Based on a sample taken Jan. 26, 2023, Equinor ASA on the same day issued an updated commercial assay of Njord crude oil to better represent the quality of this blend to its customers. The revised assay, which reflects the addition of production from Fenja field, became effective for liftings in March 2023.
The assay update follows completed upgrades to both the Njord A platform and floating storage and offloading vessel (FSO), which has doubled the life of Njord field in 330 m of water in the Norwegian Sea, 30 km west of Draugen and 130 km northwest of Kristiansund.
The Njord A platform and Njord Bravo FSO were brought ashore in 2016 for extensive refurbishments after 19 years of production, marking the first time a platform and a FSO have been disconnected from the field, upgraded, and towed back. Equinor-operated Bauge and Neptune Energy Norge AS-operated Fenja fields were developed in parallel with the upgrading project.
After 6 years, Njord production resumed Dec. 27, 2022, with the field now equipped to produce until 2040.
Produced oil from Njord is delivered via pipeline to the FSO and onwards by tankers to market. Natural gas is exported through a 40-km pipeline connected to the Åsgard system for transport to Kårstø terminal.
Equinor Energy AS (27.5%) operates Njord on behalf of partners Wintershall Dea Norge AS (50%), and Neptune Energy Norge (22.5%).
Whole crude
Density at 15° C., kg/l.: 0.816
API gravity at 60/60° F.: 41.8
UOP K factor: 12.2
Total sulfur, wt %: 0.079
Mercaptan sulfur, ppm: 1.0
Total nitrogen, ppm: 278
Basic nitrogen, ppm: 89.000
Total acid no., mg KOH/g: 0.03
Reid vapor pressure, psi: 6.7
Vis. at 20° C., cst: 3.41
Vis. at 40° C., cst: 2.49
Vis. at 50° C., cst: 2.17
Paraffins, wt %: 34.2
Naphthenes, wt %: 37.9
Aromatics, wt %: 27.9
Pour point, °C.: 11
Wax, wt %: 8.0
C7 asphaltenes, wt %: 0.1
Micro carbon residue, wt %: 0.6
Rams. carbon residue, wt %: 0.5
Vanadium, ppm (wt): 0.4
Nickel, ppm (wt): 0.3
Methane + ethane, wt %: 0.02
Propane, wt %: 0.34
iso-Butane, wt %: 0.31
n-Butane, wt %: 1.39
iso-Pentane, wt %: 1.06
n-Pentane, wt %: 1.62
Cyclopentane, wt %: 0.16
C6 paraffins, wt %: 2.85
C6 naphthenes, wt %: 1.85
Benzene, wt %: 0.39
C7 paraffins, wt %: 2.56
C7 naphthenes, wt %: 2.90
Toulene, wt %: 0.88
Atmospheric distillation
C5 - 65° C.
Pentanes to 65° C.
Yield on crude, wt %: 4.2
Yield on crude, vol %: 5.4
Cumulative yield, wt %: 6.3
Density at 15° C., kg/l.: 0.643
API gravity at 60/60° F.: 88.5
Mercaptan sulfur, ppm: 0.1
RON (clear): 77.4
MON (clear): 76.7
Paraffins, wt %: 96.2
Naphthenes, wt %: 3.8
Hydrogen, wt %: 16.5
65 - 100° C.
Yield on crude, wt %: 7.07
Yield on crude, vol %: 7.9
Cumulative yield, wt %: 13.3
Density at 15° C., kg/l.: 0.719
API gravity at 60/60° F.: 65.4
Mercaptan sulfur, ppm: 0.5
RON (clear): 56.9
MON (clear): 55.1
Paraffins, wt %: 57.5
Naphthenes, wt %: 36.9
Aromatics, wt %: 5.5
Hydrogen, wt %: 15.1
100 - 150° C.
