Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Elastic wave evaluating method of two-fluid jet flow model and computer-readable storage medium

An evaluation method and jet flow technology applied in the field of oil and gas geophysics to achieve the effect of coupling

Active Publication Date: 2019-02-01
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, people often use these three theories to deal with problems separately. So far, a cross-scale unified model that integrates the macroscopic Biot theory, the mesoscopic partially saturated patch model and the microscopic jet flow model has not yet appeared.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elastic wave evaluating method of two-fluid jet flow model and computer-readable storage medium
  • Elastic wave evaluating method of two-fluid jet flow model and computer-readable storage medium
  • Elastic wave evaluating method of two-fluid jet flow model and computer-readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

application example 1

[0097] This application example uses the ultrasonic velocities of French Vosgian sandstone saturated with oil and water obtained by Bacri and Salin (1986) [Bacri and Salin, 1986]. In the drainage method, the sandstone is fully saturated with water, and then oil is injected into the sample, and the oil content stops growing at around 33%, which is affected by the irreducible water saturation. In the imbibition method, the sample is completely saturated with oil, and then water is injected into the sample until a residual oil saturation of 35% is reached. The frequency of sound velocity measurement is 350 kHz. The rock parameters of Bacri and Salin [Bacri and Salin, 1986] are shown in Table 1.

[0098] Table 1

[0099]

[0100] image 3 A schematic diagram showing the comparison of the results of the compressional wave velocity prediction of French Vosgian sandstone and the experimental observations according to an embodiment of the present invention, wherein Sw represents ...

application example 2

[0103] This application example uses the wave velocity observation data (Murphy, JOURNAL OF GEOPHYSICAL RESEARCH, 1984) of low-frequency low-porosity unsaturated sandstone (Fort Union sandstone), and compares and analyzes with the predicted results of the present invention. The rock parameters are: matrix bulk modulus 35GPa, skeleton bulk modulus 7.14Gpa, skeleton shear modulus 9.06Gpa, water bulk modulus 2.25GPa, air bulk modulus 0.8MPa, water viscosity 0.001Pa*s, air viscosity 0.00001Pa *s, matrix average density 2.65g / cm3, water density 0.997g / cm3, air density 0.1g / cm3, porosity 0.085, permeability 0.5mD. Fort Union sandstone has the following characteristics: (1) contains more unstable materials (ie, feldspar and rock fragments), with a content of more than 25%; (2) has more open pore spaces or mineral rubble; (3) sandstone grain diameter between 0.125 and 0.15 mm.

[0104] Figure 4 A schematic diagram showing the comparison between the prediction of the longitudinal wa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an elastic wave evaluating method of a two-fluid jet flow model and a computer-readable storage medium. The method comprises: establishing a porous medium dynamics equation based on a single-fluid, single-porosity jet flow model, combining with a porous fluid mass conservation equation to obtain a fluid conservation equation, and then establishing the two-fluid jet flow model; obtaining a higher-order equation of frequency and wavenumber by the porous medium dynamics equation, a derivative of a wave field pressure variable with respect to a radius and an average pressure based on the two-fluid jet flow model; and solving the higher-order equation of frequency and wavenumber in a frequency domain, obtaining a dispersion curve and an attenuation curve, and then analyzing the influence of the two-fluid on the elastic wave. According to the elastic wave evaluating method of the two-fluid jet flow model and the computer-readable storage medium, a petrophysical modelincluding a partially saturated dual porosity medium with macro-mesoscopic-microscopic three dimensions and a plaque jet flow mechanism is established, a comprehensive interpretation of wave field energy dissipation mechanism is realized, and propagation velocities of seismic waves in porous rock medium are predicted based on the model.

Description

technical field [0001] The present invention relates to the technical field of oil and gas geophysics, and more specifically, relates to an elastic wave evaluation method of a two-fluid jet flow model and a computer-readable storage medium. Background technique [0002] In the exploration of unconventional oil and gas resources, people often face difficulties such as complex pore structure of underground reservoir rocks, partial saturation of pore fluid, and nonlinear dynamic response law. The applicability of conventional seismic wave propagation theory faces challenges, which also brings seismic observation Data interpretation is difficult, which has a serious impact on oil and gas resource exploration. In order to consider the influence of pore fluid on seismic waves in rocks, Biot established the theory of elastic wave propagation in isotropic porous media for the first time, and predicted for the first time that there are three kinds of waves in porous media: shear wave...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/133G01V1/30
CPCG01V1/133G01V1/303
Inventor 刘炯孙卫涛陈天胜季玉新刘春园刘韬
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com