Page 70 - Petroleum and Gas Field Processing

Table 2 Properties of Some Reference Crude Oils
Arabian Arun Beryl Nigerian SJV
Property light indonesia N.S light Calif.

API (gravity) 33.9 54.1 36.5 37.6 15.2

Pour Point ( F) 45 55 20 5 5
CCR (wt%) 3.6 0.01 1.3 1.1 7.0
Sulfur (wt%) 1.8 > 0.1 0.42 0.13 1.05
Nitrogen (ppm) 60 50 880 0.06 6200
Nickel (ppm) 3 0.65 0.8 3.6 63
Vanadium (ppm) 19 0.15 3.7 0.3 60
Salt Content (PTB) 10 3 7.4 5 14

Table 3 Fractions Obtained from Arabian Crude
Percent No. of carbon Boiling range

Fractions yield atoms in molecule ( F)
Gases (dry/wet) 2 1–2 260 to 130 dry
3–4 55 to 30 wet
Naphtha 20–26 5–12 90–360
Kerosene 7–12 10–15 320–460
Diesel oil 10–14 12–20 400–600
Wax distillate 15–20 17–22 500–700
Residuum 35–40 20–90 600þ

Another method of classification is the following:

1. Parafinic base
2. Mixed base
3. Naphthenic base

Based on this classification, a rating for the processing of crude oils is
envisaged as follows for the production of certain products and their
treatment:
Treatment of
Products: Lub. oil Asphalt Gasoline products
Type of oil:
Parafinic 1 3 3 1
Mixed 2 2 2 2
Naphthenic 3 1 1 3

Rating: 1. Excellent; 2. good; 3. poor.

Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.