LT区低信噪比地震资料现场处理方法  

IN-SITU PROCESSING OF LOW SIGNAL/NOISE RATIO SEISMIC DATA FROM THE LOTUS BLOCK

作　　者：杨文军[1] 张福祥[2] 段云卿[1] 刘小明[2] 王雪芳[3] 

机构地区：[1]中国地质大学,北京100083 [2]江苏石油勘探局物探处,江苏扬州225000 [3]中国矿业大学,北京100083

出　　处：《物探与化探》2008年第3期331-334,共4页Geophysical and Geochemical Exploration

摘　　要：针对LOTUS区块的地震资料,研究了复杂地表区低信噪比地震资料现场处理的方法。在大量的试验和分析的基础上,采用高程静校正与折射静校正相结合的方法,有效解决了因地表起伏大、低降带速度和厚度剧烈变化引起的野外静校正问题。对于面波、低频干扰,规则线性干扰等造成的地震资料信噪比降低进行了针对性的压制和消弱。采用地表一致性反褶积技术基本解决了因激发和接收条件引起的不同炮集记录上的地震波属性的变化。总结了一套适合该区地震资料现场处理的方法和流程。In this paper, the problems of static correction and low signal/noise ratio in the complex surface seismic data were analyzed and studied on the basis of large quantities of experiments and analyses. The method in which the datum static correction is combined with the refraction static correction was adopted for effectively solving the problem of field static correction caused by the complex surface and low velocity layer. Such factors as surface wave, low-frequency disturbance and regular linear disturbance resulting in low signal/noise ratio of the seismic data were successfully suppressed. The difference in the wavelet of shots was solved effectively with the surface consistency deconvolution technique.

关 键 词：加蓬共和国 地震资料处理 低信噪比 高程静校正 折射静校正 

分 类 号：P631.4[天文地球—地质矿产勘探]