兰盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]