Seismic 3D Velocity Scanning and Focusing Imaging Method

A technology of focused imaging and speed scanning, which is applied in the field of engineering geophysical prospecting, can solve the problems of stacking speed changes and inability to perform high-precision imaging, and achieve the effect of improving the signal-to-noise ratio
CN104765066BActive Publication Date: 2017-07-21ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Publication Date
2017-07-21

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Abstract

The invention relates to a seismic three-dimensional wave velocity scanning focusing imaging method. The steps are as follows: collecting seismic reflection wave signal records by means of coverage observation; extracting common reflection point signal records according to the seismic reflection wave signal records; performing velocity scanning on the imaging calculation section, The energy map of the calculated profile is obtained; the profile energy maps scanned at different speeds are superimposed, and the three-dimensional image technology is used for focused imaging. The invention scans and images the velocity within a certain range, realizes the velocity layered scanning, avoids losing a lot of useful information due to directly taking the maximum value after scanning and stacking, and directly performs high-precision imaging on the complex changing wave velocity profile under arbitrary terrain conditions; It can be widely used in water conservancy, roads, bridges, tunnels and municipal prediction and detection, as well as oil, gas, coal and mineral exploration and prediction.
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Description

Technical field

[0001] The invention relates to the technical field of engineering geophysical prospecting, in particular to a seismic three-dimensional wave velocity scanning focusing imaging method. Background technique

[0002] The processing of seismic reflection data can generally be divided into four stages: preprocessing, parameter analysis processing, conventional processing and data interpretation processing. In the process of data interpretation and processing, seismic imaging is the final stage of many processing methods. Currently, pre-stack time migration imaging, pre-stack depth migration imaging and diffraction scan migration imaging based on ray theory are commonly used. Pre-stack time migration can only solve the problem of superposition of common reflection points, but cannot solve the problem that the imaging point and the underground diffraction point do not overlap. Therefore, pre-stack time migration is mainly used in areas where the underground lateral vel...

Claims

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