Page 46 - PVT Property Correlations

26 PVT Property Correlations

Component Mole %
Sample 1 Sample 2
N 2 0.6 0.67
CO 2 5.6 5.13
C1 68.21 75.28
C2 7.1 8.19
C3 3.89 3.99
iC4 0.8 0.7
nC4 1.7 1.5
iC5 0.7 0.5
nC5 0.8 0.6
C6 1.51 0.72
C7 1 9.2 2.66
C7 1 molecular weight 242 140
C7 1 specific gravity 0.872 0.7832
Temperature, F 283 293

2.3 The following reservoir parameters and laboratory-measured PVT prop-
erties are available for a reservoir fluid produced by a petroleum com-
pany. Identify the fluid type. Explain all the criteria used in the fluid
identification and discuss whether each criterion agrees or disagrees
with your fluid classification.
Reservoir Parameters
T, F 239
API 41.2
Gas gravity 0.874
Oil FVF 4.08
Rs 7803

Pressure Oil Gas Z- Oil Gas Rs Oil Gas Compressibility
3
-6
(psig) Density Gravity Factor FVF FVF (ft / Viscosity Viscosity (1/psi x 10 )
3
(g/cm ) (bbl/ scf) (cp) (cp)
STB)
7000 0.65 3.55 7803 0.13
6500 0.64 3.62 7803 0.12 40.9998
6000 0.62 3.72 7803 0.12 49.9998
5501 0.6 3.83 7803 0.11 58.9818
5001 0.58 3.96 7803 0.11 67.9818
4604 0.56 4.48 7803 0.11
4001 0.57 0.874 0.809 4.07 0.0039 6862 0.11 0.032
3500 0.58 0.8846 0.768 3.74 0.0043 6081 0.12 0.029
3001 0.59 0.899 0.736 3.39 0.0048 5302 0.13 0.026
2500 0.61 0.912 0.717 3.05 0.0056 4520 0.14 0.023
2001 0.62 0.9268 0.732 2.72 0.0072 3741 0.15 0.02
1501 0.64 0.9415 0.7813 2.37 0.0102 2961 0.17 0.016
1001 0.66 0.9662 0.844 2.03 0.01641 2180 0.21 0.014
501 0.69 1.002 0.918 1.69 0.0352 1400 0.42 0.013
0 0.74 1.0888 0.997 1.1 1.3404 0 1.036 0.012
2.4 Identify the fluid type from the simple information given below for
each one of the following five fluids: