Micromechanical measurements of the effect of surfactants on cyclopentane hydrate shell properties

2016 ◽  
Vol 18 (1) ◽  
pp. 594-600 ◽  
Author(s):  
Erika P. Brown ◽  
Carolyn A. Koh
Keyword(s):  
Clathrate Hydrate ◽  
Hydrate Shell ◽  
Cohesion Force ◽  
Hydrate Plug ◽  
Plug Formation ◽  
New Strategies

Investigating the effect of surfactants on clathrate hydrate growth and morphology, especially particle shell strength and cohesion force, is critical to advancing new strategies to mitigate hydrate plug formation.

Improved Predictions of Hydrate Plug Formation in Oil-Dominated Flowlines

2009 ◽  
Author(s):  
Simon Davies ◽  
John Boxall ◽  
Laura Dieker ◽  
Amadeu Sum ◽  
Carolyn Koh ◽  
...  
Keyword(s):  
Hydrate Plug ◽  
Plug Formation

Assessing the risk of hydrate plug formation: a new probability and management tool

2015 ◽  
Vol 55 (2) ◽  
pp. 477
Author(s):  
Zachary Aman ◽  
Bruce Norris ◽  
Michael Johns ◽  
Eric F. May
Keyword(s):  
New Technologies ◽  
Water Concentration ◽  
Operating Conditions ◽  
Management Tool ◽  
Flow Assurance ◽  
Long Distance ◽  
The Past ◽  
Hydrate Plug ◽  
Plug Formation ◽  
Low Dosage

As production moves towards harsher operating conditions, the conventional strategy of complete hydrate avoidance may not be economically viable. In the past two decades, the development of new technologies, such as low-dosage hydrate inhibitors and active pipeline heating, have enabled new management strategies where limited quantities of hydrate may be allowed to form without endangering the flowline. While this strategy may result in cost savings for long-distance tiebacks, its success hinges on accurate predictive capabilities for hydrate formation and transportability. In this extended abstract, the authors present a new freeware Hydrate Flow Assurance Simulation Tool (HyFAST), where the risk of hydrate plug formation can be directly predicted in subsea flowlines for use in flow assurance concept selection and process engineering. This tool is based on deterministic hydrate plug formation stages—including phase dispersion, hydrate growth rate and particle agglomeration—developed in the international engineering community in the past 20 years. HyFAST expands this conventional paradigm by introducing a new probabilistic engine to account for dynamic hydrate nucleation. This expanded capability enables flow-assurance engineers to directly quantify the risk of plug formation as a function of: flowline length; insulation thickness; produced water concentration; the amount of thermodynamic inhibitor injected; and, the amount of low-dosage hydrate inhibitor injected. An open discussion of all models and assumptions underlying the tool is presented, and the use of this tool to quantify hydrate plug formation risk is demonstrated.

Hydrate plug formation risk with varying watercut and inhibitor concentrations

2015 ◽  
Vol 126 ◽  
pp. 711-718 ◽  
Author(s):  
Young hoon Sohn ◽  
Jakyung Kim ◽  
Kyuchul Shin ◽  
Daejun Chang ◽  
Yutaek Seo ◽  
...  
Keyword(s):  
Hydrate Plug ◽  
Plug Formation

Gas Hydrate Deposition in Flowlines: A Challenging Problem in Flow Assurance

2013 ◽  
Author(s):  
Giovanny A. Grasso ◽  
Prithvi Vijayamohan ◽  
E. Dendy Sloan ◽  
Carolyn A. Koh ◽  
Amadeu K. Sum
Keyword(s):  
Gas Hydrate ◽  
Preliminary Investigation ◽  
Pass System ◽  
Hydrate Deposition ◽  
Liquid Systems ◽  
Multiphase Fluid Flow ◽  
Multiphase Fluid ◽  
Pipeline Wall ◽  
Hydrate Plug ◽  
Plug Formation

Gas hydrate deposition on the pipeline wall is one of the key processes leading to hydrate plug formation; however, this phenomenon is still poorly understood and missing in a full comprehensive model for simulating/predicting hydrate cold slurry flow (1). To gain a better understanding on hydrate deposition, we have performed several experiments of hydrate deposition on a solid surface for liquid systems (gas free). This preliminary investigation helps to better understand the challenges for further investigations of hydrate deposition in multiphase fluid flow. From this research, the importance of maintaining a constant concentration of the hydrate former and simulating a single pass system were identified; the challenges to control the temperature of the deposition surface, as well as the gradient of the temperature between the fluid and metal surface to promote deposition have also been identified.

