dual gas lift continuous flow (ipo) valves offshore west africa well x-1 (long) and x-1d (short)
DESCRIPTION
Dual Gas Lift Continuous Flow (IPO) Valves Offshore West Africa Well X-1 (long) and X-1D (short). RCF Series - IPO Valves for Continuous Flow. Special IPO gas lift valves for continuous flow (R-1CF & RCF-2) used in redesign of well, X-1 - PowerPoint PPT PresentationTRANSCRIPT
© 2001 Weatherford. All rights reserved.
Dual Gas LiftDual Gas LiftContinuous Flow (IPO) Continuous Flow (IPO)
ValvesValves
Offshore West AfricaOffshore West Africa
Well X-1 (long) and X-1D (short)Well X-1 (long) and X-1D (short)
Dual Gas LiftDual Gas LiftContinuous Flow (IPO) Continuous Flow (IPO)
ValvesValves
Offshore West AfricaOffshore West Africa
Well X-1 (long) and X-1D (short)Well X-1 (long) and X-1D (short)
© 2001 Weatherford. All rights reserved.
Special IPO gas lift valves for continuous flow (R-1CF & RCF-2) used in redesign of well, X-1
RCF series valves are simply IPO valves with gas chokes positioned upstream of valve port or seat
Valve configuration maintains tubing sensitivity after valve is in open position
RCF Series - IPO Valves for Continuous Flow
Orig. PBTD: 6926 ft TD: 6968 ft
9 5/8” 47 # Csg L-80 @ 6968 ft
20”131#, X-56’ Csg
@ 374’
13 3/8“, 72# L-80 Csg @ 1750’
XN 2.205
9 5/8” Baker FHL Pkr @ 6038’
X 2.313
2 7/8” Otis XN-L Nip @ 6089’
2 7/8” Otis X-L Nip @ 6078’
XN 2.635
X 2.75
X 2.313 2 7/8” Otis X- L Nip @ 6025’
X 2.313
X 2.313
X 2.75
X 2.75
3 1/2 Otis X L Nip @ 5612
3 1/2 Otis XN-L Nip @ 5619
SS EOT @ 5629
3-1/2 9.3# L80 CSH
2 7/8 6.5 # L80 CSH
9 5/8” Baker T2-DSR Pkr @ 5591’
3 1/2 Otis X Lnip @ 5580’
Perf’d Pup Jt @ 5613
3 1/2 Otis X @ 1001’
3 1/2” SCSSV @ 496’
2 7/8” Otis X L Nip @ 5576’
EOT @ 6099’
New PBTD @ 6884’ Wlm on-5-Nov-99
Formation Tops W/ Pay MD TVDss 4523’ -4164’ 4740’ -4365’ 4946’ -4555’ 5595’ -5155’ 5640’ -5197’ 6188’ -5703’ 6659’ -6137’ 6830’ -6294’
LONG STRING – 2-7/8” MD TVD SSSCSSV 521’ 428’N-Nip 998’ 928’GLM #11 1437’ 1311’GLM #10 2099’ 1925’GLM #09 2576’ 2366’ GLM #08 2958’ 2720’GLM #07 3342’ 3075’GLM #06 3722’ 3425’ GLM #05 4041‘ 3719’GLM #04 4359’ 4013’GLM #03 4709’ 4336’GLM #02 5029’ 4632’GLM #01 5349’ 4928’ 2 7/8” X-LN 5576’ 5138’9 5/8” U-Pkr Ext 5588’ 5149’9 5/8” 51.B Pkr 5591’ 5152’9 5/8” L-Pkr Ext 5596’ 5156’Blast Jts 5661’ 5216’2 7/8” X-LN 6025’ 5552’9 5/8” FHL Pkr 6038’ 5564’2 7/8” X-LNp 6078’ 5601’Perf Pup Jt 6079’ 5602’ 2 7/8” XN-LNp 6089’ 5611’ EOT 6099’ 5621’
2 7/8” 6.50 #, L-80 CSH Tubing
Orig. KB TH 59’Curr. KBTH 59’
Orig. KB Elev. 91’(Above Sea Level)
Jkt
TVDSS 6422 ft @ 6968 ’ TD
WLM ZeroKOP @260’ MD
Directional WellMax Angle 23 deg @ 6694 ft
SHORT STRING – 3-1/2”MD TVDss
SCSSV 496’ 404’X-LNp 1001’ 902’GLM #11 1406’ 1282’GLM #10 2064’ 1892’GLM #09 2566’ 2357’GLM #08 2944’ 2707’GLM #07 3322’ 3056’GLM #06 3702’ 3407’GLM #05 4020’ 3700’GLM #04 4338’ 3993’GLM #03 4687’ 4316’GLM #02 5004’ 4609’GLM #01 5321’ 4902’3 1/2” X-LNp 5580’ 5141’9 5/8” U-Pkr Ext 5591’ 5152’9 5/8” 51.B Pkr 5591’ 5152’9 5/8” L-Pkr Ext 5597’ 5157’3 1/2” X-LNp 5612’ 5171’Perf Pup Jt 5613’ 5172’3 1/2” XN-LNp 5619’ 5177’EOT 5629’ 5187’
© 2001 Weatherford. All rights reserved.
