• Abhinav Gupta
• Ajay Kumar Sahu

Aphrons are colloidal dispersions of micro-bubbles with diameter ranging from 10 to 100 µm. An aphron is made up of a core, which is often spherical of an internal phase encapsulated in a thin shell. In the case of a gaseous core, this structure is called colloidal gas aphron (CAG’s). A proper designed drilling fluid is highly desired to improve the rate of penetration and at the same time be effective for depleted and high permeability reservoirs. In this work, we have prepared aphron based drilling fluids by using cationic and anionic surfactants and various tests as mud density, rheological and filtration characteristics were carried out on the developed apron based drilling fluids. It was observed that by using aphron based fluid, with an increase in the mud density, apparent viscosity, yield point, and decrease in plastic viscosity of the drilling fluid significantly improved the penetration rate. Further it has been observed that the cationic aphron based fluid shows better results in terms of rheology, filtration loss and stability. This study would be effectively applicable in the field of drilling fluid technology with increase the rate of penetration saving both time and cost.

aphron, mud density, rheological characteristics, rate of penetration.

"Optimization of the Rheological Properties of Colloidal Gas Aphron (CGA) Based Drilling Fluid to increase the penetration rate", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.556-563, July-2018, Available :http://www.jetir.org/papers/JETIR1807681.pdf

"Optimization of the Rheological Properties of Colloidal Gas Aphron (CGA) Based Drilling Fluid to increase the penetration rate", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp556-563, July-2018, Available at : http://www.jetir.org/papers/JETIR1807681.pdf