Consistency check and reconciliation of PVT data from samples obtained with formation testers using EOS models
Accurate description of hydrocarbon fluids is critical to field development planning including facilities design, recovery efficiencies and remedial procedures for intervention. Not only are a small number of downhole samples collected but often, they are not representative of the reservoir fluid for a variety of reasons. These include phase separation due to drawdown during sampling and leakage during recovery and transport of the sample. When a two phase sample leaks, the resulting loss of fluids (usually gas) causes the fluid to appear denser than the actual reservoir fluid. Routinely reported opening pressure is utilized for consistency check of the EOS characterized sample by performing an isochoric flash experiment which mimics the actual conditions. A significant discrepancy in modeled and real data often suggests leakage. Using the measured and predicted opening pressure, moles of lost gas are calculated and assuming the composition of lost gas the fluid is reconstructed. Using this technique multiple fluid samples from the same reservoir may also be reconciled and a consistent phase behavior of the fluids determined.
- OSTI ID:
- 468158
- Report Number(s):
- CONF-961003-; TRN: 96:006578-0052
- Resource Relation:
- Conference: 71. annual technical conference and exhibition of the Society of Petroleum Engineers, Denver, CO (United States), 6-9 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 SPE annual technical conference and exhibition: Reservoir engineering; PB: 833 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Application of a regression-based EOS PVT program to laboratory data
Application of a regression-based EOS PVT program to laboratory data