Time-lapse pre-stack seismic inversion with thin bed resolution for CO2 sequestration from Cranfield, Mississippi

Rui Zhang, Mrinal K. Sen, Sanjay Srinivasan

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Time-lapse surface seismic surveys have been used for CO2 sequestration monitoring at Cranfield, Mississippi. The 3D time-lapse seismic data were recorded both before (2007) and after (2010) CO2 injection. The injection interval is the lower Tuscaloosa sandstone formation, which appears as a thin layer and displays weak signature due to CO2 injection in the post-stack seismic amplitudes. Previous studies have reported inversion of time-lapse acoustic impedances for CO2 plume mapping. However, the acoustic impedances lack elastic information, which are more sensitive to the fluid variation. To address this, we applied a basis pursuit pre-stack inversion on time-lapse Amplitude Versus Angle (AVA) datasets to obtain elastic properties (Vp, Vs, density and Vp-Vs ratio). The inverted elastic properties show improved resolution and provide reasonable fits to the well-log data. The temporal changes of inverted elastic properties provide a basis for mapping the CO2 plume after three years' injection, demonstrating their effectiveness for a CO2 sequestration study.

Original languageEnglish (US)
Pages (from-to)223-229
Number of pages7
JournalInternational Journal of Greenhouse Gas Control
Volume20
DOIs
StatePublished - Jan 2014

All Science Journal Classification (ASJC) codes

  • Pollution
  • Energy(all)
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law

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