Reverse Circulation Kill Method for QueLe 4 well Of Tarim Oilfield

With the further development of oil and gas exploration, the difficulty of oil and gas drilling is more and more and the well depth is deeper and deeper. The boreholes are high-pressure and high-temperature and the well control issue has become increasingly prominent. The most important question of well control safety is to select a proper and valid well killing method.This paper introduces the technology of the reverse circulation kill method, presents the calculation method of casting pressure and fray pressure, and compares this method with driller's method and engineer's method when it is combined with the actual data of Quele4 well of Tarim Oilfield. It further illustrates that this killing method is more safe and reliable.