Calfee Halter & Griswold LLP
Wellbore pressure correction method
This invention discloses a method for wellbore pressure correction. The method comprises: measuring a bottom hole pressure using a downhole pressure measurement-while-drilling tool; calculating a predicted bottom hole pressure; and correcting a wellbore pressure using the measured bottom hole pressure and the predicted bottom hole pressure, to achieve managed pressure drilling (MPD). The invention makes up for the defect in the existing art that the difference between a wellbore pressure calculation processing method and the actual downhole pressure is relatively great, and is capable of more quickly and accurately calculating the wellbore pressure in real time so that accurate calculation and real-time correction and control of dynamic wellbore pressure on a narrow density window formation are achieved, thereby meeting the requirement of good bottom hole pressure and the requirement of ensuring safe and quick drilling.
Drilling Research Institute of China National Petroleum Company
E E E E
E21B E21B E21B E21B
inventional inventional inventional inventional
Wei Boqi Xiaoqiang Kai Qingfeng Yingcao Lin
Liu Zhou Zhai Wang Guo Zhou Shi