Download Flow Assurance and Multiphase Pumping PDF

TitleFlow Assurance and Multiphase Pumping
TagsPump Fluid Dynamics Petroleum Petroleum Reservoir Subsea (Technology)
File Size8.0 MB
Total Pages208
Table of Contents
                            Title page.pdf
Second Page.pdf
Table of Contents.pdf
List of Figures.pdf
List of Tables.pdf
Literature Review.pdf
Flow Assurance.pdf
Multiphase Pumping.pdf
Solids Formation and Depostion.pdf
Experimental Setup.pdf
Solids Production and Management.pdf
Integrated Approach to Flow Assurance.pdf
Summary and Conclusions.pdf
Document Text Contents
Page 104


and prevent agglomeration of crystals8. The anti-agglomerates are a better alternative to the

traditional methanol injection.

For qualification of hydrate control strategy for flow assurance, the following aspects of hydrates

need to be considered65:

Composition, density, heat capacity, heat of dissociation, thermal conductivity and





Blockage potential

The laboratory characterization of hydrates includes study of thermodynamic equilibrium

conditions, amount of sub-cooling required, degree of hydrate formation and change in rheology.

The evaluation of inhibitors is focused on their ability to prevent agglomeration of hydrate nuclei

and minimize rheology alteration. Addition of inhibitors increases the environmental concerns

downstream. Methanol has been known to cause total hydrocarbon content of produced water

effluent to exceed allowable limits in the Gulf of Mexico.

Fig. 49: Shifting of Hydrate Equilibrium by Presence of Electrolyte and MeOH72

Page 105


The dissolved salts in produced water help inhibit hydrate formation to some extent64. Where

water salinity is not enough to inhibit hydrate formation, the flow of hydrates as slurry in pipeline

using kinetic inhibitors is attractive for high water cut systems. Tohidi et al.64 has shown that

electrolytes present in system shift the hydrate equilibrium curve to the left. Fig. 49 shows that

addition of salt to water in water-hydrocarbon system shifts the hydrate equilibrium to the left.

The unconventional inhibitors are effective at much less concentrations as compared to typical

methanol and glycol injection requirements65. In oil industry, it is often difficult to introduce any

new technology or any new chemical. Consequences of failure are so severe that the operators

remain very conservative in adapting anything new for the first time.

Fig. 50: Options for Transport of NGH73

Page 207


93. Martinez, J. K. and Konopczynski, M. R.: “Integrated Reservoir Management in an

Intelligent Well Environment,” paper SPE 77853, presented at 2002, SPE Asia Pacific Oil

and Gas Conference and Exhibition, Melbourne, October 8-10.

94. Alimonti, C. and Falcone, G.: “Integration of Multiphase Flowmetering Neural Networks,

Fuzzy Logic in Field Performance Monitoring,” paper SPE 87629, SPE Production and

Facilities (February 2004) 25.

95. Lamey, M. F., Schoppa, W., Stingl, K. H., Turley, Jr., A. J.: “Dynamic Simulation of

Europa and Mars Expansion Projects: A New Approach to Coupled Subsea and Topside

Modeling,” paper SPE 56704, presented at 1999 SPE Annual Technical Conference and

Exhibition, Houston, October 3-6.

96. “What is .NET?”, Accessed June 2006.

Page 208



Hemant G. Nikhar

[email protected]

3116 TAMU 603 Richardson Building

College Station, TX 77843-3116


MS (Petroleum Engineering), Texas A&M University, College Station, TX, USA, December 2006

BS (Petroleum Engineering), Indian School of Mines, Dhanbad, India, May 1998


Texas A&M University, Department of Petroleum Engineering (Fall 2004 – Summer 2006):

Research Associate

Coursework at Texas A&M

Drilling, Modern Petroleum Production, Advanced Reservoir Engineering and Simulation, Well

Stimulation, Petroleum Project Evaluation, Reserves Estimation, Petroleum Reservoir

Management, Transport Phenomena.

mailto:[email protected]

Similer Documents