JPT Managed-Pressure Drilling Solves HP/HT Challenges Offshore Vietnam

SPE.org 

MPD systems have built a track record of success in mitigating drilling hazards related to uncertain formation pore pressures and narrow-pressure operating windows common to HP/HT exploration and development wells. In these wells, slow rates of penetration, wellbore-stability issues, ballooning, accuracy of influx-detection systems, and differential sticking can result in well-control problems and nonproductive time (NPT). The Nam Con Son (NCS) basin off the southern coast of Vietnam presents such challenges. It is one of a series of Tertiary rift basins created on Vietnam’s continental shelf as a consequence of the East Sea seafloor spreading.