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Meet Our Team

Meet Our

Current Students

Current Students

Vinicius worked as an undergraduate research assistant in a project researching renewable energy, with emphasis in solar energy and later another project developing heat exchangers made of composite materials.  He was an intern in the Industrial Engineering department at WEG Motors and worked as an analyst in projects reducing the cost of manufacturing and improving the quality of products and processes at one of WEG’s foundry. While getting his master's degree, he was a research assistant in a project studying supercritical fluids, such as carbon dioxide, and worked in a separate project applying machine learning to boiling heat transfer.

Currently, Vinicius is a Ph.D. student in petroleum engineering at The University of Tulsa studying heat transfer in multiphase flow and application of machine learning techniques in engineering applications.

Vinicius Kramer-Scariot

Meet Our Staff


Cem Sarica

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Cem Sarica holds B.S. (1982) and M.S. (1984) degrees in petroleum engineering from Istanbul Technical University (ITU) and a Ph.D. (1990) degree in petroleum engineering from The University of Tulsa (TU). After serving as an Assistant Professor of Petroleum Engineering at ITU, he joined the research staff at TU in 1992, and was Associate Director of the Tulsa University Fluid Flow Projects (TUFFP) until 1998 when he joined the faculty at The Pennsylvania State University. He joined the Petroleum Engineering Department at TU in 2001. He is currently serving as Professor of Petroleum Engineering. His responsibilities include the directorships of both TUFFP, and the Tulsa University Paraffin Deposition Projects (TUPDP).

Cem's research interests are multiphase flow in pipes, flow assurance and oil and gas production. He has authored several publications on these subjects.

Cem is a member of both the Society of Petroleum Engineers (SPE) and the American Society of Mechanical Engineers (ASME). He served as an Associate Technical Editor of ASME Journal of Energy Resources Technology (JERT) from 1998 -2004. He has previously served as a member of the SPE Production Operations Committee and is a member of the SPE Journal Editorial Board. He was one of the recipients of the SPE's Outstanding Editor Award in 2000. He is a member of SPE Facilities and Construction Standing Committee. He is currently serving as the Chair of SPE Facilities and Construction Award Committee. In addition to his SPE activities, he serves as a Technical Advisory Committee member of BHRg's Multiphase Technology Conferences.

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Eduardo Pereyra

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Eduardo Pereyra received his M.S. and Ph.D. degrees in petroleum engineering from The University of Tulsa.  He holds two B.S. degrees from the University of Los Andes; one is in Mechanical Engineering and the other in System Engineering.

He started his career at the R&D center of the Venezuelan oil company PDVSA-Intevep.  He also worked for Multiphase System Integration (MSI) and at Chevron's Advanced Production Technology Unit as a Research Scientist Intern. Eduardo is an active researcher in the area of multiphase flow and its applications to pipelines, surface oil and gas facilities, artificial lift, separation, and metering systems.

Eduardo is currently an associated professor of the McDougall School of Petroleum Engineering. Eduardo is one of the TU professors associated with the University of Tulsa North Campus Research Facilities. This campus contains unique facilities and state of the art instrumentation for oil and gas-related research.


Bonny Hardgrove

Bonny holds a B.A. in Communications from Oklahoma Christian University. She has held positions as administrator and content editor in a number of fields and joined the TU Petroleum Engineering team in 2022. She intends to pursue her M.A. in English Literature at the University of Tulsa.


Scott Graham

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Mr. Graham is a Project Engineer for The University of Tulsa (TU) serving primarily the TU Fluid Flow Projects (TUFFP) and TU Paraffin Deposition Projects (TUPDP) consortia within the Petroleum Engineering Department. This consortium consists of sixteen international oil companies and focuses it's studies on fluid flow and paraffin deposition. His responsibilities include working with Master and Ph.D. students to develop innovative measurement systems and sensors; plus teach and transfer practical instrumentation and control knowledge to students. He has an Associates Degree in Electrical/Electronics and has over 23 years of experience in the application and development of instrumentation devices and systems. He is currently working on his Bachelors in Political Science. Prior to coming to TU, Scott was the Program Coordinator for the Electrical/Electronic program of study at Oklahoma State University (OSU) - Okmulgee. In addition to the administrative responsibilities of his position, he served as the advisor to the ISA student section and taught the Process Measurement and Control classes. He served in that position for five years.

Scott began his career working as a roustabout for Conoco NGP in Carlsbad, New Mexico. Later as an instrument technician Scott designed and installed automation systems for gas processing plants. He also performed new electrical construction and assisted in putting together an electrical/instrumentation training program classes for Conoco's associate engineers in New Mexico and West Texas.

