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    • 3. 发明申请
    • METHOD AND SYSTEM TO AUTOMATICALLY CORRECT LWD DEPTH MEASUREMENTS
    • 自动校正LWD深度测量的方法和系统
    • WO2009085812A2
    • 2009-07-09
    • PCT/US2008/087143
    • 2008-12-17
    • SCHLUMBERGER CANADA LIMITEDSCHLUMBERGER TECHNOLOGY B.V.PRAD RESEARCH AND DEVELOPMENT LIMITEDSERVICES PETROLIERS SCHLUMBERGERSCHLUMBERGER HOLDINGS LIMITEDBORDAKOV, GeorgiyKOSTIN, Alexander
    • BORDAKOV, GeorgiyKOSTIN, Alexander
    • E21B47/04
    • E21B47/04
    • A method for correcting errors in LWD depths includes performing torque and drag model analysis using drillstring weight, downhole friction, weight on bit, thermal expansion, rig heave and tide to produce a corrected time-depth file, wherein the torque and drag model is automatically calibrated using effective block weight, drillpipe wear, and sliding friction; and correcting time-based LWD data using the corrected time-depth file to produce depth-corrected LWD data. A system for correcting errors in LWD depths includes a processor and a memory that stores a program having instructions for: performing torque and drag model analysis using drillstring weight, downhole friction, weight on bit, thermal expansion, rig heave and tide to produce a corrected time-depth file, wherein the torque and drag model is automatically calibrated using effective block weight, drillpipe wear, and sliding friction; and correcting time- based LWD data using the corrected time-depth file to produce depth-corrected LWD data.
    • 用于校正随钻测井深度中的误差的方法包括使用钻柱重量,井下摩擦,钻压,热膨胀,钻井平台和潮汐来执行扭矩和阻力模型分析以产生经校正的时间深度文件, 其中扭矩和阻力模型使用有效块体重量,钻杆磨损和滑动摩擦自动校准; 和使用校正的时间深度文件校正基于时间的随钻测井数据以产生深度校正的随钻测井数据。 一种用于校正随钻测井深度中的误差的系统包括处理器和存储程序的存储器,所述程序具有用于以下的指令:使用钻柱重量,井下摩擦,钻压,热膨胀,钻机升沉和潮汐来执行扭矩和阻力模型分析以产生校正 时间深度文件,其中扭矩和阻力模型使用有效块体重量,钻杆磨损和滑动摩擦自动校准; 并使用校正的时间深度文件来校正基于时间的随钻测井数据以产生经深度校正的随钻测井数据。