Based on a sample taken Feb. 4, 2014, BP PLC has published an updated assay of its Saturno Blend crude oil, which is the marketing name for production from Plutão, Saturno, Venus, and Marte (PSVM) fields in the ultradeepwater area of Block 31 off Angola (OGJ Online, Jan. 31, 2013; Feb. 4, 2009; Nov. 24, 2003; Mar. 17, 2003).
The four fields, located within about 18 miles of each other, are tied back to a 157,000-b/d floating production storage and offloading (FPSO) vessel, from which Saturno Blend is directly exported.
Production from PSVM began on Dec. 6, 2012, with the first cargo of Saturno-branded crude offloaded from the FPSO on Dec. 25, 2012, according to a Jan. 31, 2013, release from BP.
BP Exploration (Angola) Ltd. acts as operator of Block 31 and holds a 26.67% interest. Other interest owners include Angola's state-owned Sonangol EP (25%), the block's concessionaire; Sonangol P&P (20%); Statoil Angola AS (13.33%); Marathon International Petroleum Angola Block 31 Ltd. (10%); and SSI Block 31 (5%).
Whole crude
API gravity at 60/60° F.: 27.0
Density at 15° C., kg/l.: 0.8925
Total sulfur, wt %: 0.810
Mercaptan sulfur, wt %: 0.0002
Vis. at 20° C., cst: 40.40
Vis. at 30° C., cst: 26.10
Vis. at 40° C., cst: 17.90
Vis. at 50° C., cst: 12.70
Vis. at 60° C., cst: 9.47
Vis. at 100° C., cst: 3.82
Pour point, °C.: -42
Wax, wt %: 6.0
Total nitrogen, ppm (wt): 2,140.00
Basic nitrogen, ppm (wt): 566
Acidity, mg KOH/g: 0.6310
Carbon residue, wt %: 5.880
Asphaltenes, wt %: 1.5400
Vanadium, ppm (wt): 27.5
Nickel, ppm (wt): 24.3
Iron, ppm (wt): 11.4
C2, wt %: 0.01
C3, wt %: 0.19
i-C4, wt %: 0.16
n-C4, wt %: 0.54
C5 to 95° C.
Yield on crude, wt %: 4.300
Yield on crude, vol %: 5.58
Density at 15° C., kg/l.: 0.6867
Total sulfur, wt %: 0.004
Mercaptan sulfur, wt %: 0.0003
Total nitrogen, ppm (wt): 0.03
Acidity, mg KOH/g: 0.0298
Research octane no.: 70.2
Paraffins, wt %: 66.1
n-Paraffins, wt %: 26.7
Naphthenes, wt %: 33.3
Aromatics, wt %: 0.6
95-175° C.
Yield on crude, wt %: 9.158
Yield on crude, vol %: 10.65
Density at 15° C., kg/l.: 0.7665
Total sulfur, wt %: 0.019
Mercaptan sulfur, wt %: 0.0002
Total nitrogen, wt (ppm): 0.38
Acidity, mg KOH/g: 0.4540
Research octane no.: 42.4
Paraffins, wt %: 37.4
n-Paraffins, wt %: 12.1
Naphthenes, wt %: 50.4
Aromatics, wt %: 12.3
C5 to 149° C.
Yield on crude, wt %: 10.141
Yield on crude, vol %: 12.44
Density at 15° C., kg/l.: 0.7267
Total sulfur, wt %: 0.010
Mercaptan sulfur, wt %: 0.0002
Total nitrogen, wt (ppm): 0.13
Acidity, mg KOH/g: 0.1820
Research octane no.: 64.7
Paraffins, wt %: 49.4
n-Paraffins, wt %: 18.9
Naphthenes, wt %: 44.6
Aromatics, wt %: 6.1
149-232° C.
