【作者】 黄孝波； 毛绍胜； 姚嘉； 张水根； 邹勇军；

【Author】 HUANG Xiaobo;MAO Shaosheng;YAO Jia;ZHANG Shuigen;ZOU Yongjun;Jiangxi Institute of Coalfield Geological Exploration Research;Jiangxi Institute of Shale Gas Research;

【机构】 江西省煤田地质勘察研究院； 江西省页岩气研究院；

【摘要】 萍乐坳陷是江西省最重要的产煤基地,二叠系上统龙潭组含煤地层稳定、埋藏适中、地层厚度大、有机质含量高、热演化程度已经达到成熟—过成熟阶段,是较好的煤成气源岩;丰城—高安—樟树地区生储盖组合好、埋深适中、构造简单—中等,是煤成气勘探的理想区块;小江边组泥岩厚度大,有机质丰度高,热演化程度适中,大面积连续分布,也是很好的气源岩,但是工作程度较低,今后应该重视;初步估算萍乐坳陷煤成气资源量为1446.20×10~8m~3,具有良好的勘探前景。更多还原

【Abstract】 Ping-le depression is one of the most productive areas of coal in Jiangxi Province.From the analysis of distribution trends of strata and the evolution of source rock.It is suggested that the coal and coal measured mudstone of Longtan Formation in later Permian is stable and has huge thickness.Also it is buried in a relatively suitable depth for development as well as has high organic matter content and high thermal evolution.It shows that the later Permian Longtan Formation coal and coal measured mudstone are good coal genetic gas source rock.Through the comparison analysis of different block in Ping-le depression,Fengcheng—Gaoan—Zhangshu block is the best place for coal genetic gas exploration.Due to the block has a better source rock—reservoir—cap rock system,suitable buried depth as well as better tectonic than other block in Ping-le depression.Although hasn t well research yet,Xiaojiangbian Formation in Middle Permian is good gas source rock as well,for it has huge thickness and high organic matter content,moderate thermal evolution degree as well as full distribution,it should pay more attention in the further research.The estimated content of coal genetic gas resource in Ping-le depression is about 1446.20 × 108m~3.It shows good exploration prospection.更多还原