摘要
本文通过对3700补偿中子测井仪在江汉中子测井模型并群检测结果的分析,指出了该仪器仅以其刻度器模拟信号的孔隙度量值为标准将出现视孔隙度明显低于地层孔隙度,从而修正了阿特拉斯公司提供的补偿中子测井响应函数关系曲线和刻度器模拟信号的孔隙度量值.在此基础上,绘制了该仪器的岩性校正图版、井径校正图版、居中与贴壁校正图版。
This paper presents and analyzes the measured results of CNL of Atlas 3700 in JianghanNeutron Calibration Pits. The results show that log derived porosity will be obviously muchlower than formation porosity if the simulative porosity measured in wellsite calibrator is re-garded as standard. Therefore, the response function of CNL provided by Atlas has beenmodified, and the simulative porosity as well. The lithology correction chart, borehole di-ameter correction chart and tool stand-off correction chart have been rebuilt. After thosemodifications, CNL porosity is satisfactory.
