A new method to quantify elastic anisotropy of a transversely isotropic medium

V. Palchik, Y. H. Hatzor, H. J. Vinegar, S. Feinstein, O. Shitrit

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Elastic anisotropy of vertically transversely isotropic (VTI) rocks has been increasingly investigated in the past two decades due to the key role of shales in exploration of oil and gas conventional and unconventional reservoirs. In this presentation we introduce a new anisotropy parameter: “hydrostatic strain ratio” (designated by Ω). It is defined as the ratio between bedding-normal and bedding-parallel contraction in hydrostatic compression, and analyzed based on Hooke’s law for VTI rocks. The Ω parameter is examined here using static and dynamic measurements of dry organic-rich chalk core samples from the Shefela basin, and dynamic data of eight other organic-rich rock formations published by Vernik and Liu (1997). Using the anisotropy results of the examined organic-rich rocks, we propose relationships between Ω and Thomsen’s anisotropy parameters (ε and γ). The anisotropic behavior of the examined organic-rich rocks is found to be very consistent according to the strong connection between Ω and Thomsen’s parameters, and to the similar dependency on organic matter content. We argue that the Ω is advantageous because it can be extracted from static and dynamic measurements, and because it provides a link between elastic VTI rock properties.

Original languageEnglish
Title of host publicationProceedings of 80th EAGE Conference and Exhibition 2018
Subtitle of host publicationOpportunities Presented by the Energy Transition
PublisherEuropean Association of Geoscientists and Engineers, EAGE
ISBN (Electronic)9789462822542
DOIs
StatePublished - 1 Jan 2018
Event80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition - Copenhagen, Denmark
Duration: 11 Jun 201814 Jun 2018

Conference

Conference80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition
Country/TerritoryDenmark
CityCopenhagen
Period11/06/1814/06/18

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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