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research-article

GEOPOLYMERS AS AN ALTERNATIVE FOR OIL WELL CEMENTING APPLICATIONS: A REVIEW OF ADVANTAGES AND CONCERNS

[+] Author and Article Information
Mahmoud Khalifeh

University of Stavanger, Stavanger, Norway
mahmoud.khalifeh@uis.no

Arild Saasen

University of Stavanger, Stavanger, Norway
arild.saasen@uis.no

Helge Hodne

University of Stavanger, Stavanger, Norway
helge.hodne@uis.no

Rune God⊘y

Statoil, Stavanger, Norway
rugo@statoil.com

Torbj⊘rn Vrålstad

SINTEF Petroleum, Trondheim, Norway
torbjorn.vralstad@sintef.no

1Corresponding author.

ASME doi:10.1115/1.4040192 History: Received October 17, 2017; Revised May 01, 2018

Abstract

Geopolymers, being inorganic polymers created from rock sources, were evaluated as an alternative to Portland cement. To evaluate their usability some properties of a selected geopolymer were measured and compared with those from a neat class G Portland cement. The geopolymeric slurries showed a non-Newtonian viscosity behavior with a measurable, albeit low, yield stress. The pumpability measurements using atmospheric and pressurized consistometer showed an adequate set profile for both the geopolymer and cement sample. Static fluid loss test show that the geopolymeric slurries experienced a lower fluid loss compared to that of the Portland cement. The shrinkage factor for the geopolymers was reduced (expanded) as the downhole temperature was ramped up. The shrinkage of the Portland cement sample proceeded only with a lower rate. Tensile strength of the geopolymers was approximately 5% of their compressive strength; however, this value for Portland cement was approximately 10% of its compressive strength. Finally, shear bond strength of geopolymers would benefit from improvement.

Copyright (c) 2018 by ASME
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