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Method and device for obtaining residual gravity anomaly

A technology of gravity anomaly and Bouguer gravity, which is applied in the field of geological surveying and mapping, can solve the problems of residual gravity extraction error, etc., and achieve the effect of accurate, high precision, accuracy and accurate prediction of residual gravity anomaly

Active Publication Date: 2018-05-08
北京中科地物能源技术有限公司
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Problems solved by technology

[0005] In view of this, the present invention provides a method and device for obtaining gravity anomalies, which can solve the problem of residual gravity extraction errors existing in the prior art, and avoid the influence of errors on subsequent prediction results of geological bodies

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  • Method and device for obtaining residual gravity anomaly
  • Method and device for obtaining residual gravity anomaly
  • Method and device for obtaining residual gravity anomaly

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Embodiment Construction

[0068] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0069] For ease of understanding, a number of technical terms involved in the embodiments of the present invention are firstly introduced.

[0070] The Bouguer gravity anomaly refers to the gravity value obtained from the observation results of the gravimeter after necessary processing such as latitude correction, height correction, intermediate ...

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Abstract

The embodiments of the invention disclose a method and a device for obtaining residual gravity anomaly. The method includes the following steps: obtaining the Bouguer gravity anomaly of a target region; determining a first preset range corresponding to each sampling point in the target region; obtaining a first regional field value of each sampling point in the first preset range through a surfacefitting method based on the coordinate and field value of the sampling point; traversing the target region, and obtaining first regional gravity anomaly of the target region according to the first regional field values of the sampling points in the target region; and obtaining first residual gravity anomaly of the target region according to the Bouguer gravity anomaly and the first regional gravity anomaly. According to the embodiments of the invention, the regional field values of the sampling points obtained by using the local surface fitting method are more precise and accurate, the regional gravity anomaly of the target region is more consistent with the actual situation, the residual gravity anomaly obtained according to the Bouguer gravity anomaly and the regional gravity anomaly ismore accurate, and therefore, an underground geological body can be predicted accurately.

Description

technical field [0001] The invention relates to the technical field of geological surveying and mapping, in particular to a method and device for obtaining residual gravity anomalies. Background technique [0002] In geological exploration, the observed gravity field is generally used to predict underground geological bodies. The actually observed gravity field, that is, the Bouguer gravity anomaly, can be decomposed into three parts: the far-source area and the near-source area. and the target layer section. The far-source region refers to the region far away from the target layer, and the gravitational field generated by its material density (that is, the part of the far-source region) generally changes gently and linearly in the observation region. The near-source area refers to the area close to the target layer. Since it is close to the target layer, the gravity field generated by its material density (that is, the near-source area) will be entangled with the target la...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/00
CPCG01V7/00G01V7/06
Inventor 王真理
Owner 北京中科地物能源技术有限公司
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