Question:
The figure shows a schematic representation of the organic solid phase diagram for wax, hydrate, and asphaltene deposition around the bubble point of a sample reservoir fluid. Arrowheads indicate the stable region for a corresponding organic solid. Match the phase diagram with organic solids.
The figure shows a schematic representation of the organic solid phase diagram for wax, hydrate, and asphaltene deposition around the bubble point of a sample reservoir fluid. Arrowheads indicate the stable region for a corresponding organic solid. Match the phase diagram with organic solids.
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Hydrates form at low temperature–high pressure, wax precipitates when temperature drops below WAT, and asphaltenes destabilize near the bubble point pressure.
Updated On: Aug 30, 2025
- I - Wax; II - Hydrate; III - Asphaltene
- I - Hydrate; II - Asphaltene; III - Wax
- I - Asphaltene; II - Hydrate; III - Wax
- I - Hydrate; II - Wax; III - Asphaltene
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The Correct Option is D
Solution and Explanation
- The diagram shows three regions where solid deposition occurs under varying temperature and pressure.
- Hydrates (I): They form at high pressure and low temperature (top-left region). Hence, region (I) corresponds to hydrates.
- Wax (II): Wax deposition occurs at moderate pressure and lower temperature relative to bubble point, typically indicated by the WAT (Wax Appearance Temperature). This matches region (II).
- Asphaltenes (III): Asphaltene precipitation is usually pressure-driven, occurring near or below the bubble point pressure. Hence, region (III) corresponds to asphaltenes.
- Thus, the correct mapping is (D) I - Hydrate; II - Wax; III - Asphaltene.
- Hydrates (I): They form at high pressure and low temperature (top-left region). Hence, region (I) corresponds to hydrates.
- Wax (II): Wax deposition occurs at moderate pressure and lower temperature relative to bubble point, typically indicated by the WAT (Wax Appearance Temperature). This matches region (II).
- Asphaltenes (III): Asphaltene precipitation is usually pressure-driven, occurring near or below the bubble point pressure. Hence, region (III) corresponds to asphaltenes.
- Thus, the correct mapping is (D) I - Hydrate; II - Wax; III - Asphaltene.
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