Analysis of downhole drilling vibrations : case studies of Manifa and Karan fields in Saudi Arabia

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Analysis of downhole drilling vibrations : case studies of Manifa and Karan fields in Saudi Arabia

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dc.contributor.advisor Gray, Kenneth E., Ph. D.
dc.creator Alabdullatif, Ziad Abdullrahman
dc.date.accessioned 2011-10-05T19:43:48Z
dc.date.available 2011-10-05T19:43:48Z
dc.date.created 2011-08
dc.date.issued 2011-10-05
dc.date.submitted August 2011
dc.identifier.uri http://hdl.handle.net/2152/ETD-UT-2011-08-2663
dc.description.abstract Downhole vibrations lead to downhole failures and decrease the rate of penetration (ROP). The bottom hole assembly (BHA) static and dynamic design is a key factor in optimizing drilling operations. The BHA should be designed to minimize the vibration levels in the axial, lateral, and torsional directions. This would be achieved by avoiding rotating the drillstring in the speeds that are nearby the natural frequency of BHA. The complexity associated with current BHA components requires using advanced computational tools that are capable of solving complex and time-consuming equations. Finite Element Analysis (FEA) is the most used technique in analyzing vibration behavior of the drillstring by mesh discretizing of a continuous body into small elements. This thesis will study the dynamic behavior of different BHA designs for Manifa and Karan fields of Saudi Aramco to optimize the drilling operations. The FEA software that will be used to conduct these studies is called Vibrascopeā„¢, which was developed by NOV. The software will determine the critical speeds of the drillstring that should be avoided to prevent resonance of the BHA, which will lead to severe downhole vibration.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subject Vibration
dc.subject Stick slip
dc.subject Axial
dc.subject Lateral
dc.subject Torsional
dc.subject Manifa
dc.subject Karan
dc.subject Aramco
dc.title Analysis of downhole drilling vibrations : case studies of Manifa and Karan fields in Saudi Arabia
dc.date.updated 2011-10-05T19:44:13Z
dc.identifier.slug 2152/ETD-UT-2011-08-2663
dc.contributor.committeeMember Florence, Fred
dc.description.department Petroleum and Geosystems Engineering
dc.type.genre thesis
dc.type.material text
thesis.degree.department Petroleum and Geosystems Engineering
thesis.degree.discipline Petroleum Engineering
thesis.degree.grantor University of Texas at Austin
thesis.degree.level Masters
thesis.degree.name Master of Science in Engineering

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