Evaluation method for favorable geological target in complex structure area

The invention discloses a method for evaluating a favorable geological target in a complex structure area. The method is specifically implemented according to the following steps: step 1, preparing and checking a work area structure data set; 2, fitting a structural surface according to the structural data in the step 1; 3, the maximum curvature Cmax, the minimum curvature Cmin and the direction factor delta of the fitting structural plane are calculated; step 4, calculating an evaluation parameter CIG; and 5, drawing an evaluation parameter CIG plane contour map, and determining a favorable exploration geological target in combination with a geological background. According to the method, new evaluation parameters are established on the basis of a curvature algorithm, a good effect is achieved in production, quantitative evaluation can be rapidly and accurately carried out on a geological exploration target in a complex structure area through combination of the basic principle of geomechanics and differentia