超深侧钻水平井测井工艺在塔河油田的应用

系统分析塔河油田超深侧钻水平井测井作业过程的施工难点,主要包括湿接头对接成功率低、仪器温度性能难以得到有效保证、仪器组合方式受到限制、施工过程中会存在一些井下风险等因素。从井筒准备、仪器串性能检测与组合、施工过程控制、井口电缆防护等4个方面入手,形成较完善的超深侧钻水平井测井工艺和配套施工方案。超深侧钻水平井测井如果井底温度超出了常规仪器175℃/140MPa的工作范围,应使用高温仪器进行施工;施工前应认真检测仪器的温度性能;采取高温烘箱检测法时其加温温度应提高至175℃;井口电缆防碰装置对钻具输送时测井电缆在井口的安全起到了非常有效的保护;现场多个施工单位之间的紧密配合也是安全顺利取全取准测井资料的关键因素之一。该工艺能够应用到水平井和复杂深井直井施工中。超深侧钻水平井测井工艺在塔河油田先后完成近40井次的施工任务,一次施工成功率达到90%。

The Appliacation of The Ultra-Deep Sidetrack Horizontal Well Logging Technology in Tahe Oilfield

There are some difficulties in logging operations in the ultra-deep sidetracked horizontal wells in Tahe oilfield,such as poor wet-connector docking,strict tool temperature-resistant performance,limited logging tool combination and unknown downhole risks while conveying the drilling strings.To solve the above problems,proposed is a new and more complete ultra-deep sidetracked horizontal well logging technique and its supporting logging program,which includes wellbore preparation,tool performance test and combination,logging process control and protection of the wellhead cable.If the downhole temperature is above 175 ℃/140 MPa,we should use higher temperature-resistant logging tool;the tool’s temperature performance must be carfully tested before logging operations;if the high temperature drying over testing method is used,the tool’s temperature should be warmed up to 175 ℃.The anti-collision device of well head cable can effectively protect the logging cable during the drilling tool conveying.Close cooperation among the in-situ logging units is also important for obtaining complete and accuracy log data.This technology has been applied in Tahe oilfield for 40 times,and the success rate of one log run is 90%.This technology can not only be used to the log operation of the horizontal wells but also to logging operation of some complex deep straight wells.