Fast forward modeling method and device for two-dimensional magnetic anomaly based on nufft

Abstract

The present application relates to a NUFFT-based two-dimensional magnetic anomaly fast forward modeling method, device, computer equipment and storage medium. In this application, through the main steps of complex magnetic body model representation, magnetization calculation, wave number domain magnetic potential formula derivation, one-dimensional shape function integration, non-uniform wave number selection, wave number domain magnetic anomaly field calculation, space domain magnetic anomaly field calculation and other main steps, using non- Uniform Fast Fourier Transform and shape function integration realize efficient and high-precision forward modeling of two-dimensional magnetic anomaly field. In this application, making full use of the flexibility of the non-uniform fast Fourier transform and the high-precision advantages based on the quadratic interpolation shape function integration, it solves the problem that the forward modeling of magnetic anomalies in the wave number domain is limited to regular uniform grids, and the numerical simulation cannot be performed simultaneously. Take into account the problem of calculation accuracy and efficiency.

Description

technical field [0001] The present application relates to the technical field of two-dimensional magnetic anomaly numerical simulation, in particular to a NUFFT-based two-dimensional magnetic anomaly fast forward modeling method, device, computer equipment and storage medium. Background technique [0002] Magnetic prospecting is a very classic geophysical prospecting method, which has been widely used in solid mineral prospecting, general survey of oil and gas structures, hydrological engineering geology and many other aspects, especially in mineral prospecting by using magnetic method to directly search for magnetite and its symbiotic Magnetic minerals are essential. With the increase of exploration depth and difficulty, realizing high-efficiency and high-precision magnetic exploration has become the focus of research. Therefore, efficient and high-precision forward modeling of magnetic anomaly fields under complex conditions plays an important role in magnetic anomaly inv...

AI Technical Summary

Problems solved by technology

[0004] Therefore, when the traditional fast Fourier transform edge expansion method is applied to the forward modeling of magnetic anomalies in the wavenumber domain, it can only sample uniformly in the space domain and the wavenumber domain, and is limited to regular uniform grids, which has the problem of not being able to balance calculation accuracy and efficiency

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