The Effect of Chemistry and System Conditions on Hydrate Interparticle Adhesion Forces Toward Aggregation and Hydrate Plug Formation

2011 ◽  
Author(s):  
Zachary Mark Aman ◽  
Guro Aspenes ◽  
E. Dendy Sloan ◽  
Amadeu Sum ◽  
Carolyn Koh
Keyword(s):  
Adhesion Forces ◽  
Hydrate Plug ◽  
Plug Formation

scholarly journals A study of hydrate plug formation in a subsea natural gas pipeline using a novel high-pressure flow loop

2013 ◽  
Vol 10 (1) ◽  
pp. 97-105 ◽  
Author(s):  
Wenqing Li ◽  
Jing Gong ◽  
Xiaofang Lü ◽  
Jiankui Zhao ◽  
Yaorong Feng ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Gas Pipeline ◽  
Flow Loop ◽  
Pressure Flow ◽  
Natural Gas Pipeline ◽  
Hydrate Plug ◽  
Plug Formation

Predicting Hydrate Plug Formation in a Subsea Tieback

2008 ◽  
Author(s):  
Simon Richard Davies ◽  
John Boxall ◽  
Carolyn Ann Koh ◽  
E. Dendy Sloan ◽  
Pal Hemmingsen ◽  
...  
Keyword(s):  
Hydrate Plug ◽  
Plug Formation

scholarly journals Research on Gas Hydrate Plug Formation under Pipeline-Like Conditions

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Florian Stephan Merkel ◽  
Carsten Schmuck ◽  
Heyko Jürgen Schultz ◽  
Timo Alexander Scholz ◽  
Sven Wolinski
Keyword(s):  
Gas Hydrates ◽  
Gas Hydrate ◽  
Gas Flow ◽  
Energy Resource ◽  
Gas Storage ◽  
Natural Gases ◽  
Induction Times ◽  
Operational Expenditure ◽  
Hydrate Plug ◽  
Plug Formation

Hydrates of natural gases like methane have become subject of great interest over the last few decades, mainly because of their potential as energy resource. The exploitation of these natural gases from gas hydrates is seen as a promising mean to solve future energetic problems. Furthermore, gas hydrates play an important role in gas transportation and gas storage: in pipelines, particularly in tubes and valves, gas hydrates are formed and obstruct the gas flow. This phenomenon is called “plugging” and causes high operational expenditure as well as precarious safety conditions. In this work, research on the formation of gas hydrates under pipeline-like conditions, with the aim to predict induction times as a mean to evaluate the plugging potential, is described.

Predicting Hydrate-Plug Formation in a Subsea Tieback

2009 ◽  
Vol 24 (04) ◽  
pp. 573-578 ◽  
Author(s):  
Simon R. Davies ◽  
John A. Boxall ◽  
Carolyn Koh ◽  
E. Dendy Sloan ◽  
Pål V. Hemmingsen ◽  
...  
Keyword(s):  
Hydrate Plug ◽  
Plug Formation

Characterization of Crude Oils That Naturally Resist Hydrate Plug Formation

2017 ◽  
Vol 31 (6) ◽  
pp. 5806-5816 ◽  
Author(s):  
Zachary M. Aman ◽  
William G. T. Syddall ◽  
Agnes Haber ◽  
Yahua Qin ◽  
Brendan Graham ◽  
...  
Keyword(s):  
Crude Oils ◽  
Hydrate Plug ◽  
Plug Formation
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