Method and apparatus for predicting spatial distribution position of small-scale heterogeneous geologic body

Abstract

The invention discloses a method and apparatus for predicting spatial distribution position of small-scale heterogeneous geologic body. The method and apparatus are characterized by: using the characteristics of diffraction seismic waves of the small-scale heterogeneous geologic body to extract diffraction wave information from a pre-stack common offset gather and to conduct offset imaging on the diffraction wave information, then conducting attribute analysis which is conducive to prediction of spatial distribution of the small-scale heterogeneous geologic body on a diffraction wave imaging body, finally extracting spatial distribution parameters of the small-scale heterogeneous geologic body, and implementing prediction of the spatial distribution position of the small-scale heterogeneous geologic body in accordance with the extracted spatial distribution parameters. Therefore, the method addresses the prediction of spatial distribution of the small-scale heterogeneous geologic body, and is effective in predicting geologic bodies in areas with complex construction.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a small-scale heterogeneous geological body prediction method and device. Background technique [0002] With the development of geological exploration and development technology, the detection of some small-scale heterogeneous geological bodies, such as dust-killing points, small fault blocks, cracks, etc., has been paid more and more attention by the industry. The location information of these anomalous bodies is of great significance to the identification of oil and gas reservoirs. [0003] However, in the field of seismic exploration and development, traditional seismic data processing usually only uses reflected waves to obtain information on underground geological structures. This seismic data processing method is better for imaging large-scale continuous geological bodies such as layered sedimentary strata. Small geological bodies often appear as chaotic reflections i...

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Problems solved by technology

[0003] However, in the field of seismic exploration and development, traditional seismic data processing usually only uses reflected waves to obtain information on underground geological structures. This seismic data processing method is better for imaging large-scale continuous geological bodies such as layered sedimentary strata. Small geological bodies often show chaotic reflections in reflected wave imaging, which are difficult to distinguish from noise

[0004] Therefore, it is difficult to detect the spatial distribution of small-scale heterogeneous geological bodies using traditional seismic data processing methods

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