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Chemical Analysis of Water-accommodated Fractions of Crude Oil Spills Using TIMS-FT-ICR MS
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New method for stock-tank oil compositional analysis.

Kristine McAndrews1, John Nighswander, Konstantin Kotzakoulakis

  • 1Oilphase-DBR, Schlumberger, P.O. Box 16818, Jebel Ali, Dubai, U.A.E.

Journal of Chromatographic Science
|May 30, 2009
PubMed
Summary
This summary is machine-generated.

A new gas chromatography method improves stock-tank oil analysis accuracy offshore. It replaces traditional techniques with correlations, reducing errors and simplifying sample preparation for better results.

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Area of Science:

  • Petroleum Geochemistry
  • Analytical Chemistry

Background:

  • Traditional gas chromatography for stock-tank oil analysis faces challenges in non-laboratory settings.
  • Extended hydrocarbon analysis can introduce errors due to equipment and technique limitations offshore.

Purpose of the Study:

  • To develop and validate a novel gas chromatography method for accurate stock-tank oil composition determination.
  • To address and mitigate errors associated with traditional methods in field analysis.

Main Methods:

  • Developed a new gas chromatography approach for analyzing stock-tank oil up to normal pentatriacontane.
  • Replaced experimental molecular weight determination (freezing point depression) with predictive correlations.
  • Utilized correlations to estimate unrecovered sample fractions, replacing internal standards.

Main Results:

  • The new method provides accurate stock-tank oil composition analysis.
  • Correlations effectively estimate molecular weight and unrecovered sample fractions.
  • Reduced experimental steps lead to decreased analytical uncertainty.

Conclusions:

  • The validated gas chromatography method offers a more accurate and efficient approach for stock-tank oil analysis.
  • The method is suitable for use in challenging environments like offshore platforms.
  • Employing correlations enhances the reliability and simplifies field-based hydrocarbon analysis.