井筒瞬时波动压力变化规律研究

Based on theory of compressible fluid dynamics, mathematical model was proposed for transient surge pressure in wellbore. Numerical solution can be obtained for transient surge pressure in wellbore during round trip or casing running operation. The calculations results show that transient surge pressure in wellbore depend on the acceleration of round trip or casing running. Periodic oscillation also can be indicated from transient surge pressure curves. It is benefit for Safety Drilling and cementing operation to control acceleration of round trip or casing running by avoiding Over-high additional pressure due to transient surge pressure in wellbore.