TY - JOUR
TI - Prevention and control of vacuum interval by managed pressure injection in cementing
AU - Fu Jiasheng
AU - Liu Wei
AU - Han Xiaosong
AU - Zhao Qing
AU - Hao Weiwei
AU - Li Ning
JN - Thermal Science
PY - 2024
VL - 28
IS - 4
SP - 3397
EP - 3402
PT - Article
AB - This article uses on-site drilling data and establishes a hydraulic model for  pres­sure-controlled cementing to simulate and analyze the generation  process of the vacuum interval in the wellbore, as well as the changes in  the volume and height of the vacuum interval, bottom hole pressure, and  point of interest pressure over time. This model can optimize and recommend  key parameters such as target wellhead back pressure and displacement based  on the pressure window and drilling param­eters, with the target pressure of  the focus point as the anchor point. Through the hydraulic model of  controlled pressure cementing, the hydraulic parameters and processes of  managed pressure cementing can be optimized and recommended, effectively  ensuring the safety of the cementing process.