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Computing amplitude independent gradient for seismic velocity inversion in a frequency domain

A speed and gradient technology, applied in the field of seismic data processing, can solve time-consuming and unreliable problems

Active Publication Date: 2020-03-24
SAUDI ARABIAN OIL CO
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  • Claims
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Problems solved by technology

Therefore, existing inversion methods are time-consuming and unreliable

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  • Computing amplitude independent gradient for seismic velocity inversion in a frequency domain
  • Computing amplitude independent gradient for seismic velocity inversion in a frequency domain
  • Computing amplitude independent gradient for seismic velocity inversion in a frequency domain

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Embodiment Construction

[0017] The following detailed description describes computing amplitude-independent gradients of seismic velocity inversion in the frequency domain, and is presented to enable one skilled in the art to make and use the disclosed subject matter in the context of one or more detailed descriptions . Various modifications, changes and substitutions to the disclosed implementations will be apparent to those skilled in the art. The general principles defined in the disclosed embodiments can be applied to other embodiments and applications without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the described or illustrated embodiments but is to be accorded the widest scope consistent with the principles and features disclosed.

[0018] Seismic data may be collected for a target area including one or more subterranean formations by sending seismic waves at multiple source locations to the target area and recording refl...

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Abstract

A method for computing amplitude independent gradient for seismic velocity inversion in a frequency domain includes receiving seismic data associated with a region. The region comprises one or more earth subsurface layers represented by a plurality of points, and each point is associated with a seismic velocity. Seismic velocities at the plurality of points are determined by iteratively updating the seismic velocities based on a plurality of gradient values, where each gradient value corresponds to a point and is determined by evaluating a gradient of an objective function at a location of thepoint. A seismic image of the one or more earth subsurface layers is displayed based on the determined seismic velocities.

Description

[0001] priority claim [0002] This application claims priority to US Application No. 62 / 509,300, filed May 22, 2017, and US Application No. 15 / 956,261, filed April 18, 2018, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to seismic data processing. Background technique [0004] Velocity inversion is often used to build a reliable seismic velocity model for a target area, which can be used to image the subsurface structure of the target area. Ray tomography is a widely used velocity inversion method that exploits travel time information in recorded seismic data. However, ray tomography often requires manual picking of arrival events, which is time-consuming and often makes 3D model building unaffordable in practice. Additionally, ray-based inversion cannot handle complex regions, such as those with complex subsurface structures. A wave-based inversion method was also used. However, the full wavef...

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/303G01V2210/6222G01V1/282G01V2210/614G01V2210/52G01V1/362
Inventor 吴彦马玥曹雷刘红伟骆毅
Owner SAUDI ARABIAN OIL CO
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