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2017-06-25 11:53 |
SPE 工程师的油藏考试题，请大家帮着解解
An oil reservoir was originally undersaturated and was known to have no water influx.
The field is to be waterflooded and part of the preflood strategy is to determine the new bubble point for this state of depletion.
The initial reservoir pressure is 3,000 psia (20,684 KPa) with an initial oil saturation; Soi = 0.90.
The abandonment pressure is 1,200 psia (8,274 KPa).
At the abandonment pressure the oil formation volume factor is 1.20.
Cumulative oil production to the bubble point is 250,000 stb (39,750 m3).
Using the above production information and saturations, assume Bob = 1.460 rb/stb (res m3/m3) and the Boi = 1.441 rb/stb (res m3/m3) and that rock and water expansion are negligible.
What is the new bubble point solution gas oil ratio, scf/stb (res m3/m3), that would be indicated by increasing the reservoir pressure with water injection such that all the free gas was driven back into the solution.
A. 465 ( 83)
B. 512 (91)
C. 816 ( 145)
D. 935 (166 )
麻烦学霸们帮我看看，我自己解不出来
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