Alf Kristian Gjerstad | Universitetet i Stavanger

Alf Kristian Gjerstad

Stavanger

Det teknisk-naturvitenskapelige fakultet
Institutt for energi- og petroleumsteknologi

KE E-330

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Bio

Research interests

Automated drilling

Optimization of rate of penetration (ROP)
Optimization of tripping speed and pump start up etc.
Detecting and mitigating hazardous events (kick/loss, pack-off, string vibrations, diff. sticking, etc.)

Computational modeling and simulation for practical use

Flow modeling - including rheology
Mechanical modeling
Multiphase flow (liquid, gas, cuttings)

Geothermal drilling

Transfer of knowledge and technology between the disciplines

Publikasjoner

Tilbake

Vitenskapelige publikasjoner
- Shipton, Peter; Amish, Mohamed; Gjerstad, Kristian
  
  (2023)
  Using Transient Modeling to Define the Effects of Heave on Wellsite Operations.
  SPE Drilling & Completion.
  
  ISSN 1064-6671.
  
  Volum 38.
  
  Hefte 3.
  
  s.486-501.
  
  DOI: 10.2118/214691-PA
- Gjerstad, Kristian
  
  (2023)
  Relating stress-overshoot measurements of drilling fluids to rheological properties by utilizing inertia calculations, oscillatory tests and modelling. I: ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering : Volume 2: Structures, Safety, and Reliability.
  The American Society of Mechanical Engineers (ASME).
  
  ISBN 978-0-7918-8684-7.
  
  DOI: 10.1115/OMAE2023-105303
- Mazhar, Jahanzaib; Usman, Muhammad; Gjerstad, Kristian
  
  (2022)
  
  Analysis of Gelling Properties of Drilling Fluid and Improved Modelling of Gelling Behaviour. I: Annual Transactions the Nordic Rheology Society.
  
  ISBN 978-82-692721-2-3.
  
  s.99-110.
- Gjerstad, Alf Kristian; Aamo, Ole Morten
  
  (2021)
  A dynamic model of two-phase flow for simulating gas kick and facilitating model-based control in drilling operations.
  Journal of Petroleum Science and Engineering.
  
  ISSN 0920-4105.
  
  Volum 205.
  
  s.1-17.
  
  DOI: 10.1016/j.petrol.2021.108902
- Daireaux, Benoit; Ambrus, Adrian; Carlsen, Liv; Mihai, Rodica G.; Gjerstad, Alf Kristian; Balov, Mohsen Karimi
  
  (2021)
  Development, Testing and Validation of an Adaptive Drilling Optimization System. I: IADC/SPE Managed Pressure Drilling & Underbalanced Operations Conference & Exhibition, Virtual, September 2021.
  Society of Petroleum Engineers.
  
  ISBN 978-1-61399-742-0.
  
  DOI: 10.2118/204083-MS
- Gjerstad, Alf Kristian; Time, Rune Wiggo
  
  (2015)
  Simplified explicit flow equations for Herschel–Bulkley fluids in Couette–Poiseuille flow - For real–time surge and swab modelling in drilling.
  SPE Journal.
  
  ISSN 1086-055X.
  
  Volum 20.
  
  Hefte 3.
  
  s.610-627.
  
  DOI: 10.2118/170246-PA
- Gjerstad, Alf Kristian; Ydstie, B.Erik; Time, Rune Wiggo; Bjørkevoll, Knut Steinar
  
  (2013)
  An Explicit and Continuously Differentiable Flow Equation for Non-Newtonian Fluids in Pipes.
  SPE Journal.
  
  ISSN 1086-055X.
  
  Volum 19.
  
  Hefte 1.
  
  s.78-87.
  
  DOI: 10.2118/165930-PA
- Gjerstad, Alf Kristian
  
  (2012)
  
  Simplified Modelling of Downhole Pressure Surges for Bingham Fluids in Tripping Operations. I: SPE Annual Technical Conference and Exhibition, 8-10 October 2012, San Antonio, Texas, USA.
  
  Society of Petroleum Engineers.
  
  ISBN 978-1-61399-213-5.
Bøker og kapitler
Formidling
- Gjerstad, Kristian
  
  (2023)
  
  Relating Stress-Overshoot Measurements Of Drilling Fluids To Rheological Properties By Utilizing Inertia Calculations, Oscillatory Tests And Modelling.
  
  42nd International Conference on Ocean, Offshore & Arctic Engineering;
  
  2023-06-11 - 2023-06-16.
- Mazhar, Jahanzaib; Gjerstad, Kristian; Usman, Mohammad
  
  (2022)
  
  Analysis of gelling properties of drilling fluid and improved modelling of gelling behaviour.
  
  The Nordic Rheology Conference 2022;
  
  2022-10-08 - 2022-10-10.
- Gjerstad, Kristian; Bergerud, Ronny; Thorsen, Stig Tore
  
  (2020)
  
  Exploiting the Full Potential in Automated Drilling Control by Increased Data Exchange and Multi Disciplinary Collaboration.
  
  SPE Annual Technical Conference & Exhibition;
  
  2020-10-05 - 2020-10-07.
- Hatletvedt, John Kenneth; Gjerstad, Kristian; Zhou, Jing
  
  (2018)
  
  Modelling of a Hydro-Pneumatic System for Heave Compensation.
  
  IEEE Conference on Industrial Electronics and Applications (ICIEA);
  
  2018-05-31 - 2018-06-02.
Kunstnerisk produksjon
Kommersialisering