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Seismic data quality analyzing technique

A quality analysis, seismic data technology, applied in the field of petroleum geophysical exploration

Inactive Publication Date: 2011-02-09
BGP OF CHINA NAT GASOLINEEUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problems existing in the quality analysis method in the current seismic data acquisition and processing process, the present invention proposes a quick and effective seismic data quality quantitative analysis method without human interference

Method used

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Embodiment Construction

[0057] The present invention is described in detail below in conjunction with embodiment:

[0058] The seismic data quality analysis method adopts the following steps:

[0059] The concrete of the present invention is at first to select representative (as: best, medium and worst) shot collection (or detection point collection) data in the work area to carry out statistical quantitative analysis, after each finishing one-step processing, all will control analysis point Statistical quantitative analysis of data quality. The quantitative analysis method of seismic data quality is a new processing and analysis technology for quantitative analysis of seismic data in the time-frequency domain, mainly including time-frequency analysis, frequency-time analysis and signal-to-noise ratio analysis.

[0060] Concrete steps of the present invention are:

[0061] 1) According to the needs of the analysis, select the representative control point common shot set or common receiver point set...

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Abstract

The invention relates to an analytic technique of seismic data quality. The invention has the following steps: firstly, selecting control point common shot gathers data, determining the maximum analytical frequency, selecting and analyzing frequency band according to the range of the effective reflected signal frequency in a target block, carrying out frequency wave filtering to each seismic channel of the data each cannon to obtain the frequency demultiplication result of each channel; adopting a formula (1) to make time domain median filter to all seismic channels of each frequency band in each cannon to obtain the statistical energy curve results of each frequency band, drawing the statistical energy curve results of each frequency band in the same cannon on an identical chart to obtain a time-frequency analysis chart. The invention can quantitatively reflect the data quality of data control point rapidly and correctly, avoid errors in human analysis and obtain reliable results.

Description

technical field [0001] The invention relates to petroleum geophysical exploration technology, in particular to a seismic data quality analysis method for analyzing the data quality of seismic data acquisition and processing. technical background [0002] Seismic exploration is a general term for the method of using artificially excited seismic waves to survey the crustal structure and stratum lithology related to underground oil, natural gas and coal fields. Due to the different mechanical properties of underground media, seismic waves will cause spatial changes in the frequency, amplitude, phase, velocity, and wave field type of seismic waves during propagation, which can be obtained by using high-precision recording equipment and corresponding observation methods on the surface or underground. The data of these characteristic parameter changes are converted into images that geologists (including oil and gas field and coal field development engineers) can recognize after un...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30G01V1/22
Inventor 凌云高军
Owner BGP OF CHINA NAT GASOLINEEUM CORP
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