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Kees Veeken – Shell (NAM) Rahel Yusuf – SPT Group

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Presentation on theme: "Kees Veeken – Shell (NAM) Rahel Yusuf – SPT Group"— Presentation transcript:

1 Kees Veeken – Shell (NAM) Rahel Yusuf – SPT Group
Model the Effectiveness of Pump and Plunger by Transient Multi-Phase Flow Simulation Title slide Keep the title brief and to one line? The second line (in smaller type style) is for the date of the presentation – depending on your presentation, you may also need to include Location and/or Presenter’s name/s and Job title if needed – as a such a second line may be used for these purposes. Do not include unnecessary information in your presentation title – starting off with clear and simple messages will set the style and focus the audience for what is to follow. Kees Veeken – Shell (NAM) Rahel Yusuf – SPT Group

2 2013 Gas Well Deliquification Workshop Denver, Colorado
Contents Objectives Transient Vs Steady State Pump modeling Plunger modeling Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

3 2013 Gas Well Deliquification Workshop Denver, Colorado
Objectives How much back pressure is introduced by the flowing wet gas column in the presence of a pump that removes liquids from the bottom of the well ? The outcome determines the effectiveness of a pump and defines the best ways of operating a pump What is the effectiveness of a plunger that travels up to the subsurface safety valve but does not cover the short distance between subsurface safety valve and wellhead ? The outcome determines the requirement for a second plunger to dewater the top section Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

4 Transient Vs Steady State
Pump intake pressure sits in between too high steady state VLP and too low dry gas VLP How effective is downhole separation? How steady is production and how much gas will enter pump ? Plunger action is transient in nature Will slug of liquid be able to bridge “gap” ? Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

5 Pump Modeling Parameters
Power Liquid Gas 5.5” tubing + 5” liner down to 3040 m Pump on 1.5” 3020 m Inflow across m with 3% below pump Darcy inflow A=80 bara/(e3m3/d) Reservoir Pres= bara WGR=23-7, CGR=10 m3/e6m3 Wellhead pressure = 9 bara Constant mass pump rate for liquid and gas i.e. keeps pumping in case of gas ingress Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

6 OLGA Liquid Loading Point
IPR – Pres=69 bara LL – OLGA Qmin=58e3 m3/d VLP – Modified Gray VLP - Gray VLP – Cullender-Smith Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

7 Pres=55 bara – No Pumping Gas rate (e3 m3/d)
pump intake (bara) pump intake (-) Liquid in wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

8 Pres=55 bara – Pumping @ 1 m3/d
Stable pump intake: gassy liquid (8 Sm3/d gas) Gas rate (e3 m3/d) pump intake (bara) pump intake (-) Liquid in wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

9 Pres=55 bara – Pumping @ 1 m3/d
Significant holdup across bulk of wellbore Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

10 Pres=55 bara – Pumping @ 1 m3/d
Liquid holdup increases pump intake pressure Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

11 Pres=55 bara – Pumping @ 2 m3/d
Oscillating pump intake: gassy liquid or gas Gas rate (e3 m3/d) pump intake (bara) pump intake (-) Liquid in wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

12 Pres=55 bara – Pumping @ 2 m3/d
Holdup is slugging up and down wellbore Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

13 Pres=55 bara – Pumping @ 2 m3/d
Pump intake pressure oscillates Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

14 Pres=65 bara – Pumping @ 2 m3/d
Oscillating pump intake: gassy liquid or gas Gas rate (e3 m3/d) pump intake (bara) pump intake (-) Liquid in wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

15 Pumping Operating Points
IPR – Pres=75/65/55/35 bara VLP – Modified Gray VLP – Gray VLP – CS (dry & wet) OLGA – Pumping (m3/d) & LL Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

