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1. A newly discovered volumetric undersaturated oil reservoir has an initial pressure of 3800 psia. Initial estimate for the oil in place is 180106STB. The
1. A newly discovered volumetric undersaturated oil reservoir has an initial pressure of 3800 psia. Initial estimate for the oil in place is 180106STB. The abandonment pressure for the oil field is around 1200 psia. Labaratory analysis of the crude oil shows a bubble point pressure of less than 1100 psia. Average isothermal compressibility of the oil is 151061/psi. Estimate (a) how much oil will be produced by depletion drive and, (b) what will be the recovery factor for this field considering the only mechanism is the oil expansion (the field will be produced down to the abandonment pressure). 2. If there is an overlying gas cap with a volume of 21106STB(Cg=4001061/psi) repeat the above calculations. Assume that no gas cap gas is produced. 3. If there is an aquifer with a volume of 800106 STB instead of a gas cap ( Cw=81061/psi) what would be the production and the recovery factor. Assume that no water is produced along with the oil. (In all cases you should omit the rock expansion!)
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