Page 416 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2

383 Production

A constant volume depletion study is also performed on the reservoir fluid.
The produced compositions and volumes from the depletion study are used
in conjunction with equilibrium constants to calculate cumulative STO and
separator gas recoveries resulting from conventional field separation. Gas plant
products in both the primary separator gas and the full well stresses should also
be reported.

Sampling b1dltlOn8
Date sampled (on 20/64 choke) 060894 for 1,330 hr
Tubing pressure, flowing 9,960 psis
Primary separator temperature 95OF
Primary separator pressure 9oo wig
Primary separator gas rate (Table 6-3) 2,229.7 MCFlday
Liquid rate (2nd stage 0 50 psig) 396 bbllday
GdQlfid ratio (GOR) 5,631 SCF 1st stg. gadbbI50 Ib liq.

Shrinkage factor
(vol. 50 Ib iiq./vol. sep. liq.) 0.81 08

Gashiquid ratio (GOR) 4,565 SCF 1st stg. gal 900 Ib liq.

Shrinkage factor
(vol. S.T. liq./vol. sep. liq.)
through 50-lb 2nd stage 0.7445

Pressure base 15.025 Dsia 0 60°F

Table 6-3
Calculation of Gas Rate [11]
~
= 165.6804 Hw = 30.0 "H20, Pf = 915.00 psla
Fb = 455.0300 D = 5.761 ' , d = 1.50 "
Fpb = 0.9804 15.025 psia
Fr = 1.0002 b = 0.0367
Y2 = 1.0002 HwlPf = 0.033, dR1 = 0.260
Fg = I/--
Fg = 1.1953 Gravity = 0.6999 , Ftf = 4-
Ftf = 0.9680 Temp. = 95 degrees F,
= 1.0859 pTr' = 1.441 , pPr' = 1.372
FPV
z = 0.8480 , FPV = @
Acid Gas Correction Factor Epsllon = 3.57
Q = dHw ff x Fb x Fpb x Fr x Y2 x Fg x Ftf x Fpv x 24
Q = 2229.7 MCF/day 0 15.025 PSlA 0 60 Degrees F