三维拖缆地震采集大缆距配置与实践

Three-dimensional streamer seismic acquisition largecable spacing configuration and practice

海上三维拖缆地震采集的一个显著特点是高效,而有效提高电缆间距并相应增加震源数量是在不降低数据质量的基础上进一步提高效率的关键,也是拖缆施工模式发展到今天所遇到的瓶颈之一。本文结合具体采集项目的实施过程,介绍了三维拖缆地震采集中拖带系统的作用机制及装备构成,指出了制约电缆间距进一步提升的相关因素,总结了项目实施过程中采取的对应措施及取得的结果,为今后的大缆距施工积累了经验。

One of the distinctive features of offshore 3 D streamer seismic acquisition is high efficiency,and effectively improving the cable spacing and correspondingly increasing the number of seismic sources is the key to further improve the efficiency without degrading the data quality,which is also one of the bottlenecks encountered in the development of the streamer interval construction mode to date.This paper introduces the mechanism and equipment composition of the streamer system in3 D streamer interval seismic acquisition,points out the factors that restrict the further improvement of receive line distanceand summarizes the corresponding measures taken and results achieved during the project implementation,which accumulates experience for future receive line distance construction.