Processing method and device of seismic imaging

A processing method and imaging technology, which is applied in the field of geophysical exploration, can solve problems such as static correction, limited imaging range, and low imaging accuracy of high and steep structures, and achieve high resolution and avoid the effects of deformation

Inactive Publication Date: 2017-04-26
PETROCHINA CO LTD
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Problems solved by technology

However, due to the constraints of the observation system, the imaging range of the traditional VSP is not only limited, but also faces problems such as static correction and near-surface velocity modeling, and the imaging accuracy of high and steep structures is also not high.

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  • Processing method and device of seismic imaging
  • Processing method and device of seismic imaging

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Embodiment Construction

[0040] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0041] figure 1 It is a method flowchart of an embodiment of the seismic imaging processing method provided by the present application, such as figure 1 As shown, the method may include:

[0042] Step 1: Set up a reference geophone in the excitation well at a preset distance from the target.

[0043] As mentioned above, in seismic expl...

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Abstract

The invention provides a processing method and device of seismic imaging. The method comprises that 1) a reference wave detector is arranged in an excitation well in a preset distance to an object; 2) a reflection wave signal received by a first wave detector in the excitation well is obtained; 3) a direct wave signal excited by a first seismic center and received by the reference wave detector is obtained, and correlation between the direct wave signal and the reflection wave signal is calculated; and 4) reflection wave signals excited by other seismic centers are received from the first wave detector are obtained one by one, the steps 2) and 3) are repeated, correlation signals between the direct waves received by the reference wave detector and the reflection wave signals are calculated, a sum of the correlation signals is calculated, and a reconstruction signal of the reference wave detector is generated. The method and device can reduce the sensitivity of static correction and a near-land-surface speed model, and improve the imaging precision of a high steep structure.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a processing method and device for seismic imaging. Background technique [0002] With the in-depth development of seismic exploration, oil and gas exploration in medium-deep and ultra-deep layers has received more and more attention. Deep oil and gas exploration is closely related to imaging of deep structures, and the accuracy of deep structure imaging is affected by many factors, such as static correction, near-surface velocity modeling, and migration parameter settings. Among them, near-surface velocity modeling factors are related to key technologies such as velocity modeling quality, static correction accuracy, and deep imaging. High-steep structures are a common type of deep structures. Accurate detection of high-steep structures is of great significance for the petroleum industry to evaluate traps, the scope of reservoirs, oil and gas migration status, an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/282
Inventor 梁上林徐基祥孙夕平李凌高
Owner PETROCHINA CO LTD
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