A method and device for gravity anomaly boundary enhancement

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, low extraction accuracy of abnormal geological boundary, weak boundary identification ability, etc., to avoid the effect of amplification.

CN105891889BActive Publication Date: 2018-05-04BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-05-04

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Abstract

Embodiments of the present application provide a method and device for enhancing gravity anomaly boundaries. The method includes: obtaining the gravity anomaly data of the target work area, and gridding the gravity anomaly data; using a space domain operator to extract the gravity anomaly boundary extremum information of the first grid point in a preset direction one by one; based on The gravity anomaly boundary extremum information of the first grid point is used to calculate the coherence enhancement value of the second grid point. The gravity anomaly boundary enhancement method provided by this application performs spatial domain processing on the gravity anomaly data, avoids the amplification effect of the traditional frequency domain algorithm on data noise, and can obtain clear and continuous gravity anomaly boundary information.
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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...

Examples

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...