engleski

Avoidance of Formation Damage by Application of Proper Drill-In Fluid (Case Study of a Mature Field)

Horizontal well-1H was drilled in a mature field in Croatia with an extended open hole interval and a high differential pressure. As a result, differential sticking has occurred when drilling the horizontal section. This was the first well to be drilled in that area with application of a drill-in fluid included specially sized calcium carbonate bridging agent with a blend of viscosifying and filtration control polymers. To identify the best drill-in fluid composition for the horizontal section, three compositions were evaluated based on fluid-loss control and plugging properties, low-shear rheology (LSRV) and formation damage potential.

formation damage; drill-in fluids; horizontal well

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