Gravity and magnetic potential field analytic continuation method based on spatial domain

A technology of space domain and potential field, which is applied in the measurement of gravitational field, electric/magnetic exploration, re-radiation of sound waves, etc., can solve problems such as the inapplicability of analytical continuation method, and achieve the effect of solving the problem of singularity

Active Publication Date: 2019-10-29
SECOND INST OF OCEANOGRAPHY MNR
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Problems solved by technology

[0004] In order to solve the inapplicability of the traditional analytic continuation method in genera

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  • Gravity and magnetic potential field analytic continuation method based on spatial domain
  • Gravity and magnetic potential field analytic continuation method based on spatial domain
  • Gravity and magnetic potential field analytic continuation method based on spatial domain

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Embodiment Construction

[0044] The feasibility of the present invention will be further described in detail below in conjunction with the examples. The following examples are the results of explaining the present invention and the present invention is not limited to the following examples.

[0045] The present invention provides an analytic continuation method based on the space domain, which can realize the upward continuation from the plane to the plane, the upward continuation from the plane to the curved surface, the downward continuation from the plane to the plane, and the continuation from the curved surface to the plane. Downward continuation and continuation between two surfaces outside the field source;

[0046] (1) Upward continuation, including the following steps:

[0047] (a) The observation surface S(x,y) is a plane, and its elevation is z 0 is a constant, and the gravitational or magnetic anomaly (hereinafter referred to as the potential field) observed on S(x,y) is denoted as U(α,β,...

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Abstract

The invention discloses a gravity and magnetic potential field analytic continuation method based on the spatial domain. The gravity and magnetic potential field refers to a gravity field or a magnetic field. The analytic continuation refers to a method of calculating the gravity field or magnetic field on other curved surfaces (including flat surfaces) by the gravity field or magnetic field on anobservation surface. The solution to the analytic continuation has two ideas including the spatial domain and the frequency domain. The analytic continuation method is a novel method for the spatialdomain, can directly continue the magnetic anomaly data of aeromagnetic measurement down to a ground enhanced magnetic anomaly signal, and can also continue the ground observation data up to a highersurface to highlight a deep field feature. The method can continue the abnormal data observed by any curved surface to another arbitrary curved surface, breaks through the limitation that the continuation surface in the frequency domain method must be a flat surface, and solves the singular point problem in the spatial domain analytical continuation method.

Description

technical field [0001] The invention belongs to the technical field of gravity and magnetic anomaly data processing, and relates to an analytic continuation method for gravity and magnetic potential fields based on space domain. Background technique [0002] Gravity and magnetic exploration methods carry out gravity field or magnetic field observations on the ground, air, sea surface and seabed, and then correct the original data to obtain gravity anomalies or magnetic anomalies, which reflect the density and magnetic inhomogeneity below the observation surface, so that they can be applied to Geological mapping, mineral exploration, pipeline detection, etc. The two methods of gravity prospecting and magnetic prospecting have certain similarities, so gravity anomalies and magnetic anomalies are usually discussed together, called gravity and magnetic anomalies. Both gravitational field and magnetic field are potential fields, so they are also called gravitational magnetic pot...

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Application Information

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IPC IPC(8): G01V11/00G01V3/38G01V7/06
CPCG01V3/38G01V7/06G01V11/00
Inventor 郭志馗陶春辉
Owner SECOND INST OF OCEANOGRAPHY MNR
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