Method for plotting structural diagram of contour line of complex normal fault

Abstract

The invention relates to geophysical exploration key-drawing technique, especially a method for drawing a complex normal fault isoline structure diagram able to realize rectangular-grid automatic tracking, gridding discrete data to obtain grid file, searching an equivalent point on the four sides of the grid as well as the inner sides according to the user-set isoline starting value, then calculating the coordinates of the next equivalent point on the other three sides of the current grid unit, and according to that either line or column numbers of the two successive units that the isoline passes through are equal, setting a tracking program to automatically continue tracking until the whole isoline is completed. And as compared with the program of encrypting while tracking, it is simple and quick.

Description

technical field [0001] The invention relates to geophysical prospecting interpretation and mapping technology, in particular to a method for drawing complex normal fault isoline structural maps which can realize automatic tracking of rectangular grids. Background technique [0002] Since the contour map has important applications in many industries (such as petroleum, geology, water conservancy, chemical industry, meteorology, forestry, etc.), for example, when performing seismic interpretation work, it is necessary to draw a geological structure map, and it is required to have a complex fault combination. The function of gridding line (polygon) data and automatically tracing and drawing contour lines. At present, there are research results at home and abroad, but none of them can realize gridding and contour tracking of fault data. [0003] The original contour tracking algorithm technology has the following problems: slow calculation speed; contour lines are not smooth en...

AI Technical Summary

Problems solved by technology

At present, there are research results at home and abroad, but none of them can realize the gridding and contour tracking of fault data.

[0003] The original contour tracking algorithm technology has the following problems: slow calculation speed; contour lines are not smooth enough; the contact relationship between contour lines and faults is not good, and contour lines sometimes cross phenomenon near faults; when processing function calls To pass as many as dozens of parameters

However, in the grid of the geoscience system, because there are fault polygons as blocks and some grid nodes near the boundary are invalid values, the preconditions for the above simple classification are not established, and in most cases the initial contour line does not Closed, it needs to be extended to the fault polygon, and it needs to be traced in one direction and then traced in the reverse direction, and the contour segments of the traces in the two directions are connected and merged into a complete contour line, so it meets the actual The required contour tracking technique is more complex

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