Seismic data processing method and formation quality factor estimation method and device

A technology of formation quality factor and seismic data, applied in seismic signal processing, seismology, measuring devices, etc.

Active Publication Date: 2019-04-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] The object of the present invention is to provide a seismic data processing method, a formation quality factor estimation method and a device, which are used to solve th...

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  • Seismic data processing method and formation quality factor estimation method and device
  • Seismic data processing method and formation quality factor estimation method and device
  • Seismic data processing method and formation quality factor estimation method and device

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Embodiment Construction

[0038] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0039] An embodiment of a method for processing seismic data of the present invention proposes a method for processing seismic data that does not depend on surface survey information and high-precision inverse Q filtering of VSP data constraints, and restores seismic amplitude information through the following specific steps:

[0040] 1. Obtain pre-stack gather data and superimposed pure wave data volume.

[0041] 1.1 Perform static correction processing on the seismic data in the target area to solve the problem of static correction of seismic data; use spherical diffusion compensation to compensate the lost energy of spherical diffusion of seismic data in the time direction after static correction processing; use pre-stack noise attenuation method to reduce The abnormal amplitude in the seismic data improves the signal-to-noise ratio of th...

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Abstract

The invention relates to a seismic data processing method and a formation quality factor estimation method and device. Initial seismic data are subjected to static correction, spherical diffusion compensation, pre-stack noise attenuation and surface consistence amplitude compensation treatment, seismic wavelets are extracted from the stacked data through a high-order statistic method, and an initial quality factor is obtained through an amplitude ratio method; then interference, sorted into the main measuring line direction and the connecting line direction, of the initial quality factor is removed through a high-density property filter method, and finally the optimized quality factor is obtained; and inverse Q filter is carried out through the quality factor, and the final processed seismic data are obtained. An accurate quality factor Q value can be obtained according to the existing seismic data under lack of surface layer survey information and VSP data, inverse Q filter treatmentis carried out, seismic data amplitude information is recovered, the seismic data subjected to inverse Q filter treatment keep reality and the amplitude, and the reliable basis is provided for seismic inversion.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration seismic data processing, and in particular relates to a seismic data processing method, a formation quality factor estimation method and a device. Background technique [0002] In seismic data, seismic waves will experience energy attenuation and velocity dispersion when propagating in an incompletely elastic subsurface medium. Energy attenuation makes the energy of seismic waves weak in deep formations, which affects the signal-to-noise ratio and resolution of seismic data. Inverse Q filtering is an effective method to compensate for ground absorption. It can compensate for amplitude attenuation and frequency loss of seismic waves, enhance the energy of weak reflection waves, and improve the signal-to-noise ratio and resolution of seismic data. [0003] The Chinese patent with the publication number 106646601 discloses a method for establishing a three-dimensional Q value of shallo...

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/36G01V1/362G01V1/368G01V2210/324G01V2210/53
Inventor 符瑞祥蔡其新孟凡冰汪功怀李传强高爱荣姜惠刚武俊红
Owner CHINA PETROLEUM & CHEM CORP
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