PRD System (Protecting Reservoir Drill-in Fluid)
PRD system is a new type of clay-free and solid-free fast but weak Gel system. It is a drill-in fluid system suitable for reservoir protection. It can protect the reservoir and has good dynamic sand carrying and static sand suspension capabilities. It can well solve the cuttings bed problem in the highly deviated wells and horizontal wells, and well performs in thee open hole completion. It is usually the first choice of reservoir.
PRD System (Protecting Reservoir Drill-in Fluid) :
Clay-Free Mud system:
Seawater,KCI, HCOO, PAC-LV, Viscosifier, CaCO3 etc.)
Solid-Free Mud system:
Seawater, KCI, HCOO, PAC-LV, Viscosifier, Formate etc.)
Advantage of PRD System (Protecting Reservoir Drill-in Fluid)
Unique rheology: PH control to 7-8
High yield value, effectively carry cuttings
High Low Shear Rate Viscosity (LSRV), effectively preventing solid and Free water from invading into formation and avoiding corrosion to the well wall.
Minimal reservoir damage
Low filtration loss of porous media, effectively controlling the depth of the pollution zone
Low shear rate viscosity＞40,000cp Low shear rate viscosity＜1,000cp
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