• heavy oil
    Petroleum - English

    Heavy Oil Recovery

        American Petroleum Institute API classifies crude oil into different types as follows: 1. Light Crude Oil : its API is greater than 31.1° 2. Medium Crude Oil: its API is between 22.3° and 30.2°. 3. Heavy Crude Oil: its API is between 22.3° and 10°. heavy crude oil has a high viscosity, high density. and the heavy oil itself is classified into many types according to the Canadian Center for Energy according to its API as follows: 1. Heavy oil: which API is more than 10° and viscosity is less than 10,000 cp , and flows under reservoir conditions. 2. Extra Heavy Oil: which API is less than…

  • heavy oil
    Petroleum - English

    what Heavy Oil, tar and bitumen mean

            Heavy oil is a type of petroleum that is different from conventional  petroleum insofar as they are much more difficult to recover from the subsurface reservoir. Heavy oil, particularly heavy oil formed by biodegradation of organic deposits, are found in shallow reservoirs, formed by unconsolidated sands. This characteristic, which brings about difficulties during well drilling and completion operations, may become a production advantage due to higher permeability. Heavy oil has a much higher viscosity (and lower API gravity) than conventional petroleum, and recovery of these petroleum types usually requires thermal stimulation of the reservoir. When petroleum occurs in a reservoir that allows the crude material to be recovered by pumping operations as a free-flowing…