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Transcript of Comparative Analysis of Production Method with PCP … · Comparative Analysis of Production Method...
Comparative Analysis of Production Method with PCP Systems at Rubiales Oil Field (Colombia)
SPE - 114191
C. A. Rubio – P. A. Agudelo: Weatherford Colombia LimitedJ. E. Peñaloza: Meta Petroleum Limited
Houston TX, April 2008 – SPE PCP Conference
Table of Contents
1. Objectives.2. General Context – Rubiales Oilfield.3. Typical Completions (PCP & ESP). 4. Historical Behavior of Oil Production.5. Operation Parameters and BS&W
Behavior (PCP & ESP).6. Comparison: RB-31(PCP) vs. RB-45 and
RB-47 (ESP). 7. Power Requirements ESP vs. PCP. 8. Conclusions.
Objectives
Compare artificial lift systems at Rubialesoilfield (PCP vs. ESP) into wells behavior.
Show the advantages and disadvantages that can offer each kind of artificial lift method.
Establish the best alternative to produce Rubiales oilfield ensuring the minimum bottom draw down and warranting stable production conditions. (BS&W).
General Context – Rubiales Oilfield
• Llanos Orientales Colombian Basin (Paleozoic – Upper Tertiary). South – East Region of the country.
• Average BS&W: 81%
• Oil Gravity (°API): 12,3 @ 60 °F
• Average Production Depth: 2500’ (762 m)
• 33 Production Wells, 9 with PCP Systems and 24 with ESP Systems.
Typical Completion PCP Production String
Drivehead with Electric Motor
Polished Rod
Sucker Rod String
Tubing String
Tubular PCP Stator and Rotor(5 Bbls/RPM/Day – 2200 psi)
Non Turn Anchor
Gravel Pack
Typical Completion ESP Production String
TUBING BONNET
MASTER VALVE.
PUMPING TEE
SWAB VALVE.
WING VALVE.
TREE CAP
VSD: SPEEDSTAR, 2000 TM, 390 KVA, NEMA 3R
6 PULSE, 460 V, CKT BREAKER R3A420KCB.
TRANSFORMER: 400 KVA, ABB, VBT=480 Volt.
VAT = 1102 - 3817 Volt. 3 a 90 Hz, 20 Taps
24 6 4-1/2" 11,6 #/FT P-110 BTC BLANK PIPE #REF! #REF! 79,30 5,00
25 1 X-OVER 5" BTC BOX x 4 1/2" LTC PIN #REF! #REF! 0,58 5,52
26 27 4 1/2" LTC MESH RITE 11,6 #/FT #REF! #REF! 887,33 5,20
27 1 X-OVER 4 1/2" LTC BOX x 4 1/2" BTC PIN #REF! #REF! 0,54 5,00
28 1 STINGER SEAL #REF! #REF! 0,97 5,00
29 1 JOINT 4 1/2" BTC 11,6 #/FT, P-110 #REF! #REF! 9,68 4,50
30 1 WASH DOWN SHOE #REF! #REF! 2,10 5,00
COMPLETION FLUID : FILTERED BRINE (KCl) DENSITY (PPG) : 8,5 PPGINTERVALS THICK (ft) SPF
3418' MD - 4392' MD > 46' TVD N.A
CSG # JTS DESCRIPTION SHOE (ft) COLLAR(ft) TOC (ft)9 5/8" 5 K-55, 36#, BTC, R-III 236 N.A SURFACE
7" 68 N-80, 23 lb/ft, R-II, BTC. 3400 3195
REMARKS : HORIZONTAL HOLE
3 * 3" LP.
