Alf Kristian Gjerstad

Førsteamanuensis i petroleumsteknologi

Alf Kristian Gjerstad

Kontakt

E-post: alf.k.gjerstad@uis.no

Rom: KE E-330

Sted: Stavanger

Organisasjonsenhet

Det teknisk-naturvitenskapelige fakultet

Institutt for energi- og petroleumsteknologi

Kort om meg

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

 

Følg meg på nett

LinkedIn

Publikasjoner

Vitenskapelige publikasjoner

Gjerstad, Kristian

(2024)

Water density–pressure–temperature modeling for drilling fluids in real-time HPHT applications.

Geoenergy Science and Engineering.

ISSN 2949-8929.

Volum 244.

DOI: 10.1016/j.geoen.2024.213420

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.

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.