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Experimental Investigation of Water and Oil Based Colloidal Gas Aphron Drilling Fluid Performance Containing Nanoparticles in Formation Damage Reduction
, M.Sc. Thesis Sharif University of Technology ; Ghazanfari, Mohammad Hossein (Supervisor) ; Rashtchian, Davood (Supervisor)
Abstract
In recent years, utilizing the colloidal gas aphron (CGA) drilling fluids is getting more and more commonplace due to their little formation damage and filtration loss. This study tries to investigate the effect of presence of nanoparticles and their type (hydrophobicity) on stability and performance of water and oil based CGA drilling fluids. This is done through analyzing stability, filtration, rheology, and pore blockage tests. Water and oil based CGA drilling fluids consisted of stabilizer, surfactant, and nanoparticles are generated and through examining of the effects of polymer, surfactant, and nanoparticle concentrations, the optimum formulation is obtained. High pressure-high...
Improvement of non-aqueous colloidal gas aphron-based drilling fluids properties: role of hydrophobic nanoparticles
, Article Journal of Natural Gas Science and Engineering ; Volume 42 , 2017 , Pages 1-12 ; 18755100 (ISSN) ; Ghazanfari, M. H ; Sharif University of Technology
Abstract
Application of the colloidal gas aphrons (CGAs) in minimizing formation damage by plugging pore mechanism is now wildly accepted due to numerous successful field experience. One of the pivotal factors which affects the pore blockage ability of micro-bubbles is their stability. This experimental study tries to investigate the possible synergistic effect of nanoparticles on improving the stability and other properties of non-aqueous CGA drilling fluids, in both bulk and porous media. In particular, two types of hydrophobic nanoparticles including silicon dioxide nanopowder coated with 2 wt% Silane and nanoclay, in presence of a treated version of bentonite (Bentone 34) as a stabilizer and...