Date post: | 05-Jun-2018 |
Category: |
Documents |
Upload: | duongkhuong |
View: | 226 times |
Download: | 2 times |
34th Gas-Lift WorkshopSingapore
February 7 - 11, 2011
This presentation is the property of the author(s) and his/her/their company(ies).It may not be used for any purpose other than viewing by Workshop attendees without the expressed written permission of the author(s).
Troubleshooting Unloading Gas Lift Design using DynaLiftTM
Ron Schmidt - Weatherford International
William Rucker – Weatherford International
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 2
Outline
• Well parameters and current unloading gas lift design
• Gas Lift Design evaluation with DynaLiftTM
• Gas Lift Re-Design with current GLM depths• Gas Lift Re-Design evaluation with DynaLiftTM
• Well evaluation for optimum gas lift mandrel depths and valve calibration
• New gas lift design evaluation with DynaLiftTM
• Summary
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 3
GL Design Parameters
• Open hole, horizontal well completions with9-5/8” csg and 4.5” tbg in the deviated, verticalsection of well
• The PI range 15 – 20 B/D/psi, ~ 2800 – 3000 psiSBHP, FGOR ~ 171:1 scf/bbl, WHP ~ 200 – 400 psi
• Current GL design had four (4) mandrel depths,1750 psi gas injection pressure, required Qi = 5.0mmscfpd, and orifice in bottom mandrel.
• Reported unloading problems – long unloadingtime, limited gas injection rate, suspected topvalve not opening
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 4
Current GL Design
• GLM depths in Meters were converted into Feetfor DynaLift input and redesign.
• Typical gas lift design method with increasingport size as depth increases.
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 5
Current GL Design
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 6
Current GLD – flowing - DynaLift™
-1000
0
1000
2000
3000
4000
5000
6000
7000
8000
0 100 200 300 400 500 600 700 800 900
BFPD/Mcsfpd/Depth/Temp
F
ELAPSED TIME (minutes)
Original Design - Flowing
Pwhi
Pwhf
STB/day
Mscfd out
Mscfd in
TVD Annulus
Pbhf
Temp wh
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 7
Current GLD – GLV - DynaLift™
-200
0
200
400
600
800
1000
1200
0 100 200 300 400 500 600 700 800 900
Qi
_
Mcfpd
_
API-C
ELAPSED TIME (Minutes)
Original Design - Qi
3586 GLV QI
6204 GLV QI
API C Value @ 8521
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 8
Redesign with Current GLM Depths
• Redesign the unloading valves with larger ports –incorporate the “throttling” characteristics of IPO valves.
• Review the well performance and determine the optimalgas injection rate.
• Simulate well unloading and operation parameters withDynaLiftTM
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 9
Current GLM - Redesign - flowing DynaLift™ simulation
-1000
0
1000
2000
3000
4000
5000
6000
7000
8000
0 200 400 600 800 1000 1200 1400
PSI-D
EPTH
-msc
fpd-
BFP
D-T
empe
ratu
re
Elapsed Time - minutes
Pwhi
Pwhf
STB/day
Mscfd out
Mscfd in
TVD Annulus
TVD Tubing
Pbhf
Temp wh
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 10
Current GLM - Redesign – GLV -DynaLift™ simulation
-500
0
500
1000
1500
2000
0 200 400 600 800 1000 1200 1400
GLV
QI -
MSC
FPD
__
GLV
ql -
BFP
D
Elapsed Time - Minutes
Redesign ORIG GLM - GLV's
3586 GLV Qi
6205 GLV Qi
7986 GLV Qi
7986 GLV BLPD
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 11
Redesign -GLM Depths
• Redesign the gas lift mandrels depths based upon wellperformance evaluation and gas lift valve operatingdifferential vs IPR.
• Review the well performance and determine the optimalgas injection rate (3.5 mmscfpd).
