地质与勘探2025，Vol.61Issue(3)：517-524,8.DOI:10.12134/j.dzykt.2025.03.008
数字检波器与模拟检波器地震勘探效果对比分析
Comparative Analysis of Seismic Exploration Performance:Digital Vs.Analog Detectors
王晨 1林娟 1娄兵 1马凯 1阿力甫江 1张雨凡1
作者信息
- 1. 中国石油新疆油田分公司勘探开发研究院地球物理研究所,新疆 乌鲁木齐 830000
- 折叠
摘要
Abstract
In order to accurately evaluate the performance advantages of digital detectors in seismic exploration,this study has established a strictly controlled contrast test environment in Penbei 1 well area,northwest margin of the Junggar Basin.For the first time,an equal condition comparison between analog(SG-5 type)and digital(WING-DFU node type)detectors was achieved by using identical acquisition parameters(channel spacing of 25 meters,1800 coverage,1.5～96 Hz controllable source scanning)and full frequency amplitude preservation processing flow.Experimental data shows that the energy attenuation of digital detectors in the high frequency range of 60～95 Hz is reduced by 23%compared to analog detectors.The effective bandwidth of a single shot acquisition is widened by 1 Hz at the low frequency end and increased by 1.5 Hz at the high frequency end compared to analog detectors.After"double high"full frequency processing,the effective bandwidth is further extended to 2～72 Hz(widened by 33%at the low frequency end and increased by 6%at the high frequency end compared to analog detectors at 3～68 Hz).The pre-stack time offset profile shows that the digital detector has improved the longitudinal resolution of 20～40 meter thin sand body in the Baijiantan Formation,and the accuracy of fault boundary identification is higher.This study provides a quantitative basis for the high-resolution exploration application of digital detectors in low signal-to-noise ratio areas by eliminating systematic errors caused by differences in acquisition processing parameters in traditional comparative experiments.关键词
数字检波器/模拟检波器/保幅处理/高分辨率/准噶尔盆地/新疆Key words
digital detector/analog detector/amplitude preserving processing/high resolution/Junggar Basin/Xinjiang分类
地质学引用本文复制引用
王晨,林娟,娄兵,马凯,阿力甫江,张雨凡..数字检波器与模拟检波器地震勘探效果对比分析[J].地质与勘探,2025,61(3):517-524,8.
