CAJ | 학술논문

注水泥塞侧钻是在原井眼一定位置注水泥填井，再侧钻出新井眼的钻井工艺。文昌某油田一口水平开发井因?215.9 mm井眼钻遇油层显示不理想，决定在裸眼注水泥塞后进行侧钻。为克服侧钻点深、地层强度高、半潜式平台升沉大等难点，采用了短保径、强侧向攻击性能的PDC钻头和Power Drive旋转导向工具，通过滑槽、造台阶及控时钻进等技术措施控制井眼轨迹，利用岩屑录井和近钻头井斜等资料及时监控侧钻实施情况，成功完成了侧钻作业。该侧钻井作业顺利，轨迹平滑，后续防砂筛管顺利下入，为今后半潜式平台水平井侧钻作业提供了较好的借鉴经验。
주수니새측찬시재원정안일정위치주수니전정，재측찬출신정안적찬정공예。문창모유전일구수평개발정인?215.9 mm정안찬우유층현시불이상，결정재라안주수니새후진행측찬。위극복측찬점심、지층강도고、반잠식평태승침대등난점，채용료단보경、강측향공격성능적PDC찬두화Power Drive선전도향공구，통과활조、조태계급공시찬진등기술조시공제정안궤적，이용암설록정화근찬두정사등자료급시감공측찬실시정황，성공완성료측찬작업。해측찬정작업순리，궤적평활，후속방사사관순리하입，위금후반잠식평태수평정측찬작업제공료교호적차감경험。
Sidetrack with cement plug is a drilling technology that dills a new wellbore after placement of cement plug in the origi-nal open hole. Due to unfavorable oil indications of the reservoir encountered by ?215.9 mm wellbore, a horizontal development well located in Wenchang Oilifeld was sidetracked after placing cement plug in the openhole. In order to overcome such dififculties such as large depth of sidetrack point, high formation strength, large heaving of semi-submersible drilling platform, etc., this sidetracking opera-tion was successfully completed by using short gage PDC bit with strong side attacking ability and rotating steering tool Power Drive to dill the sidetrack hole, using sliding groove, creating steps and controlled drilling to control the well trajectory, and using cuttings logging and near bit inclination to monitor the realtime sidetracking job. The successful execution of this sidetracking job, the smooth well trajectory and the successful runing of subsequent sand-control screens, provide useful references for the sidetracking operations for horizontal open hole from semi-submersible drilling platform in the future.