Seismic wave velocity parameter determination method, device and equipment based on DEM model

A seismic wave and velocity technology, applied in seismology, measuring devices, seismic signal processing, etc., to achieve accurate calculations

Pending Publication Date: 2021-06-22
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] The purpose of the embodiment of this specification is to provide a method, device and equipment for determining seismic wave velocity parameters based on a DEM model, so as to solve the problem of how to accurately calculate the seismic wave velocity dispersion and attenuation

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  • Seismic wave velocity parameter determination method, device and equipment based on DEM model
  • Seismic wave velocity parameter determination method, device and equipment based on DEM model
  • Seismic wave velocity parameter determination method, device and equipment based on DEM model

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Embodiment Construction

[0040]The following will clearly and completely describe the technical solutions in the embodiments of the present specification in combination with the drawings in the embodiments of the present specification. Obviously, the described embodiments are only some of the embodiments of the present specification, not all of them. Based on the embodiments in this specification, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0041] In order to solve the above technical problems, the embodiment of this specification proposes a method for determining seismic wave velocity parameters based on a DEM model. The executor of the method for determining seismic wave velocity parameters based on a DEM model is the equipment for determining seismic wave velocity parameters based on a DEM model. Such as figure 1 As shown, the method for determining seismic wave velocity parameters b...

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Abstract

The embodiment of the invention provides a seismic wave velocity parameter determination method, device and equipment based on DEM model. The method comprises the following steps: acquiring actually measured bulk moduli and actually measured shear moduli of a rock sample under at least two different pressures; calculating a high-pressure modulus by using the actually measured bulk modulus and the actually measured shear modulus; based on the relationship between the modulus and the fracture density under a DEM model, determining the accumulated fracture density corresponding to the rock sample through the high-pressure modulus; calculating micro-fracture porosity distribution spectrums under the at least two different pressures according to the accumulated fracture density; determining seismic wave speed parameters corresponding to the rock sample by combining pore structure parameters of the rock sample and the micro-fracture porosity distribution spectrum, wherein the seismic wave velocity parameters comprise velocity dispersion and attenuation. According to the method, accurate calculation of seismic wave speed dispersion and attenuation in microcosmic pore structure dominated geology is realized, and production and development in practical application are facilitated.

Description

technical field [0001] The embodiments of this specification relate to the technical field of geological exploration and development, and in particular to a method, device and equipment for determining seismic wave velocity parameters based on a DEM model. Background technique [0002] In the field of oil and gas exploration and development, the rock physical properties and other seismic response parameters can be determined by obtaining the elastic wave parameters of the reservoir rock. The key theoretical basis is established, which can be used to solve the calibration problem of joint application of geophysical data in different frequency bands. [0003] Velocity dispersion generally refers to the phenomenon that the velocity and frequency of seismic waves change in the actual formation, and correspondingly, it is often accompanied by the feature that the amplitude decreases with the increase of distance, that is, the attenuation of seismic waves. When seismic waves indu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/307G01V1/303
Inventor 赵建国闫秀懿欧阳芳赵皓李智肖增佳
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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