Reservoir stratification method and device based on astronomical cycle

Abstract

The present invention provides a method and device for stratification of reservoirs based on astronomical cycles. The method for stratification of reservoirs based on astronomical cycles includes: determining the long eccentricity of the astronomical cycles of the target block according to the logging data of the target block. , short eccentricity and precession; build the stratigraphic framework of the target block based on the long eccentricity, short eccentricity and precession; under the stratigraphic framework, according to the long eccentricity, short eccentricity and precession A reservoir of the target block is determined. The method and device for reservoir layer determination based on astronomical cycles provided by the present invention apply astronomical cycles to oil and gas exploration for the first time, and better solve the problems of high-precision stratigraphic correlation of deep-water reservoirs and division of cycles within a large set of glutenite bodies .

Description

technical field [0001] The invention relates to the technical field of oil and natural gas exploration, in particular to a method and device for layer determination of reservoir bodies based on astronomical cycles. Background technique [0002] At present, sequence stratigraphy methods are mainly used at home and abroad for isochronous framework division and horizon determination of reservoirs. However, sequence stratigraphy uses relative water depth changes as the basis for stratigraphic division ( figure 1 as well as figure 2 ,exist figure 2 The depths of deep lakes and deep seas vary from several hundred meters to several kilometers, so the general scale changes of the sea (lake) level (several meters to several tens of meters) have little effect on the deep water environment, and it is difficult to cause the rock formation of deep water reservoirs. sexual changes. In practice, the lithology and color changes of the rock are used as the stratigraphic interface. Seq...

AI Technical Summary

Problems solved by technology

Since there is no obvious lithology or lithofacies change inside the large set of glutenite reservoirs, the traditional stratigraphic division method, sequence stratigraphy, cannot solve the difficult problem of internal stage division of large sets of glutenite reservoirs ( image 3 )

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