中国石油大学学报（自然科学版）2017，Vol.41Issue(1)：78-84,7.DOI:10.3969/j.issn.1673-5005.2017.01.009
基于非均匀采样的模拟退火随钻电磁波电阻率测井检波系统研究
SA demodulation system based on nonuniform sampling for LWD electromagnetic resistivity logging tool
摘要
Abstract
Conventional demodulation systems of LWD electromagnetic resistivity logging use widely uniform sampling,and the measurements are usually processed using digital correlation or the digital phase sensitivity detector (DPSD) method.Consequently,the detection results are affected by the quantization error and the spectrum leakage in the sampling process.In this paper,an simulated annealing(SA) demodulation method based on nonuniform sampling is presented and a rapid detection circuit is designed.The detection results of the proposed method are compared with that of the DPSD methods with uniform sampling,and demonstrate that the former method has a strong frequency-selecting capacity,and the correlation with the quantization errors and the measurement errors brought by the spectrum leakage can both be suppressed effectively.This method is more suitable for demodulation systems of the LWD measurements in extreme environment.关键词
非均匀采样/模拟退火/量化误差/频谱泄漏/随钻电磁波电阻率测井仪器/测井检波Key words
nonuniform sampling/simulated annealing(SA)/quantization errors/spectrum leakage/LWD electromagnetic resistivity logging tool/well logging demodulation分类
天文与地球科学引用本文复制引用
姜明,柯式镇,吕世瑶,李成远,张文豪..基于非均匀采样的模拟退火随钻电磁波电阻率测井检波系统研究[J].中国石油大学学报（自然科学版）,2017,41(1):78-84,7.基金项目
国家油气重大专项(2011ZX05020-002) （2011ZX05020-002）
