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Method for inspecting surface structure

A surface structure and matrix technology, applied in the field of geophysical exploration, can solve the problems of high cost and slow speed, and achieve the effect of simple construction method and high accuracy of interpretation results

Inactive Publication Date: 2011-05-11
中石化石油工程技术服务有限公司
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Problems solved by technology

The micro-logging method is more accurate than the small refraction method, but the cost is higher than the small refraction method, and the speed is relatively slow

Method used

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  • Method for inspecting surface structure
  • Method for inspecting surface structure
  • Method for inspecting surface structure

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Embodiment Construction

[0021] Such as figure 1 and figure 2 As shown, the present invention provides a method of investigating surface structure, the method comprising:

[0022] (a) Extract the actual travel time of the first arrival wave from the seismic wave data collected on multiple seismic traces along the seismic line, and form the actual travel time matrix;

[0023] (b) Obtaining a velocity matrix or a slowness matrix for reflecting the surface structure based on the tomographic inversion method according to the actual travel time matrix of the first arrival wave;

[0024] (c) Establishing a speed-depth relationship model for reflecting surface structure or a slowness-depth relationship model for reflecting surface structure based on the velocity matrix or slowness matrix for reflecting surface structure obtained in step (b).

[0025] Wherein step (b) comprises the following steps:

[0026] (b1) For a given initial velocity matrix or initial slowness matrix, calculate the theoretical trav...

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Abstract

The invention provides a method for inspecting a surface structure, which comprises the steps of: a, extracting first-motion wave real arrival time from seismic wave data acquired by a plurality of seismic channels along seismic survey lines and forming a real arrival time matrix; b, obtaining a velocity matrix or slowness matrix used for reflecting the surface structure according to the real arrival time matrix based on a chromatography inversion method; and c, establishing a model used for reflecting the relationship of the velocity and the depth of the surface structure or a model used forreflecting the relationship of the slowness and the depth of the surface structure based on the velocity matrix or slowness matrix used for reflecting the surface structure and obtained from the stepb. The method for obtaining the near surface structure, provided by the invention, has low cost, high speed and wide application range and is very effective.

Description

technical field [0001] The present invention relates to the field of geophysical prospecting, and more particularly to a method of investigating surface structure. Background technique [0002] Seismic exploration is to generate seismic waves through artificial excitation, and to explore the underground geological conditions by studying the propagation laws of seismic waves in strata with different elasticity. The main process of seismic exploration can be divided into three stages: seismic data acquisition, seismic data processing and seismic data interpretation, and finally get geological results. [0003] Seismic data collection is to generate seismic waves by artificial methods, such as using explosives as the source, detonating explosives to generate seismic waves, and then using seismic receiving instruments to record ground vibration signals caused by seismic waves reflected back from the ground, and obtaining corresponding geological profiles through calculation and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 刘胜杨继友钟家均余文科邓飞
Owner 中石化石油工程技术服务有限公司
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