Observation system optimization design method based on stack response analysis

Abstract

The invention relates to an observation system optimization design method based on stack response analysis, which distinguishes the advantages and disadvantages of the observation system through analysis of three-dimensional observation system stack response. The method comprises the following steps of: determining the minimum circulating subarea of initially planed observation system; choosing a common central point trace gather deeply buried in a target layer; extracting corresponding model trace gather; weighting and stacking to obtain stack response of a surface element; solving the average amplitude value in the minimum circulating subarea and the amplitude standard deviation in the minimum circulating subarea; comparing the amplitude standard deviation so as to determine the advantages and disadvantages of the observation system; and choosing the observation system. According to the method, the amplitude standard deviation of the stack response is utilized to choose the observation system, so that illusion due to vision judgment is avoided, collected footprint due to the improper choose of the observation system is lowered, and signal to noise ratio and fidelity of seismic data are improved.

Description

technical field [0001] The invention relates to a geophysical prospecting method, which is an observation system optimization design method based on superposition response analysis for judging the pros and cons of the observation system by analyzing the superposition response of the three-dimensional observation system. Background technique [0002] Petroleum geophysical exploration is based on the theory of geophysics and petroleum geology, using corresponding geophysical instruments and equipment on the earth's surface (including land and sea), or recording underground information in the air or in wells, and through corresponding data processing and interpretation Obtain the physical properties (elasticity, electrical properties, magnetism, density, radioactivity) and structure of underground formations, and find the method of oil and gas hidden in the formations. [0003] Seismic prospecting is a commonly used method in geophysical prospecting. When implementing seismic p...

AI Technical Summary

Problems solved by technology

Due to the periodic rolling observation of the shot line and receiving line of the observation system, this method will cause periodic changes in attributes such as offset and azimuth, which will cause periodic changes in reflected wave amplitude, phase and other characteristics. Form "acquisition footprints" and affect the effect of observation system analysis

[0004] In the analysis of the observation system, only the observation system selected from the visual evaluation of the offset, azimuth, and coverage times is subject to human factors, and there is indeed a lack of scientific evaluation basis

At the same time, the observation system that only selects the observation system analysis from the offset, azimuth, and coverage times is not comprehensive.

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