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Fine event flattening processing method for earthquake pre-stack gathers

A technology of pre-stack gathers and processing methods, which is applied in the field of event fine-leveling processing for seismic pre-stack gathers, and can solve the problems of inaccurate seismic exploration results and unequal events

Active Publication Date: 2013-01-16
PETROCHINA CO LTD
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Problems solved by technology

[0005] In order to solve the problem of uneven event in the prior art, resulting in inaccurate seismic exploration results, a fine event flattening method for seismic prestack gathers is provided

Method used

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  • Fine event flattening processing method for earthquake pre-stack gathers
  • Fine event flattening processing method for earthquake pre-stack gathers
  • Fine event flattening processing method for earthquake pre-stack gathers

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Embodiment Construction

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0054] Such as figure 1 It is a flow chart of a fine event flattening processing method for seismic prestack gathers provided by an embodiment of the present invention.

[0055] Step 101 is included, performing pre-processing operations of denoising, static correction, and dynamic correction on the collected seismic data.

[0056] Eliminate interfering waves such as surface waves and multiple waves by denoising; eliminate the impact on the shape of the time-distance curve due to uneven surface and different depths of excitation points through stat...

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Abstract

The invention relates to an earthquake pre-stack gather processing method in geophysical exploration, in particular to a fine event flattening processing method for earthquake pre-stack gathers. The fine event flattening processing method for earthquake pre-stack gathers includes pre-processing acquired earthquake data; extracting pre-stack gathers to be subjected to fine event flattening processing, and representing with a two-dimensional array D with line I and row J; setting a fine event flattening processing parameter; judging whether to set a flattening seed point at a central point of a certain waveform comparison window or not from window to window with Nw as size of the windows and Nm as movement amount of the windows, and calculating movement amount of the flattening seed point; calculating tensioning sampling coordinates; and performing fine event flattening according to the tensioning sampling coordinates. The method is of great significance to both processing and explanation of earthquake data and has the advantages of stability and high efficiency.

Description

technical field [0001] The invention relates to a method for processing seismic pre-stack gathers in geophysical exploration, in particular to a method for finely flattening the event of the seismic pre-stack gathers. Background technique [0002] Seismic exploration is a geophysical exploration method that uses the elastic difference of underground media to infer the nature and shape of underground rock formations by observing and analyzing the response of the earth to artificially excited seismic waves. Seismic prospecting is an important means of surveying oil and natural gas resources before drilling, and it is also widely used in coal field and engineering geological exploration, regional geological research and crustal research. [0003] Seismic exploration is mainly divided into three stages: seismic data acquisition, processing and interpretation. In the stage of seismic data acquisition, multiple coverage has become the most basic field acquisition method. The so-c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor 杨昊张研
Owner PETROCHINA CO LTD
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