Linear fracture extraction method and device

The invention provides a linear fracture extraction method and device. The method comprises the following steps: acquiring a seismic data volume according to acquired reflection seismic record data; performing coherent attribute calculation on the seismic data volume to determine a coherent attribute data volume; filtering the coherent attribute data volume by using a Garbor filter added with a crack fractal feature to extract profile data; and performing fault line extraction on the profile data by utilizing Beamlet transformation to determine a fracture data volume as a fracture extraction result. According to the method, structural optimization and discontinuous attribute coherent extraction are carried out on original seismic data, linear signal screening and extraction are carried out in a two-dimensional space of discontinuous attributes, and finally fracture information is obtained. The method is characterized in that linear structure feature extraction of the fault is taken as a feature, multiplicity