随钻密度仪器结构及参数标定误差分析

Calibration and Error Analysis of Density While Drilling Instrument Parameters

介绍了随钻密度仪器探测器部分的结构,同时为了研究随钻密度仪器响应参数的标定和误差分析,采用了最小二乘法对两支标准仪器的采集数据进行了回归分析,给出了仪器系数的标定和误差分析过程。研究得出,密度和计数率对数值有很好的线性关系,密度范围在1.1~3.1g/cm^(3)的地层中,其测量准确度±0.025g/cm^(3),统计误差在30s情况下为±0.015g/cm^(3)。

This paper introduces the structure of the detector of the density while drilling instrument,in order to study the calibration and error analysis of the response parameters of density while drilling instrument,this paper uses the least square method to carry out regression analysis on the data collected by two standard instruments,and gives the calibration and error analysis process of the instrument coefficient.The results show that there is a good linear relationship between density and logarithm of count rate.In the formation with density range of 1.1~3.1 g/cm^(3),the measurement accuracy is±0.025g/cm^(3),and the statistical error is±0.015 g/cm^(3) in 30 s.