| Summary: | Geopolymers are a cementitious material that has been under study for many years. The material is noticed as a potential full replacement for traditional cementitious material both in construction and petroleum industry. The applicability of geopolymer material in the oil & gas industry, for well cementing and zonal isolation applications, is dependent on the development of chemical admixtures that can enhance performance and prepare the material for downhole conditions. Many admixtures are available in literature, however no inclusive study has been presented for their efficiency and applicability yet under a variety of temperatures from low to elevated. The results are highly dependable on the source of solid precursor, which in this case is granite-based geopolymer. In this study, chemical admixtures of different roles have been examined on granite-based geopolymer material for oil & gas applications. The solid precursor mix design was previously developed inhouse at the University of Stavanger. The study focuses on the applicability of chemical admixtures using cement testing equipment following on available standards of cement testing to create a realistic comparison with traditional cement. The study touches up on both, applicability in the field under downhole conditions and scientific analysis of chemical reactions triggered by chemical admixtures. This thesis is part of the SafeRock Project which is in collaboration between UiS and operator and service companies. Thus, the need to present efficient admixtures and focus on their behavior in downhole conditions was a necessity to progress through the project. This work is composed of a review section describing the work in this research study and published articles that dive in-depth into the scientific findings. The papers are attached in the appendix and labeled using roman numbers. The outcome of this research can be summarized by the following papers: Paper I: A variety of chemical admixtures were tested with the objective of finding a ...
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