Supercritical Fluid Chromatography for Crude Oil Characterization
Abstract/Contents
- Abstract
- This report discusses two results related to the application of supercritical fluid chromatography (SFC) in characterizing crude oils. The first result is a simplified technique for determining the carbon number distribution of light crude oils. The most widely used method of determining crude oil compositions is simulated distillation with a gas chromatograph. Since all of the crude oil cannot be eluted through the column, an additional chromatographic run of the crude oil with an internal standard must be made. This additional run is used to calculate the total amount of crude oil injected, which is needed in the calculations. With SFC, all or almost all of the crude oil can be eluted, and the extra run with an internal standard is not needed. The elimination of the second run greatly simplifies the compositional analysis. The proposed procedure is tested with 21 different crude oils. The second result is an approach that can be used to develop a minimum miscibility pressure (MMP) correlation. Previous researchers have shown that the MMP of crude oils depends upon the relative amount of compounds in the crude oil that are easily extracted into the CO2-rich phase. Also, compounds that easily partition into COz are the first components to elute in SFC. Thus, some relation should exist between the SFC elution behavior of a crude oil and its MMP. The relation proposed in this paper correlates the density of the CO2 at the MMP with the fraction of the crude that elutes before n-C2+ This proposal is tested with 15 crude oils. The results correctly predict MMP versus composition trends. More crude oils from hotter reservoirs will need to be analyzed before a general correlation can be developed.
Description
| Type of resource | text |
|---|---|
| Date created | June 1989 |
Creators/Contributors
| Author | Stadler, Maurice Phillip |
|---|---|
| Primary advisor | Orr Jr, Franklin M. |
| Degree granting institution | Stanford University, Department of Petroleum Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Genre | Thesis |
Bibliographic information
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Preferred citation
- Preferred Citation
- Stadler, Maurice Phillip. (1989). Supercritical Fluid Chromatography for Crude Oil Characterization. Stanford Digital Repository. Available at: https://purl.stanford.edu/br922mr1816
Collection
Master's Theses, Doerr School of Sustainability
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