Impact of injected CO2 on reservoir mineralogy during CO2-EOR

M Nightingale, G Johnson, M Shevalier, I Hutcheon, E. Perkins, B Mayer

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

An investigation of the impact of injected CO2 on reservoir mineralogy was completed as part of the geochemical monitoring and modelling of the Pembina Cardium CO2 Monitoring Project southwest of Drayton Valley, Alberta, Canada. Oil production at the pilot is primarily from the upper two of three stacked sandstone units of the Cardium Formation in the Pembina field. Core analyzed included samples from each of the three sandstone units, and encompassed three distinct time periods: pre-water flood (1955), pre- CO2 flood (2005), and post- CO2 flood (2007). The results of whole rock analysis (XRF, ICP, and XRD), and microscopy (polarizing and electron microprobe) suggest the three separate sandstone units are both texturally and compositionally similar regardless of when the core was recovered. Framework grains are predominately sub-angular to sub-rounded quartz/chert (up to 90.0 wt%), and include smaller amounts of lithic fragments (shale), feldspar (k-feldspar, and albite), mica (muscovite and chlorite), and fluor-apatite. Authigenic pyrite is found as finely disseminated rhombs throughout the formation. Clay minerals present are predominantly kaolinite and illite. Kaolinite appears as fine discrete pore filling books, and is considered to be authigenic. Illite occurs as a major constituent of shale fragments, as well as fine pore bridging strands. The sandstone’s irregular pores are cemented to varying degrees by silica and/or carbonate minerals (calcite and siderite). Dissolution features associated with formation diagenesis, including the degradation of detrital grains (quartz and feldspar), the partial and/or complete removal of carbonate cements, and the presence of residual clays, are found in core from each of the three time periods. Attributing dissolution features in post- CO2 flood core to the interaction of minerals and carbonic acid is difficult due to the geologic history of the formation.
LanguageEnglish
Pages3399-3406
Number of pages8
JournalEnergy Procedia
Volume1
Issue number1
DOIs
Publication statusPublished - 9 Apr 2009

Fingerprint

Mineralogy
Sandstone
Feldspar
Kaolinite
Shale
Quartz
Dissolution
Carbonate minerals
Monitoring
Pyrites
Calcite
Mica
Apatite
Clay minerals
Carbonates
Microscopic examination
Cements
Clay
Minerals
Silica

Keywords

  • CO2-EOR
  • sandstone
  • mineral dissolution
  • microprobe
  • LPNORM
  • reservoir mineralogy

Cite this

Nightingale, M., Johnson, G., Shevalier, M., Hutcheon, I., Perkins, E., & Mayer, B. (2009). Impact of injected CO2 on reservoir mineralogy during CO2-EOR. Energy Procedia, 1(1), 3399-3406. https://doi.org/10.1016/j.egypro.2009.02.129
Nightingale, M ; Johnson, G ; Shevalier, M ; Hutcheon, I ; Perkins, E. ; Mayer, B. / Impact of injected CO2 on reservoir mineralogy during CO2-EOR. In: Energy Procedia. 2009 ; Vol. 1, No. 1. pp. 3399-3406.
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Nightingale, M, Johnson, G, Shevalier, M, Hutcheon, I, Perkins, E & Mayer, B 2009, 'Impact of injected CO2 on reservoir mineralogy during CO2-EOR' Energy Procedia, vol. 1, no. 1, pp. 3399-3406. https://doi.org/10.1016/j.egypro.2009.02.129

Impact of injected CO2 on reservoir mineralogy during CO2-EOR. / Nightingale, M; Johnson, G; Shevalier, M; Hutcheon, I; Perkins, E.; Mayer, B.

In: Energy Procedia, Vol. 1, No. 1, 09.04.2009, p. 3399-3406.

Research output: Contribution to journalArticle

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AU - Johnson, G

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KW - CO2-EOR

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KW - mineral dissolution

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Nightingale M, Johnson G, Shevalier M, Hutcheon I, Perkins E, Mayer B. Impact of injected CO2 on reservoir mineralogy during CO2-EOR. Energy Procedia. 2009 Apr 9;1(1):3399-3406. https://doi.org/10.1016/j.egypro.2009.02.129