石油与天然气地质 ›› 2022, Vol. 43 ›› Issue (3): 703-710.doi: 10.11743/ogg20220318

• 方法技术 • 上一篇    下一篇

水合物颗粒与矿物表面间粘附力特性及其影响因素

滕莹1,2,3,4(), 王朋飞5,6,7(), Aman Zachary8   

  1. 1.深圳大学 深圳市深部工程科学与绿色能源重点实验室，广东 深圳 518060
    2.深圳大学 深地科学与绿色能源研究院，广东 深圳 518060
    3.深圳大学 土木与交通工程学院，广东 深圳 518060
    4.深圳大学 广东省深地科学与地热能开发利用 重点实验室，广东 深圳 518060
    5.南方科技大学 深圳市天然气水合物重点实验室，广东 深圳 518055
    6.南方科技大学 前沿与交叉科学研究院，广东 深圳 518055
    7.南方海洋科学与工程广东省实验室（广州），广东 广州 511458
    8.西澳大学 机械与化学工程学院，澳大利亚 珀斯 60090
  • 收稿日期:2021-04-05 修回日期:2022-03-20 出版日期:2022-06-01 发布日期:2022-05-06
  • 通讯作者: 王朋飞 E-mail:tengying@szu.edu.cn;wangpf6@sustech.edu.cn
  • 第一作者简介:滕莹（1991—），女，副研究员，非常规油气开采。E?mail： tengying@szu.edu.cn。
  • 基金项目:
    深圳市天然气水合物重点实验室项目(ZDSYS20200421111201738);南方海洋科学与工程广东省实验室（广州）项目(K19313901);国家自然科学基金青年基金项目(52106092);广东省珠江人才计划引进创新创业团队计划项目(2019ZT08G315)

Characteristics and influencing factors of adhesive force between hydrate particles and mineral surface

Ying Teng1,2,3,4(), Pengfei Wang5,6,7(), Zachary Aman8   

  1. 1.Shenzhen Key Laboratory of Deep Engineering Sciences and Green Energy，Shenzhen University，Shenzhen，Guangdong 518060，China
    2.Institute of Deep Earth Sciences and Green Energy，Shenzhen University，Shenzhen，Guangdong 518060，China
    3.College of Civil and Transportation Engineering，Shenzhen University，Shenzhen，Guangdong 518060，China
    4.Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization，Shenzhen University，Shenzhen，Guangdong 518060，China
    5.Shenzhen Key Laboratory of Natural Gas Hydrates，Southern University of Science and Technology，Shenzhen，Guangdong 518055，China
    6.Academy for Advanced Interdisciplinary Studies，Southern University of Science and Technology，Shenzhen，Guangdong 518055，China
    7.Southern Marine Science and Engineering Guangdong Laboratory （Guangzhou），Guangzhou，Guangdong 511458，China
    8.School of Engineering，Chemical Engineering，University of Western Australia，Perth，WA 6009，Australia
  • Received:2021-04-05 Revised:2022-03-20 Online:2022-06-01 Published:2022-05-06
  • Contact: Pengfei Wang E-mail:tengying@szu.edu.cn;wangpf6@sustech.edu.cn

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摘要：

在水合物开采过程中，管道内的液滴和气泡受环境条件影响会转化生成水合物颗粒，水合物颗粒发生聚集时会引起堵塞，导致潜在的安全问题。粘附力是探究开采管道流动安全及水合物颗粒聚集和沉积机理的关键，目前相关研究主要集中在输运过程中水合物颗粒间或颗粒-表面间粘附力的测量和描述，而对开采过程中沉积物矿物润湿性及表面粗糙度对粘附力的影响关注较少。利用粘附力测量实验系统，开展了水合物颗粒与经不同方法处理的碳钢表面及石英石、孔雀石、方解石和高岭石等矿物表面间粘附力的测量分析。结果显示，受润湿性影响，水合物颗粒与矿物表面之间粘附力是其与碳钢表面粘附力的3 ~ 6倍。此外，水合物颗粒与矿物表面粘附力受接触时间影响，与方解石和高岭石表面间的粘附力随接触时间的延长而增加。进一步探索添加离子表面活性剂对水合物晶体生长速度及粘附力的影响，并指出颗粒与矿物表面水膜接触面积变化使水合物颗粒形貌由层状结构变为针状结构。对比实验测量结果与理论计算结果的差异，分析得出矿物表面的强亲水性是造成结果差异的关键原因。

关键词: 离子表面活性剂, 润湿性, 接触时间, 生长形貌, 粘附力, 沉积物矿物, 水合物开采

Abstract:

In the process of hydrate mining， the droplets and bubbles in pipeline can be turned into hydrate particles under the environmental conditions. The occurrence of hydrate particle aggregation can cause blockage， leading to potential safety problems. Adhesive force is the key to exploring the flow safety of mining pipeline and the accumulation/deposition mechanism of hydrate particles. At present， the relevant researches focus on the measurement and characterization of the adhesive force between hydrate particles or between particles and surface in transport process. However， documents on the effects of mineral wettability and surface roughness on the adhesion of hydrate deposits are rarely seen. In this study， the adhesive force between hydrate particle and carbon steel surface treated by different methods as well as mineral surface， such as quartz， malachite， calcite and kaolinite were measured and analyzed using the adhesive force measurement experimental system. The results show that the adhesive force of hydrate particles to mineral surface is 3-6 times that of hydrate particles to carbon steel surface， due to the wettability difference. In addition， the adhesive force between hydrate particles and mineral surfaces is also affected by contact time， as shown by the strengthened adhesive force of hydrate particles with calcite and kaolinite surfaces under prolonged contact. The effects of ionic surfactants on hydrate growth rate and adhesion were also investigated， and it was pointed out that the change of contact area between particles and water film on mineral surface serves to change the morphology of hydrate particles from layered structure to needle-like structure. Finally， in comparison of the experimental results with theoretical calculation， we concluded that the strong hydrophilicity of the mineral surface is key to the differences.

Key words: ionic surfactant, wettability, contact time, growth morphology, hydrate, adhesive force, sedimentary mineral, hydrate mining

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