A Stochastic Inversion Method Based On Multi-Point Geostatistics

At present, stochastic inversion has gained increasing attention. Stochastic inversion can provide inverted results with higher resolution. Studies about multi-point geostatistics stochastic inversion are fewer because of a large amount of calculation and problems in simulating continuous variables. A stochastic inversion strategy based on multi-point geostatistics is put forward. This approach not only can effectively obtain accurate modeling facies in a few iterations because of the combination of probabilistic perturbation method, but also can quickly invert reservoir petrophysical properties such as porosity and shale content etc. through the simulated annealing algorithm and rock physics relationship. Test of model data certifies the feasibility and reliability of this strategy and inverted lithofacies and porosity with higher resolution and higher accuracy are output.