Creating device of petroleum seismic structural map

Abstract

The invention provides a creating device of a petroleum seismic structural map. The device creates isolines of the petroleum seismic structural map according to the profile data of seismic information, a triangulated irregular network is established according to the discrete data of the isolines, the position relation between adjacent isolines of the isolines is acquired and a point to be inserted is positioned in a triangle of the triangulated irregular network according to the topological structure of the triangulated irregular network; any two of three peaks beside the common point of three adjacent triangles of the triangle in which the point to be inserted is positioned are selected to be combined with the common point, and a quadric surface passing by the common point is acquired bythe following formula: f (x, y) = a + bx + cy + dx2 + ey2, wherein a, b, c, d and e are natural numbers, and (x, y) is the coordinate of the common point; then accumulation average operation is carried out on the plurality of acquired quadric surfaces so as to obtain a quadric surface trend surface passing by the common point; and then the change of the area between adjacent isolines is restrained according to the quadric surface trend surface and the empty circumcircle property and the maximum and minimum angle properties of the triangulated irregular network.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a device for establishing a petroleum seismic structure map. Background technique [0002] Petroleum seismic structure map is a planar or three-dimensional map based on seismic data. It uses isolines (isobaths or isochrones) and some symbols to visually show the undulation of a certain stratum underground. form. Two types of profiles are usually used in seismic data interpretation: the profile in which the depth is expressed in time (seconds) is called the time profile, and the profile in which the depth is expressed in meters is called the depth profile. The structure diagram made with time section is called isotime structure diagram, professionally, isotime structure diagram is called iso-t0 structure diagram. The structural map made with the depth profile is called the isobathic structural map. No matter which section is used to make the structural diagram, th...

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Problems solved by technology

[0005] The main purpose of the embodiments of the present invention is to provide a device for establishing a petroleum seismic tectonic map to solve the problem in the prior art between the contours of the seismic tectonic map established under the condition of irregular inner and outer boundaries or any equivalence interval. The problem of precision loss caused by easy intersection

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