Density correction method for gamma-gamma density logging

The invention relates to the technical field of gamma-gamma density logging, and particularly provides a density correction method for gamma-gamma density logging, which comprises the following steps: acquiring a counting rate ratio RGGFR/NGR of a long-source detector GGFR and a natural gamma detector NGR and a counting rate ratio RGGNR/NGR of a short-source detector GGNR and the natural gamma detector NGR by using a model well; acquiring a density scale coefficient of the density logger; the density logging instrument is adopted for logging, and the counting rates NNGR, NGGFR and NGGNR of a natural gamma detector NGR, a long-source detector GGFR and a short-source detector GGNR are obtained; according to the obtained counting rates NNGR, NGGFR and NGGNR and the counting rate ratios RGGFR/NGR and RGGNR/NGR, the net counting rates of the long-source detector GGFR and the short-source detector GGNR are calculated and obtained, and correction of the counting rates for density parameter calculation is completed;