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基于直接测量的水合物储层颗粒间作用力测试系统与测试方法
于彦江1,2,3,罗强1,宁伏龙1,陆红锋2,3,刘志辉1,彭力1,王冬冬1,史浩贤2,3,刘志超1,段隆臣1
(1.中国地质大学(武汉)工程学院,湖北武汉 430074;2.中国地质调查局广州海洋地质调查局,广东广州 510075;3.中国地质调查局天然气水合物工程技术中心,广东广州 510075)
摘要:
针对水合物储层失稳和出砂行为力学机制的微观刻画难题,开发一种基于直接测量储层颗粒间作用力的微力测量装置,并提出相应的测试方法,通过对比前人水滴、冰颗粒和水合物颗粒间的黏附力测试结果,验证装置的准确性,进而开展冰颗粒、四氢呋喃(tetrahydrofuran, THF)水合物颗粒与南海砂之间的摩擦力测试。结果表明,冰和THF水合物颗粒与南海砂之间呈现非常相似的摩擦响应行为;在较小荷载条件下,THF水合物颗粒与南海砂之间摩擦系数小于冰颗粒与南海砂之间摩擦系数;随着荷载的增加,THF水合物颗粒与南海砂之间的滑动摩擦系数与冰颗粒的十分接近,约为0.6。
关键词:  水合物  储层出砂  测试装置  黏附力  摩擦力
DOI:10.3969/j.issn.1673-5005.2021.01.010
分类号::TE 358.1
文献标识码:A
基金项目:
Direct measurement of the interaction forces between sediment particles in gas hydrate reservoirs
YU Yanjiang1,2,3, LUO Qiang1, NING Fulong1, LU Hongfeng2,3, LIU Zhihui1, PENG Li1, WANG Dongdong1, SHI Haoxian2,3, LIU Zhichao1, DUAN Longchen1
(1.Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China;2.Guangzhou Marine Geological Survey of China Geological Survey, Guangzhou 510075, China;3.Natural Gas Hydrate Engineering Technology Center of China Geological Survey, Guangzhou 510075, China)
Abstract:
In this study, an apparatus to directly measure the interaction forces between sediment particles in gas hydrate reservoirs was developed, and the corresponding measurement methods and procedures were described. The effectiveness of the apparatus and methods were validated by comparing the measured adhesion forces in gas hydrate with that measured in water droplet, ice and tetrahydrofuran (THF) hydrate particles as reported in literature. Then, the frictional forces between ice or THF hydrate and sand particles from the sediments in the South China Sea were firstly measured using the apparatus. The results show that the friction behavior between the ice and sand particles is similar to that between the THF and sand particles, while the later is lower than that of the former under the condition of low loading. With the increase of loading, the measured frictions between THF hydrate and sand particles are close to that between the ice and sand particles, and the measured sliding friction coefficient is approximately of 0.6.
Key words:  clathrate hydrate  sand production  measurement apparatus  adhesion force  friction
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