Research And Development Of Reservoir Characteristics Of Coalbed Methane In Hunan Shaoyang Duanpiqiao Mining Area

The coal-bearing strata in the short-Pi bridge research area of shaoyang city of hunan province are the lower Permian longtan formation,which is located in the coal-bearing syncline with relatively good coal-accumulating conditions.It is a coastal delta environmental deposit developed in a complete lagoon environment.Based on the regional background,regional structure,regional coal-bearing strata,sedimentary environment and geological factors such as the thickness and depth of coal seam in the research area,combined with the geological survey and detailed investigation of coal in the research area and the drainage and production conditions of two parameter Wells(ZK2303,ZK2707),the rock mechanics characteristics,reservoir permeability and gas-bearing property of coal reservoirs in the research area were analyzed.The production and recovery rate were predicted and the suitable parameters were selected to calculate the resource reserves.and the critical desorption pressure is high,all of which are favorable areas.The productivity simulation of 5 kinds of network spacing is carried out.The initial selection of 250m×250m network spacing is suitable for the next pilot implementation plan.