Full-band elastic wave dispersion attenuation analysis method for cross-shaped multi-scale flow pore medium

A technology for porous media and analysis methods, applied in the field of full-frequency elastic wave dispersion and attenuation analysis of cross-shaped multi-scale flow porous media, can solve problems such as not attracting too much attention, and achieve the effect of simple implementation method and good applicability

Pending Publication Date: 2020-08-28
EAST CHINA UNIV OF TECH
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Problems solved by technology

In 2004, Nicholas Chotiros proposed the BICSQS model based on the BISQ model considering particle shear drag, but did not attract much attention

Method used

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  • Full-band elastic wave dispersion attenuation analysis method for cross-shaped multi-scale flow pore medium
  • Full-band elastic wave dispersion attenuation analysis method for cross-shaped multi-scale flow pore medium
  • Full-band elastic wave dispersion attenuation analysis method for cross-shaped multi-scale flow pore medium

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Embodiment Construction

[0065] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiment on the reverse side and its description are used to explain the present invention, but not as a limitation to the present invention.

[0066] This embodiment provides a cross-shaped multi-scale flow porous medium full-band elastic wave dispersion attenuation analysis method as follows: figure 1 As shown, the method includes:

[0067] Step S1: The actual complex porous media is equivalent to a "cross-shaped" pore model, which comprehensively reflects the microscopic, mesoscopic and macroscopic flow of pore fluid.

[0068] figure 2 It is an explanatory diagram of the cross-shaped porous medium model of the present invention.

[0069] The specific implementation principle is as follows: the char...

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Abstract

The invention relates to a full-band elastic wave dispersion attenuation analysis method for a cross-shaped multi-scale flow pore medium. The method comprises the following steps: 1, enabling an actual complex pore medium to be equivalent to a cross-shaped pore model; 2, calculating related elasticity and fluid parameters such as solid phase, flow phase and solid-flow coupling according to the full-band elastic wave propagation theory of the cross-shaped multi-scale flow pore medium; 3, solving a plane wave solution according to the full-band elastic wave propagation wave equation of the cross-shaped multi-scale flow pore medium, and generating phase velocities and quality factors of longitudinal waves and transverse waves; and 4, generating a relationship among the elastic wave speed, attenuation and frequency according to the phase speed of the elastic wave and the quality factor. The method can be used for analyzing the change rule of elastic wave frequency dispersion and attenuation in the multiphase pore medium along with frequency, porosity, permeability and the like, and serves for oil and gas reservoir detection and seabed sediment elastic wave detection.

Description

technical field [0001] The present invention relates to the elastic wave propagation model and numerical simulation and analysis technology of sandstone and other porous media, in particular to a full-frequency elastic wave dispersion and attenuation analysis method of cross-shaped multi-scale flow porous media. Background technique [0002] During its more than 150 years of development, oil and gas exploration and development have greatly met the needs of social development for energy and provided an inexhaustible driving force for the sustainable development of economies and societies around the world. Contemporary oil and gas seismic exploration is developing toward fine reservoir description and microscopic pore structure research, and the core issue is to understand the propagation law of elastic waves in the reservoir medium. [0003] Elastic wave, as a form of energy capable of long-distance propagation in seawater, is an important technical means for seabed detection...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F17/11G01N15/08G06F111/10G06F119/14
CPCG06F30/28G06F17/11G01N15/088G06F2111/10G06F2119/14Y02T90/00
Inventor 李红星倪然李涛廖兴任弘利
Owner EAST CHINA UNIV OF TECH
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