Stochastic inversion is a kind of stochastic simulation technology based on geostatistics, as well as geologic structural framework model, well logging and seismic data. Taking layer as unit, that performs stochastic simulation by using spatial distribution regularity and spatial correlation of reservoir/oil and gas accumulation parameters, to acquire a set of equal probability parameter models of reservoir/oil and gas accumulation. Through many years study on optimizing process parameters of different calculation methods of stochastic simulation, company gained good effects in applying stochastic inversion in different regions.