1. School of Energy Resource,China University of Geosciences(Beijing),Beijing　 100083,China; 2. Key Laboratory of Marine Reservoir Evolution and Hydro-carbon Enrichment Mechanism,Ministry of Education,Beijing　 100083,China; 3. Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering,Beijing　 100083,China; 4. The Coal Geological Exploration Institute of Hunan Province,Changsha　 410014,China; 5. Wuhan Center of China Geological Survey,Wuhan　 430205,China

Based on the comprehensive experimental results incorporated with drilling data in Shaoyang depression,the coal-bearing strata were studied as a whole. The coal measure gas in lateral extension and vertical sequences and its accumulation and combination characteristics were investigated. Based on the study of representative wells in the study area,the favorable segment of unconventional gas and the gas types in the coal measure had been identified. It shows that shale plays a key role on coal measure reservoir in the study area,and Ceshui Formation primarily developed shale-related lithological association and shale gas-coalbed methane. It should be recognized that the distribution of Ce- shui Formation is unstable in Shaoyang depression,which leads to the different combination characteristics of coal measure gas in different areas. For example,coal plays a decisive role in the area of coal accumulation center.

国家科技重大专项资助项目(2017ZX05035)；湖南省国土资源厅科研资助项目(2015-01)；海外及港澳学者合作研究基金资助项目(41728005)；

XI Zhaodong,TANG Shuheng,YANG Guoqiao,et al. Accumulation and combination characteristics of coal measure gas of Shaoyang de- pression in the central Hunan[J]. Journal of China Coal Society,2018,43(6):1589-1597.