数字光栅地震检波器的若干问题研究
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摘要
地震检波器的发展水平已成为衡量油气勘探能力的一个重要标志,以高分辨率和高动态范围著称的光栅地震检波器展示出了强劲的发展前景。针对目前光栅地震波探测研究中发现的影响分辨率和动态范围提高的难点,对数字光栅地震波探测中的若干问题进行了研究,提出了数字光栅信号的无失真采样和根据地震波采样数据对数字光栅误差进行同步分离的解决方法。仿真和实验数据均验证了上述方法的有效性,由数字光栅误差引入的地震波探测的谐波失真已经可以忽略不计。
Seismic wave sensor is always one of the most important elements in oil and gas exploration.The newly developed digital grating sensor with high resolution and large dynamic range shows its great prospects in the near future.In view of problems that influence seismic wave detection resolution and dynamic range,we discuss in this paper some questions of seismic wave detection by digital grating sensor,and propose a new approach for nondistortion sampling of digital grating signals and synchronous separation of digital grating errors from seismic wave sampled data.Both simulation and experimental tests verify the validity of the proposed approach.The detected harmonic distortion of seismic wave caused by digital grating errors can be neglected.
引文
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