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Gravity abnormal boundary enhancement method and device

A gravity anomaly and boundary technology, applied in the field of geophysical exploration, can solve the problems of poor directionality and continuity of derivative extreme value, weak boundary recognition ability, and low precision of abnormal geological boundary extraction, so as to avoid the effect of amplification

Active Publication Date: 2016-08-24
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0004] Derivative algorithms are generally carried out by Fourier transform in the frequency domain. Therefore, derivative algorithms tend to amplify the noise of the original data, and the directionality and continuity of the derivative extremum are poor, and the boundary recognition ability for weak anomalies is poor. Weak, resulting in low extraction accuracy for abnormal geological boundaries

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  • Gravity abnormal boundary enhancement method and device
  • Gravity abnormal boundary enhancement method and device
  • Gravity abnormal boundary enhancement method and device

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Embodiment Construction

[0059] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0060] The method for strengthening the gravity anomaly boundary described in this application will be described in detail below with reference to the accompanying drawings. figure 1 It is a schematic flow chart of an embodiment of the gravity anomaly boundary enhancement method provided by this application. Although the present applicat...

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Abstract

The embodiment of the invention provides a gravity abnormal boundary enhancement method and device. The method comprises the steps of: obtaining gravity abnormal data of a target work area, and meshing the gravity abnormal data; adopting a space domain operator to extract the gravity abnormal boundary extremum information of a first grid mesh point in a preset direction one by one; and based on the abnormal boundary extremum information of the first mesh point, calculating a coherent enhancement value of a second mesh point. According to the invention, space domain processing is carried out on the gravity abnormal data, the amplification effect of a conventional frequency domain algorithm on data noise is avoided, and the clear and continuous gravity abnormal boundary information can be obtained.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration in oil and solid mineral exploration, in particular to a method and device for enhancing gravity anomaly boundaries. Background technique [0002] In the field of geophysical exploration technology, the distribution of geological field sources can be understood through gravity exploration, including the shape and scale of field sources. Gravity anomaly is a comprehensive response to the uneven distribution of subsurface density bodies. The abnormal geological boundary, such as the location of stratum fractures, can be identified by using the information data such as the linear step zone of the abnormal edge, abnormal distortion, and abnormal zoning characteristics in the gravity anomaly data. However, the information related to geological boundaries usually shows high frequency and low amplitude, and it is often difficult to directly extract the horizontal position of geological bo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36G06K9/46
CPCG01V1/364G01V2210/324G06V10/443
Inventor 赵文举刘云祥赵荔
Owner BC P INC CHINA NAT PETROLEUM CORP
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