一种新型岩性密度测井仪数据采集处理电路设计

Design of Data Acquisition and Processing Circuit for a New Litho-density Logging Tool

提出一种应用于岩性密度测井仪器先采集再处理的新方法,通过核脉冲数字化处理方案完成新型岩性密度测井数据采集处理电路设计。对新仪器进行室内数据采集性能测试和室外实验测试。相比采用先处理再采集的方法的常规岩性密度测井仪器,采用该新方法研制的岩性密度测井仪器具有更高的精度(0.015g/cm3),同时兼备更佳的性能稳定性,测井工程曲线与国外仪器吻合良好。

Proposed is a new data pre-acquiring ＆ post-processing method for the new litho- density logging tool. The data acquisition and processing circuit design is implemented through digital nuclear-pulse signal processing technique in the new litho-density logging tool. Indoor data acquisition test and outdoor experiment are carried out for the new tool, results of which show that the new tool with the new method has higher precision （0. 015 g/cm3） and better stability than the conventional litho-density logging tools. Logging curves provided by the new tool are better agreement with that by foreign instruments.