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Time-saving interlayer multiple prediction method and suppression method
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A technology of interlayer multiple waves and prediction methods, which is applied in the field of marine and land geophysical exploration, can solve the problems of incomputable, large amount of calculation, and high data requirements, so as to maintain accuracy and effectiveness, save calculation time, improve Computational Efficiency Effects
Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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However, this method has high data requirements and a huge amount of calculation, which cannot be calculated in actual 3D seismic processing.
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Embodiment 1
[0066] Based on the above idea, this embodiment proposes a time-saving interlayer multiple wave prediction method. Such as figure 2 As shown, the method proposes:
[0067] S100. Perform preprocessing on the seismic data in the target area; the preprocessing includes, for example, noise reduction processing.
[0068] S300, establishing an initial underground geological model of the target area, and setting a constraint angle according to the initial underground geological model, and then determining a circumferential frequency range corresponding to the constraint angle; this step is specifically divided into the following steps:
[0069] Determine the initial velocity model of the target area according to the logging data;
[0070] performing time migration on the preprocessed seismic data according to the initial velocity model to obtain an initial underground geological model;
[0071] According to the initial underground geological model, the constraint angle (α min ≤α...
Embodiment 2
[0082] In practical applications, especially in marine and land seismic exploration, due to the existence of strong reflection interfaces underground, seismic waves are reflected multiple times between strong reflection interfaces to form interlayer multiple waves. The resolution of seismic data increases the difficulty of identifying effective waves, and affects the quality of seismic imaging and the authenticity and reliability of seismic interpretation. Aiming at the problem of suppressing interlayer multiple waves in seismic data, especially in the target area, the present invention also proposes a method for suppressing interlayer multiple waves based on the above prediction method.
[0083] In this embodiment, the method for suppressing interlayer multiple waves mainly includes the following steps:
[0084] Using the time-saving interlayer multiple wave prediction method described in Embodiment 1, the interlayer multiple wave prediction result of the target area is obtai...
Embodiment 3
[0089] In addition, in order to solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention also provides a storage medium correspondingly, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned time-saving inter-layer multiple The steps of the wave prediction method.
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Abstract
The invention discloses a time-saving inter-layer multiple prediction method and a time-saving inter-layer multiple suppression method. The time-saving inter-layer multiple prediction method comprises the steps of preprocessing seismic data of a target area; establishing an initial underground geologic model of a target area, setting a constraint angle according to the initial underground geologic model, and further determining a circumferential frequency range corresponding to the constraint angle; within the circumferential frequency range, performing Fourier transform on the preprocessed seismic data of the target area, and performing background medium velocity migration on the seismic data subjected to Fourier transform to obtain pseudo depth domain data of the target area; and substituting the pseudo depth domain data of the target area into an inverse scattering series method interlayer multiple prediction formula to carry out interlayer multiple prediction, and carrying out inverse Fourier transform on an obtained interlayer multiple prediction result to obtain a time-space domain interlayer multiple prediction result of the target area.
Description
technical field [0001] The invention relates to the technical field of marine and terrestrial geophysical exploration, in particular to a time-saving interlayer multiple wave prediction method and suppression method in seismic data processing, as well as corresponding storage media and computer equipment. Background technique [0002] In seismic exploration, due to the existence of underground strong reflection interfaces, seismic waves are reflected multiple times between underground strong reflection interfaces to form interlayer multiples. Therefore, interlayer multiples widely exist in seismic data, and they are superimposed with primary reflections. Interference reduces the resolution of seismic data, increases the difficulty of identifying effective waves, and affects the quality of seismic imaging and the authenticity and reliability of seismic interpretation. In order to eliminate or suppress the interference of interlayer multiple waves, improve data resolution and ...
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