Quantitative research on the flow unit in reservoirs restricted by geologic factors

The conventional method for flow unit study based only on applied statistics, which neglects the complexity of geological variety, is inaccurate. A new multistep method of determination of flow units is applied in tidal-flat reservoirs in Talimu oilfield. Based on the construction of the high resolution sequence stratigraphic framework, the first step is to differentiate flow barriers from connected sandbodies. Then a clustering sample and a criterion function of different flow units are constructed according to two parameters (FZI and R35 ) and the distribution of flow units. With the results of well partition, a three-dimensional model of flow units was built up under the restriction of connected sandbodies. The example shows that the method of multistep flow unit study can be suitably applied in tidal-flat facies strata.