16 2013 Gas Well Deliquification Workshop Denver, Colorado
Pumping Summary Back pressure due to liquid holdup is unavoidable Magnitude increases as Q increases Insignificant at low enough Q but significant at higher Q as downhole separation becomes less effective Back pressure does not increase with higher WGR! Production penalty increases as inflow improves! Gas ingress into pump depends on pump rate and location of pump intake relative to inflow profile Pump off triggers slugging and large gas ingress Further explore influence of pump location, liner size and deviation on back pressure and gas ingress Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

17 Plunger Modeling Parameters
3.5” tubing to 1169 m, 5”x4.5” liner to 1310 m Plunger between 1145 m and m 102 m) m, A=5.2 bara/(e3m3/d) Pres=12-18 bara, WGR=10-88 m3/e6m3, CGR=0 m3/e6m3 Wellhead pressure = 8 bara 3.5” tubing plunger weight = 7.5 kg, zero leakage, SV or 3 bara BPV 9 plunger cycles 2 hr flow, 1 hr shut-in Trap Tubing PL Launch SV Wellbore Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado 17

18 Field – No Plunger, Close to LL
1 hr flow, 0.5 hr shut-in THP (barg) Gas Rate (Nm3/d) FTHP (bara) Gas Rate (Nm3/d) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

19 Field – Plunger 11 hrs ON, 1 hr OFF
1 hr flow, 0.5 hr shut-in TT~20 min (excessive) VEL~52 m/min (170 ft/min) ON period too long THP (barg) Gas Rate (Nm3/d) FTHP (bara) Gas Rate (Nm3/d) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

20 Field – Plunger 2 hrs ON, 1 hr OFF
1 hr flow, 0.5 hr shut-in TT~5 min VEL~209 m/min (690 ft/min) THP (barg) Gas Rate (Nm3/d) FTHP (bara) Gas Rate (Nm3/d) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

21 2013 Gas Well Deliquification Workshop Denver, Colorado
WGR=88 m3/e6m3, Pres=17.516.5bara Gas rate (Sm3/d) Cumulative Liquid (m3) Liquid in tubing (m3) Liquid in wellbore (m3) Pres=16.9bara Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

22 OLGA Liquid Loading Points
IPR – Pres= bara VLP – Modified Gray WGR=10-88 m3/e6m3 OLGA LL Points WGR=10-88 m3/e6m3 Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

23 WGR=88, Pres=15, Trap @0, BPV (#8)
THP (bara) Gas rate (Sm3/d) Liquid in Tubing (m3) Liquid in Wellbore (m3) Plunger Velocity (m/s) Plunger Position (m) TT~6.5 min VEL~161 m/min (530 ft/min) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

24 WGR=88, Pres=15, Trap @0, SV, 23.9 hr Holdup Tubing (-)
Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

25 WGR=88, Pres=15, Trap @0, SV, 24.05 hr Holdup Tubing (-)
Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

26 WGR=88, Pres=15, Trap @0, SV, 24.1 hr Holdup Tubing (-)
Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

27 WGR=88, Pres=15, Trap @0, SV, 24.15 hr Holdup Tubing (-)
Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

28 WGR=88, Pres=15, Trap @0, SV, 25.9 hrs Holdup Tubing (-)
Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Holdup Tubing (-) Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

29 WGR=88, Pres=15, Trap @0, SV, 26.05 hr Holdup Tubing (-)
Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

30 WGR=88, Pres=15, Trap @0, SV, 26.1 hr Holdup Tubing (-)
Pressure Tubing (bara) Holdup Wellbore (-) Pressure Wellbore (bara) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

31 WGR=88, Pres=15, Trap @0, BPV (#8)
THP (bara) Gas rate (Sm3/d) Liquid in Tubing (m3) Liquid in Wellbore (m3) Plunger Velocity (m/s) Plunger Position (m) TT~6.5 min VEL~161 m/min (530 ft/min) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

32 2013 Gas Well Deliquification Workshop Denver, Colorado
WGR=10, Pres=15, SV THP (bara) Gas rate (Sm3/d) Cumulative Liquid (m3) Liquid in Tubing (m3) Liquid in Wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

