中短半径井眼固井防砂一体化管柱研究与试验

为了解决渤海油田中短半径裸眼井固井防砂一体化作业无适用管柱的问题，针对渤海油田的开发情况与技术现状，设计了一套适用于中短半径井眼的固井防砂一体化管柱，对其安全性、通过性的分析结果发现:该管柱在下入过程中不会出现螺旋弯曲，安全性达到了要求；可以顺利通过最大狗腿度为19.28°/30 m、曲率半径为89.20 m的井眼。试验井试验和现场试验均表明:中短半径井眼固井防砂一体化管柱的安全性和通过性达到了设计要求，能实现实现一趟钻完成上部井段固井作业和下部储层段选择性固井和砾石充填防砂作业的功能，能够满足渤海油田中短半径裸眼井实施固井防砂一体化作业的需求。 

Research and Testing of the Integrated String for Cementing and Controlling Sand in a Medium-Short Radius Wellbore

In order to solve the problem that there is no applicable integrated cementing/sand control pipe string for a medium-short radius open hole in Bohai Oilfield, a set of such pipe string suitable for medium-short radius wellbore was designed based on development and technical status of Bohai Oilfield, which analyzed its safety and passability. The results suggested that this pipe string would not spirally bend in the process of running in hole, the safety could be acceptable, and it could smoothly pass through the wellbore with a maximum dogleg of 19.28°/30 m and curvature radius of 89.20 m. Both the results of testing well and field test showed that the safety and passability of the integrated cementing/sand control pipe string for the medium-short radius open hole met the requirement of design. They also demonstrated that the cementing of the upper hole section and the selective cementing/gravel packing sand control of lower reservoir section can be achieved in one run, which can fulfill the integrated cementing/sand control for the medium-short radius open hole in Bohai Oilfield effectively.