摘要
The Gaoping-1 well is the first extended-reach horizontal well with the displacement/vertical depth of 4 operated by the Sinopec Shengli Oilfied Company.For the purpose of reducing and overcoming the downhole torque and drag,well trajectory is effectively controlled by the following key techniques: optimal design of well trajectory,proper selection of lower bottomhole assembly and drilling parameters,engineering guarantee measures,adjustable drilling fluids properties,etc.After well completion,the displacement/vertical depth of this well reached up to be 4.0198 and its lateral section was 3462.07 m long.In conclusion,(1) the single-added track of whipstock with a relatively low build-up rate will be more adaptable for the optimal design of horizontal well trajectory with long lateral sections;(2) the proper selection of bottomhole assembly,drilling parameters,and drilling bits at specific areas will reduce the ratio of slide drilling at the long lateral sections;and(3) water-base drilling fluids will be widely used in the extended-reach wells.