Splicing processing method for irregular seismic data

A seismic data and processing method technology, applied in the field of oil and gas field exploration, can solve the problems of seismic data differences, seismic trace quality impact, and imperfect data matching mechanism, etc., achieve fast positioning speed, high interpolation efficiency, and weaken the effect of data splicing traces

Active Publication Date: 2022-03-22
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0007] The purpose of the present invention is to provide a splicing processing method for irregular seismic data to solve seismic data splicing and abnormal traces of different processing grids, such as seismic grid conversion and interpolation of blank traces, noise traces and irregular data boundaries The results are affected by the quality of seismic traces; differences between different seismic data, imperfect data matching mechanism, and technical problems of data transition in overlapping areas

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  • Splicing processing method for irregular seismic data
  • Splicing processing method for irregular seismic data
  • Splicing processing method for irregular seismic data

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Embodiment Construction

[0078] In order to better understand the purpose, structure and function of the present invention, a splicing processing method for irregular seismic data of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0079] Such as Figure 1 to Figure 8-2 Shown, the present invention proposes on the basis of having studied following problem:

[0080] (1) The center points of the grids do not coincide due to the different measurement networks in the work area;

[0081] (2) The approximation degree and calculation speed of the inverse distance interpolation are better, but when the distance between the theoretical grid point and the actual grid point is relatively close, the interpolation coefficient is not stable enough and is affected by the seismic quality;

[0082] (3) The number of seismic traces is usually in the unit of one million. Searching for the address of the seismic trace is a link that takes up a lot of machin...

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Abstract

The invention discloses a splicing processing method for irregular seismic data. The splicing processing method comprises the following steps of: 1, inputting the surface element size, angular point grids and geodetic coordinates of each grid; 2, calculating the azimuth angle of the main measuring line; 3, generating a grid point space; 4, establishing a conversion relation of different grids, and carrying out secondary coordinate rotation on all grid point spaces; 5, scanning seismic data of grids needing to be converted, and storing seismic trace header information as a seismic dictionary; 6, querying the seismic dictionary to read corresponding seismic traces; 7, screening seismic traces meeting conditions; 8, generating a fusion coefficient; 9, outputting fusion data; and 10, ending. According to the method, grids of different seismic data are unified, and differences among different seismic data are corrected, so that transition of a data overlapping region is more natural and continuous; moreover, a four-neighborhood method and a Gaussian kernel function method are adopted to carry out the interpolation of the seismic trace, and data matching and fusion processing are completed, so that the stability of a weighting coefficient is ensured.

Description

technical field [0001] The invention belongs to the field of oil and gas field exploration, in particular to a splicing processing method for irregular seismic data. Background technique [0002] With the accelerated pace of exploration and the rapid development of oilfields, the 3D offshore data has been basically covered, even multiple times. Oil fields and mining areas are divided into dozens or hundreds of independent blocks by large and small seismic acquisition work areas, and each divided block must fully consider its seismic and geological conditions for acquisition design, such as: fracture combination method, The main direction of the fault, the target layer system, etc., may cause their processing grid origin, azimuth angle, and bin size to be different. [0003] With the rapid development of oilfields, the difficulty of exploration has further increased, and some cross-border or cooperation areas have become favorable directions for exploration. Horizons or faul...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
CPCG01V1/28G01V1/36
Inventor 陈平周东红张志军郭军谭辉煌李尧沈东义秦童徐德奎段新意丁洪波姜本厚
Owner CHINA NAT OFFSHORE OIL CORP
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