ExxonMobil Corp. conducted an assay of the Kissanje Blend crude from the Kizomba B project offshore Angola.
Esso Exploration Angola (Block 15) Ltd. started production from its Kizomba B deepwater project in July 2005 (OGJ Online July 18, 2005).
The $3.5 billion project involves development of 1 billion bbl of oil in Kissanje and Dikanza oil fields, which lie in 3,280 ft of water about 215 miles northwest of Luanda. Production from the fields is to peak at 250,000 b/d (OGJ, Feb. 14, 2005, Newsletter).
Kizomba B includes a tension-leg platform and what Esso Angola parent ExxonMobil Corp. calls the world’s largest floating production, storage, and offloading vessel. It has storage capacity of 2.2 million bbl.
Esso Angola completed the Kizomba B project in 31 months. Total production from Kizomba A, Kizomba B, and the Xikomba project, which went on stream in 2003, was expected to peak at more than 550,000 b/d by yearend 2005.
Esso holds a 40% interest in Block 15. Partners are BP Exploration (Angola) Ltd., 26.67%; ENI Angola Exploration BV, 20%; and Statoil Angola, 13.33%.
Fig. 1 shows a true boiling point (TBP) curve for the whole crude. These data are from ExxonMobil.
Whole crude
- Gravity, °API: 29.6
- Specific gravity, 60° F.: 0.8783
- Pour point, °F.: -33
- Neutralization number (TAN), mg/g: 0.63
- Sulfur, wt %: 0.402
- Viscosity at 20° C., cst: 21.64
- Viscosity at 40° C., cst: 10.89
- Viscosity at 50° C., cst: 8.23
- Viscosity at 100° C., cst: 3.04
- Viscosity at 150° C., cst: 1.67
- Mercaptan sulfur, ppm: 1
- Nitrogen, ppm: 1,860
- Conradson carbon residue, wt %: 4.27
- Nickel, ppm: 13.6
- Vanadium, ppm: 5.1
- Calcium, ppm: 0.5
- rvp, psi: 0.5
- Heat of combustion, gross, btu/lb: 19,202
- Heat of combustion, net, btu/lb: 18,024
- Cetane index: 29
Butanes and lighter
- Yield, vol %: 0.15
- Gravity, °API: 119.94
- Specific gravity, 60° F.: 0.5628
- Carbon, wt %: 82.56
- Hydrogen, wt %: 17.44
- Viscosity at 20° C., cst: 0.35
- Viscosity at 40° C., cst: 0.3
- Viscosity at 50° C., cst: 0.28
- Viscosity at 100° C., cst: 0.21
- Viscosity at 150° C., cst: 0.17
- Nitrogen, ppm: 2.6
- Heat of combustion, net, btu/lb: 19,134
- Paraffins, vol %: 100
- Cetane index: 125
Light naphtha
- TBP cut point, °F.: C 5-165
- Yield, vol %: 5.47
- Gravity, °API: 76.09
- Specific gravity, 60° F.: 0.6816
- Carbon, wt %: 84.74
- Hydrogen, wt %: 15.26
- Viscosity at 20° C., cst: 0.41
- Viscosity at 40° C., cst: 0.35
- Viscosity at 50° C., cst: 0.32
- Viscosity at 100° C., cst: 0.23
- Viscosity at 150° C., cst: 0.18
- Nitrogen, ppm: 2.6
- Heat of combustion, net, btu/lb: 18,711
- Paraffins, vol %: 47.38
- Naphthenes, vol %: 52.59
- Cetane index: 32
Heavy naphtha
- TBP cut point, °F.: 165-330
- Yield, vol %: 12.7
- Gravity, °API: 54.36
- Specific gravity, 60° F.: 0.7613
- Carbon, wt %: 85.77
- Hydrogen, wt %: 14.23
- Sulfur, wt %: 0.0088
- Viscosity at 20° C., cst: 0.78
- Viscosity at 40° C., cst: 0.63
- Viscosity at 50° C., cst: 0.58
