Liquid Unloading with Multiphase Pumps

Transcription

1 2 nd Annual Appalachian Basin Gas Well Deliquification Seminar Hilton Garden Inn, Pittsburg, PA June 13-14, 2011 Liquid Unloading with Multiphase Pumps Presented by Joseph E. Latronica

2 Typical MPP Applications Multiphase Pumps Decrease back-pressure on wells to increase production Pressure boosting Overcome terrain issues Produce remote or marginal wells Utilizing existing downstream process facilities Flow assurance Produced Water and Emulsions New well Development 2

3 Multiphase Pumps Overall Facility reduction = Lower CAPEX 3

4 Multiphase Pumps Multiphase Pumps vs. Conventional Separation Reduction in facility size at pump location. Less equipment to maintain Flow conveyed in one pipe system Reduction in operational costs Pump system occupies smaller area Can be utilized for single or multiple wells 4

5 Multiphase Pumps Blue Suction Red Discharge Brown Gear Oil 5

6 Multiphase Pumps Blue Suction Red Discharge Brown Gear Oil 6

7 Multiphase Pumps Liquid Flow Multiphase Flow 7

8 Multiphase Pumps Liquid and gas phase split 8

9 Multiphase Pumps Slug Flow 9

10 Multiphase Pumps Why use Multiphase Pumps on gas wells? Liquid hold-up increases pressure on the formation and reduces gas flow rate from the well. Low velocity is a problem in tight gas formations and aging wells. Velocity slows to a point that it cannot overcome the critical velocity necessary to lift liquids up the production tubing. Removal of liquids (frack water) during well development allowing the well to move into production faster. Proven technology for boosting production. Multiphase Pumps reduce well head pressure (near atmospheric pressure), thus increasing tubing velocity and allowing the liquids to flow up the tubing with the gas flow. 10

11 Multiphase Pump System Outlet to Sales Line Inlet from Gas Well 11

12 Multiphase Pump System 12

13 Multiphase Pumps Liquid Knock-out 13

14 Casing Gas Installation Alberta, Canada Existing Conditions Average Gas: MSCF/d Average Oil: 74 BPD Average Water: 100 BPD GVF: 94.3% Total Flow: 3070 BPDe Field Experience 14

15 Design Considerations Field Experience Continue to off load casing gas while pump jack is not pumping Protect against running pump dry with the use of level switches Implement recovery of sealing liquid while pump jack is down to increase the operational time for casing gas off loading. Provide Inverter Duty Motor to allow unit to be easily upgraded to PLC controlled operation. Bed skid is standard oil field design to be relocated if necessary. 15

16 Operational Modes Field Experience Both Pump Jack and MPP in Operation: Casing Pump discharge into discharge piping header both gas and liquid. Pump Jack not running. MPP Operating Using Seal Liquid in Piping: MPP discharge into discharge piping header and discharge liquid is trapped to be recycled back to pump seals. The Casing Gas is pumped down stream. 16

17 Field Experience 17

18 Multiphase Pump Experience 18

19 Casing Gas Project Summary Field Experience Multiphade Pump System (MPS) installed in 2007 and still in use Well pressure drawn down to 10 PSIG Operated 3 months on 100% gas Overall Production Increase: 31.5 BPD Total project payout in 5 months 19

20 Field Experience MPP installed in Alberta, Canada GVF 97% 20

21 Recent Tests Wet Gas Compression MPS unit tested utilizing water and compressed air on closed loop lab system Gas Volume Fractions tested from 0 to 100% Seal Flush and seal provided from Liquid Knockout Boot Operated several hours at 100% GVF utilizing liquid recirculation from Knockout Boot 21

22 Wet Gas Compression MPP Unit at the Turbo Machinery Lab at Texas A&M Pump: L4MG Capacity: 7800 bpd Speed: 3600 rpm Power: 60 hp P: 250 psig 22

23 Wet Gas Compression 23

24 Multiphase Pump Experience 24

25 Multiphase Pump Experience Multiphase Pump 25

26 Multiphase Pump Experience L4MK Capacity: 522,000 bpde 26

27 Multiphase Pump Experience L4MK Power: HP GVF: 97% 27

28 Conclusions Multiphase Pumps Liquid management and improved well availability can be achieved through Multiphase Pumping Twin Screw Multiphase Pumps are simple machines that adapt to changing well conditions, thus extending end of life production MPP s can be utilized on new production wells at the time of development Systems are designed for portability Reduced environmental impact - no need for flaring Typically low noise emissions Limited facility size at the wellhead 28

29 Wet Gas MPP s 29

30 Wet Gas MPP s Portable engine driven modular unit 30

31 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. 31

32 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. 32