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通常,井涌或井漏的探测主要是根据地面测量来确定,如泥浆池增量或减量,再结合突变的泵压和大勾载荷,控压钻井中所用的精密Coriolis流量计等,都是常用的井涌井漏探测方法。而当前利用井下数据进行的电缆钻杆遥测则可能是新一代井涌井漏探测系统。如今可以用高速双向实时钻柱遥测,传输速度达57000位/s,在整个作业过程中( 不仅是循环过程中) ,井下传感器的高速带宽和井下工具的双向通信可以革新整个钻井作业。电缆钻杆遥测沿钻柱分布测量节点,现在只有压力传感器被用作环空中沿钻柱传感器,这些传感器采用自校准实时流动模型和沿钻柱压力测量,将实时压力测量值直接用于一软传感技术中实时评估控压钻井中的气涌,采用卡尔曼滤波( Kalman Filter) 技术,结合多相流动模型,实时评估溢流量,还可同时探测溢流层位的深度。
In general, the detection of a well or a well is mainly based on surface measurements, such as mud pool increment or decrement, combined with abrupt pumping and large load, and precision Coriolis meters used in controlled drilling It is commonly used well leakage detection method. However, the current cable drill telemetry using downhole data may be a new generation of well leakage detection system. Now with high-speed, two-way, real-time drill string telemetry at speeds up to 57,000 bits per second, the entire drilling operation can be revolutionized throughout the job cycle (not just during cycling), high speed bandwidth downhole sensors and two-way communication with downhole tools. Cable drill telemetry distributes the measurement nodes along the drill string, and now only pressure sensors are used as annuli along the drill string sensors. These sensors use a self-calibrating real-time flow model and pressure measurements along the drill string to apply real-time pressure measurements directly to a soft Sensing technology real-time assessment of the pressure surge in pressure-controlled drilling, using Kalman filter (Kalman Filter) technology, combined with multi-phase flow model, real-time assessment of overflow, but also simultaneously detect the depth of the overflow layer.