A Method for Discriminating the Direction of Geological Channels Based on Abnormal Curvature Strips

Abstract

The invention relates to a method for judging the direction of a geological channel based on an abnormal curvature strip, comprising the following steps: 1) calculating the curvature of the seismic waveform in the original seismic data to obtain the abnormal curvature body, and performing the maximum calculation on the target horizon of the abnormal curvature body Curvature plane attribute extraction to obtain the maximum curvature plane attribute of the target horizon of the abnormal curvature volume; 2) Denoising the maximum curvature plane attribute of the target horizon of the curvature abnormal body; 3) According to the maximum curvature plane attribute obtained after denoising processing , identify a single channel belt, including: 301) performing plane division of the plane attribute of the maximum curvature to obtain the distribution area of ​​abnormal curvature strips, and each distribution area of ​​abnormal curvature strips is the boundary of a single channel belt; 302) for different curvature abnormal strips Log response characteristic analysis is carried out in the belt distribution area to correct the boundary of the single channel belt; 4) In the distribution area of ​​each abnormal curvature strip, the abnormal curvature strips are connected in series to determine the direction of the dominant main line in the single channel.

Description

technical field [0001] The invention relates to the technical field of offshore oil and gas exploration and development, in particular to a method for judging the direction of a geological channel based on an abnormal curvature strip. Background technique [0002] The complex fluvial facies reservoirs dominated by meandering river sedimentary reservoirs occupy an important position in the developed oilfields in my country. Such reservoirs are faced with imperfect injection-production well pattern, unsatisfactory water flooding effect, and reserve production during water flooding development. The fundamental geological reasons for the problems such as low level and difficult deployment of adjustment wells are still unclear about the distribution direction of channel sand bodies. Under the condition of dense well pattern in onshore oilfields, the research on channel sand bodies has been very mature, and the fine anatomical technology and theory of architecture have been perfect...

AI Technical Summary

Problems solved by technology

However, for side-stacked continuous sheet sand bodies, the sand body plane is characterized by beaded distribution in all directions, which makes it difficult to effectively determine the channel distribution direction with conventional attributes reflecting sand body thickness changes. Researchers have also done a lot of research on this. Research work, in order to ensure the authenticity and rationality of the judgment results, but due to the problems of research ideas and geological model cognition, no major progress has been made

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