3 1/8" x 3000 psi WP THREADED 3" LP
3 1/2" x 3 1/8" ACME- 3000 psi WP
3 1/8" x 3000 psi WP THREADED 3" LP
FEPCO
FEPCO
FEPCO
FEPCO
FORMATION GUN TYPEN.A
REV. BY: I. AREVALO
FEPCO
SBL-REDA
SBL-REDA
BASALES SANDS
FEPCO
7-1/16" x 3 1/8" - 3000 psi
3 1/8" x 3000 psi WP THREADED 3" LP
236' 9 5/8" CSG SHOE
RTE:16'
3400' 7" CSG SHOE
3390' QUANTUM PACKER
TD @ 4655'
4 1/2" LTC MESH RITE 11,6 #/FT FROM 3490 FT TO 4377 FT
Hanger
Tubing String
Drain Valve (Bleeder Valve)
Check Valve
Discharge Head
Pump (70 stages average, 1200 – 10.000 BFPD)
Intake
Motor
Multisensor Type “O”
Horizontal Well
Historical Behavior of Oil Production
RUBIALES HISTORICAL BEHAVIOR OF OIL PRODUCTION
0
5000
10000
15000
20000
25000
30000
35000
Ago
-200
4
Feb-
2005
Sep
-200
5
Mar
-200
6
Oct
-200
6
Abr
-200
7
Nov
-200
7
Jun-
2008
Time
Oil
Prod
uctio
n (B
OPD
) Production drop duemeteorologic contingence
Pareto Diagram – Oil Production
PARETO DIAGRAM - OIL PRODUCTION
0200400600800
1000120014001600180020002200240026002800300032003400360038004000
RB
-63
H
RB
-61
H
RB
-58
H
RB
-65
H
RB
-75
H
RB
-55
H
RB
-42H
RB
-62
H
RB
-54
H
RB
-67
H
RB
-64
H
RB
- 45
H
RB
-68
H
RB
- 48
H
RB
-60
H
RB
-57
H
RB
-59
H
RB
- 25
RB
-66
H
RB
-43D
RB
- 33
RB
- 04
RB
-79
RB
-51
H
RB
- 38
RB
- 41
RB
- 10
RB
- 31
RB
- 47
RB
- 39
RB
- 30
RB
- 37
RB
-44D
WELLS
BO
PD
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
PRODUCTION FORECAST RUBIALES OIL FIELD
29,292 BOPD
80% OIL PRODUCTION 23,197 BOPD
20% OIL PRODUCTION 6,095
PCP Systems Wells
Operation Parameters of PCP Systems Wells
RB-10 RB-30 RB-31 RB-33 RB-37 RB-38 RB-39 RB-41 RB-80Velocity (RPM) 190 130 60 255 92 220 205 200 70Torque (%) 67 35 95 76 93 69 33 67 18Middle Point of Perforations (feet) 2634 2630 2938 2657 2660 2657 2693 2621 2600Pump Intake Depth (feet) 2421 2403 2574 2393 2487 2440 2430 2426 2457Total Liquid Column (feet) 900 1787 234 804 218 1072 1816 1207 2188Depth of Level (feet) 1521 616 2340 1589 2269 1368 614 1219 269BFPD (Barrels of Fluid per Day) 1029 633 299 1244 422 1175 809 1047 257BS&W (%) 83 87 30 65 72 80 80 75 90BOPD (Barrels of Oil per Day) 175 82 209 435 118 235 162 262 26Volumetric Efficiency (%) 97 88 90 88 83 97 71 90 63PIP (psi) 384 762 100 343 93 457 775 515 933PWF (psi) 475 859 255 456 167 550 887 598 994
Rubiales 31 Well:
Since 2003
30% BS&W (average)
200 – 500 BFPD
BS&W Behavior – PCP Wells
BS&W BEHAVIOR - PCP WELLS RUBIALES OIL FIELD
0,00
20,00
40,00
60,00
80,00
100,00
120,00
28-Jun-03 14-Ene-04 01-Ago-04 17-Feb-05 05-Sep-05 24-Mar-06 10-Oct-06 28-Abr-07 14-Nov-07 01-Jun-08
Date
BSW
(%)
RB-30 RB-33 RB-37 RB-38 RB-41
Lineal tendency with asoft slope. Stableconditions along the time
RB-04 RB-025 RB-042H RB-043D RB-044D RB-045H RB-047 RB-048H RB-051 RB-054H RB-055H RB-057HFrecuency (Hz) 36 56 46 44 36 52 38 56 59 51 50 41
Total Liquid Column (feet) 1940 1291 2023 1083 381 2090 393 1455 309 1464 1641 961
Depth of Level (feet) 751 1244 927 2024 2870 1174 2038 1857 2101 1127 1462 2064BFPD (Barrels of Fluid per Day) 2614 4537 8600 4774 234 8844 282 7958 479 8160 9990 4952
