节点采集技术在复杂水域地震资料采集中的应用

在海上地震勘探数据采集中,会遇到复杂的过渡带水域,其水深变化剧烈,既有水深达二三百米的深水区,也有极浅的、密布的暗礁、小岛和浅滩等浅水区和陆地区。在浅水区,无法采用拖缆船采集施工,在深水区海底电缆又无法达到如此作业深度。在这样的区域内,常规的海上地震数据采集将会出现地震资料缺失带。节点采集技术的作业范围从浅水到700 m水深,能够弥补深水拖缆和海底电缆两种采集方式的短板,可适应于复杂过渡带水域的地震采集,避免地震资料空白区,有利于区域整体勘探、开发。

OCEAN BOTTOM NODES TECHNIQUE AND ITS APPLICATION

Marine seismic acquisition often meets with some transitional zones,which are very complicated and have rapidly changeable water depth that could sometimes reach 300 m in depth;meanwhile,lots of islands and reefs are spread there.It is too risky for the ma-rine steamship to conduct work,and OBC fails to reach the work depth.Therefore,there are some seismic data gaps in these zones.The Z700 ocean bottom node could acquire seismic data from the shallow water up to 700 m in depth and is capable of filling up the data gaps and linking up data obtained form the whole region,thus favorable for the integration of the oilfield exploration.