Authors: Rare Petre

Mihai Vasile

Coordinator: Assoc. Prof. PhD. Eng. Mariea Marcu

1

Summary

1. Introduction;

2. Objectives;

3. Pipesim Simulations;

4. Conclusions;

2

MULTIPHASE PUMPS

3 1. Introduction 2. Objectives 3. Pipesim Simulations 4. Conclusions

Classical Separation System

4 1. Introduction 2. Objectives 3. Pipesim Simulations 4. Conclusions

Multiphase Pumping System

5 1. Introduction 2. Objectives 3. Pipesim Simulations 4. Conclusions

6

Classification of multiphase pumps

1. Introduction 2. Objectives 3. Pipesim Simulations 4. Conclusions

Offshore System

7 1. Introduction 2. Objectives 3. Pipesim Simulations 4. Conclusions

The following advantages are specific for the multiphase pumps

Reduced equipment, capital cost and complexity;

Elimination of separate oil/water and gas lines;

Increased production rates;

Reduced wellhead back pressure;

Reduced weight and space requirements;

Increased reservoir life;

8 1. Introduction 2. Objectives 3. Pipesim Simulations 4. Conclusions

Disadvantages

9 1. Introduction 2. Objectivs 3. Pipesim Simulations 4. Conclusions

Nodal analysis

10 1. Introduction 2. Objectivs 3. Pipesim Simulations 4. Conclusions

Equipment performance curves

11 1. Introduction 2. Objectivs 3. Pipesim Simulations 4. Conclusions

Separator pressure influence

12 1. Introduction 2. Objectives 3. Pipesim Simulations 4. Conclusions

Variation Of Flowline & Riser

13 1. Introduction 2. Objectivs 3. Pipesim Simulations 4. Conclusions

Twin-screw & Helico-axial pumps

14 1. Introduction 2. Objectivs 3. Pipesim Simulations 4. Conclusions

Conclusions

From the parameters sensitivity study with riser inner diameter and flowline inner diameter result, that the impact of flowline inner diameter is more important than riser inner diameter if flow rate increases;

The multiphase flow theories influence the equipment performance curves and the nodal analysis points coordinates;

Decreasing the separator pressure nodal analysis point at the lower reservoir pressures;

Using multiphase pumps nodal analysis points at lower reservoir pressures;

From the sensitivity study with type pump (Twin screw, Helico-axial), speed (Twin screw) and differential pressure on the pumps, results that the last parameter is more important because it permits to have a nodal analysis point at the lower reservoir pressure, which means the extension of the natural flowing well life;

15 1. Introduction 2. Objectivs 3. Pipesim Simulations 4. Conclusions

References

Saadawi, H.: An Overview of Multiphase Pumping Technology and its Potential Application for Oil Fields in the Gulf Region, paper 11720-MS, International Petroleum Technology Conference, 4-6 December 2007 Dubai, U.A.E;

Oxley, K.C., Shoup G.J. : A Multiphase Pump Application in a Low-Pressure Oilfield Fluid-Gathering System in West

Texas, paper SPE 27995, University of Tulsa Centennial Petroleum Engineering Symposium, 29-31 August 1994, Tulsa,

Oklahoma;

Shippen, M., Scott, S. : Multiphase Pumping as an Alternative to Conventional Separation, Pumping and Compression,

34th Annual PSIG meeting Portland, Oregon, October 25, 2002;

Heyl, B.: Multipahse Pumping, 24th International Pump Users Symposium, Texas A&M University, 2008;

Charron, Y., Pagnier, P.: Multiphase Flow Helico-Axial Turbine, Applications and Performance, paper SPE 88643, 11th

Abu Dhabi international Petroleum Exhibition and Conference, 10-13 October 2004 Abu Dhabi, U.A.E.;

Yahaya, A., U., Al Gahtani, A.: A Comparative Study Between Empirical Correlations & Mechanistic Models of Vertical

Multiphase Flow, paper SPE 136931, King Fahd University of Petroleum & Minerals, 04-07 April 2010 Al-Khobar, Saudi

Arabia;

http://www.drbratland.com/PipeFlow2/chapter1.html.

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Thanks!

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