STUDIES OF WEIGHTING AGENTS IN HIGH TEMPERATURE WATER BASE MUD (HTWBM)

This project is about studies of weighting agent in High Temperature Water
Base Mud (HTWBM). As the name suggested, the high temperature water base mud
(HTWBM) is designed to drill wells with extreme temperature, often together with the
high pressure conditions. The 17 ppg drilling fluid system to be tested at 250"F has been
chosen for this project . The API Barite that has been used as the weighting agent in
High Temperature Water Base Mud (HTWBM) has a density of 4.39 Specific Gravity.
But nowadays, in reality it is common that API Barite provide in actual drilling has a
density of 4.2 Specific Gravity. Thus, in this study, different types of weighting agent
such as Fine Grind Barite, High Purity Barite, Heamatite and Micromax are evaluated.
These weighting agent materials were blended in a ratio with API Barite to study the
trend and impact of each weighting material in High Temperature Water Base Mud
(HTWBM) in order to enhance the rheology of the system.