SPE Online Education
Gas Kick Retention in Risers
Recorded On: 04/13/2021
The work described here originated from the tragic and ultimately environmentally catastrophic event at the Macondo well in April 2010. The first part of the prsentation addresses the causes for the sudden and often destructive ejection of hydrocarbons from a riser when a gas kick escapes timely detection. The approach differs from previous work on the subject and provides a realistic understanding of the sequence of events responsible for the phenomenon. The focus is on the crucial few minutes and seconds prior to the sudden eruption of gas and provides a quantitative illustration of the extreme rapidity of the ejection which leaves no time for a drill crew to adopt mitigation measures. It is shown that, in many cases, a back-pressure applied at the top of the well can be beneficial. The second part of the presentation describes a novel method for the detection of gas which relies on the measurement of pressure differences along sections of the riser. These data are sensitive to the mean density of the fluid in the section and can therefore detect the presence of free gas. Laboratory experiments supporting the idea are described. Proper signal processing can be developed which may be able to allow for automatic mitigation measures to be taken in the event of an otherwise undetected gas influx approaching the surface.
This webinar is categorized under the Drilling technical discipline.
All content contained within this webinar is copyrighted by Ramanan Krishnamoorti, Andrea Prosperetti and George Wong and its use and/or reproduction outside the portal requires express permission from Ramanan Krishnamoorti, Andrea Prosperetti and George Wong.
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Dr. Ramanan Krishnamoorti
Chief Energy Officer, University of Houston
Dr. Ramanan Krishnamoorti is the chief energy officer at the University of Houston. Prior to his current position, Krishnamoorti served as interim vice president for research and technology transfer for UH and the UH System. During his tenure at the university, he has served as chair of the UH Cullen College of Engineering’s chemical and biomolecular engineering department, associate dean of research for engineering, professor of chemical and biomolecular engineering with affiliated appointments as professor of petroleum engineering and professor of chemistry.
Distinguished Professor of Mechanical Engineering, University of Houston
Andrea Prosperetti is a Distinguished Professor of Mechanical Engineering at the University of Houston, which he joined after 30+ years as CA Miller Professor of Mechanical Engineering at the Johns Hopkins University, where he still holds the title of Homewood Professor. Prosperetti’s work is in the general area of multiphase flow: bubble dynamics and bubbly flows, particulate flows and applied mathematics. He is author or co-author of about 250 refereed journal papers and two books. He recently stepped down as editor in chief of the International Journal of Multiphase Flow which he led for a decade. He is a member of the US National Academy of Engineering and of the Dutch Royal Academy of Arts and Sciences.
Dr. George Wong
University of Houston
Dr. George Wong conducts research in areas of geomechanics, well integrity and containment, completions, sand management, multiphase flows, and well operations (bean-up and ramp-up) for both producers and injectors. He is a recipient of the SPE Distinguished Membership in 2015 and the SPE Gulf Coast Regional Completion Optimization and Technology Award in 2013. He has 17 years of R&D and 14 years of deepwater development and production experiences in the industry. Before joining UH, Dr. Wong worked as a Production Engineering Advisor and Principal Technical Expert in Sand Control and Sand Management at Shell E&P Company, USA.
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