测井技术2017，Vol.41Issue(5)：534-537,4.DOI:10.16489/j.issn.1004-1338.2017.05.007
瞬变电磁测井信号自适应相干积累检测方法
Adaptive Coherent Integration Based Signal Detection Method for Transient Electromagnetic Logging
摘要
Abstract
The low signal-to-noise ratio (SNR) is one of the main factors which affected the development of borehole transient electromagnetic system due to the complicated measurement conditions such as high temperature,high pressure and motion measurement.Aiming at this problem,an adaptive coherent integration detection method for borehole transient electromagnetic systems is presented based on the cylindrically multi-layered inhomogeneous model.The method utilizes the correlation of transient electromagnetic response of the adjacent periods in motion measurement and achieves the adaptive length coherent integration by calculating the Frobenius norm of the difference of response in different periods.Field experiment results demonstrate that the proposed method can effectively improve the SNR of borehole transient electromagnetic system.Comparing to the fixed length coherent integration,the proposed method can adapt to the borehole environment much better.关键词
岩石物理方法/瞬变电磁/自适应/相干积累/信噪比Key words
petrophysical method/transient electromagnetic/adaptive/coherent integration/signal-to-noise ratio分类
天文与地球科学引用本文复制引用
党博,杨玲,刘长赞,杜娜..瞬变电磁测井信号自适应相干积累检测方法[J].测井技术,2017,41(5):534-537,4.基金项目
国家自然科学基金资助项目(51504194) （51504194）
陕西省教育厅重点学科研究计划项目(17JS106) （17JS106）
西安石油大学博士科研启动项目(2015BS27) （2015BS27）
