摘要
声幅-变密度测井是一种常规的工程测井项目,因其测量简单,费用低,在套管井固井质量监测评价方面得到了广泛的应用。介绍了HH-2530测井系统声幅-变密度测井原理。针对常见的测井资料质量问题,通过对井下仪器接收电路板上传的声波信号进行了监测和分析,找到造成资料质量问题的原因,研究出一种方法。通过对HH-2530声幅-变密度仪器接收线路的增益进行调整,降低了井下仪器上传声波信号的幅度。将方波信号调整成正弦波信号,使上传的声波信号工作在线性范围内,便于地面计算机系统能有效识别和锁定套管波首波。实践表明,这种方法起到了改善HH-2530声幅-变密度测井资料质量的作用。
The acoustic amplitude and variable density logging is a conventional engineering log project, because of its simple measurement and low cost, which has been widely used in the monitoring and evaluation of cased - well cement bonding quality. The CBL - VDL logging principle of the HH - 2530 logging system is introduced. In view of the common quality problems of logging data, the reason of these prob-lems is found by monitoring and analyzing the acoustic signals uploaded by the receiving circuit board of downhole instruments. Meanwhile, a method is developed. By adjusting the gain of the receiving line of the HH - 2530 acoustic amplitude and variable density instrument, the amplitude of the acoustic wave transmitted by the downhole instrument is reduced. The square wave signal is modulated into sine wave signal and the up - transmitted acoustic signal works in the linear range, so that the ground computer system can effectively identify and lock the first wave of casing waves. Practice has shown that this method can improve the quality of the HH - 2530 acoustic amplitude and variable density logging data.
出处
《石油管材与仪器》
2018年第1期97-100,共4页
Petroleum Tubular Goods & Instruments
关键词
声幅-变密度测井
资料质量
井下增益
套管首波
acoustic amplitude and variable density logging
data quality
downhole gain
casing first wave
