随钻测斜仪器产生误差的概率密度分析  

Analysis on probability density for error caused by measuring equipment while drilling

作　　者：田龙[1] 逯广东[1] 于晓文[1] 侯兆凯[1] 

机构地区：[1]东北石油大学,黑龙江大庆163318

出　　处：《能源与环保》2017年第8期63-66,72,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家科技重大专项(2016ZX05020-006)

摘　　要：在井眼轨迹的测量中,目前无法精确得出其轨迹数据和轨迹形状,其中一个原因是测量的几种误差源导致测量结果不精确,另外一个原因是目前没有一个计算轨迹的计算方法能准确描述井眼轨迹。在测量过程中,许多研究都是围绕着单一的测点进行研究,没有去考虑测段的误差累积。随着随钻测量仪器的广泛应用,单一测点并不能精确表述出随着钻进过程中产生的误差的概率以及累加后的误差状况,通过分析测量仪器产生的误差原因,考虑在钻进过程中由仪器精度所产生的测斜误差的概率密度,不对单一测点进行分析,而是对测点间测段进行分析,以得出在钻进过程中,随着井深的增加,单一轨迹的误差椭圆不同置信因子的概率密度。并通过仿真模拟,得出概率密度变化曲线,直观表达出不同置信因子的概率密度变化情况。During the measurement of the well track,trajectory data and trajectory shape can not be obtained accurately.One of the reason is that there was several error source which generate a inaccuracy result,another is that there is not a computing method can describe well track currently at present.In the process of measurement,many studies are around a single point for research,seldom consider the error accumulation of the measurement section.With the wide application of MWD apparatus,with a single measuring point and cannot accurately describe the drilling process of error probability and cumulative error.By analyzing the reasons for error,the measuring instrument was considered in the process of drilling resulting from instrument accuracy survey error probability density.Not a single point analysis,but the measuring point between measurement section were analyzed,whose purpose was to obtain the probability density of different confidence factors about the error ellipse of a single trajectory,through the analogue simulation,the changing curves of the probability density could be achieved,which can show the the changing conditions of the probability density with different confidence factors.

关 键 词：井眼轨迹 测斜仪器 概率密度 误差 MATLAB 

分 类 号：TE927[石油与天然气工程—石油机械设备]