Sun Baojiang

Simulated Calculation of Well Killing by Partition Method

The partition method is a new technique which is fit for offshore drilling and deep wells with long bare hole on land. Based on the well control characteristics of deep well, multi-phase flowing control equations of well killing process for partition method are established and numerical calculation is given. The simulation results show that when a great amount of formation gas enters the well bore and traditional well control methods cannot be used, partition method can be used to lead to a successful well killing. The more partitions it was divided into, the smaller change of pressure at casing shoe and choke pressure will be. This condition is easy to control the choke valves. But more partitions also result in a long period of well killing. So reasonable partitions should be determined to ensure safe well killing and save time.