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Seismic wave transmission attenuation compensation method and device

An attenuation compensation, seismic wave technology, applied in seismic signal processing, seismology for logging records, etc., can solve problems such as the uncertainty of compensation results

Active Publication Date: 2015-02-25
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

More importantly, the above method is only an estimated energy compensation based on mathematical statistics, not the compensation value obtained according to the real law of formation transmission attenuation, so the compensation results have great uncertainty

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  • Seismic wave transmission attenuation compensation method and device
  • Seismic wave transmission attenuation compensation method and device
  • Seismic wave transmission attenuation compensation method and device

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[0035] 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.

[0036] The data to be processed in this application may include seismic data obtained by vertical seismic (VSP) observation. In the vertical seismic observation mode, the geophone can be deep underground to acquire seismic data. This method has the characteristics of less external interference, relatively reliable time-depth relationship...

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Abstract

The invention provides a seismic wave transmission attenuation compensation method and device. The method comprises the first step of obtaining vertical component data of vertical seismic data, the second step of obtaining the interval velocity of the vertical seismic data based on first arrival of longitudinal waves, the third step of conducting normalization processing on the vertical component data to obtain a total energy attenuation coefficient sequence, the fourth step of converting the vertical component data in a time domain into seismic data in a depth domain, the fifth step of obtaining a spherical diffusion attenuation coefficient sequence and a stratum absorption attenuation coefficient sequence of the seismic data in the depth domain, and the sixth step of using a result obtained by dividing a total energy attenuation coefficient by the product of the spherical diffusion attenuation coefficient sequence and the stratum absorption attenuation coefficient sequence as a stratum transmission coefficient, obtaining energy compensation for seismic wave transmission attenuation according to the stratum transmission coefficient and conducting transmission attenuation compensation on the seismic data. Through utilization of all embodiments involved in the method, effective and reliable energy compensation for stratum transmission attenuation can be obtained, and the stratum transmission coefficient is used for amplitude recovery processing on the seismic data.

Description

technical field [0001] The application belongs to the field of seismic data processing in geophysical exploration, and in particular relates to a compensation method and device for seismic wave transmission attenuation. Background technique [0002] As seismic waves propagate through the formation, their energy gradually weakens. Under most geological conditions, the factors affecting seismic wave energy attenuation mainly include spherical diffusion attenuation of seismic wave, formation absorption attenuation and transmission attenuation. These attenuations will affect the recovery of seismic wave energy in subsequent data processing, which is of great significance to the study of reservoir properties. [0003] One or several strong wave impedance layers often appear in the stratigraphic sequence in some areas, which will cause serious seismic wave transmission attenuation, making the effective seismic wave under the layer weaker, for example, the high-speed wave of igneo...

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Application Information

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IPC IPC(8): G01V1/50G01V1/48
Inventor 蔡志东张庆红鲍磊英彭继新
Owner BC P INC CHINA NAT PETROLEUM CORP
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