Petroleum Reservoir that reside in reservoirs with the original temperatures lying between the pseudo-critical temperature and the Cricondentherm .
Natural Gas Reservoir with initial formation temperature lying between the pseudo-critical temperature and the Cricondentherm , which initially stays gaseuous (outside Vapour Liquid Envelope) and builds condensate at separator (inside Vapour Liquid Envelope, see Fig. 1).
Fig. 1. Production path of the Retrograde Gas Condensate Reservoir on the Phase Equilibrium Diagram. The downward solid black arrow shows a reservoir pressure depletion path. The downward grey dash arrow shows a wellbore lift pressure drop path. |
Table 1 – Example of Condensate composition (in mol % )
CO2 | 2.37 |
N2 | 0.31 |
C1 | 73.19 |
C2 | 7.80 |
C3 | 3.55 |
i C4 | 0.71 |
n C4 | 1.45 |
i C5 | 0.64 |
n C5 | 0.68 |
C6s | 1.09 |
C7+ | 8.21 |
Rs (SCF/STB) | 5965 |
Rv (STB/MMSCF) | 165 |
API gravity | 48.5 |
M7+ | 184 |
γ7+ | 0.816 |
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum Reservoir / Hydrocarbon reservoir / Natural Gas Reservoir
[ Hydrocarbon Reserves ][ Depletion ]
William D. Mc-Cain, Jr.; "The Properties of Petroleum Fluids"; second edition; 1990; Pennwell publishing company. ISBN10-9781593703738 |