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Seismic coherent data volume processing method and device

A coherent data and seismic technology, applied in seismic signal processing, seismology, measuring devices, etc., can solve the problems of large noise in seismic coherent volume data, failure to guarantee fault resolution, identification ability and interpretation accuracy, etc., and achieve improved resolution Effect

Active Publication Date: 2020-11-13
PETROCHINA CO LTD
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Problems solved by technology

The existing technology usually adopts the method of improving the coherence algorithm or optimizing the original seismic data to overcome the above problems, but there is still a lot of noise in the finally obtained seismic coherent volume data, which cannot guarantee the resolution, identification ability and interpretation accuracy of faults

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  • Seismic coherent data volume processing method and device
  • Seismic coherent data volume processing method and device
  • Seismic coherent data volume processing method and device

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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0024] As mentioned above, in seismic coherence volume data, in addition to faults having low coherence characteristics, changes in stratum or lithology, high-dip formations, and seismic data with low signal-to-noise ratios can also produce similar low coherence values. This part of the data is equivalent to noise, which coexists with the low-coherence data generated by the fault on the coherence profile and time slice, and partially superimposed together to cover up the fault characteristics. The existing technology usually adopts methods of improving the coherence a...

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Abstract

The invention discloses a seismic coherent data volume processing method and device. The method comprises the steps of: obtaining a seismic coherent data volume, and rearranging the seismic coherent data to obtain the seismic coherent data corresponding to each moment; performing wave number domain transformation on the seismic coherent data corresponding to each moment along the direction of theseismic survey line, and performing high-pass filtering on the transformation result; and carrying out wave number domain inverse transformation on the filtered seismic coherent data along the direction of the seismic survey line to obtain a seismic coherent data volume processing result. According to the method, noise generated by stratum or lithology changes, high-inclination-angle strata and low-signal-to-noise-ratio seismic data in the seismic coherent data volume can be effectively suppressed, the denoised seismic coherent data volume has obvious fault characteristics, and the resolutionratio, the recognition capability and the interpretation precision of faults are improved.

Description

technical field [0001] The invention relates to the technical field of petroleum geophysical exploration seismic data processing, in particular to a method and device for processing seismic coherent data volumes. Background technique [0002] A fault is a structure in which the crustal rock layer is ruptured due to the force reaching a certain strength, and there is obvious relative movement along the rupture surface. Oil and gas resources are mostly distributed in faults. Faults are not only the boundaries of oil and gas reservoirs, but also the channels for the migration and accumulation of oil and gas resources. Therefore, the identification and interpretation of faults are very important tasks in oil and gas exploration and development. In the process of oil and gas exploration and development, it is often necessary to carry out relevant research on the distribution characteristics of faults in the target interval, to clarify the damage or accumulation of faults to the ...

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Application Information

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IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/306G01V1/28
Inventor 戴晓峰
Owner PETROCHINA CO LTD
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