Yield on crude, wt %: 11.3
Yield on crude, vol %: 12.0
Cumulative yield, wt %: 24.5
Density at 15° C., kg/l.: 0.766
API gravity at 60/60° F.: 53.1
UOP K factor: 11.7
Sulfur, ppm: 0.001
Mercaptan sulfur, ppm: 0.7
Total acid no., mg KOH/g: 0.01
RON (clear): 60.3
MON (clear): 57.3
Paraffins, wt %: 39.5
Naphthenes, wt %: 40.6
Aromatics, wt %: 19.9
Aniline point, °C.: 50.2
Hydrogen, wt %: 13.9
150 - 200° C.
Yield on crude, wt %: 9.8
Yield on crude, vol %: 10.0
Cumulative yield, wt %: 34.3
Density at 15° C., kg/l.: 0.784
API gravity at 60/60° F.: 48.8
UOP K factor: 11.9
Sulfur, ppm: 0.004
Mercaptan sulfur, ppm: 0.9
Total acid no., mg KOH/g: 0.01
Vis. at 20° C., cst: 1.18
Vis. at 40° C., cst: 0.94
RON (clear): 40.9
MON (clear): 38.5
Paraffins, wt %: 44.5
Naphthenes, wt %: 33.3
Aromatics, wt %: 16.9
Freeze point, °C.: -65
Smoke point, mm: 27
Cetane index: 41
Naphthalenes, vol %: 0.2
Aniline point, °C.: 56.1
Hydrogen, wt %: 14.2
200 - 250° C.
Yield on crude, wt %: 9.8
Yield on crude, vol %: 9.8
Cumulative yield, wt %: 44.1
Density at 15° C., kg/l.: 0.814
API gravity at 60/60° F.: 42.3
UOP K factor: 11.83
Sulfur, ppm: 0.013
Mercaptan sulfur, ppm: 1.0
Total nitrogen, ppm: 1
Basic nitrogen, ppm: 0.761
Total acid no., mg KOH/g: 0.02
Vis. at 40° C., cst: 1.62
Vis. at 50° C., cst: 1.40
Pour point, °C.: -46
Cloud point, °C.: -44
Freeze point, °C.: -42
Smoke point, mm: 23
Cetane index: 48
Naphthalenes, vol %: 3.2
Aniline point, °C.: 64.7
Hydrogen, wt %: 13.7
250 - 300° C.
Yield on crude, wt %: 10.6
Yield on crude, vol %: 10.3
Cumulative yield, wt %: 54.7
Density at 15° C., kg/l.: 0.838
API gravity at 60/60° F.: 37.3
UOP K factor: 11.9
Sulfur, ppm: 0.031
Mercaptan sulfur, ppm: 0.9
Total nitrogen, ppm: 8
Basic nitrogen, ppm: 4.673
Total acid no., mg KOH/g: 0.02
Vis. at 40° C., cst: 2.97
Vis. at 50° C., cst: 2.44
Pour point, °C.: -21
Cloud point, °C.: -20
Freeze point, °C.: -16
Smoke point, mm: 19
Cetane index: 55
Naphthalenes, vol %: 7.3
Aniline point, °C.: 72.0
Hydrogen, wt %: 13.4
300 - 350° C.
Yield on crude, wt %: 9.4
Yield on crude, vol %: 9.0
Cumulative yield, wt %: 64.1
Density at 15° C., kg/l.: 0.856
API gravity at 60/60° F.: 33.7
UOP K factor: 12.0
Sulfur, ppm: 0.088
Total nitrogen, ppm: 54
Basic nitrogen, ppm: 23.220
Total acid no., mg KOH/g: 0.03
Vis. at 40° C., cst: 5.63
Vis. at 50° C., cst: 4.37
Pour point, °C.: 4
Cloud point, °C.: 4
Cetane index: 62
Naphthalenes, vol %: 12.2
Aniline point, °C.: 79.2
Hydrogen, wt %: 13.2
350 - 370° C.
Yield on crude, wt %: 3.4
Yield on crude, vol %: 3.2
Cumulative yield, wt %: 67.6
Density at 15° C., kg/l.: 0.867
API gravity at 60/60° F.: 31.7
UOP K factor: 12.0
Sulfur, ppm: 0.119
Total nitrogen, ppm: 129
Basic nitrogen, ppm: 52.060
Total acid no., mg KOH/g: 0.03
Vis. at 40° C., cst: 10.00
Vis. at 50° C., cst: 7.42
Pour point, °C.: 17
Cetane index: 69
Aniline point, °C.: 86.0
Hydrogen, wt %: 13.2
370° + C.
