[Zurück]


Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag):

C. Kanakaki, R. Kadnar, E. Rosenberg:
"Methid Development for the Determination for the Analysis of Fluorobenzoic Acids Used as Organic Tracers for Reservoir Exploration Studies";
Vortrag: 9. ASAC JunganalytikerInnen Forum, Wien; 21.06.2013 - 22.06.2013.



Kurzfassung englisch:
Introduction
In the petrochemical industry there is a vital need for the characterization and understanding of oil and gas reservoir geometry, and the flow patterns that are existing or may be induced in these reservoirs during exploitation. Many different characterization tools are nowadays available, such as the tracing tests [1]. Interwell tracing techniques, involving multiple injection and production points, have proven to be the main useful tool in complex oil reservoirs, providing reliable, definitive and unambiguous information on flood patterns within the reservoir [2].

Many different types of water and gas tracers for both single and interwell tests have been used in the petroleum industry during the last decades. Fluorinated benzoic acids, like those examined in this work, are the water tracers with the widest use, due to their favorable physico-chemical properties.

Methods
This work will discuss the method development for the analysis of a large set of fluorobenzoic acids (FBAs), based on a simple and efficient derivatisation technique, solid-phase extraction (SPE) for pre-concentration and analysis by gas chromatography/mass spectrometry (GC/MS).

Results and Discussion
Optimization of the individual steps of the method was performed and yielded a method that allows to quantitatively determine up to 14 different FBAs in one run. Depending on the pre-concentration factor, the method provides a sensitivity down to the low ppb range for individual compounds which allows their efficient use in interwell tracer studies.

Innovative aspects
The significance of the developed method is basically lying on the following aspect:

. The derivatization reagent used in this study (trimethylsulfornium hydroxide, TMSH) is a suitable replacement for other derivatization reagents that are tedious or inconvenient to handle, and may produce reaction products unstable in water.
. An even more sensitive detection could be achieved by improvements in the SPE step and the resulting pre-concentration factor, for example in cases when bigger volumes are used and can be easily handled by an automated method performed by the industries.
. The improved number of compounds that can be simultaneously determined, further enhances the usefulness of the method, especially when interwell tracing tests are performed.

References
[1] Serres-Piole, C., Commarieu, A., Garraud, H., Lobinski, R. and Preud´homme, H., "New Passive Water Tracers for Oil Field Applications", Energy Fuels, 25 (2011) 4488-4496
[2] Du, Y. and Guan, L., "Interwell tracer tests: Lessons learned from past field studies", Society of Petroleum Engineers Inc. (2005) SPE 93140

Acknowledgements
Financial support of this study by the OMV Exploration & Production GmbH, Austria, is gratefully acknowledged.

Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.