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Three-dimensional high-precision bin fractionation processing and evaluation technology for seismic data

A technology of seismic data and evaluation method, applied in the direction of seismic signal processing, etc., can solve the problems of commercial software without processing modules and technologies, etc., achieve significant development effect, great promotion value, and improve the effect of exploration accuracy

Inactive Publication Date: 2012-11-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Under the condition of subdivided bins, how to select the appropriate processing method and processing parameters to improve the quality of data processing, especially in combination with large-scale and high-precision actual data on land for targeted processing, commercial software does not have dedicated processing in this regard Modules and technologies, theoretical research and practical applications are rarely reported at home and abroad

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  • Three-dimensional high-precision bin fractionation processing and evaluation technology for seismic data
  • Three-dimensional high-precision bin fractionation processing and evaluation technology for seismic data
  • Three-dimensional high-precision bin fractionation processing and evaluation technology for seismic data

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Embodiment Construction

[0026] 1) By analyzing the original data and performing track head modification, grid definition and linear motion correction on the data obtained by the observation system, a pre-stack multi-domain composite denoising map is obtained.

[0027] 2) Through the relationship between bin subdivision and signal-to-noise ratio, bin subdivision and coverage times based on forward modeling, and comprehensively compensate the amplitude, the tomographic inversion refracted wave static correction map is obtained.

[0028] 3) By analyzing the quantitative relationship between bin subdivision and longitudinal resolution and lateral resolution, and optimizing the deconvolution of the pre-stack shot domain, and then through the bin subdivision and velocity optimization analysis of the azimuth constraints, the grade-by-level scores are obtained. Frequency residual static correction map.

[0029] 4) After several times of 3D prestack migration, a 3D prestack migration velocity model is establi...

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Abstract

The invention provides a three-dimensional high-precision bin fractionation processing and evaluation technology for seismic data, and the method comprises the following steps: analyzing original data, and carrying out trace header modification, grid definition and linear normal moveout correction on data acquired by an observation system, thus acquiring a prestack multi-domain composite denoisedimage; based on the relationship between bin fractionation and the signal-to-noise ratio as well as the relationship between bin fractionation and the multiplicity during forward modeling, comprehensively compensating for the vibration amplitude, thus acquiring a tomographic inversion refracted wave static correction image; analyzing the quantitative relationship between bin fractionation and thelongitudinal resolution and lateral resolution, carrying out prestack shot-domain optimized deconvolution, and carrying out azimuth restrained bin fractionation and speed optimized analysis, thus acquiring a progressive frequency-divided residual correction image; and carrying out multiple three-dimensional prestack migrations, and establishing a three-dimensional prestack migration speed model, thus acquiring a prestack migration image. Thus, the method provided by the invention provides a reliable guarantee for improving the exploration development precision and upgrading a seismic exploration technology.

Description

Technical field [0001] The invention relates to a seismic data processing method, in particular to a high-precision three-dimensional seismic data processing technology, which is of great significance to high-precision exploration and high-density exploration currently carried out in oil fields. Background technique [0002] High-precision data has the characteristics of small trace spacing, small sampling interval, and small bins. Under the condition of subdivided bins, how to select the appropriate processing method and processing parameters to improve the quality of data processing, especially in combination with large-scale and high-precision actual data on land for targeted processing, commercial software does not have dedicated processing in this regard Modules and technologies, theoretical research and practical applications are rarely reported at home and abroad. Contents of the invention [0003] The purpose of the present invention is to provide a subdivision pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36G01V1/30
Inventor 张军华单联瑜徐辉傅金荣于海铖步长城周振晓郑旭刚王静
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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