Description
During geological sequestration CO2 is likely to react with formation fluids, reservoir rocks and well-bore cement in the injection zone. The acidification of the fluids may result in the dissolution of solid phases and formation of the new solid phases which may cause changes in rock and cement composition. The aim of the project is to determine the rock-cement interactions under simulated reservoir conditions by conducting laboratory-scale geochemical and mineralogical studies. The project will improve the knowledge on the acid gas – cement – formation rock reactions. The results will be published in form of the scientific articles and conference presentations. Scientist and researchers will gain additional information on the physical and chemical characteristics of well cement exposed to acid-gas under geologic sequestration conditions.
Summary of project results
The aim of the project was to determine the rock-cement interactions under simulated reservoir conditions by conducting laboratory-scale geochemical and mineralogical studies. The determination of whether zonal isolation deteriorates or improves through chemical reactions on formation rock and cement contact zone is essential in long-term safety and security of acid gases iniection. The comparison of the obtained results (of experimental and modeling simulation) will benefit in the improvement of computer modeling implementation in the issues of acid gas – cement reactions. The CEMENT project significantly impacted the professional experience of scientific staff, involved in the research, in the field of cement and formation rock degradation. This trend is a growing area of research and is of important applicability in CO2 sequestration activities.
Summary of bilateral results