BS&W (%) 88 85 84 84 71 88 42 89 32 85 84 86BOPD (Barrels of Oil per Day) 314 681 1376 764 68 1061 164 875 326 1224 1598 693
PIP (psi) 840 559 863 469 165 905 170 630 134 917 700 410
RB-058H RB-059H RB-060H RB-061H RB-062H RB-063H RB-064H RB-065H RB-066H RB-067H RB-068H RB-075HFrecuency (Hz) 55 43 37 44 44 42 38 45 39 39 38 39
Total Liquid Column (feet) 1166 1411 2218 1625 1686 1735 1873 1161 1222 1280 1734 1947
Depth of Level (feet) 1842 1731 639 1070 1110 1128 1088 1709 1634 1345 1056 853BFPD (Barrels of Fluid per Day) 7374 4508 5058 5171 7760 6416 7555 3450 2549 1966 2334 1685
BS&W (%) 65 83 84 46 82 39 84 43 81 27 55 14BOPD (Barrels of Oil per Day) 2581 766 809 2792 1397 3914 1209 1967 484 1435 1050 1449
PIP (psi) 505 602 946 693 719 740 799 495 521 546 740 830
Operation Parameters of ESP Systems Wells
Rubiales 45 Well: Since 2006
85% BS&W (average)
1000 BOPD
BS&W Behavior – ESP Wells
BS&W BEHAVIOR - ESP WELLS RUBIALES OIL FIELD
0,00
10,00
20,00
30,00
40,00
50,00
60,00
70,00
80,00
90,00
100,00
18-Ene-07 09-Mar-07 28-Abr-07 17-Jun-07 06-Ago-07 25-Sep-07 14-Nov-07 03-Ene-08 22-Feb-08
Date
BSW
(%)
RB-54H RB-60H RB-62H RB-64H
Strong slope inBS&W tendency
Comparison: BS&W Behavior –RB-31 and RB-45 Wells
BSW Behavior - RB-31 and RB-45 Wells
0,00
20,00
40,00
60,00
80,00
100,00
120,00
7-ag
o-03
16-s
ep-0
3
26-o
ct-0
3
5-di
c-03
14-e
ne-0
4
23-fe
b-04
3-ab
r-04
13-m
ay-0
4
22-ju
n-04
1-ag
o-04
10-s
ep-0
4
20-o
ct-0
4
29-n
ov-0
4
8-en
e-05
17-fe
b-05
29-m
ar-0
5
8-m
ay-0
5
17-ju
n-05
27-ju
l-05
5-se
p-05
15-o
ct-0
5
24-n
ov-0
5
3-en
e-06
12-fe
b-06
24-m
ar-0
6
3-m
ay-0
6
12-ju
n-06
22-ju
l-06
31-a
go-0
6
10-o
ct-0
6
19-n
ov-0
6
29-d
ic-0
6
7-fe
b-07
19-m
ar-0
7
28-a
br-0
7
7-ju
n-07
17-ju
l-07
26-a
go-0
7
5-oc
t-07
14-n
ov-0
7
24-d
ic-0
7
2-fe
b-08
13-m
ar-0
8
22-a
br-0
8
1-ju
n-08
Time
BS&
W
RB-31 RB - 45
Shut off due meteorological contingence (june 2007)
16 months keeping the "same"value of BS&W
Fastly increase of BS&Wtendency (3 months approx.)
Skin on wellbore dueorganic treatment
Rubiales - 47 Well
FREQUENCY VS BS&W - RB-47 WELL
20,00
25,00
30,00
35,00
40,00
45,00
50,00
55,00
60,00
65,00
70,00
75,00
80,00
19/01
/2006
19/02
/2006
19/03
/2006
19/04
/2006
19/05
/2006
19/06
/2006
19/07
/2006
19/08
/2006
19/09
/2006
19/10
/2006
19/11/2
006
19/12
/2006
19/01/2
007
19/02
/2007
19/03
/2007
19/04
/2007
19/05
/2007
19/06
/2007
19/07
/2007
19/08
/2007
19/09
/2007
19/10/2
007
19/11
/2007
19/12/2
007
DATE
BS
&W
(%) -
FR
EQ
(Hz)
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
BFP
D-B
OP
D-
PIP
BSW RPM O HZ BFPD
BOPD PIP
BS&W Tendency during 2006
Diesel Requirements to ESP Systems
ENGINE MODELNOMINAL
KVA PRIME MODE
NOMINAL KW PRIME
MODE
A-B B-C A-C A B CRB-025 55,0 NT855-G6 313 250 472 471 471 148 149 148 121,1 102,93 41,17 34,70 219,99 4491,6 82,43 789,17
RB-042H 45,0 NT855-G6 313 250 482 482 482 276 276 276 230,4 195,85 78,34 57,44 364,22 8359,9 83,33 1393,60RB-043D 41,0 NT855-G6 313 250 474 474 475 117 118 118 96,7 82,17 32,87 29,61 187,77 3913 85,76 557,21RB-044D 35,0 NT855-G6 313 250 474 475 475 60 60 62 49,9 42,39 16,96 19,88 126,04 241,5 74,62 61,29RB-045H 51,0 NT855-G6 313 250 474 475 475 187 190 191 155,7 132,31 52,92 41,89 265,60 8667 86,21 1195,18RB-047 36,0 NT855-G6 313 250 473 473 472 41 43 42 34,4 29,23 11,69 16,65 105,60 290,2 41,15 170,78
