The Description And Identification Techniques Of Carboniferous-permian Coal Seam Fracture Characteristics Of Qinnan Block In Qinshui Basin

The Qinnan Block this dissertation studies is located in the south of Qinshui Basin East slope,vertically developing multiple sets of coal seams.Lateral stability and large thickness are No.15 coal seam,Taiyuan group of Carboniferous,and No.3 coal seam,Shanxi group of Permian.Qinshui Basin is a large synclinorium basin,nearly north-south formed in the Paleozoic basement.In Qinshui basin edge some large scale fault has already been developed,and the internal mainly secondary folds.Fracture has a leakage effect on coal-bed methane.The implementation of the fracture characteristics and the scope and size of the development zone of the micro fracture have important guiding significance to the drilling deployment.The dissertation uses the well logging data to make a detailed comparison of the coal seam,and unify the layer of coal seam,and complete fine calibration of the seismic characteristics of the coal seam,which based on the combination of the well data and seismic data.Then the seismic data interpretation system GeoEast is used to explain the structural interpretation,to describe the spatial distribution of the fault,and to further implement the spatial combination characteristics of the fault system.In the process of fault identification,it is mainly adopts technical means such as structure oriented filtering,coherent body,ant tracking technique and body curvature.Finally,this dissertation analyzes tectonic setting and tectonic evolution characteristics of the Qinnan Block,that is consistent with Qinshui Basin,and points out the favorable for coalbed methane enrichment region.