The present specification provides a method and device for determining an energy accumulation and repeated fracturing mode. The method comprises: performing different
modes of energy accumulation and repeated fracturing on a sealed target
core sample, the target
core sample having initial fracture characteristic data; determining a
fracture zone of the target
core sample after the different
modes of energy accumulation and repeated fracturing and extracting target fracture characteristic data of the
fracture zone; determining comprehensive fracture characteristic data according to the initial fracture characteristic data and the target fracture characteristic data, the comprehensive fracture characteristic data being used to determine fracturing effects of the different
modes of energy accumulation and repeated fracturing; comparing the comprehensive fracture characteristic data and selecting a target energy accumulation and repeated fracturing mode according to a comparison result. Based on the above method, an optimal energy accumulation and repeated fracturing mode can be selected, guidance can be provided for fracturing sites, and
oil well productivity can be improved.