Study on coalbed methane reservoir strata characteristics of X block in Santang syncline of Guizhou Zhina coalfield
Zhao Hengyi;;Zou Jianghai;;Yang Yongyu
为了查明贵州织纳煤田三塘向斜内煤层气储层特征,通过露头、录井、测井、试井等资料,开展了室内实验、测井曲线分析等内容综合分析。研究表明,三塘向斜内主要含煤地层为龙潭组,煤层层数多而薄,煤体结构以碎裂煤和原生结构煤为主,主要煤层含气量在8.98 ~ 18.05 m3/t,孔隙度在1.47% ~ 7.67%,渗透率在0.027 1 ~ 0.21 mD,节理缝连通性较好,微裂缝发育,部分被充填。研究取得的成果对三塘向斜后续煤层气规模化开发时压裂地质选层提供了参考依据,具有一定的指导意义。
In order to find out the reservoir strata characteristics of coalbed methane in Santang syncline of Zhina coalfield in Guizhou, the comprehensive analysis of indoor experiment and logging curve analysis was carried out by outcrop, logging, well test and other data. The research showed that the main coal bearing strata in Santang syncline was Longtan Formation, the number of coal strata was many and thin, the coal body structure was mainly cataclastic coal and primary structural coal, the gas content of the main coal seam was 8.98 ~ 18.05 m3/t, the porosity was 1.47% ~ 7.67 %, the permeability was 0.027 1 ~ 0.21 mD, the joint fracture connectivity was good, and the micro-fracture was developed and partially filled. The result obtained in this study provided a reference for the selection of fracturing geological strata in the subsequent large-scale development of coalbed methane in Santang syncline, which had certain guiding significance.
Zhina coalfield;Santang syncline;Longtan Formation;reservoir strata characteristics
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会