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Solution gas oil ratio
The solution gas-oil ratio (GOR) is the amount of gas dissolved in the oil. Heavy oils (lower API gravity)contain less dissolved gas than lighter oils. Solution GOR can range from 0 to approximately 2000 scf / bbl. For most purposes, the solution GOR at the bubblepoint is the value of interest. Past the bubblepoint, the gas begins to come out of solution and form free gas, and the oil is said to be undersaturated.
Solution GOR is determined by rearranging the equations for calculating bubblepoint pressure as discussed on the page Oil bubblepoint pressure.
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