大位移井摩阻扭矩监测方法  

A monitoring method for torque & drag of extended reach wells

作　　者：唐洪林[1] 孙铭新[1] 冯光通[1] 杨春旭[1] 胥豪[1] 

机构地区：[1]中国石化胜利石油工程有限公司钻井工艺研究院

出　　处：《天然气工业》2016年第5期81-86,共6页Natural Gas Industry

基　　金：国家高技术研究发展计划(863计划)项目(编号:2012AA091501)

摘　　要：对于井下摩阻扭矩的监测和控制是事关大位移井钻井成败的关键,但目前对摩阻扭矩的分析还停留在预测阶段,而随钻过程中对其的实时监测和分析尚不成熟。为此,在摩阻扭矩预测分析的基础上,开展了摩阻扭矩的实时监测方法研究:钻进过程中,连续记录接立柱时上提钻具、下放钻具和旋转提离井底时的大钩载荷,记录不同井深条件下复合钻进扭矩值和旋转提离井底扭矩值;将所记录的值标注于摩阻扭矩监测图版上,形成实时监测数据与理论计算数据的对比曲线,并将其用于评价井眼清洗程度、井眼缩径、垮塌等井下情况,及时地掌握钻井液性能变化、井眼轨迹光滑度、减摩降扭工具的使用情况。桩129-1HF井现场监测试验结果表明,在摩阻扭矩较大的井段及时采取循环钻井液、短起下钻、调整钻井液性能、增加润滑剂含量、优化钻具组合等措施,控制摩阻扭矩效果良好,保证了该井安全顺利完钻。结论认为,所建立的摩阻扭矩实时监测方法可为大位移井安全优质高效钻进提供有力的技术支撑。The key to the successful drilling of an extended-reach well lies in the monitoring and control of downhole torque and drag. At present, the analysis on torque and drag is still at the stage of prediction and the real-time monitoring and analysis while drilling is not mature. In this paper, the real-time torque and drag monitoring method was studied after the torque and drag were predicted. In the pro- cess of drilling, the hook loads were continuously recorded for lifting, lowering and rotating off bottom at stand connection. Besides, the torque was recorded for the combined drilling and the rotating off the bottom at different depths. All the recorded values were marked on the torque ＆ drag monitoring chart. In this way, the contrast curve was first drawn between the real-time monitoring data and theoretical calculation data, then was used to evaluate the wellbore conditions （e.g. hole cleaning degree, hole shrinkage and well collapse）, so that the performance of drilling fluids, the smoothness of well trajectories and the service conditions of friction reducing tools could be known about. This method was tested on site in Well Zbuang 129-1HF. It is shown that this well was drilled successfully with its torque and drag controlled effectively by circulating drilling fluids, conducting short trips, adjusting properties of drilling fluids, increasing lubricant con- tent and optimizing bottom hole assemblies at the hole sections with larger torque and drag. It is concluded that this real-time torque and drag monitoring method can provide a powerful technical support for the safe, high-quality and high-efficiency drilling of extended-reach wells.

关 键 词：摩阻扭矩 监测方法 大位移井 井眼清洁 井眼稳定 钻井液性能变化 井眼轨迹光滑度 

分 类 号：TE24[石油与天然气工程—油气井工程]