Problem 1. NG, SG 0.70 through ½" choke at 500 psig, 140 dF. 2,900 MCF/day is closest to: (A) 20% high (B) 10% high (C) Accurate (D) 10% low.
This solution is shown in the Guidebook 8 FAC 1-2. At said conditions, z = ~0.95 (find using 9 PVT 2 with preferred z chart; the Guidebook walks one through the psuedocritcal calculations).
Once you have z, flow computes to 2,900 MCF/day or (C). Note the Guidebook comment how estimating z = 1 gets you close, but this problem demands an exact answer, so you can't risk estimating.
Showing posts with label PVT. Show all posts
Showing posts with label PVT. Show all posts
Saturday, November 2, 2019
Monday, May 20, 2019
Gaseous Equivalent: 2018 #14
Problem 14. A 50 API retrograde gas-condensate reservoir at 2,500 psia & 225 dF has a gaseous equivalent (scf) closest to:
(A) 720
(B) 770
(C) 820
(D) 870?
Straightforward 3-step solution; 13 RES 11 has all needed equations on a single page:
1. Mo = 5954/(api-8.8) = 145.
2. SGo=(1.008*145)/(42.43 + 145) = 0.78.
3. 133,300(0.78/145) = 719 or (A).
Note this problem is more wordy and confusing than is shown above; for the answer here I merely remove all the unneeded information for clarity. But I strongly recommend doing these practice problems in test format. Practicing the confusing nature of problem wording, under time constraint, is critical.
Straightforward 3-step solution; 13 RES 11 has all needed equations on a single page:
1. Mo = 5954/(api-8.8) = 145.
2. SGo=(1.008*145)/(42.43 + 145) = 0.78.
3. 133,300(0.78/145) = 719 or (A).
Note this problem is more wordy and confusing than is shown above; for the answer here I merely remove all the unneeded information for clarity. But I strongly recommend doing these practice problems in test format. Practicing the confusing nature of problem wording, under time constraint, is critical.
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