Compensation direction filtering method of two-dimensional grid data

A technology of direction filtering and two-dimensional grid, which is applied in the field of digital filtering and compensation direction filtering of two-dimensional grid data. Noise data and other problems, to achieve the effect of strong directionality of filtering
CN103513288AActive Publication Date: 2014-01-15BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2014-01-15

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Abstract

The present invention relates to a gravity and magnetic force exploration data processing technique in geophysical exploration, and is a compensation direction filtering method for two-dimensional grid data. Gridding processing is performed on original data. Azimuth and node distribution in each window which corresponds with each orientation are divided in each window. The node coefficient in background field filtering and the node coefficient in calculating a residual field compensation filtering on each orientation are set. The background field value of the filtering orientation in each window is calculated. Cyclic iteration is performed for finishing compensation direction filtering. The compensation direction filtering method of the two-dimensional grid data has high filtering directivity and satisfies the required for extracting direction abnormity information in heavy magnetic processing, and simultaneously can satisfy the requirement for restraining abnormity information in a certain direction. The compensation direction filtering method for the two-dimensional grid data leads to progress in heavy magnetic exploration data processing and interpreting technique, and simultaneously provides a new method for processing directional filtering of the two-dimensional grid data in other subjects.
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Description

technical field

[0001] The invention relates to the field of gravity and magnetic prospecting data processing in geophysical prospecting, belongs to digital filtering technology, and is a compensation direction filtering method for two-dimensional grid data. Background technique

[0002] In the acquisition of magnetic (including aeromagnetic) data, the linear anomalies along the line caused by reasons such as consistency differences between survey lines have directions, and these directional anomalies are the interference of geological research (that is, data noise). Therefore, in In the processing and interpretation of gravity and magnetic exploration data, it is necessary to extract directional anomaly information to meet the needs of interpreting faults and structures. It needs to be processed before data processing and interpretation, that is, the directional filtering method is used to suppress the directional gravity and magnetic noise in the gravity and magnetic data. ...

Claims

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