Method for calculating shale content of high and low gamma interaction reservoirs

Disclosed is a method for calculating a shale content of high and low gamma interaction reservoirs. The method includes step one, influencing correction by means of a logging information environment; step two, calculating the shale content by means of spontaneous potential logging; step three, calculating the shale content by means of resistivity logging; step four, calculating the shale content by means of a compensated neutron-density method; step five, calculating the shale content by means of natural gamma-ray logging; step six, determining the shale content using a minimum value method on the basis of the shale contents calculated by using the previous four methods. According to the method for calculating the shale content of the high and low gamma interaction reservoirs, shale content calculations of a high gamma reservoir and a conventional reservoir are organically integrated, a calculated shale content curve basically overlaps with a shale content analyzed and tested by a lab, and accuracy of calculation of the shale content is greatly increased.