Ultra-high temperature drilling fluid provides stable rheology

摘要

Thin filter cake produces a slick wellbore surface and reduces NPT by avoiding stuck logging tools. The ultra-high wellbore temperatures found in many of the plays around the world today challenge drillers to maintain wellbore stability throughout the drilling and evaluation phases. For the drillbit with its associated bottomhole assembly to be able to reach formations with extreme temperatures, the drilling fluid must be engineered to withstand sustained high-temperature environments. Wells must be controlled, and it is critical to prevent drilling fluids-related issues during drilling and tripping that could lead to wellbore instability. Furthermore, wellbore conditions must be optimized so that formation evaluation can be performed with the highest quality logging measurements. To address this challenge, M-I SWACO has developed the RHADIANT ultra-high temperature nonaqueous drilling fluid system. The ultra-high temperature drilling fluid system can be applied with various synthetic- and mineral-based fluid chemistries, providing the flexibility to meet specific downhole and environmental demands.