Crude oil in the reservoir almost always mixed with lighter hydrocarbons such as Methane, ethane, etc, that are released when oil is flashed at lower pressure. As the gas evolves, the liquid volume decreases; this phenomenon is know as shrinkage. Gas produced is called solution or associated or separated gas. Shrinkage is expressed in terms of volume of stock tank oil per volume of reservoir fluid (shrinkage factor, SF).
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asked Aug 5, 2014 in Process by keler01 (1,380 points)
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