3D resistivity cascaded automatic imaging method

An imaging method and resistivity technology, applied in the field of geophysical exploration, can solve problems such as the inability of computer memory and speed to meet production requirements, wrong geological understanding, and the inability of accurate simulation to be practical, so as to increase objectivity, save time, improve The effect of calculating speed

Active Publication Date: 2007-08-01
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0002] The development of traditional magnetotelluric prospecting data processing and imaging technology has gone through several stages. At first, it could only make some qualitative explanations. According to the bathymetry curve, the general uplift and depression pattern of the basin was understood. Later, a one-dimensional and semi-quantitative inversion of Bostic (BOSTIC for short) inversion method can understand the general change of longitudinal electrical properties, and later developed one-dimensional layered medium inversion and one-dimensional continuous medium inversion, etc., the layering accuracy has been improved, but the initial model needs to be input, and the inversion There are equivalence and multi-solutions in the inversion, especially in the case of non-layered ground, the inversion results may even lead to erroneous geological understanding

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[0016] The present invention performs BOSTIC inversion according to the average curve of measured apparent resistivity and phase. After inversion, the frequency-resistivity relationship of each measured curve becomes the depth-resistivity relationship. It is said that the layers of the inversion are consistent but the inversion depth may be different. At this time, it is necessary to establish a layered model for the exploration area according to the minimum inversion depth. The method is three-dimensional interpolation, so what is obtained is the initial resistivity imaging result of the exploration area, and at the same time According to this planar grid, three-dimensional interpolation is performed on the apparent resistivity and phase in two directions in the frequency domain, and the bathymetry curves in two directions corresponding to the model are obtained, and the first imaging and interpolation are completed. Due to the BOSTIC inversion and FFT The interpolation has th...

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Abstract

This invention relates to earth physical exploring technique, which is of large earth electrical magnetic exploring data 3D resistance automatic imaging method, which comprises the following steps: using regular electrical magnetic exploring method to test and record area data; adopting the exploring two electrodes direction resistance rate and phase curve for insert value and induce with each image result as next reduce base near to aim object structure imaging.

Description

technical field [0001] The invention relates to geophysical prospecting technology, and relates to a three-dimensional resistivity cascade automatic imaging method for processing magnetotelluric prospecting data. Background technique [0002] The development of traditional magnetotelluric prospecting data processing and imaging technology has gone through several stages. At first, it could only make some qualitative explanations. According to the bathymetry curve, the general uplift and depression pattern of the basin was understood. Later, a one-dimensional and semi-quantitative inversion of Bostic (BOSTIC for short) inversion method can understand the general change of longitudinal electrical properties, and later developed one-dimensional layered medium inversion and one-dimensional continuous medium inversion, etc., the layering accuracy has been improved, but the initial model needs to be input, and the inversion There are equivalence and multi-solutions in the inversio...

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Application Information

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IPC IPC(8): G01V3/38
Inventor 何展翔王永涛
Owner BC P INC CHINA NAT PETROLEUM CORP
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