RB-048H 56,0 NT855-G6 313 250 472 472 472 247 246 246 201,4 171,17 68,47 51,40 325,92 7993,9 83,05 1354,97RB-055 49,0 NT855-G6 313 250 477 477 477 296 296 296 244,5 207,86 83,15 60,38 382,87 9749,3 83,04 1653,48RB-056 45,0 NT855-G6 313 250 462 462 463 138 142 144 113,2 96,20 38,48 33,05 209,55 7328,8 88,57 837,68RB-057 43,0 NT855-G6 313 250 478 478 478 250 250 250 207,0 175,93 70,37 52,57 333,30 5246,1 82,39 923,84
RB-060H 35,0 NT855-G6 313 250 479 479 479 110 110 110 91,3 77,57 31,03 28,49 180,64 4725 85,03 707,33RB-061H 38,0 NT855-G6 313 250 463 463 463 126 126 126 101,0 85,89 34,35 30,52 193,54 3395 30,26 2367,67RB-064H 38,0 NT855-G6 313 250 495 495 495 196 196 196 168,0 142,83 57,13 44,47 281,93 7601 88,27 891,60
CONS. DIESEL
(GAL/DAY)BFPD
DIESEL REQUIRED TO ESP SYSTEMS - RUBIALES OILFIELD
DIESEL CONS. BSW BOPDUSED %
LOADCONS. KVA
CONS. KWATT
SWELL Hz
PHASE VOLTAGE (VOLTS)
PHASE CURRENT (AMPERES)
170,841,2290105,616,711,734,436RB-47H
BOPDBS&WBFPDDiesel Cons.
(gal/day)
Diesel Cons.
UsedLoad (%)
KVA Cons.
HzWell
Diesel Requirements to PCP Systems
20631298,574,911,862,940,760RB-31
BOPDBS&WBFPDDiesel Cons.
(gal/day)
Diesel Cons.
UsedLoad (%)
KVA Cons.
RPMWell
POZO RPM´s ENGINE MODEL
NOMINAL KVA PRIME
MODE
NOMINAL KW PRIME MODE
INPUT VOLTAGE (VOLTS)
CURRENT (AMPERES)
CONS. KVA
CONS. KW
USED %LOAD
DIESEL CONS. (L/HR)
DIESEL CONS.
(GAL/DAY)BFPD BSW BOPD
RB-010 190 4BT3,9-G4 69 55 440 48 36,58 31,09 56,53 10,96 69,50 1028,1 81,11 194,21RB-030 130 4BT3,9-G4 69 55 479 29 24,06 20,45 37,18 8,41 53,31 646,4 88,29 75,69RB-031 60 4BT3,9-G4 69 55 461 51 40,72 34,61 62,93 11,81 74,86 298,5 31 205,97RB-033 255 4BT3,9-G4 69 55 450 41 31,96 27,16 49,39 10,02 63,52 1247,9 66,77 414,68RB-037 110 4BT3,9-G4 69 55 470 48 39,07 33,21 60,39 11,47 72,73 488,6 74,46 124,79RB-038 220 4BT3,9-G4 69 55 452 39 30,53 25,95 47,19 9,73 61,68 1121,5 72,46 308,86RB-039 205 4BT3,9-G4 69 55 452 27 21,14 17,97 32,67 7,81 49,53 788,8 80,85 151,06RB-041 220 4BT3,9-G4 69 55 452 38 29,75 25,29 45,98 9,57 60,67 1068,2 71,17 307,96RB-079 110 4BT3,9-G4 69 55 456 41 32,38 27,52 50,04 10,11 64,07 525,5 47,37 276,57
DIESEL REQUIREMENTS TO PCP SYSTEMS
Conclusions• PCP’s at Rubiales oilfield have permitted to keep the
production conditions in the wells that have this kind of artificial lift system in comparison with ESP’s.
• With PCP systems can ensure better production development of the wells and bigger productivity life of them.
• PCP completions are appropriate to be installed in horizontal or deviated wells with the Rubiales typical configuration, according with completions of the present.
At Rubiales oilfield there are some cases where it’s possible to re-evaluate the artificial lift selected. PCP and ESP systems.
• To select a kind of artificial lift system it’s very important to analyze power requirements to ensure save costs along the time.