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Unformatted text preview: Who‘n : E’____/___ Name: ou ID: Qa/inak Kur‘k
T Pr PE 3513001
February 24, 2011 Quiz 1 (30 points) Question 1
Complete the following list indicating the four major subjects in reservoir engineering:
(5 points) a. How much oil and gas was there to start with? b. How much of it can I get? 0. 7 How Cam Tia—i bli’ d. How can I get more? 0'? rt Co deg > Question 2 Consider the Havlena and Odeh material balance equation given below for a black oil 4 0“ reservoir.
. F = NEO + N(1+m)BﬂEf,w + [NmB’leg + We } water 5/4190
Mihclnmhin W \W 38"
01L ‘itm’amoivo‘n amok, W
epvmn 91533 Wader E’V‘YW’KIO‘A 304$ €¥Pamg43n a. Identify each term in the equation above. (5 points) b. Assume that the reservoir pressure and production data is available. Using a
graphical approach, explain how original oil inplace can be determined for a no
waterinﬂux and saturated oil reservoir. You may also assume that the formation
and water compressibility effects are negligible during the production. (10 points) Quin D No wai‘retuﬁsflux we :0 z) gadUml’eol 612 reserv‘oir Cm $0)
we, \nove, 5&5 Ca? . F Fm'ci oﬁgx «'61.. 071. \v“ ﬂack. 7
Hem/\an WOL 00m“ 0 0 £0 + .  (b
P = NEO+ MHV/ELEJIN +<Ng54s€ Ea Ivy/cf &‘
F r a" Question 3 Estimate the percent change in recovery if the reservoir below is under full water drive. (10 points)
pressure 3250 2500
psi
Bg x103 5.33 6.67 3.623
cu ftfscf voiumetric recovery: Cav‘tn (5 50.92, G) aecmma go“ New $1:va
3w: :— 01; M3 :0 C {NBwC mmienamg \9 wad—ex 098%)
g ( o 034 6
13¢ ’3 4 I ‘17 . '1 FM 7“ CW” 1"?“ a? 5 “i/V %‘ 4 1~ Ev 2 $5: ci'gm'
NCONJB “\W " ﬂ‘ Make: eMwL I 35” 1—31” 74325 PE 3513002 Name: 5 z3/ U14, “L, Feb 24, 2011 OU ID: gee, lmofn j: Quiz 1 (30 points) 1: A
Question 1 Complete the following list indicating the four major subjects in reservoir engineering
(10 points) a. How much oil and gas was there to start with? b. ? How Mud“ QL‘tl' ComX. ‘1 c. How fast can I get it? (1. ? How Can I WGPQ ﬂ Question 2 Consider the conceptual volumetric natural gas reservoir we earlier discussed during Exercise 3 in
the classroom: p,=3000psi ¢=0.1
.Sm=0.3 T=145°F Assume that we can consider the natural gas as ideal gas under the reservoir conditions. Find out
what would be the average reservoir pressure change in per cent for the operating company to
recover 80% of the original gas in place. (10 points) we, know Wax“ ‘ a 1 pk ‘ Vcc‘owjﬂ, :5 tummy. fﬂssw—L
£= ‘ ‘“
2x '7. 1.’ F“ 5: $000,600 = 0‘ 8’
E5“ 0‘9 = v is P; 3"”
3000
5 = 002%20t ET; Pq :: goo {>54 y. d/Aowym (Wewéki’mxsuvt 13,
____,____——L—— ‘ Pv 19297.\
97> 01 1
6 P Tdkwawg %=l Question 2 A dry natural gas producing formation has uniform thickness of 30.0 ft, porosity of 15.0%, and
connate water saturation of 25.0%. zfactor is 0.85 at the initial reservoir pressure of 4,450.0 psia
and reservoir temperature of l75.0°F. A group of wells have been completed in this formation.
How many ears ill it take for the wells to deplete 80.0% of a 640.0 acre unit at the total rate of 10.0 MM SC day? (10 points)
Cam pr:er ACNI¢=0457M>30£¥)’FFZQHSD Psiﬁx ﬂ, 3"“; = 032? 1—7;: WSW: /% $0.§§ N0 \ﬂ‘f‘ow s 0.80 Ga 2 43%0 M¢C’“5W‘)
5 .
B 09“
a; = 0.02924 %‘,T"
ﬁ.
(9 f> 6 292
; =5 .0 g (0.8;) (14§+%0) : 0.00%Q’3t wﬂ
a 4490 0
(9 Q; a esssoceﬁoxsot’r)04504157 a 2:142 HO‘ seaﬂ W «.— 2342 7‘10? ﬁll/0.3ch L”
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3 210867409 MHMLL ® “— Q—QQO‘UVPPB ’7 {:1wa : 70 JGI‘Wu.
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36; <90~$ )0 W50” aha? ...
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