The Lower Carboniferous Jiusi Formation in Guizhou Province is one of the key study areas for the exploration of shale gas in the new area and new strata. A large amount of the survey work had been carried out in it，however little progress had been achieved. In this work，we evaluated the geological characteristics of the Lower Carboniferous Jiusi shale （eg. the distribution，geochemical characteristics，reservoir properties of the shale and the total gas content of the core samples） on the basis of outcrops data，core samples and laboratory analysis. It can be concluded that the Jiusi Formation is deposited in the lagoon and inter-platform basin environment. The organic matter of the black shale is typed as kerogen Ⅱ1 and Ⅱ2 in the southwest of Guizhou Province，and typed as kerogenⅠin the south of Guizhou Province. The total organic content of this samples are changing from 1% to 2%. Ro is in the range of 1%～2.5%. The influence of the thermal anomaly，which is caused by the hydrothermal mineral and hot spring，is likely to have a local influence but not common in the hole region. The percentage composition of quartz is bigger than 40%. The reservoir space is in the form of huge hole and middle-huge hole in the lower and upper strata of Jiusi Formation respectively. The porosity of the shale is range from 2.0%～10.0%. The gas bearing capacity is good in the south of Guizhou Province. The gas is in the absorbing state in the key layer. In the southwest，the gas is in the free state，which is controlled by the fault and ground stress. Meanwhile，three sweet spots are recognized by intersecting multiple factors in one map on the basis of above work and practical experience. The three sweet spots are located in the region of Wangmo-Ziyun-Luodian，Luodian-Kedu and Panlong-Shaomi respectively. The total area of them is more than 1 448 km2.
He Jianglin Liu Wei Yu Qian Qiu Zhen He Yongzhong Guo Tianxu Wang Zhengjiang Yang Ping. Geological characteristics of Lower Carboniferous Jiusi shale and its favorable area for shale gas exploration in Guizhou Province[J]. Chinese Journal of Geology, 2017, 52(1): 203-217.