【摘要】 根据地震波传播的时距关系,利用海底地震仪子母钟对时记录、测深数据和近炮点数据,使用数据处理软件OBSTOOL,对南海北部采集的海底地震记录进行高精度时钟校正处理。通过反演确定放炮延迟和海底地震仪的漂移参数,为准确反演速度奠定了基础。分析结果显示,南海北部OBS数据放炮延迟为1.278s,最大时钟校正量为2.394 s,OBS偏离测线最大距离为652m,这些将会导致浅层正、反演结果不准确,影响BSR的正确识别。更多还原

【Abstract】 Based on the time-distance equation and by the OBSTOOL software,high-precision clock correction for ocean bottom seismograph(OBS)data from the northern South China Sea is processed using clock file,depth recorder and nearoffset OBS data.Exact shot delay and drift values are determined by the inversion,establishing the base of accurate velocity inversion.The analysis result showed that the shot delay is 1.278s,the largest clock correction is 2.394s,and the largest deviation from the profile is about 652m,which may cause the inaccuracy of forwarding and inversion for the velocity structure in shallow layers and affect the identification of bottom simulating reflection(BSR).更多还原