Usan crude oil is produced in Nigeria. Usan is a medium gravity, low sulfur crude oil produced in deep water off the coast of Nigeria, approximately 62 miles south of Port Harcourt. It is loaded from the Exxon-operated Usan FPSO, which can accommodate Very Large Crude Carrier (VLCC) vessels. The typical cargo size is one million barrels, but alternate cargo sizes can be arranged with advance planning. The minimum cargo size is 500 thousand barrels. Chevron holds a 30% non-operated working interest in the Usan Project in OML 138.

Whole Crude Properties *

Property Measured
Gravity, API° 29.90
Gravity SG 0.88
Sulfur, wt% 0.26
Total Nitrogen, ppm 2064.88
Acid Number, mg KOH/g 1.10
Pour Point, °C -44.98
Charact. Factor (K-FACTOR) 11.65
Viscosity, cSt at 40°C (104°F) 10.06
Viscosity, cSt at 50°C (122°F) 8.50
Vanadium, ppm 2.30
Nickel, ppm 13.15
MCR, wt% 3.12
Ramsbottom Carbon, wt% 2.76
Asphaltenes, (H.C7) wt% 0.06


* Disclaimer

While we believe that this assay is representative of the expected commercial crude, it does not guarantee production quality, and users are solely responsible for their use of the assay. No warranties are given regarding the assay accuracy or any results from its use. Chevron does not warrant or make any representations regarding the use or the results of the use of the foregoing opinion, information or data in this site in terms of their correctness, accuracy, results, use, quality, reliability, or otherwise.

Usan Assay Data

The following links provide you with assay data tables (disclaimer) for various properties across a standard set of cuts, as well as a distillation summary in °F and °C.

This is only a partial assay, if you require further data please contact us.

If you have trouble downloading or viewing the data, please contact us for the information in a preferred format.