东北石油大学学报2025，Vol.49Issue(3)：41-52,12.DOI:10.3969/j.issn.2095-4107.2025.03.004
织纳煤田三塘向斜6号煤层气成藏条件及富集影响因素
Accumulation conditions and enrichment influencing factors of No.6 coalbed methane in Santang Syncline,Zhina Coalfield
摘要
Abstract
Guizhou Province is the province with the richest coal and coalbed methane resources in South-ern China,but the geological conditions of coal measure strata are complex and the gas content varies greatly.Taking the No.6 coal seam in the Santang Syncline of the Zhina Coalfield as an example,ac-cording to the"multi-source and heterogeneous"data of coal mine and coalbed methane in the study are-a,the parameters of reservoir composition,physical properties,gas content and other parameters were extracted and digitized,Mathematical statistics and grey correlation method were used to analyze the re-lationship between the lithology of the direct top and bottom of the coal seam,the characteristics of coal quality,the degree of thermal evolution,the burial depth,the dip angle and the gas content,and the coalbed methane enrichment model was established.The results show that the vitrinite reflectance of No.6 coal seam is 2.84％-3.06％,the thickness is 0.84-6.75 m,and the buried depth is 150-1 000 m.The gas content is 4.29-27.01 m3/t,and the air content of the syncline wings is quite different.The capping property of coal seam direct roof lithological mudstone is better than that of siltstone and lime-stone.The gas content of the coal seam in the south and east flanks is greatly affected by the dip angle of the coal seam,while the gas content of the coal seams in the north and west flanks is mainly affected by the industrial analysis composition.The gas content of the coal seam increases with the increase of the organic components,vitrinite group,buried depth and thermal evolution degree of coal and rock,and decreases with the increase of inorganic components,inertinite formations and coal seam dip angles.The coalbed methane in the study area is an syncline gas enrichment mode,and the coalbed methane content is the highest near the critical depth of 1 000 m,which provides a theoretical basis for the explo-ration and development of coalbed methane in the Zhina Coalfield.关键词
织纳煤田/三塘向斜/龙潭组/煤层气/成藏条件/影响因素/富集模式Key words
Zhina Coalfield/Santang Syncline/Longtan Formation/coalbed methane/accumulation conditions/influencing factors/enrichment mode分类
能源科技引用本文复制引用
叶茂,吴章利,魏元龙,赵凌云,夏鹏,王科..织纳煤田三塘向斜6号煤层气成藏条件及富集影响因素[J].东北石油大学学报,2025,49(3):41-52,12.基金项目
贵州省地质勘查资金项目(52000021MGQSE7S7K6PRP) （52000021MGQSE7S7K6PRP）
贵州省科技支撑项目(黔科合支撑[2023]一般369) （黔科合支撑[2023]一般369）
贵州省科技计划项目(黔科合基础-ZK[2022]一般100) （黔科合基础-ZK[2022]一般100）
