Levantamento teórico do efeito da adição de materiais pozolânicos em sistemas de pastas de cimento para poços de petróleo

Abstract

The difficulty of exploring the pre-salt deposits has led to the need to make new materials capable of withstanding the inclement weather and the intrinsic environmental conditions of this region of production. This oil basin is in a marine environment and is dominated by saline structures from the evaporation of the sea, structures that can cause imprisonment of the drill due to the instability of the well. In order to meet the needs of operating conditions, Portland cement is used to insulate and support the coating tubes, making it difficult or even preventing the undesirable flow of fluids, as well as providing support to improve stability. In this way, a theoretical survey of the clarification of the oil wells and the pozzolanic materials used by the cement industry was done, in an attempt to select the best pozzolan option from a vegetal residue to be studied, being able to promote a considerable increase of the mechanical properties of the cement through the pozzolanic reaction. The result of the present work was satisfactory, since it was possible to verify a very relevant pozzolanic activity index of the banana leaf ash; which also presents good results of compressive strength according to the literature, besides being an ecologically viable option, as its use causes a decrease in the consumption of cement and increases the reuse of waste.