摘要
针对深水天然气水合物取样原位温度、压力维持困难的问题,依据牟合方盖几何原理,选用耐高压、耐低温、耐海水腐蚀且寿命长、抗疲劳的材料,研制出海洋深水原位自触发保压控制器,实现深水天然气水合物取样过程中样品压力稳定。基于传热学基本原理,研发了多种主动和被动保温技术,利用自主研发的控温系统,耦合半导体制冷、相变潜热储能和空心微珠复合材料3种保温方案,形成了一种新型复合保温技术,满足了深水天然气水合物取样过程中的样品保温需求。基于保温保压取样关键工具和技术研究成果,研制了贯入式深水天然气水合物原位保温保压取样器,并利用载人深潜器完成2次海试作业,均成功获取了保持原位温度、压力的深水沉积物(天然气水合物)样品。研究结果为深水天然气水合物的安全、高效开发提供了关键技术支撑,也将有力推动深水原位保压保温领域的科研工作与工程实践。
In view of the difficulty in maintaining in-situ temperature and pressure during sampling of deepwater natural gas hydrates,based on the geometric principle of the Steinmetz solid,materials resistant to high pressure,low temperature,seawater corrosion,and fatigue and with a long service life were selected.An in-situ self-triggering pressure preservation controller for marine deep water was developed to achieve stable sample pressure during the sampling process of deepwater hydrates.Based on the fundamental principles of heat transfer,a variety of active and passive thermal insulation technologies were developed.By using a self-developed temperature control system and coupling three thermal insulation schemes,namely semiconductor refrigeration,phase change-based latent heat energy storage,and hollow microsphere composite materials,a new type of composite thermal insulation technology was formed,which met the thermal insulation requirements of samples during the sampling process of deepwater hydrates.Based on the research results of key tools and technologies for thermal insulation and pressure preservation sampling,a penetrating in-situ thermal insulation and pressure preservation sampler for deepwater natural gas hydrates was developed.Two sea trial operations were completed using manned deep-sea submersibles,and samples of deepwater sediments(natural gas hydrates)maintaining in-situ temperature and pressure were successfully obtained in both cases.The research result provides key technical support for the safe and efficient development of deepwater natural gas hydrates.It will also strongly promote scientific research and engineering practice in the field of in-situ thermal insulation and pressure preservation in deep water.
作者
付成行
赵乐
陈领
徐萌
吴晗
秦铂涛
谢和平
FU Chenghang;ZHAO Le;CHEN Ling;XU Meng;WU Han;QIN Botao;XIE Heping(State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,Sichuan University,Chengdu,Sichuan,610065,China;State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,Shenzhen University,Shenzhen,Guangdong,518060,China)
出处
《石油钻探技术》
北大核心
2025年第3期146-155,共10页
Petroleum Drilling Techniques
基金
国家自然科学基金青年学生基础研究项目(博士研究生)“深海天然气水合物原位相变保温取心机理及效能研究”(编号:523B2101)
深圳市技术攻关重点项目“基于深水钻井平台的天然气水合物取样、转移与测试系统研发”(编号:JSGG20220831105002005)联合资助。
关键词
天然气水合物
原位保压
原位保温
深水取样
取样器
现场试验
natural gas hydrate
in-situ pressure preservation
in-situ thermal insulation
deepwater sampling
sampler
field test
