Formation damage by CO 2-induced asphaltene precipitation

Research output: Contribution to conferencePaperpeer-review

Abstract

A study was carried out to determine why the presence of water reduces the amount of asphaltenes precipitated during CO 2 injections. Higher injection pressures were needed in limestone cores than sandstone cores during gas flooding due to the low permeabilities of limestone. A very high recovery efficiency of n-C 10 displacement by CO 2 injection was achieved because of the absence of asphaltenes. For reservoirs containing crude oils with high asphaltene content, dry and/or pure CO 2 injection was not economically feasible or attractive as an injection fluid because of the low oil recoveries resulting from reservoir pore blockages. Formation water acted as a CO 2 buffer in tertiary CO 2 injection. More crude oil was displaced by CO 2 injection at > 25°C. This is an abstract of a paper presented at the SPE International Symposium and Exhibition on Formation Damage Control (Lafayette, LA 2/15-17/2006).

Original languageEnglish (US)
StatePublished - May 9 2006
Externally publishedYes
Event2006 SPE International Symposium and Exhibitionon Formation Damage Control - Lafayette, LA, United States
Duration: Feb 15 2006Feb 17 2006

Other

Other2006 SPE International Symposium and Exhibitionon Formation Damage Control
Country/TerritoryUnited States
CityLafayette, LA
Period2/15/062/17/06

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Geotechnical Engineering and Engineering Geology

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