Numerical simulation method for three-dimensional direct current resistivity method

Abstract

The invention discloses a numerical simulation method for a three-dimensional direct current resistivity method, which comprises the following steps of: setting direct current method exploration area and background resistivity parameters, three-dimensional anomalous body distribution range and resistivity parameters, calculating current density, performing two-dimensional discrete Fourier transform, calculating wave number domain abnormal potential, performing two-dimensional inverse Fourier transform, performing iterative convergence judgment and the like. And efficient and high-precision numerical simulation of three-dimensional direct current electric method exploration is realized. The problem that fine inversion of large-scale direct-current electric method data cannot be met due to the fact that the data size is large, the storage requirement is high and the calculation time is slow when a large-scale model is calculated in current direct-current electric method exploration numerical simulation is solved, and fine inversion and explanation of direct-current electric method measured data under field complex terrains or underground complex structures can be achieved.

Description

technical field [0001] The invention relates to the technical field of numerical simulation, in particular to a three-dimensional DC resistivity numerical simulation method. Background technique [0002] As one of the basic methods of geophysical exploration, DC resistivity method is widely used in mineral resources exploration, engineering environment exploration, archaeology, deep sea exploration etc. With the increasing depth and difficulty of field exploration, the realization of reliable, efficient, and high-precision DC resistivity exploration under complex terrain and geological structure conditions has become the focus of research. Forward modeling is the basis of inversion, and the calculation accuracy and efficiency of forward modeling determine the efficiency and accuracy of DC resistivity method exploration and inversion. [0003] In the current numerical simulation method of DC resistivity method, in order to obtain higher calculation accuracy under complex co...

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Problems solved by technology

[0004] In order to solve the problem that conventional methods cannot take into account both calculation accuracy and calculation efficiency when numerically simulating complex models, and cannot satisfy the problem of fine inversion and imaging of large-scale measured data by DC resistivity method, the present invention provides a three-dimensional DC resistivity method numerical simulation method, It is helpful to realize the fine inversion and interpretation of the measured data of direct current method under complex terrain or underground complex results in the field

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