Automatic forward and reverse fault isoline generating method based on enhanced rectangular grid

Abstract

The invention relates to an automatic forward and reverse fault isoline generating method based on the enhanced rectangular grid. The automatic forward and reverse fault isoline generating method includes steps of establishing intersection topological relation between fault polygons according to given seismic horizons and fault polygon data, configuring the enhanced rectangular grid on the basis of fault polygon intersection topological relation, partitioning a horizon data point set on the basis of rectangular grid data structure of the intersection topological relation and projecting data to a computing grid unit, establishing a discrete smooth interpolation equation, forming an overall discrete smooth interpolation linear equation system by local discrete smooth interpolation equations of all nodes, iteratively solving to obtain interpolation faults indicated by the enhanced grid for tracking and generating the isoline. The automatic forward and reverse fault isoline generating method based on the enhanced rectangular grid solves the problem of handwork interaction in constructing images of many reverse faults, especially repeated overthrusts and overcomes the problems of low accuracy and efficiency in the prior art and complexity of repeated overthrusts or inaccurate results.

Description

Technical field [0001] The present invention is a supporting technology for petroleum geophysical seismic geological structure interpretation and mapping. It aims to solve the problem that the current structure interpretation has forward and over-thrust faults, especially when there are multiple over-thrust faults, it is impossible to automatically and efficiently generate structural contour maps and three-dimensional structural modeling. The problem. Background technique [0002] In petroleum geophysical seismic and geological structure interpretation, the automatic mapping of forward and reverse faults under complex structures, especially the gridded contours of multiple overturning faults, has always been a major difficulty in the field of geoscience mapping. At present, most mainstream seismic interpretation structure mapping systems can only solve the problem of normal fault mapping. For reverse fault mapping problems, interpreters mainly use manual segmentation and recombin...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for automatically generating contours of forward and reverse faults based on enhanced rectangular grids, so as to solve the problem that a large number of manual interactions are required in the prior art when constructing a map with a large number of reverse faults, especially multiple overthrust faults. Or it is difficult to generate a structural contour map that meets the accuracy, thereby overcoming the problems of low accuracy, low efficiency, inability to deal with multiple overthrow complex situations or incorrect results in the prior art

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