Lower palaeozoic tilted stratum true thickness calculation method

Abstract

The invention provides a lower palaeozoic tilted stratum true thickness calculation method, comprising: a first step of performing fine layer interpretation on a plurality of standard reflection layers; a second step of: performing depth conversion on time layer data based on the standard reflection layers, and making a plane isobath map; a third step of calculating stratum thickness parameters; and a fourth step of calculating stratum true thickness. The lower palaeozoic tilted stratum true thickness calculation method is simple and easy to operate, and can improve the calculation accuracy of stratum true thickness, better understand lower palaeozoic stratum growth and predict each segment of reservoir stratums.

Description

Technical field [0001] The invention relates to the technical field of oil field development, in particular to a method for obtaining the true thickness of the Lower Paleozoic oblique strata. Background technique [0002] Stratum thickness refers to the vertical distance between the top and bottom of the strata. It reflects the development of the stratum in the geological history period. The accurate determination of stratum thickness is important for clarifying the settlement history of a region and the distribution characteristics of the strata. important meaning. [0003] The Paleozoic in the Bohai Bay Basin is basically the same as that in North China. It is a standard platform-type sedimentation. The Lower Paleozoic Cambrian and Ordovician are mostly obliquely dipping on the edge of the depression or on the paleoland slope. Under the third line. The marine carbonate rocks developed in the Lower Paleozoic can be transformed and influenced by diagenetic epigenesis such as diss...

AI Technical Summary

Problems solved by technology

This calculation method is mainly used in mineral exploration and field geological surveys. The parameters are relatively complicated, and the discrimination of each parameter is completed by manual judgment and calculation, which is not suitable for oil and gas exploration.

[0007] At present, seismic data are widely used in petroleum geological exploration, and stratum thickness is generally calculated through fine interpretation of stratum top and bottom seismic, time-depth conversion, and subtraction of top and bottom plane depths to obtain the vertical thickness of the stratum, which roughly reflects the The sedimentary state and stratum development of this set of strata, but this method is not applicable to the calculation of the thickness of the Lower Paleozoic strata, and there are large errors in the development of the Lower Paleozoic oblique strata and reservoir prediction

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