摘要：The tectonic stress field is one of the important factors to control the enrichment and high yield of coalbed methane, and it has a very important appli-cation in many links of coalbed methane exploration and development. Based on the investigation and analysis of the widely developed conjugate joints in the Mesozoic and Cenozoic strata in Baode block and its surrounding areas, this paper reconstructed the Mesozoic and Cenozoic tectonic stress field by using the method of tectonic geology. The analysis and investigation show that there are three major tec-tonic stress fields in the Mesozoic and Cenozoic in the area, and it is considered that the current in-situ stress direction is NE-SW. At the same time, the maximum and minimum horizontal principal stress of the main coal seam(No.8+9 coal)are calculated by using the DST data ofCBM Wells in the area, and the relationship between in-situ stress and permea-bility of coal seam is discussed. Based on the geo-stress data obtained, it is considered that NE-SW di-rection artificial fracture will occur in the fracturing process of the main coal seam in Baode block, and the pressure fracture is a vertical fracture extending along the direction of the maximum horizontal prin-cipal stress,and the well hole is relatively stable. On this basis, the optimal plan of CBM development well pattern is put forward, one is that the long diag-onal of rhombus is parallel to the direction of the maximum horizontal principal stress, the other is that the long diagonal of rhombus is parallel to the direc-tion of the dominant fracture.
