The embodiment of the invention provides crack prediction method and device. The method comprises the following steps of: acquiring
prestack common midpoint dynamic correction gathering seismic data and related parameters for carrying out crack prediction; generating corresponding index data according to the
prestack common midpoint dynamic correction gathering seismic data and acquiring
horizon data according to post-stack seismic
data interpretation; generating conventional broad
azimuth prestack common midpoint dynamic correction gathering data from the prestack common midpoint dynamic correction gathering seismic data according to conventional narrow
azimuth prestack common midpoint dynamic correction gathering data; acquiring the relevant trace header information of each seismic channel according to the conventional wide
azimuth prestack common midpoint dynamic correction gathering data; calculating the azimuth angle of each seismic channel by utilizing the acquired trace header information; acquiring the reflection amplitude of each seismic channel by utilizing a
pickup time window by taking a destination layer as a
pickup center; and carrying out elliptical fitting by utilizing the acquired azimuth angle and the acquired reflection amplitude so as to determine the crack direction and the crack density. The embodiment can improve the prediction precision of a crack reservoir stratum, can not only realize the three-dimensional prediction on the crack reservoir stratum, but also carry out the two-dimensional prediction, thereby improving the success ratio of a
prospecting well and a drilling well.