摘要
到目前为止 ,任何深海天然气水合物原位岩心样品的钻探、取心技术都离不开ODP(大洋钻探计划 )或DSDP(深海钻探计划 )专用船舶钻探技术 ,该技术主要通过从工作母船上连接几百到几千米钻杆到海底 ,实现 50 0～ 1 0 0 0m的钻探 ,再通过不同类型PCS(保压取心器 )与PTCS(保压保温取心器 )取心工具实现样品采集。重要特点是投入经费巨大。新型保压保温取心钻具是将钻具直接固定在深海海底 ,实现样品的原位保真采集 ,针对国内外两类着底式天然气水合物钻探、取心技术进行了分析 ,对于深海浅表层天然气水合物原位样品采集作业反映了创新的思维、技术模式。
At present,any in-situ drilling and coring work of gas hydrate in deep seas depends upon the ODP (Ocean Drilling Program) and DSDP (Deep Sea Drilling Project)special drilling technique by making use of ships,that is to say,a parent ship puts down a rod hundreds or thousands of meters long to the seabed to carry out drilling of 500～1 000 m in length,and then different PCSs(pressure coring samplers) and PTCSs(pressure-temperature coring samplers)are used to collect samples.Such technique needs huge funds.Our new method is to fix the pressure-temperature corers directly on the seabed and realize the in-situ hi-fi sample collection.
出处
《海洋地质动态》
2003年第6期24-27,共4页
Marine Geology Letters
基金
86 3项目 (2 0 0 1AA6 110 2 0 )资助