33 WGR=10, Pres=15, Trap @0, SV (#8) THP (bara) Gas rate (Sm3/d)
Liquid in Tubing (m3) Liquid in Wellbore (m3) Plunger Velocity (m/s) Plunger Position (m) TT~3.0 min VEL~350 m/min (1150 ft/min) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

34 WGR=10, Pres=14, Trap @0, SV (#8) THP (bara) Gas rate (Sm3/d)
Liquid in Tubing (m3) Liquid in Wellbore (m3) Plunger Velocity (m/s) Plunger Position (m) TT~3.3 min VEL~320 m/min (1050 ft/min) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

35 WGR=10, Pres=13, Trap @0, SV (#8) THP (bara) Gas rate (Sm3/d)
Liquid in Tubing (m3) Liquid in Wellbore (m3) Plunger Velocity (m/s) Plunger Position (m) TT~4 min VEL~260 m/min (850 ft/min) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

36 WGR=10, Pres=12, Trap @0, SV (#4) THP (bara) Gas rate (Sm3/d)
Liquid in Tubing (m3) Liquid in Wellbore (m3) Plunger Velocity (m/s) Plunger Position (m) TT~5 min VEL~209 m/min (690 ft/min) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

37 2013 Gas Well Deliquification Workshop Denver, Colorado
WGR=88, Pres=15, BPV THP (bara) Gas rate (Sm3/d) Cumulative Liquid (m3) Liquid in Tubing (m3) Liquid in Wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

38 2013 Gas Well Deliquification Workshop Denver, Colorado
WGR=88, Pres=15, SV THP (bara) Gas rate (Sm3/d) Cumulative Liquid (m3) Liquid in Tubing (m3) Liquid in Wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

39 2013 Gas Well Deliquification Workshop Denver, Colorado
WGR=88, Pres=15, SV THP (bara) Gas rate (Sm3/d) Cumulative Liquid (m3) Liquid in Tubing (m3) Liquid in Wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

40 2013 Gas Well Deliquification Workshop Denver, Colorado
WGR=88, Pres=15, SV THP (bara) Gas rate (Sm3/d) Cumulative Liquid (m3) Liquid in Tubing (m3) Liquid in Wellbore (m3) Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

41 With Plunger – Operating Points
IPR – Pres= bara VLP – CS WGR=11-88 m3/e6m3  – LL WGR=11-88 m3/e6m3 O – WGR=11, Trap=0  – WGR=88, Trap=0  – WGR=88, Trap=102 Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

42 2013 Gas Well Deliquification Workshop Denver, Colorado
Plunger Summary Transient multi-phase flow model produces credible results and provides insight into influence of well parameters on plunger performance Plunger needs to travel to top of tubing to deliver maximum value i.e. liquid slug cannot bridge large “gap” Plunger introduces back pressure proportional to WGR which can limit applicability in prolific wells Gas production during upward travel must deliver minimum plunger velocity and will diminish as slug size increases Further explore influence of plunger launch position, wellbore (plus annulus) volume, inflow performance and plunger ON/OFF schedule Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

43 2013 Gas Well Deliquification Workshop Denver, Colorado
Copyright Rights 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 Well Deliquification Workshop, they grant to the Workshop, the Artificial Lift Research and Development Council (ALRDC), and the Southwestern Petroleum Short Course (SWPSC), rights to: Display the presentation at the Workshop. Place it on the 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 use of this presentation is prohibited without the expressed written permission of the author(s). The owner company(ies) and/or author(s) may publish this material in other journals or magazines if they refer to the Gas Well Deliquification Workshop where it was first presented. Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado

44 2013 Gas Well Deliquification Workshop Denver, Colorado
Disclaimer The 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 Well Deliquification Web Site. The Artificial Lift Research and Development Council and its officers and trustees, and the Gas Well Deliquification 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 Well Deliquification 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. Feb. 17 – 20, 2013 2013 Gas Well Deliquification Workshop Denver, Colorado


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