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首页> 外文期刊>IEEE Transactions on Instrumentation and Measurement >Continuous Measurement-While-Drilling Utilizing Strap-Down Multi-Model Surveying System
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Continuous Measurement-While-Drilling Utilizing Strap-Down Multi-Model Surveying System

机译：利用带式多模型测量系统进行连续测量-随钻钻探

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摘要

In the oil drilling process, measurement-while-drilling system is usually used to provide real-time monitoring of the position and orientation of the bottom hole. Usually the bottom drill string attitude is measured on the condition that the drill string is static. Particularly, in rotary steerable drilling application, it is a challenging problem to accurately measure the spatial attitude (inclination, azimuth, and tool face) of the bottom drilling tool with the drill string rotating. A set of “strap-down” measurement system was developed in this paper, the triaxial accelerometer and triaxial fluxgate were installed near the bit, and real-time well deviation and azimuth can been measured. Laboratory experiments show that the dynamic solver methods will meet the project requirements. However, according to the drilling field tests, playback analysis on storage data of the underground measurement indicates that drill string vibration is the main reason for measurement errors. So, by setting a time window, the real-time measurement of the accelerometer and the flux gate signal are processed and analyzed, the movement patterns of the rotary drilling tool at the bottom were judged within the time window. Stick-slip phenomenon is utilized to improve the measurement accuracy and to reduce the impact of lateral vibration of the drilling string on the measurement system. We could take advantage of stick-slip phenomenon because of it cannot be avoided completely, although it should be avoided in order to improve the drilling string operating life. Simulation results showed that recommended dynamic survey approach could effectively enhance measurement precision, and deduce effect of vibration on resolve results.
机译：在石油钻探过程中，随钻测量系统通常用于实时监控井眼的位置和方向。通常，在钻柱为静态的条件下测量底部钻柱的姿态。特别地，在旋转导向钻井应用中，随着钻柱旋转准确地测量底部钻井工具的空间姿态（倾斜度，方位角和工具面）是一个具有挑战性的问题。本文开发了一套“向下”测量系统，在钻头附近安装了三轴加速度计和三轴磁通门，可以测量实时井斜和方位角。实验室实验表明，动态求解器方法将满足项目要求。然而，根据钻探现场测试，对地下测量数据的回放分析表明，钻柱振动是测量误差的主要原因。因此，通过设置一个时间窗口，对加速度计的实时测量值和磁通门信号进行处理和分析，在该时间窗口内判断底部旋转钻具的运动方式。利用粘滑现象来提高测量精度并减少钻柱的横向振动对测量系统的影响。我们可以利用粘滑现象，因为它不能完全避免，尽管为了提高钻柱的使用寿命应该避免这种现象。仿真结果表明，推荐的动态测量方法可以有效地提高测量精度，并推论振动对解析结果的影响。

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