Method and device for calculating content of organic carbon in source rock

The invention discloses a method and device for calculating the content of organic carbon in source rock and belongs to the field of petroleum geological prospecting. The method for calculating the content of the organic carbon in the source rock comprises the steps that a first shale content instruction is calculated according to a spontaneous potential logging curve, a second shale content instruction is calculated according to a natural gamma-ray logging curve, the lithological index of sand shale is calculated according to a neutron logging curve, a density logging curve and an interval transit time logging curve, the source rock is recognized in the sand shale according to the first shale content instruction, the second shale content instruction and the lithological index, and the content of the organic carbon in the source rock is calculated according to the density logging curve, the interval transit time logging curve and a resistivity logging curve. The device comprises a first calculation module, a second calculation module, a third calculation module, a recognition module and a fourth calculation module. According to the method and device for calculating the content of the organic carbon in the source rock, the accuracy of calculation of the content of the organic carbon in the source rock is improved through the multiple logging curves.