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Merging processing method of 2D seismic data of complex surfaces

A technology of seismic data and processing methods, applied in the direction of seismic signal processing, etc., can solve the problems that the section quality is difficult to meet the interpretation requirements, the boundary section structure is unclear, the seismic section is not satisfactory, etc., and achieves reliable processing results and clear structural shape. , the effect of high signal-to-noise

Active Publication Date: 2014-03-12
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0009] The seismic sections obtained by existing methods are not satisfactory, the boundary section structure is unclear, the signal-to-noise ratio is low, and the section quality cannot meet the requirements of interpretation. Therefore, it is necessary to improve the processing technology and process to continuously improve the quality of the final section. meet the requirements of explanation

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  • Merging processing method of 2D seismic data of complex surfaces
  • Merging processing method of 2D seismic data of complex surfaces
  • Merging processing method of 2D seismic data of complex surfaces

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specific Embodiment

[0099] A specific embodiment of the present invention is as follows:

[0100] There are a total of 56 survey lines in the full-stack 2D seismic contiguous processing in a certain work area, such as Figure 13 As shown, there are seven different years collected by different field units. The landform of this area is dominated by hills and mountains, with a small amount of flat land in the west. The overall terrain is high in the middle and low in the surrounding areas. The surface elevation changes sharply in the central and southern parts of the work area. Covered, red sandstone can be seen in some sections, gullies of different sizes cut the surface, and the relative height difference changes greatly.

[0101] On the basis of understanding the seismic geological conditions in the work area, field work methods and data quality, especially after careful and meticulous work, aiming at the characteristics of the field data, and closely combining the geological tasks and purposes, ...

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Abstract

The invention provides a merging processing method of 2D seismic data of complex surfaces, belonging to the field of data processing in geophysical exploration. The method is characterized by firstly establishing a spatial model of a 2D seismic data volume, secondly carrying out field one-step static computation on the spatial model of the 2D seismic data volume, thirdly carrying out field one-step static application, pre-stack noise elimination and fidelity and consistency processing on each 2D seismic line in the spatial model and finally improving the signal to noise ratio and resolution of a target layer. The method has the following beneficial effects: by utilizing the method to carry out merging processing on the 2D seismic data acquired in different years, when the profile is processed, the depth error is smaller than the normative index, the structural features are clear, reliable and closed, and the seismic profile which has high resolution, high fidelity and high signal to noise ratio and can more clearly reflect the structure and lithological change characteristics is processed, thus providing reliable processing result for seismic interpretation.

Description

technical field [0001] The invention belongs to the field of data processing in geophysical prospecting, and in particular relates to a method for continuous processing of two-dimensional seismic data of complicated ground surfaces. Background technique [0002] In complex surface areas, due to the complex seismic geological conditions, the extensive development of various interference energies, the quality of raw data and other factors, as well as the limitations of the use of shallow data in this area at that time, the following problems need to be solved for repeated processing. [0003] 1. Static correction problem [0004] In complex surface areas, the ravines are vertical and horizontal, and the surface velocity and thickness change sharply, and the shallow field data are inherently insufficient (the amount of micro-logging data is very small, and it is impossible to control the drastic changes in the surface layer in this type of space; the small refraction data is af...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor 黄德娟杨子兴肖万富丁国栋郑四连陈竹馨
Owner CHINA PETROLEUM & CHEM CORP
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