What is meant by crude assay?
A crude oil assay is the chemical evaluation of crude oil feedstocks by petroleum testing laboratories. Each crude oil type has unique molecular and chemical characteristics. Information obtained from the petroleum assay is used for detailed refinery engineering and client marketing purposes.
Which is testing method of crude oil and petroleum product?
The ASTM D2892 test method is used for the distillation of stabilized crude to a final cut temperature of up to 400ºC (752ºF) Atmospheric Equivalent Temperature (AET). The crude oil is heated and separated by the distillation column into lighter products such as; gasoline, kerosene, naphtha, etc.
What is crude assay management?
The only system to enable Enterprise Crude Knowledge Management – easily maintain, improve, and distribute crude oil insight across broad user groups. Overview.
What is API gravity in crude oil?
API gravity is measured as the inverse of the density of a petroleum liquid relative to water. The higher the API gravity, the lower the density of the petroleum liquid, so light oils have high API gravities.
What are the types of crude oil?
Types of Crude Oil
- Class A: Light, Volatile Oils. These oils are:
- Class B: Non-Sticky Oils. These oils have a waxy or oily feel.
- Class C: Heavy, Sticky Oils. Class C oils are characteristically:
- Class D: Nonfluid Oils. Class D oils are:
How do you identify crude oil?
Crude oils are customarily characterized by the type of hydrocarbon compound that is most prevalent in them: paraffins, naphthenes, and aromatics. Paraffins are the most common hydrocarbons in crude oil; certain liquid paraffins are the major constituents of gasoline (petrol) and are therefore highly valued.
What is ASTM test method?
ASTM test methods are petroleum industry standards, accepted worldwide for quality and reliability. ASTM test methods for petroleum and refined products include: Petroleum and Petrochemical Test Directory. ASTM Tests for Petroleum, Fuels and Petrochemicals.
What is crude oil characterization?
Crude characterization also provides data in the analysis of geochemistry of the source of origin. Crude oil characterization by optical methods is usually difficult because of its dark color; however, those characterizations are crucial because they give information that can affect some analysis procedures.
What is Watson characterization factor?
Also known as: K factor, Watson factor, Kw, UOP characterization factor. The characterization factor is a measure of the aromaticity/paraffinicity of a crude oil or of a crude oil fraction. The Watson K factor will range from less than 10 for highly aromatic hydrocarbons and almost 15 for highly paraffinic hydrocarbons …
Is higher API oil better?
Higher API indicates a lighter (lower density) crude. Lower API indicates a heavier (more dense) crude. Generally, lighter (high API) crudes are more valuable because they yield more high-value light products when run through a refinery.