• Simulate well unloading and operation parameters withDynaLiftTM
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 12
GLM - Redesign – flowing - DynaLift™
-2000
0
2000
4000
6000
8000
10000
0 200 400 600 800 1000 1200 1400
Pres
sure
-M
scfp
d -D
epth
-B
FPD
-Te
mpe
ratu
re
ELAPSED TIME - Minutes
Redesign GLM Depths - All GLV's
Pwhf
STB/day
Mscfd out
Mscfd in
TVD Annulus
Pbhf
Temp wh
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 13
GLM - Redesign – GLV - DynaLift™
-500
0
500
1000
1500
2000
2500
3000
0 200 400 600 800 1000 1200
Qi -
Msc
fpd
ELAPSED TIME - Minutes
Revised GLM Depths and GLV's Performance
3650 GLV Qi
5800 GLV Qi
7100 GLV Qi
7670 GLV Qi
8100 GLV Qi
8530 GLV Qi
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 14
Final - Redesign – GLV - DynaLift™
-500
0
500
1000
1500
2000
2500
3000
3500
4000
0 200 400 600 800 1000 1200
Qi -
Msc
fpd
ELAPSED TIME - Minutes
Gas Lift Valve Performance - unloading Redesign GLM Depths
3650 GLV Qi
5800 GLV Qi
7100 GLV Qi
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 15
Benefits using DynaLift™
• Utilize as a troubleshooting tool and identifies: Problems in current design – GLM depths and GLV calibration or
port selection
Evaluate proposed gas lift design changes prior to equipment installation
Evaluate surface restrictions (flowline ID, WHCK’s)
• Improve gas lift design practices and procedures Compares well performance based on gas lift mandrels spacing
or depths
Useful as an operator training tool (erosion in unloading GLV’s, unloading duration, Qi)
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 16
Any Questions ??
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 17
CopyrightRights to this presentation are owned by the company(ies) and/or author(s) listed on the title page. By submitting this presentation to the Gas-Lift Workshop, they grant to the Workshop, the Artificial Lift Research and Development Council (ALRDC), and the American Society of Mechanical Engineers (ASME), rights to:
– Display the presentation at the Workshop.– Place it on the www.alrdc.com web site, with access to the site to be as
directed by the Workshop Steering Committee.– Place it on a CD for distribution and/or sale as directed by the Workshop
Steering Committee.Other uses of this presentation are prohibited without the expressed written permission of the company(ies) and/or author(s) who own it and the Workshop Steering Committee.
Feb. 7 - 11, 2011 2011 Gas-Lift Workshop 18
DisclaimerThe following disclaimer shall be included as the last page of a Technical Presentation or Continuing Education Course. A similar disclaimer is included on the front page of the Gas-Lift Workshop Web Site.The Artificial Lift Research and Development Council and its officers and trustees, and the Gas-Lift Workshop Steering Committee members, and their supporting organizations and companies (here-in-after referred to as the Sponsoring Organizations), and the author(s) of this Technical Presentation or Continuing Education Training Course and their company(ies), provide this presentation and/or training material at the Gas-Lift Workshop "as is" without any warranty of any kind, express or implied, as to the accuracy of the information or the products or services referred to by any presenter (in so far as such warranties may be excluded under any relevant law) and these members and their companies will not be liable for unlawful actions and any losses or damage that may result from use of any presentation as a consequence of any inaccuracies in, or any omission from, the information which therein may be contained.The views, opinions, and conclusions expressed in these presentations and/or training materials are those of the author and not necessarily those of the Sponsoring Organizations. The author is solely responsible for the content of the materials.The Sponsoring Organizations cannot and do not warrant the accuracy of these documents beyond the source documents, although we do make every attempt to work from authoritative sources. The Sponsoring Organizations provide these presentations and/or training materials as a service. The Sponsoring Organizations make no representations or warranties, express or implied, with respect to the presentations and/or training materials, or any part thereof, including any warrantees of title, non-infringement of copyright or patent rights of others, merchantability, or fitness or suitability for any purpose.