Development of a novel high density completion fluid with CuO nanoparticle as promising additive to improve the rheological properties

We explore a novel 'High-Density Nano based Completion Fluid (NBCF) formulation using Magnesium Bromide and copper oxide (CuO) NPs in the aqueous medium. Our work mainly focuses on investigating variation in the rheological properties due to the influence of using CuO NPs on the behavior of MgBr2 based base completion fluid at different ranges of temperature (80 degrees F to 192 degrees F). Formulated NBCF density has shown maximum density of 1.80 s g at ambient temperature. This result clearly gives a breakthrough on the density limit of base completion fluid (BCF) (s.g. 1.61). Developed NBCF has shown with improved a reasonably solid free/clear fluid as there is no settling of particles is observed at the bottom of sample and also exhibits a high value of specific gravity which will results in suitable CF. Prepared NBCF pH value are in alkaline region (pH 8.2), which is one of the requirements of completion fluid. BCF brine usually exhibits a favorable viscosity performance from 1 to 20 mPas, and following close to Bingham plastic model. NBCF has a maximum viscosity of 67 mPas with a density of 1.8 g/cm3 at 190 degrees F. The Herschel Bulkley model had shown a better rheological data fitting of the CuO NPs based CF than the Bingham plastic model. This study offers a broad experimental interpretation of High density completion fluids. The copper oxide NPs has shown good potential to enhance completion fluid properties and suitable for providing productive completion processes with minimal formation damage in formation.