Comparative Analysis of Sonic Velocities in Partially Saturated Rocks Containing H2, CH4, N2 and CO2

Jimmy Xuekai Li, Jinghao Hu, Tiancheng Zhang, Zhongwei Chen

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

Abstract

The understanding of the seismic signature of the partially saturated formation is critical to seismic monitoring in the hydrogen geo-storage, CO2 geo-sequestration and geophysical survey and exploration of oil and gas reservoir. The main objective of this study is to model the wave propagation in partially saturated rocks containing two immiscible fluids (i.e., gas-water), with a comparative case study on hydrogen (H2), methane (CH4), nitrogen (N2) and carbon dioxide (CO2) bearing rocks. The sonic velocities and the attenuations are influenced by several parameters, which interact in a complex pattern, particularly when the rock is saturated with multiple fluids. We developed a rock physics model that considers the effects of patchy saturation, wettability, effective pressure, and relative permeability. By examining wave propagation in each fluid-saturated case against water saturation, we improve our understanding of sonic velocity changes as water saturation varies.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - Asia Pacific Unconventional Resources Symposium, APUR 2023
PublisherSociety of Petroleum Engineers
ISBN (Electronic)9781959025146
DOIs
StatePublished - 2023
Externally publishedYes
Event2023 Asia Pacific Unconventional Resources Symposium, APUR 2023 - Brisbane, Australia
Duration: 14 Nov 202315 Nov 2023

Publication series

NameSociety of Petroleum Engineers - Asia Pacific Unconventional Resources Symposium, APUR 2023

Conference

Conference2023 Asia Pacific Unconventional Resources Symposium, APUR 2023
Country/TerritoryAustralia
CityBrisbane
Period14/11/2315/11/23

Keywords

  • CO
  • H
  • Patchy Saturation
  • Relative Permeability
  • Seismic Monitoring
  • Wettability

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