探讨高频检波器与低截处理的替代关系

Discussion on Substitution Relation between High-frequency Geophone and Low-cut Filter for Processing

刘景彦

LIU Jingyan

中国石化集团国际石油勘探开发有限公司, 北京 100029

SINOPEC International Petroleum Exploration and Production Corporation, Beijing 100029, China

地震检波器是实现把机械振动转换为电信号的传感器,不同检波器具有不同的相位特性和频率特性。从检波器的振动理论方程着手,分析了地震资料反射品质与检波器特性的关系。结合地质任务和技术指标要求,在相同采集因素条件下,执行特定的试验内容,考核了不同检波器类型及其性能,对资料进行了有益的处理方法尝试,获得实用而有意义的结论。在目的层较浅的探区,试验数据表明采用自然频率较低的检波器和特殊的低截处理方法同样能够实现高分辨率的地震勘探效果。

Seismic geophone is a sensor converting mechanical vibration into electrical signals. Different geophones usually have different phase and frequency responses. In this paper, beginning from theoretical equation of geophone vibration, the relationship between seismic reflection quality and geophone responses has been analyzed. Based on geological tasks and technical requirements, specific test has been carried out to assess different geophone characters and their functions under the same acquisition condition. In addition, several attempts on data processing were made to determine the suitable processing methods and parameters, and significant and useful conclusions have been drawn. It has been proved that for exploration targets at shallow depth, high-resolution may be fulfilled by acquisition with low natural frequency geophone plus special processing such as low cut filter.

中石化科技开发研究项目"泌阳凹陷三维地震勘探一体化技术研究与应用"(P01030)部分研究成果。

https://doi.org/10.3969/j.issn.1008-2336.2012.02.021