拖缆式浅地层剖面采集系统改进方法

传统拖缆式浅地层剖面地震资料采集系统中往往采用检波点组合的方式进行资料采集，当海水深度较深时，可以忽略组内距对地震资料的影响，当海水深度较浅时，这种采集方式容易导致波形畸变和高频信息丢失。利用多道地震的思想，对传统拖缆式浅地层剖面采集系统进行改进。新的浅地层剖面采集系统采用拖缆式施工、多道、无组合单点接收方式进行采集，即可以获得各检波点采集到的数据，同时改进数据记录的方式。新的采集系统中可以同时监控原始单炮记录、直接叠加后单道记录、时差校正后叠加单道记录、时差校正后地震剖面。

IMPROVEMENT OF TOWING TYPE SUB-BOTTOM SEISMIC PROFILE ACQUISITION SYSTEM

Traditionally, the geophone point combination is commonly used in the towing type sub-bottom seismic profile acquisition system. If the water depth is sufficient, the impact of the group internal distance is ignorable in the traditional towing type acquisition system. However, it is easy to cause wave distortion and loss of high frequency information when the sea water is shallow. Therefore, we take the advantage of the multi-channel seismic recording to make some improvement on the towed-streamer sub-bottom profile acquisition system. The new system is using a way of towing construction, multiple seismic traces and non-combination of geophone to collect data. The data from every geophone point will be acquired. In the meantime, the new acquisition system can simultaneously monitor the original single shot record, and stack channel before and after the time difference correction.