Modelling of long-term along-fault flow of CO2 from a natural reservoir

Jeroen Snippe, Niko Kampman, Kevin Bisdom, Tim Tambach, Rafael March, Christine Maier, Tomos Phillips, Nathaniel Forbes Inskip, Florian Doster, Andreas Busch

Research output: Contribution to journalArticlepeer-review

3 Downloads (Pure)

Abstract

As part of the European ACT-sponsored research consortium, DETECT, we developed an integrated characterisation and risk assessment toolkit for natural fault/fracture pathways. In this paper, we describe the DETECT experimental-modelling workflow, which aims to be predictive for fault-related leakage quantification, and its application to a field case example for validation. The workflow combines laboratory experiments to obtain single-fracture stress-dependent permeabilities; single-fracture modelling for stress-dependent relative permeabilities and capillary pressures; fracture network characterisation and modelling for the caprock(s); upscaling of properties and constitutive functions in fracture networks; and full compositional flow modelling at field scale.

Here we focus on the application of the workflow to the Green River site in Utah. This is a rare case of leakage from a shallow natural CO2 reservoir, where CO2 (dissolved or gaseous) migrates along two fault zones to the surface. This site provides a unique opportunity to understand CO2 leakage mechanisms and volumes along faults, because of its extensive characterisation including a large dataset of present-day CO2 surface flux measurements as well as historical records of CO2 leakage in the form of travertine mounds. When applied to this site, our methodology predicts leakage locations accurately and, within an order of magnitude, leakage rates correctly without extensive history matching. Subsequent history matching achieves accurate leak rate matches within a-priori uncertainty ranges for model input parameters.
Original languageEnglish
Article number103666
JournalInternational Journal of Greenhouse Gas Control
Volume118
Early online date27 Apr 2022
DOIs
Publication statusPublished - Jul 2022

Keywords

  • CO2 storage
  • Green River
  • fault
  • fracture
  • leakage
  • mineralisation
  • model
  • stress

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Modelling of long-term along-fault flow of CO2 from a natural reservoir'. Together they form a unique fingerprint.

Cite this