permanent downhole i distrubuted fiber optic monitoring i%%pti-intl.net/completion/53.pdf · flow...
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PermanentDownhole
Distrubuted FiberI
I%%Optic Monitoring
DT5 Monitoring Applications•
Flow Rate Measurement•
Water Injection/Breakthrough Monitoring•
Vacuum Insulated Tubing MonitoringGas Production
•
Water Production•
Low Flow Rate Measurement•
Flow Behind Casing•
Gas Lift Valves9 Steam Flood•
SAGD•
Inter Well Connectivity;~ Chemical Injection Monitoring
2
qqW
Confidentiz
Havantages or upticai sensorsEkk
No down-hole electronics•
Immune to shock/vibration andelectromagnetic interference•
igh reliability•
igh temperature performance >300 Deg C•
Extremely small <500m - easily deployed•
Point and distributed sensorsMultiplexing capabilities
3
idential
Distributed Temperature Installation OptionsSingle Ended
Double Ended
Check Valve
4
91111111111
UIL
MR
SE
DE
0.2 C Resolution 0 .15 C
0.5 C Accuracy 0.25 CTypical performance based upon a 20minute measurement period
reservoir z)urveiiiance basicsDrilling infill wells and sidetracks canincrease your recoverable reservesThe average well has some form ofreservoir surveillance performed on it lessthan once every two years
Reservoir surveillance is key tounderstanding the performance of yourreservoir
optimum placement of infill and sidetrackwells -information on single well performance
6
lronti n uous i"ceservoi iSurveillance
r Shifts the major cost of surveillance from OPEXto CAPEX (very small proportion of CAPEX)
Provides data in real time - without a 2 year wait(events can be observed as they happen - and animmediate response taken)
> No well intervention required (safety, no loss ofproduction)
Reliability of electrical sensors has been themajor drawback so far (they need to last 5+ years)
7
50
45
vvaLVr injectivnioreaKinrvugnMonitoring
0 400 800Depth (m)
maenuai
1200 1600
WarmbaInjection
k
Geothermal.
gradient Turn around sub
ar0a~ 40LYCt
35Q.E01-- 30
25
Measured vs Predicted Temperatures
75
U
a G5
W
3n
Q. 55EwF-
452700 3200 3700
Depth (m)
02700
GeothermalThermal modelPorosityTernperature
Geothermal Gradient
4200
Largeinflow at theheel of the -r well
Water flow
Total flow
Waterproduction at -
the toe
wE30
w
0.0
3200 4200Depth im
Perforations
9
9500
Monitoring Gas Wells2 .59MMscfd 9.55M Mscfd
Geothermal -40 Deg F Calculated 9.5MMscfd Flow Calculated 2.5MMscfd Flow Gamma Ray
10000
10500Depth (ft)
nfidential
1000
Boo
0
11000
200
350
340La1
330L
y 320QEWH 310
300
10
Steamflood Observation Wells400
LLD) 3000
0 400 800
Depth (ft)
ifidentii
Measurements over time
1200 1600
Steamflood Injectors/Producers
11 ifidentii
500
475
450
425
400
375
350
325
300
275
250 I'~
ii ~p225 V
200
175 j
150 h
125
100
75
0
100
200
300
400
500
600
700
800
900
1 2
0
90 -
180 -
270 -
360 -
450 -
. . . . . . . . . . .
540 -
Undisturbed* Steam 10 min
Steam 30 minSteam 75 min
•
Steam 140 min•
Steam 24 hrs
+
I .
900
I
I
I0.0
100.0
200.0
300.0
400.0
500.0Temperature (deg F)
500450
IM 400CL) 350
„ 300250
;5 200
a 150E 100F- 50
00
Confidenti ;
oaeiiing
Temperature into formation
ERNE
RuMIN1 '14 ∎ ~`
i I i i i-101411rrtes-30lnrrtes-75 tvinrrtes-140 tvinrrtes-24 His
5 10
Depth (ft)Is 20
1 3
SAGD Production
Steam InjectionPeriod
220210200190180170
150140130120110100908
,C,5
198n
-VO 'I 1
00CD C,4Q T
~fN T
~'
T
o
Depth
d
R0)mCEa)H
∎ 210-220
o200-210
o190-200
0180-190
0170-180
0160-170
0150-160
• 140-150
• 130-140
o120-130
• 110-120
0100-110
• 90-100
080-90
o70-80
• 60-70
050-60