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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。
One of the reasons for the well trajectory measurement is that it is impossible to accurately derive the trajectory data and trajectory shape. One of the reasons is that the measurement error sources cause the inaccurate measurement results. Another reason is that there is currently no calculation method to calculate the trajectory accurately Describe well trajectory. In the measurement process, many studies focus on a single measurement point to study, did not consider the measurement error accumulation. With the wide application of MWD instruments, a single measuring point can not accurately describe the probability of errors with the drilling process and the accumulated error conditions. By analyzing the error causes of the measuring instruments, it is considered that during the drilling process In the probability density of the inclinometer error produced by the precision of the instrument, the single measurement point is not analyzed, but the measurement between the measurement points is analyzed to obtain that during the drilling process, as the well depth increases, the single-track Probability Density of Different Confidence Factors of Error Ellipse. Through the simulation, the curve of probability density is obtained, and the probability density of different confidence factors is directly expressed.