Formulação de grautes leves para a cimentação de poços de petróleo onshore

摘要

Grautes are dry mixes with hydraulic characteristics widely used in construction. Thismaterial comprises cement, mineral additives and dosed in accordance with the desiredproperties. The use of grautes in cementing oil wells potentially increases the precision in thecomposition of the mixture, since it is requires only the addition of the mixing water before itspumping. Such benefit may be availed in cementing wells since the formulations grautes meetthe temperature and pressure characteristics typical of wells. The objective of this study is toevaluate the effect of adding different percentages of industrial minerals properties of lightgrautes for onshore oil wells. For the formulation of the employees were grautes lightindustrial minerals and waste minerals abundant in the Northeast, in addiction to Portlandcement and chemical additives Special class. Grautes were formulated with densities between1.55 g/cm3 (13.0 lb/gal) and 1.68 g/cm3 (14 lb/gal). Tests results showed that grautes withhigher density in the range studied meet the specifications for cementation of shallow wellsonshore. The compositions lighter can also be adjusted for applying the material in thecementation of oil wells