Particle size is also important for drilling fluid preparation as it is a significant variable for the components of drilling muds, affecting the way in which the particles interact with the surrounding geology as well as the rheological properties of the mud system. Particle size measurement therefore plays an important role in formulating high-performance drilling muds.
Particles smaller than the pore size of the surrounding geological formation will bridge rock pores during mud circulation, leading to the formation of a filter cake that prevents egress of fluids from the well during drilling. This is an important function of the mud as the cake protects the surrounding rock from damage while simultaneously preventing fluid loss and stabilizing the well. It is particularly important when drilling through shales, which are highly prone to fluid invasion and difficult to drill without excessive fluid and associated pressure loss.
Careful determination of the optimum particle size is essential as very small particulates may themselves penetrate the surrounding rock formation, blocking pores. This can cause irreversible damage to the production zone.
Petroleum Palace Group not only offers particle size determination for commonly used materials like barite and calcium carbonate, but also provide recommendations for mud preparation and enhancement chemicals.