Synthetic seismogram method and synthetic seismogram device

A technology for synthesizing seismic records and seismic waves, which is applied in the field of seismic exploration and can solve the problems of inability to achieve thin layer thickness viscoelastic parameters, conventional convolution model theory is no longer applicable, and conventional inversion methods cannot be applied.

Active Publication Date: 2017-05-31
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0004] However, when the reflection coefficient changes frequently, the conventional convolution model theory is no longer applicable, which directly leads to the

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  • Synthetic seismogram method and synthetic seismogram device
  • Synthetic seismogram method and synthetic seismogram device
  • Synthetic seismogram method and synthetic seismogram device

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[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making...

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Abstract

The invention provides a synthetic seismogram method and a synthetic seismogram device, and relates to the field of seismic exploration. The method comprises the following steps: getting the stratum model, seismic wave frequency and seismic wavelet of a target work area, wherein the stratum model includes at least one type of interface, and there is at least one interface of each type; calculating the reflection coefficient of each stratum according to the stratum model and the seismic wave frequency, and getting a reflection coefficient matrix containing frequency-dependent reflection coefficients; calculating the synthetic seismogram spectrum of each moment according to the reflection coefficient matrix and the seismic wavelet; and carrying out Fourier inverse transform on the synthetic seismogram spectrum to get a synthetic seismogram of all moments. Both a conventional wave impedance interface of which the media on both sides are homogeneous isotropic media and a special interface of which the media on both sides are homogeneous anisotropic media can be calculated. A synthetic seismogram method applicable to unconventional oil and gas reservoirs such as thin or viscoelastic reservoirs is provided. A geological assurance is provided for accurate exploration and efficient development of oil and gas resources.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a method and device for synthesizing seismic records. Background technique [0002] Seismic records synthesized by convolution models play a very important role in seismic pre-stack and post-stack inversion. Conventional seismic pre-stack AVO inversion or post-stack wave impedance inversion are model-based inversions, the basis of which is to calculate seismic records through theoretical models, and this process is generally realized through convolution models. The convolution model assumes that the reflected wave amplitude is the result of convolution of the reflection coefficient with the wavelet. In a seismic record, the amplitude at each moment is formed by the interaction of many reflection coefficients and the convolution results of wavelets. The conventional convolution model is generally aimed at the wave impedance interface, and its reflection coefficient i...

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 卢勇旭彭苏萍崔晓芹杜文凤
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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