In 1992 after working for Conoco and gaining experience elsewhere, his career lead him to operate his own company based in Broken Arrow, Oklahoma. Through Panel-Tek Inc., he designed, manufactured, and marketed chemical injection equipment, and electronic controls for the petroleum industry. From this work he holds several patents related to measurement of crude oil and related processes. The products produced included such items temperature and pressure measurement devices, flow computers, and data acquisition equipment. In 1997 Emerson Electric purchased Panel-Tek where he stayed on as Operation Manager for two years.

Scott enjoys working with students to help them to develop and master the technical skills needed to function in today's marketplace.

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Raphael Viggiano

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Raphael Viggiano is pursuing his D.Sc. Degree in Mechanical Engineering at Universidade Federal do Rio de Janeiro (COPPE/UFRJ), in Brazil. He is a Mechanical Engineer and received his M.Sc. Degree in Mechanical Engineering from the same institution. Raphael has expertise on the area of Fluid Mechanics with emphasis on modeling development and numerical simulation of transient two-phase flow in pipelines.

Raphael's current research is focused on the modeling of a free piston traveling through a pipe and driven by the dynamics of a transient two-phase flow. This type of problem is representative of tools that are widely used in the oil and gas industries, such as plungers and pigs.   As part of this research, Raphael did an experimental campaign on two-piece continuous flow plungers as a Visiting Scholar at The University of Tulsa working for TUHWALP projects. The final goal of his research is the development of the transient numerical simulator that will be able to represent the physical phenomena of this type of problems.

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Robert Sutton

Robert Sutton received a BS degree in Petroleum Engineering from Marietta College in May, 1978 and began work with Marathon Oil Company in Lafayette, LA in June.  Concurrent with full time work at Marathon, Rob pursued a MS degree in Petroleum Engineering at The University of Southwestern Louisiana (now University of Louisiana at Lafayette) which was received in December, 1983.

While in Lafayette with Marathon, Rob worked in the Operations (offshore, well completions, workovers, surveys & stimulation), Reservoir (reserve evaluations, production forecasting and economics) and Budget Control (district office budget administration) Departments.  In 1985 he transferred to Marathon’s Denver Research Center and worked in the Applied Technology Group where he worked with black oil and compositional reservoir models and EOS programs.  Rob also became the Marathon contact for industry programs at The University of Tulsa (TUFFP, TUPDP and later TUHWALP).  An interest in multiphase flow led Rob to develop in-house software for use in the areas of Nodal Analysis, gas well unloading, erosional velocity, and oil-gas-water PVT evaluation.  In 2001, the technology group relocated to Houston from Denver where Rob remained active in applied technology support.  Rob retired from Marathon on Jan.1, 2014 after 35.5 years of service.  He also received the 2014 SPE Production sand Operations award that year.

Rob remains active in the industry serving on various SPE committees, ALRDC and is a member of the API 19G Task Group for gas lift recommended practices.  He is a visiting scholar at the McDougall School of Petroleum Engineering for The University of Tulsa.  He is also active as a petroleum consultant.  Rob has participated in authoring 29 SPE papers with 10 published in SPE Journals.  He contributed to the oil PVT chapter in the SPE Petroleum Engineering Handbook and a chapter in the book titled Gas Well Deliquification, 2nd Ed.  Rob was a SPE distinguished lecturer during the years 2012-13 and 2015-16.  He has also given numerous talks on horizontal well performance and liquid loading at various ALRDC Gas Well Deliquification Workshop and SPE meetings.


Kelley Friedberg

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Kelley Friedberg holds a BA in Languages and Literature from the University of Oklahoma and received her MA in English at The University of Tulsa in May 2016. Kelley has worked at TU since 2002.

Kelley is currently responsible for executive team planning and monitoring of various consortia and projects; preparing and monitoring the various budgets; coordination of various sub-projects; and planning all aspects of two Advisory Board meetings per consortium per year. She is the primary representative of all consortia to consortia members. Kelley also is responsible for preparing business proposals to various entities to secure future research funding; preparing business reports for presentation to members; supervise Project Coordinator and part-time employees; assist in hiring of post-doctoral and other research associates, technicians, and other staff; oversee all consortia web presence (this is the main source of transferring deliverables to consortia members); and editing of project reports, theses, dissertations and papers for publication in various industry journals.


Jose Aramburu-Tinoco

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Jose Aramburu-Tinoco is a Research Technician for The University of Tulsa (TU). Jose worked at TU from 2004 to 2017 and then joined TU again in March 2018.  He has his Bachelor of Computer Information Systems from The University of Tulsa. 

Jose has spent his entire professional career as a research operations engineer, web designer, computer video/audio support professional, HAZWOPER and has assisted and conducted tests in labs and facilities.

