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  2. API gravity - Wikipedia

    en.wikipedia.org/wiki/API_gravity

    The specific gravity is defined by the formula below. ... Medium oil has an API gravity between 22.3 and 31.1° (i.e., 870 to 920 kg/m 3)

  3. Light crude oil - Wikipedia

    en.wikipedia.org/wiki/Light_crude_oil

    The clear cut definition of light and heavy crude varies because the classification is based more on practical grounds than theoretical. The New York Mercantile Exchange (NYMEX) defines light crude oil for domestic U.S. oil as having an API gravity between 37° API (840 kg/m 3) and 42° API (816 kg/m 3), while it defines light crude oil for non-U.S. oil as being between 32° API (865 kg/m 3 ...

  4. Volume correction factor - Wikipedia

    en.wikipedia.org/wiki/Volume_Correction_Factor

    The formula for Volume Correction Factor is commonly defined as: ... Crude Oil. e.g. Most Crude. 341.0957: ... Since API gravity is an inverse measure of a liquid's ...

  5. Petroleum geochemistry - Wikipedia

    en.wikipedia.org/wiki/Petroleum_geochemistry

    The API gravity of a crude oil is a measurement of purity - i.e., ... and are represented by the formula C n H 2n+2, where n is a positive integer. [12] Naphthenes

  6. Heavy crude oil - Wikipedia

    en.wikipedia.org/wiki/Heavy_crude_oil

    Heavy crude oil (or extra heavy crude oil) is highly viscous oil that cannot easily flow from production wells under normal reservoir conditions. [1] It is referred to as "heavy" because its density or specific gravity is higher than that of light crude oil. Heavy crude oil has been defined as any liquid petroleum with an API gravity less than ...

  7. Naphthenic oil - Wikipedia

    en.wikipedia.org/wiki/Naphthenic_oil

    Thus, the API gravity or specific gravity is widely used for the classification of crude oils, based on a scheme proposed by the American Petroleum Institute (Table 1). A high API value >30 means a light crude with paraffinic character; a low API value means a heavy crude with increasing aromatic character. Table 1.

  8. List of crude oil products - Wikipedia

    en.wikipedia.org/wiki/List_of_crude_oil_products

    The chemical profiles, or crude oil assays, specify important properties such as the oil's API gravity. The delivery locations are usually sea ports close to the oil fields from which the crude was obtained (and new fields are constantly being explored), and the pricing is usually quoted based on FOB ( free on board , without consideration of ...

  9. Stock tank oil - Wikipedia

    en.wikipedia.org/wiki/Stock_Tank_Oil

    Crude oil is a complex mixture of many individual compounds which influence the physical properties of the oil, such as its density (API gravity), viscosity, Permeability, Dew point, Formation Volume, etc.. The properties also influence how the oil is classified and its value. [1]