Well X1 (Dual) History
Well completed as common annulus dual; G/L mandrels contained dummy valves; both wells came in flowing naturally
Waterflood injection initiated into reservoirs
Due to increasing water cut and declining production, R-2 IPO valves were installed in 3.5” short string; valves were designed for 800 psi KO, 750 psi OP
Due to increasing water cut and declining production, R-1CF IPO valves were installed in 2-7/8” long string; valves were designed for 750 psi OP
July 1996July 1996
June 1998June 1998
Sept. 1998Sept. 1998
Mar. 2000Mar. 2000
© 2001 Weatherford. All rights reserved.
Sept 1998 – R-2 IPO gas lift valves installed for unloading and gas lift operation, if required
Recorded SBHP = 1600 psi (26 Sept 98)
PI = 3.35 B/D/psiPI = 3.35 B/D/psiBHT = 165 deg FBHT = 165 deg F
Design Rate = 2000 B/DDesign Rate = 2000 B/D%WC = 80%%WC = 80%
GL Pressure = 800 psiGL Pressure = 800 psi
X-1D (short)X-1D (short)
© 2001 Weatherford. All rights reserved.
High lift gas usage to both strings and production decline from short string prompted re-design of both strings; higher available gas lift pressure supply of 1150 psi allowed both strings to be designed for PSO pressure of 1050 psi
R-1CF and R-2CF continuous flow valves were installed by slick-line
Tests showed lift gas reduction in both strings, with oil increase of 560 barrels from short string
Well X-1 (Dual) History
Jan. 2002Jan. 2002
Feb. 2002Feb. 2002
Feb. 2002Feb. 2002
© 2001 Weatherford. All rights reserved.
After GLV redesign and installation, well producing 1,750 bfpd with Qi = 500 mcfpd and lifting from GLV depth (4104 ft TVD)
X-1 (Long)X-1 (Long)
© 2001 Weatherford. All rights reserved.
Jan 2002 – redesign with RCF-2 valves for 1050 psi Operating Pressure
X-1D (short)X-1D (short)
BFPD = BFPD = 2500 [+1000 bfpd]2500 [+1000 bfpd]
Qi = 750 Mcfpd Qi = 750 Mcfpd [-500 Mcfpd][-500 Mcfpd]
Injection Depth = Injection Depth = 4993’ TVD4993’ TVD
© 2001 Weatherford. All rights reserved.
Well Test Data X-1
© 2001 Weatherford. All rights reserved.
Well X-1D (SS)
0
500
1000
1500
2000
2500
3000
10/12/2001
11/12/2001
12/12/2001
1/12/2002
2/12/2002
3/12/2002
4/12/2002
5/12/2002
6/12/2002
7/12/2002
8/12/2002
9/12/2002
10/12/2002
BL
PD
0
1000
2000
3000
4000
MC
FD
BOPD BFPD MCFDP MCFDI
Well Test Data – X-1D
© 2001 Weatherford. All rights reserved.
X-1 GLV Installation
© 2001 Weatherford. All rights reserved.
X-1D GLV Installation
© 2001 Weatherford. All rights reserved.
R-1CF & RCF-2 gas lift valves allow GL designer to maintain higher injection pressure, thus deeper injection depth
Different Injection Depths for each tubing string - 3516’ TVD for X-1 and 4993’ TVD for X-1D
X-1 - increase in fluid rate by 10%
X-1D - increase in fluid rate by 65%
Combined (Qi) gas injection rate was reduced by 25%
Combined oil gain was 560 bopd
X-1 Results
© 2001 Weatherford. All rights reserved.
Dual Gas LiftContinuous Flow
(IPO) Valves
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