NAME , title P&A Research on Barrier Materials May 28 th 2020 5/28/2020
University of Stavanger Largest petroleum university in Norway First textbook on P&A is Annually graduating 100 MSc petroleum students written by UiS professors P&A one of our key research areas 5/28/2020
Types of barrier materials - examples Other types: Neat class G cement Expansive cement Settled barite • Creeping shale • Bismuth • Pozzolanic Slurry Geopolymer Thermite plugs • Quick clay Thermosetting resin Pumpable, cement-like materials are the low-hanging fruits. 5/28/2020
The desired barrier material properties How to provide scientific evidence for that a given material comply with the requirements above? 5/28/2020
Contribution to qualification overview Small scale ➔ Medium Scale ➔ Full scale ➔ Field test Materials not satisfying at least one of these will not work. Easy and cheap to disqualify at small scale. 5/28/2020
Contribution to qualification overview 5/28/2020
Measurements – small scale Rheology Consistency (atmospheric and pressurized) Static fluid loss Static fluid gel strength Expansion or shrinkage Uniaxial Compressive Strength (UCS) (UP to 1 Year) Tensile test (UP to 1 Year) Flexibility (UP to 1 Year) Ultrasonic Compressive Strength (UCA) Mud contamination OBM • WBM • 5/28/2020
Measurement – small scale Bond strength Shear Bond Strength (SBS) • Hydraulic Bond Strength (HBS) • Tensile Bond Strength (TBS) • 5/28/2020
Measurements – medium scale 5/28/2020
Geopolymers - SafeRock Developed at UiS since 2012 Properties: Pumpable ✓ 1000 times less permeability than ✓ cement Less than 1% shrinkage ✓ Durable ✓ Low Young’s modulus ✓ Environmentally friendly ✓ 5/28/2020
Geopolymers - SafeRock Ongoing Joint Industry Project sponsored by Total and AkerBP. https://www.youtube.com/watch?v=lhmCQdFLbsw 5/28/2020
Geopolymers - SafeRock JIP focus on first possible application, key activities are : Low temp. applications – Conductor and surface csg. Contamination with WBM and OBM Full-scale testing 5/28/2020
Geopolymers - SafeRock Low temp. applications – Conductor and surface csg. 5/28/2020
Geopolymers - SafeRock Contamination with WBM and OBM 5/28/2020
Geopolymers - SafeRock Full-scale testing (vertical) Example of full- scale test cell made at NORCE’s Ullrigg site 5/28/2020
Thanks for your attention! Contact persons: Øystein Arild (Head of Department): oystein.arild@uis.no Mahmoud Khalifeh (Associate Professor): mahmoud.khalifeh@uis.no 5/28/2020
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