Evaluation of temperature resistance of gelatinized modified starch drilling fluid

Abstract

This chapter evaluates and compares the indoor performance of different concentrations of non gelatinized starch and gelatinized starch in drilling fluid, gelatinized modified starch at 80°C, and then aged at high temperature. Taking the plastic viscosity (PV) and filtration loss (FL) as the main evaluation indexes, a formula with better performance was selected as the main additive and used as the follow-up study. At the same time, the inhibition of gelatinized starch in water-based drilling fluid was investigated.

Keywords

• high temperature
• modified starch
• drilling fluid