Abstract：In order to determine the controlling factors of shale gas accumulation of Longmaxi formation in Baojing block, the shale gas geological conditions and enrichment factors of Longmaxi formation were analyzed based on shale gas test. The mathematical statistics and comparative analysis methods were used for data analysis. The results show that the bottom lithology of Longmaxi formation is mainly composed by black carbonaceous mudstone and contains a large number of graptolites. The thickness of high quality shale section ranges 8¹6 m and TOC generally is close to 2%. The kerogen type is I and the average of Rois more than 2%, which has reached high maturity. The main pores are intergranular pores and organic pores with many microcracks.The pores are dominated by micropores and mesopore, which provide sufficient space for shale gas enrichment.The porosity and permeability are low. However, the brittle mineral content is high ( more than 43%) , which provides favorable conditions for later fracturing reconstruction. The key factors of shale gas enrichment are TOC, storage conditions, bottom of mud deep shelf facies, siliceous deep shelf facies and pore fracture system.

Keyword：shale gas;main controlling factor;geological condition;Longmaxi formation;Baojing block of Henan province;