垂钻系统单轴稳定平台测量算法  

Measurement algorithm in single-axis stabilized platform of vertical drilling system

作　　者：孙峰[1,2] 王瑞和[1] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266555 [2]中石化胜利石油管理局钻井工艺研究院,山东东营257017

出　　处：《中国石油大学学报（自然科学版）》2011年第4期85-88,92,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'863'高技术研究发展计划项目(2009AA093501);中国石油化工集团公司重大科技攻关项目(JP05011)

摘　　要：针对自动垂直钻井系统中采用的单轴稳定平台,在满足小井斜动态旋转条件下,提出一种新的以三轴加速度计和三轴磁通门测量信号为数据源的井斜方位动态测量算法,并考虑不同倾斜角和钻铤转速等因素的影响,对算法进行仿真研究。结果表明:小角度倾斜的方位角动态测量精度受倾斜角和真实方位角影响,在方位角相同的情况下,倾斜角越大,测量结果的误差越大,而在倾斜角相同的情况下,方位角为90°和270°时测量误差最大,且测量误差曲线随方位角变化呈现正弦变化的特点;经过误差函数补偿后的计算结果与真实值之间的误差曲线基本不受倾斜角、方位角影响,计算精度得到显著提高。理论计算与数值仿真结果均表明该算法有效可行,能够满足自动垂直钻井系统单轴稳定平台井斜方位角动态测量的精度需求。For the single-axis stabilized platform in automatic vertical drilling system,under small inclination angle and dynamical rotation conditions,a new inclination and azimuth dynamical measurement algorithm was proposed based on triple axis accelerator and magnetic fluxgate sensors.Considering the effect of different rotation speeds,inclination angles and other factors,the algorithm was studied by numerical simulation.The results indicate that the dynamical measurement accuracy of small inclination angle is responsive to inclination and true azimuth.At the same azimuth circumstances,measurement errors increase with the increase of the inclination angle.In case of equal inclination,the curves of measurement errors are sinusoid approximately and the error would be the maximum as the azimuth of 90° or 270°.The errors between the real results and the compensation results by error function are little affected by inclination and azimuth,and the computing accuracy is improved significantly.The theoretical calculation and simulation results show the efficient of this algorithm,which can meet the requirements of dynamical measurement accuracy of small inclination of single-axis stabilized platform in automatic vertical drilling system.

关 键 词：垂钻系统 单轴稳定平台 小井斜 动态测量 数值仿真 

分 类 号：TE243[石油与天然气工程—油气井工程]