First Arrival Homing Method and System Based on Sample Attribute Segment

A sample attribute and sample point technology, which is applied in the field of petroleum seismic exploration data processing, can solve problems such as large amount of calculation and mispicking, and achieve reliable results and meet the needs of normal production

Active Publication Date: 2021-12-31
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This method has a large amount of calculation in the application, and because the Hilbert transform can display the phase regardless of the energy strength, even the weak amplitude can also be displayed in the phase diagram, and such a weak amplitude is probably not the actual first arrival peaks and troughs, so it will cause mispicking of the first arrival

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  • First Arrival Homing Method and System Based on Sample Attribute Segment
  • First Arrival Homing Method and System Based on Sample Attribute Segment
  • First Arrival Homing Method and System Based on Sample Attribute Segment

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Embodiment Construction

[0045] In the embodiment of the present invention, the first-arrival homing operation is performed through the information in the sample attribute segment. When calculating the sample attribute segment, first determine the sequence number corresponding to at least one of the current sample point, the start sample point or the end sample point, and the sequence number refers to the sequence number in the seismic trace.

[0046] When the sequence number corresponding to the current sample point is determined; you can start from the current sample point and look up the amplitude value of each sample point. When the amplitude value changes from positive to negative, or from negative to positive, the sample point where the sign changes The serial number is the serial number corresponding to the start sample point; when obtaining the serial number corresponding to the end sample point, start from the current sample point, and check the amplitude value of each sample point downward, w...

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Abstract

The present invention provides a first-arrival homing method based on sample attribute segments and a system thereof, the method comprising: finding the first-arrival point and calculating the sample attribute segment where the first-arrival point is located, which is recorded as the first-arrival sample attribute segment; An upper-wave sample attribute segment and a lower-wave sample attribute segment above and below the first-arrival sample attribute segment; judging whether the first distance between the upper-wave sample attribute segment and the first-arrival point is greater than the lower-wave The second distance between the sample attribute segment and the first arrival point; if yes, return the first arrival point to the down wave sample attribute segment. The technical principle of the present invention is simple, easy to implement, fast in calculation speed, strong in anti-weak signal interference ability, can quickly determine the first arrival position, and provides guarantee for seismic data processing personnel to obtain accurate first arrival position.

Description

technical field [0001] The invention relates to the technical field of petroleum seismic exploration data processing, in particular to a first-arrival homing method and system based on sample attribute segments. Background technique [0002] The existing automatic first-arrival picking methods are generally based on energy ratio, information entropy and other means. These methods calculate the first-arrival position. This position is near the first-arrival position, but it is not the first-arrival point required by the processing personnel. In actual production, , the first arrival is at the peak or trough of the amplitude. In order to solve this problem, the commonly used first arrival homing technology generally uses the phase tracking technology based on Hilbert transform to determine the peak and valley positions of the first arrival. [0003] This technique obtains the Hilbert transform of seismic trace data x(t) by performing Hilbert transform on seismic data: [000...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 朱海伟段文超陈金焕
Owner CHINA PETROLEUM & CHEM CORP
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