Yield on crude, wt %: 32.4
Yield on crude, vol %: 29.4
Cumulative yield, wt %: 100.0
Density at 15° C., kg/l.: 0.898
API gravity at 60/60° F.: 26.1
UOP K factor: 12.3
Sulfur, ppm: 0.190
Total nitrogen, ppm: 826
Basic nitrogen, ppm: 259.800
Total acid no., mg KOH/g: 0.03
Vis. at 50° C., cst: 47.70
Vis. at 60° C., cst: 31.5
Vis. at 100° C., cst: 9.26
Pour point, °C.: 42
Wax, wt %: 18.7
C7 asphaltenes, wt %: 0.2
Micro carbon residue, wt %: 1.8
Rams. carbon residue, wt %: 1.6
Vanadium, ppm (wt): 1.1
Nickel, ppm (wt): 1.0
Vacuum distillation
370 - 450° C.
Yield on crude, wt %: 14.8
Yield on crude, vol %: 13.8
Density at 15° C., kg/l.: 0.879
API gravity at 60/60° F.: 29.5
UOP K factor: 12.2
Sulfur, ppm: 0.122
Total nitrogen, ppm: 262
Basic nitrogen, ppm: 96.290
Total acid no., mg KOH/g: 0.03
Vis. at 50° C., cst: 16.90
Vis. at 60° C., cst: 12.2
Vis. at 100° C., cst: 4.62
Pour point, °C.: 32
Aniline point, °C.: 96.7
Hydrogen, wt %: 13.1
Wax, wt %: 19.1
450 - 500° C.
Yield on crude, wt %: 7.4
Yield on crude, vol %: 6.8
Density at 15° C., kg/l.: 0.889
API gravity at 60/60° F.: 27.7
UOP K factor: 12.4
Sulfur, ppm: 0.149
Total nitrogen, ppm: 488
Basic nitrogen, ppm: 159.400
Total acid no., mg KOH/g: 0.03
Vis. at 50° C., cst: 35.70
Vis. at 60° C., cst: 24.3
Vis. at 100° C., cst: 7.75
Pour point, °C.: 45
Aniline point, °C.: 104.9
Hydrogen, wt %: 13.0
Wax, wt %: 21.5
500 - 550° C.
Yield on crude, wt %: 4.6
Yield on crude, vol %: 4.1
Density at 15° C., kg/l.: 0.906
API gravity at 60/60° F.: 24.6
UOP K factor: 12.4
Sulfur, ppm: 0.208
Total nitrogen, ppm: 821
Basic nitrogen, ppm: 268.290
Total acid no., mg KOH/g: 0.03
Vis. at 50° C., cst: 92.80
Vis. at 60° C., cst: 58.0
Vis. at 100° C., cst: 14.50
Pour point, °C.: 51
Aniline point, °C.: 106.7
Hydrogen, wt %: 12.8
Wax, wt %: 20.2
Micro carbon residue, wt %: 0.8
Rams. carbon residue, wt %: 0.8
550° + C.
Yield on crude, wt %: 5.6
Yield on crude, vol %: 4.8
Density at 15° C., kg/l.: 0.959
API gravity at 60/60° F.: 16.0
UOP K factor: 12.2
Sulfur, ppm: 0.407
Total nitrogen, ppm: 2,762
Basic nitrogen, ppm: 817.170
Total acid no., mg KOH/g: 0.04
Vis. at 100° C., cst: 157.00
Vis. at 130° C., cst: 46.9
Pour point, °C.: 37
Wax, wt %: 12.7
C7 asphaltenes, wt %: 0.9
Micro carbon residue, wt %: 9.7
Rams. carbon residue, wt %: 8.6
Vanadium, ppm (wt): 6.3
Nickel, ppm (wt): 6.0
