Considering the hardness,the high drillability grade value and the large angle of bedding in Qingshen gas field,it is more and more important to come to how to drill quickly,avoiding well deviation.

• 庆深气田中下部地层岩石坚硬,可钻性级值较高,地层倾角较大,因此,防斜打快成为庆深气田钻井工作急于解决的首要问题。