水射流技术在海洋水合物钻采过程中的应用研究进展

A review of research on the application of water jet technology in marine hydrate drilling and mining processes

摘要:

天然气水合物是一种储量巨大、清洁高效的新型能源，我国海洋天然气水合物资源非常丰富，安全高效开采水合物能够助力实现我国能源结构转型与“双碳”战略目标。水合物储藏具有非成岩、弱胶结与温压敏感性强的特点，水射流技术应用于水合物钻采过程可有效解决常规方法引起的井壁坍塌与地层失稳等工程问题。本文总结了现有的水射流钻采水合物工艺与水射流钻具，分析了水射流冲击作用下含水合物沉积物破碎过程影响因素与破碎机理，最后对水射流技术在水合物钻采过程中的应用研究方向进行了展望，以期为我国海洋天然气水合物钻采技术研究提供参考。

Abstract:

Natural gas hydrates is a new type of energy， characterized by huge reserves， cleanliness and high efficiency. China is rich in hydrate resources， and the safe and efficient exploitation of hydrates can help realize the transformation of energy structure and the strategic goal of “double carbon”. Hydrate reservoirs are generally characterized by non-rock formation， weak cementation and strong temperature and pressure sensitivity. The application of water jet technology to hydrate drilling process can effectively solve the engineering problems of well borehole collapse and formation destabilization caused by conventional methods. This paper summarizes the existing water jet drilling hydrate technology and water jet drilling tools， and analyzes the influencing factors and breaking mechanism of hydrate-containing sediment breaking process under the impact of water jet. Finally， the research direction for the application of water jet technology in the hydrate drilling process is prospected. This work can provide support for the research of natural gas hydrate development technology in China.