Method for fine calibration of position of sand shale thin interbed

A fine calibration, sand and mudstone technology, applied in the direction of seismic signal processing, etc., can solve the problems that affect the progress of oil and gas exploration and the calibration accuracy is not high

Inactive Publication Date: 2015-06-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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The above two methods start from the two parameters formed by synthetic records, which are reasonable to a certain extent, but ignore the characteristics of wavelet formation and study

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  • Method for fine calibration of position of sand shale thin interbed

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Embodiment Construction

[0026] In order to facilitate a further understanding of the method and the achieved effects of the present invention, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

[0027] In this paper, the different characteristics of wavelets are used to study the fine calibration process of thin interbedded layers of sand and mudstone, so as to improve the accuracy of fine calibration of thin interbedded layers of sand and mudstone. The key technologies include: ①Seismic section polarity judgment technology;② Extraction and application technology of different types of wavelets; ③ "secondary calibration technology"; ④ guiding role of seismic facies characteristics; ⑤ reflection coefficient sequence analysis technology. Based on the above-mentioned technical means, in the process of finely calibrating sand-mudstone thin interbedded horizons, the key is how to use the guidance of seismic facies models to realize The accurate matching of a...

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Abstract

The invention discloses a method for fine calibration of the position of a sand shale thin interbed. The method comprises the steps of 1, determining log layering and single well facies features of a marker bed and the sand shale thin interbed under the guiding of lithofacies and log facies modes; 2, loading seismic and logging data; 3, judging section polarity; 4, identifying and analyzing the seismic section features of the marker bed and the seismic facies features of the sand shale thin interbed; 5, determining the basic frequency of well side seismic channel seismic data by means of statistic wavelets, and selecting a Ricker wavelet of the basic frequency for primary calibration of the marker bed under the guiding of the seismic facies mode; 6, selecting a definite wavelet for secondary calibration; 7, adopting a time-varying wavelet for research of corresponding relation between a whole well and a multi-target stratum; 8, verifying a calibration result according to the relation between amplitude and reflection coefficient sequence envelope. The method has great basic significance for exploration, development, research and application of sand shale thin interbed oil deposit.

Description

technical field [0001] The present invention relates to a method for analyzing and calibrating beach bar sandstones in the field of petroleum exploration and development geology, and in particular refers to a method based on lithofacies division, combined with the corresponding relationship between logging data and seismic data, in geological stratification and On the basis of analyzing the characteristics of seismic horizons, through the application of different types of wavelets and the research of different calibration methods, it is a method of finely calibrating sand-mudstone thin interbedded horizons. Background technique [0002] At present, the comprehensive interpretation and analysis of lithofacies, logging and seismic data is the most basic and important comprehensive analysis method in the process of oil and gas exploration and development. Accurate calibration of thin sand-shale interbeds is the key factor for accurate structural interpretation, and it is also ...

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Application Information

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IPC IPC(8): G01V1/30
Inventor 栗宝鹃董春梅林承焰朱兆群张宪国尹桂红
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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