海域天然气水合物保温保压取样钻具研究与应用进展

Progress in research and application of the pressure‑temperature core sampler for marine natural gas hydrate

保温保压取样,作为开展海域天然气水合物勘查工作的关键技术方法,是采获水合物原位样品的核心技术手段。本文对国内外海域天然气水合物保温保压取样钻具的相关资料进行了汇总梳理,并从工作原理、结构特点和试验应用等方面对国内保温保压取样钻具的研究与应用进展进行了分析与总结。通过采用不同的工作原理,国内保温保压取样钻具已能够在软-中硬-硬地层中进行取样,在工程应用中的保压成功率、岩心收获率等性能指标能够满足取样需求,有效推进了天然气水合物勘查评价自主化实施进程。

As a key technical method for the exploration of marine natural gas hydrates,pressure‑temperature sampling is a core technical method for obtaining in‑situ samples of hydrates.This article reviews the relevant data of pressure‑temperature core samplers at home and abroad,and analyzes domestic marine natural gas hydrate pressure‑temperature core samplers in terms of the working principle,structural characteristics,and experimental applications.The domestic pressure‑temperature core sampler has been able to sample in soft to medium‑hard to hard formations by adopting different working principles.The performance indicators of domestic pressure‑temperature core samplers in field applications,such as pressure retention success rate,core recovery,can also meet the sampling needs;thus effectively facilitating the process of independent natural gas hydrate exploration and evaluation by China.