Yield on crude, wt %: 11.555
Yield on crude, vol %: 12.82
Density at 15° C., kg/l.: 0.8040
Total sulfur, wt %: 0.054
Mercaptan sulfur, wt %: 0.0002
Vis. at 40° C., cst: 1.17
Vis. at 60° C., cst: 0.91
Total nitrogen, wt (ppm): 2.00
Acidity, mg KOH/g: 0.9840
Smoke point, mm: 23
Freezing point, °C.: -68
Cetane index (ASTM D4737-90): 39.5
Refractive index at 70° C.: 1.4243
Aromatics, vol %: 20.10
Naphthalenes, vol %: 0.7
232-342° C.
Yield on crude, wt %: 17.679
Yield on crude, vol %: 18.40
Density at 15° C., kg/l.: 0.8566
Total sulfur, wt %: 0.307
Mercaptan sulfur, wt %: 0.0003
Vis. at 50° C., cst: 3.11
Vis. at 100° C., cst: 1.39
Cloud point, °C.: -24
Pour point, °C.: -27
Wax, wt %: 2.0
Total nitrogen, ppm (wt): 65.00
Basic nitrogen, wt %: 31
Acidity, mg KOH/g: 1.0600
Smoke point, mm: 16
Freezing point, °C.: -21
Cetane index (ASTM D4737-90): 49.4
Refractive index at 70° C.: 1.4567
Aromatics, vol %: 30.09
Aromatics, wt %: 34.0
Naphthalenes, vol %: 8.7
342-369° C.
Yield on crude, wt %: 4.420
Yield on crude, vol %: 4.42
Density at 15° C., kg/l.: 0.8926
Total sulfur, wt %: 0.727
Vis. at 50° C., cst: 9.02
Vis. at 100° C., cst: 2.90
Cloud point, °C.: 5
Pour point, °C.: 5
Wax, wt %: 10.9
Total nitrogen, ppm (wt): 394.00
Basic nitrogen, wt %: 124
Acidity, mg KOH/g: 0.9260
Aniline point, °C.: 71.3
Cetane index (ASTM D4737-90): 54.6
Refractive index at 70° C.: 1.4762
369-509° C.
Yield on crude, wt %: 21.982
Yield on crude, vol %: 21.10
Density at 15° C., kg/l.: 0.9292
Total sulfur, wt %: 0.870
Vis. at 60° C., cst: 28.80
Vis. at 100° C., cst: 8.06
Pour point, °C.: 29
Wax, wt %: 11.0
Total nitrogen, ppm (wt): 1,210.00
Basic nitrogen, wt %: 395
Acidity, mg KOH/g: 0.4870
Carbon residue, wt %: 0.163
Asphaltenes wt %: 0.0119
Aniline point, °C.: 77.5
Refractive index at 70° C.: 1.4964
509-550° C.
Yield on crude, wt %: 5.655
Yield on crude, vol %: 5.28
Density at 15° C., kg/l.: 0.9544
Total sulfur, wt %: 1.180
Vis. at 60° C., cst: 220.00
Vis. at 100° C., cst: 32.60
Wax, wt %: 10.1
Total nitrogen, ppm (wt): 2,670.00
Basic nitrogen, wt %: 739
Acidity, mg KOH/g: 0.4070
Carbon residue, wt %: 2.190
Asphaltenes, wt %: 0.2700
Aniline point, °C.: 82.5
Refractive index at 70° C.: 1.5145
550-585° C.
Yield on crude, wt %: 4.525
Yield on crude, vol %: 4.17
Density at 15° C., kg/l.: 0.9670
Total sulfur, wt %: 1.290
Vis. at 60° C., cst: 648.00
Vis. at 100° C., cst: 69.30
Wax, wt %: 11.2
Total nitrogen, ppm (wt): 3,460.00
Basic nitrogen, wt %: 908
Acidity, mg KOH/g: 0.2570
Carbon residue, wt %: 4.620
Asphaltenes, wt %: 0.7310
Aniline point, °C.: 84.1
