A new approach in physical modeling for velocity anisotropy study

Dmitry Popov, Tatiana Chichinina, Viacheslav Polovkov, Dmitry Molodtsov, Pinbo Ding

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Special automated equipment is constructed for ultrasonic velocity measurements at various incidence angles of waves that is necessary for estimation of anisotropy parameters of rocks. As an example on anisotropy study, we perform physical modeling of wave propagation in artificial sample of transversely isotropic (TI) symmetry, which represents a model of fractured rock. The equipment includes hydraulic press for simulation of vertical pressure in the Earth, at a range up to 40 MPa. Computer-controlled positioning system provides precise independent positioning of ultrasonic source and receiver. Using this experimental setup, we acquire P-wave velocity data for plate-stack model formed by acrylic 1 mm thick sheet plates. This setup enables us to perform reliable velocity measurements at the angle interval from 15° to 90° and additional single measurement at 0°. Using measured velocities, we estimate Thomsen's anisotropy parameters ε and δ.

Original languageEnglish
Title of host publication2018 SEG International Exposition and Annual Meeting
PublisherSociety of Exploration Geophysicists
Pages326-330
DOIs
StatePublished - 1 Jan 2019
Event88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018 - Anaheim, United States
Duration: 14 Oct 201819 Oct 2018

Conference

Conference88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018
CountryUnited States
CityAnaheim
Period14/10/1819/10/18

Scopus subject areas

  • Geophysics

Keywords

  • anisotropy
  • modeling
  • VTI
  • ultrasonic

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