Method for conducting reservoir property simulation through multi-direction variation function analysis

Abstract

The invention provides a method for conducting reservoir property simulation through multi-direction variation function analysis. The method includes the steps that (1), sedimentary microfacies division is conducted according to the regional sedimentary feature; (2), partition is conducted in combination with the reservoir development direction on the basis of the sedimentary microfacies division; (3), variation functions with different phase bands are analyzed respectively for each partition; (4), simulation is conducted on property parameters, such as reservoir porosity and permeability on the basis of the accurate variation function adopting the mode of area dividing and phase belt dividing, and a property parameter model of a reservoir is obtained. By means of the method for conducting reservoir property simulation through multi-direction variation function analysis, the problems that in the process of reservoir property simulation, the meandering river sedimentary sand body is varied and the variation functions are simplex are solved, and a feasible method is provided for fluvial facies reservoir modeling.

Description

technical field [0001] The invention relates to the technical field of three-dimensional geological modeling of petroleum development geology, in particular to a method for simulating reservoir properties by using multi-directional variogram analysis. Background technique [0002] Reservoir fine geological modeling has become a key link in fine reservoir description in oilfield development. Establishing accurate reservoir property parameters (including porosity, permeability, oil saturation) model is the difficulty and key point of reservoir geological modeling. In the parametric simulation process, the variogram plays a key role. The variogram is a measure of the spatial variability of attribute parameters, which reflects the feature that the degree of spatial variability varies with distance. The variogram is used to statistically analyze the well point data to obtain the distribution law of the reservoir attribute parameters, which is used to control and constrain the s...

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Problems solved by technology

[0005] The present invention provides a method of using multi-directional variogram analysis in three-dimensional geological modeling to constrain the simulation of reservoir properties, so as to solve the problem of multiple sand bodies with multi-directional changes in the distribution of sand bodies on the plane or different distribution directions in a large range. , and the problem of a single direction of the variation function achieves the purpose of fine simulation of the attribute model

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