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ABSTRACT
This research investigates the suitability of modified corn starch (MCS) as an additive to waterbased drilling fluids, aiming to enhance rheological properties and maintain wellbore stability. The study explores the impact of MCS on key drilling fluid properties, such as rheological behavior, fluid loss control, and filtration properties. Various experiments and analyses were conducted to evaluate the effectiveness of MCS in improving drilling fluid performance under different conditions. Rheological tests, including yield point (YP), plastic viscosity (PV), and gel strength measurements, were carried out to assess the impact of MCS on fluid flow and suspension capabilities. The research also examined the influence of MCS on wellbore stability by studying filter cake formation and permeability. The findings revealed that MCS has a notable influence on drilling fluid properties. It demonstrated its potential as a rheology enhancer, with the ability to modify YP, PV, and gel strength, contributing to better fluid flow and cuttings suspension. Additionally, MCS exhibited promise as a fluid loss control agent, reducing filtration loss and enhancing wellbore stability when appropriately dosed. Overall, this research highlights the potential of modified corn starch as a valuable additive for water-based drilling fluids, offering improvements in rheological performance and wellbore stability. These findings can guide further exploration and utilization of MCS in drilling operations, potentially enhancing efficiency and reducing drilling-related challenges.