- Viscosity at 100° C., cst: 0.38
- Viscosity at 150° C., cst: 0.28
- Mercaptan sulfur, ppm: 2.2
- Nitrogen, ppm: 2.6
- Heat of combustion, net, btu/lb: 18,535
- Paraffins, vol %: 26.16
- Naphthenes, vol %: 64.66
- Aromatics, vol %: 9.32
- Cetane index: 29
Kerosine
- TBP cut point, °F.: 330-480
- Yield, vol %: 13.93
- Gravity, °API: 41.07
- Specific gravity, 60° F.: 0.82
- Carbon, wt %: 86.38
- Hydrogen, wt %: 13.56
- Pour point, °F.: -117
- Sulfur, wt %: 0.0457
- Viscosity at 20° C., cst: 2.14
- Viscosity at 40° C., cst: 1.51
- Viscosity at 50° C., cst: 1.3
- Viscosity at 100° C., cst: 0.74
- Viscosity at 150° C., cst: 0.5
- Mercaptan sulfur, ppm: 2.6
- Nitrogen, ppm: 5.7
- Heat of combustion, net, btu/lb: 18,457
- Paraffins, vol %: 16.81
- Naphthenes, vol %: 65.16
- Aromatics, vol %: 18.83
- Freeze point, °F.: -102.1
- Smoke point, mm: 17.1
- Naphthalenes, vol %: 2
- Cetane index: 40
- Cloud point, °F.: -110
- Aniline point, °F.: 121.4
Diesel
- TBP cut point, °F.: 480-650
- Yield, vol %: 17.4
- Gravity, °API: 32.3
- Specific gravity, 60° F.: 0.8639
- Carbon, wt %: 86.62
- Hydrogen, wt %: 13.12
- Pour point, °F.: -53
- Neutralization number (TAN), mg/g: 0.92
- Sulfur, wt %: 0.1978
- Viscosity at 20° C., cst: 8.49
- Viscosity at 40° C., cst: 4.62
- Viscosity at 50° C., cst: 3.62
- Viscosity at 100° C., cst: 1.55
- Viscosity at 150° C., cst: 0.92
- Nitrogen, ppm: 88.1
- Paraffins, vol %: 35.28
- Naphthenes, vol %: 39.97
- Freeze point, °F.: -31.8
- Cetane index: 50
- Cloud point, °F.: -42
- Aniline point, °F.: 148.3
Vacuum gas oil
- TBP cut point, °F.: 650-1,000
- Yield, vol %: 30.52
- Gravity, °API: 22.51
- Specific gravity, 60° F.: 0.9188
- Carbon, wt %: 86.83
- Hydrogen, wt %: 12.52
- Pour point, °F.: 75
- Neutralization number (TAN), mg/g: 0.72
- Sulfur, wt %: 0.4818
- Viscosity at 20° C., cst: 226.28
- Viscosity at 40° C., cst: 64.17
- Viscosity at 50° C., cst: 39.05
- Viscosity at 100° C., cst: 7.37
- Viscosity at 150° C., cst: 2.92
- Nitrogen, ppm: 1,178
- Conradson carbon residue, wt %: 0.28
- Nickel, ppm: 0.1
- Paraffins, vol %: 20.73
- Naphthenes, vol %: 37.99
- Cetane index: 51
- Aniline point, °F.: 185.2
Vacuum residue
- TBP cut point, °F.: 1,000+
- Yield, vol %: 19.83
- Gravity, °API: 8.7
- Specific gravity, 60° F.: 1.0093
- Pour point, °F.: 89
- Neutralization number (TAN), mg/g: 0.81
- Sulfur, wt %: 0.9548
- Viscosity at 20° C., cst: 22,405,431.55
- Viscosity at 40° C., cst: 633,632.61
- Viscosity at 50° C., cst: 152,603.43
- Viscosity at 100° C., cst: 1,243.71
- Viscosity at 150° C., cst: 93.12
- Nitrogen, ppm: 6,705.6
- Conradson carbon residue, wt %: 18.94
- n-Heptane insolubles, wt %: 0.2
- Nickel, ppm: 61.7
- Vanadium, ppm: 22.8
- Cetane index: 34
CORRECTION: Nelson-Farrar cost indexes
The January 2005 column in the May 1, 2006, Nelson-Farrar cost indexes (OGJ, May 1, 2006, p. 86) actually contained data for January 2004. The correct data appear in the table below.
null