Particle Size Distribution Selection of CaCO＿3 in Drill-In Fluids: Theory and Applications

摘要

Bridging agents are used in Drill-In fluids to prevent problemsrnof massive loss circulation to the formation and formationrndamage through fine solids migration that invade the hydraulicrnflow channels of the reservoir rock. Also, thick cake build uprnthat induces a differential sticking problem, as well as torquernand drag of the drill string are avoided.rnThe first step when selecting the particle size distribution ofrnbridging agents (specifically CaCO＿3) in Drill-In fluids is thernpetrophysical characterization and pore geometryrndetermination of the rock. In consolidated sands, the criterionrnof selection of particle size of bridging agents is: 1/7 Dporernthroat