Experimental Verification of MOC Theory for Three and Four Component Systems
Abstract/Contents
- Abstract
- The method of characteristics (MOC) to solve one-dimensional two-phase flow problems analytically has been used by many authors [7, 9, 10, 15, 18]. Recent MOC analytical solutions have shown that in four-component condensing/vaporizing (C/V) displacements, the crossover tie line controls the development of miscibility. A series of displacement experiments were performed with water, isopropanol, n-propanol, and iso-octane mixtures, in an unconsolidated glass bead pack. The purpose was to validate properties of three-component displacements, as well as the existence of the crossover tie line in four-component displacements.Three-component vaporizing displacement experiments agreed well with analytical solutions. With condensing displacements however, only initial breakthrough times matched closely. It is believed that the post breakthrough production data were unduly affected by capillary forces. The result was a shift in the data towards the nonwetting side of the phase diagram, relative to analytical solutions.All four-component displacements studied showed a leading condensing zone followed by a trailing vaporizing zone. This behavior is predicted by MOC theory and has been observed by other authors [22,26,28]. The nontie-line paths taken approach a tie line well within the two phase region, suggesting that a third key tie line influences the displacement process, i.e.: the crossover tie line. A crossover tie line was never specifically identified, due to the same smearing effect seen in three-component condensing displacements. However, three displacements with initial and injection tie lines close to critical tie lines, clearly showed multi-contact miscible (MCM) behavior. To have an MCM displacement, while maintaining the initial and injection tie lines within the two-phase region implies that miscibility was controlled by another tie line (crossover) which was moved to the critical locus. These three runs prove the existence of a crossover tie line. They furthermore illustrate that in C/V displacements, the crossover tie line controls miscibility.
Description
| Type of resource | text |
|---|---|
| Date created | January 1994 |
Creators/Contributors
| Author | Batycky, Roderick Panko |
|---|---|
| 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 |
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Preferred citation
- Preferred Citation
- Batycky, Roderick Panko. (1994). Experimental Verification of MOC Theory for Three and Four Component Systems. Stanford Digital Repository. Available at: https://purl.stanford.edu/jy970wp1819
Collection
Master's Theses, Doerr School of Sustainability
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