The prediction method of the sand body outside the delta is put forward, that is, through logging curve pretreatment, seismic synthetic record making, virtual mudstone time window technology, curve reconstruction inversion and other technical means, the purpose of thin differential reservoir prediction is realized. It has been proved that the field application of the results in the oilfield is mainly reflected in two aspects: One is to guide the division of sedimentary microfacies, the other is the application of risk well location deployment. That is to say, the idea of well point phasing and inversion section configuration is adopted to guide the drawing of sedimentary microfacies in key units of putaohua reservoir. In other words, based on the comprehensive understanding of the structure and thin differential reservoir geology, a cross⁃fault horizontal well is successfully deployed by adopting the method of exploration and evaluation well injection optimization and implementing the "four injection and one production" well pattern principle. Therefore, the proposed reconstruction inversion method can be used as an effective technical means for characterization of thin differential reservoirs, which is of great significance for further exploration of oil⁃bearing potential of thin differential reservoirs.