Meet Our Alumni


Randy Dinata

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Experienced Engineering Consultant with flow assurance, artificial lift systems, object-oriented programming, asset integrity and production optimization areas of expertise. Extensive knowledge in multiphase flow behavior and artificial lift systems in horizontal shale wells. Strong engineering professional with a Master’s Degree focused in Petroleum Engineering from University of Tulsa.

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Carolina Vasconcelos Barreto

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With a Bachelor's degree in Chemical Engineering from the Federal University of Rio de Janeiro (UFRJ), Carolina worked six years as a Process Engineer in a company called Promon Engineering. Some of the projects she was involved with were Presalt FPSOs P-66/69 (Petrobras), Atmospheric and Vacuum Distillation Unit (U-2100) of Integrated Petrochemical Complex - Comperj, Pará Alumina Company, among others.

Carolina recently obtained her Master of Science in Petroleum Engineering degree from the University of Tulsa, where she worked as a Research Assistant at Tulsa University Horizontal Well Artificial Lift Projects (TUHWALP). Her M.S. Thesis Project was "Effect of Foamer Delivery Location on Horizontal Wells Deliquification."  It consisted of an experimental investigation of different surfactant injection locations for foam lift in horizontal wells.


Sy Do

Sy Do earned his Ph.D. in Petroleum Engineering from The University of Tulsa.  His interests include multiphase flow and artificial lift.

Sy currently works at TU Horizontal Well Artificial Lift Project where he conducts research experiments in sand transport.  

Sy previously worked for MSI International, Inc.  At MSI he focused on programming for oil and gas production systems.

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Anvar Akhiiartdinov

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Anvar Akhiiartdinov is a Ph.D. research assistant at the Tulsa University Horizontal Well Artificial Lift Projects.  Anvar received his B.E. Degree in Pipeline Engineering from Gubkin Russian State University of Oil and Gas and MS Degree in Process Engineering from the Norwegian University of Science and Technology. 


Anvar’s research interests include pipe flow modeling, fluid-structure interaction, multiphase flow, and artificial lift.  He has a number of publications in his areas of interest.  His current research is focused on the conventional plunger lift experiments and modeling. 


Anvar also has industry experience working in IMS Industries, TNO, and Chevron ETC.

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Ozan Sayman

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Ozan Sayman has a BSc in Mechanical Engineering at Istanbul Technical University.  He recently finished the petroleum engineering MSc program at Univ. of Tulsa.

Ozan has published papers and made presentations at various conferences, about plunger lift and plunger assisted gas lift. He has developed models for plunger lift which includes fall and upstroke mechanics of the plunger, as well as conducted experimental programs on downhole acoustic artificial lift tools and bypass plungers for Chevron at TUCore. 

Ozan also works as an independent consultant for plunger lift operations. His research interests are artificial lift, flow assurance, and data science solutions for production optimization.

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Rafael Nemoto

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Rafael H. Nemoto holds a B.S. degree in Mechatronics Engineering from the University of São Paulo (Brazil), with part of the credits fulfilled at Technische Universität Darmstadt (Germany). He received his D.Sc. degree in Mechanical Engineering also from the University of São Paulo.


Rafael is currently a post-doctoral Research Associate for TUHWALP (TU Horizontal Well Artificial Lift Projects) and TUFFP (TU Fluid Flow Projects). Before joining the research staff at The University of Tulsa, Rafael worked for Baker Hughes in Rio de Janeiro (Brazil) as Lead R&D Engineer for flow assurance and subsea processing. He also worked as a Research Engineer of the department ‘Offshore and Subsea Systems’ at GE Global Research in Rio de Janeiro.


Rafael has experience on multiphase flow, flow assurance, artificial lift, and subsea processing equipment. He has authored nine publications in peer-reviewed journals and international conferences and seven patents.

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Jorge Lopez

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Jorge Lopez earned his B.S. and M.S. degrees in Chemical Engineering from the Universidad de los Andes in Bogota, Colombia, where he helped in the creation of the Multiphase Flow in Pipes research group.

Jorge is working towards my Ph.D. in Petroleum Engineering under Dr. Pereyra's supervision within TU Horizontal Wells Artificial Lift Projects research group (TUHWALP), mainly focusing on the study of downhole separators for artificial lift applications.


Redza Rosli

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Redza Rosli graduated with is M.S.E. degree in Petroleum Engineering at the University of Tulsa. He also earned a B.S. in Petroleum Engineering with a Minor in Math at the University of Tulsa.

Redza has interned at PETRONAS under the department of Center of Excellence working with the Specialized Water Injection team. His current research at TUHWALP focuses on downhole separators and the application of computer vision.

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