The Development and Prospect of Supercritical Carbon Dioxide Drilling

Abstract

Supercritical carbon dioxide (SC-CO₂) as a new drilling fluid had developed rapidly from the end of last century. The use of SC-CO₂ drilling can not only obtain the low threshold pressure, high rate of penetration, and excellent hole cleaning capabilities, but also enhance oil recovery and protect reservoir effectively in the low-permeability reservoir. Thermodynamic and thermophysical properties of SC-CO₂ were studied. Meanwhile, the present situation, advantages, and development direction of SC-CO₂ drilling technology were analyzed. The results indicated that SC-CO₂ drilling will bring an innovation in the drilling technology.

Keywords:

• coiled tubing
• development and prospect
• pressure
• supercritical carbon dioxide
• underbalanced drilling