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Velocity Spectrum Interpretation Method Based on Velocity Model

A velocity model and velocity spectrum technology, applied in seismic signal processing and other directions, can solve problems such as unreasonable and unreasonable layer velocities, and achieve the effect of shortening the processing cycle and reducing the manual workload.

Active Publication Date: 2019-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the results obtained purely based on the automatic interpretation of the velocity spectrum may not be very reasonable, resulting in unreasonable layer velocities

Method used

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  • Velocity Spectrum Interpretation Method Based on Velocity Model
  • Velocity Spectrum Interpretation Method Based on Velocity Model
  • Velocity Spectrum Interpretation Method Based on Velocity Model

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Embodiment Construction

[0032] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0033] figure 1 A flowchart showing a velocity spectrum interpretation method based on a velocity model and global optimization according to an exemplary embodiment, which includes the following steps:

[0034] Step 1: Generate the velocity spectrum using the common midpoint gather data of the surface seismic prestack data

[0035] First, the velocity spectrum is generated using common midpoint (CMP) gather data of surface seismic prestack...

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Abstract

A speed spectrum interpretation method based on a speed model comprises the following steps of step1, using ground earthquake prestack data common midpoint (CMP) trace gathering data to generate a speed spectrum; step2, determining an initial speed model function; step3, based on the initial speed model function, in the CMP, selecting at least one seed point and calculating an initial speed modelfunction at the seed point; and step4, taking the initial speed model function at the seed point as a constraint and picking a speed of the point with maximum spectrum energy on the speed spectrum along a time axis.

Description

technical field [0001] The invention relates to a velocity modeling technology in the field of seismic exploration and development of oil and gas and coalbed methane, in particular to a velocity spectrum interpretation method based on a velocity model. Background technique [0002] Seismic wave velocity is one of the most important parameters in seismic exploration, which runs through the whole process of seismic processing and interpretation. But at different stages, the source, meaning and application of seismic wave velocity are different. In the initial stage of seismic data processing, there is generally no suitable velocity model, and the stacking velocity must be obtained through conventional velocity analysis, and the stacking velocity is equal to the root mean square velocity, and the stacking section is obtained by dynamically correcting the stacking Either perform pre-stack time migration, or perform time-depth conversion based on the root mean square velocity mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30G01V1/28
Inventor 郑四连刘百红
Owner CHINA PETROLEUM & CHEM CORP
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