摘要
为研究高压水射流切割、破碎南海天然气水合物储层的过程,采用著名的LS-DYNA显示动力分析有限元程序,对淹没状态下,水射流破碎海底含水合物沉积物过程进行数值模拟研究,研究了不同射流速度对高压水射流作用下含水合物沉积物破碎效果的影响规律。随着射流速度的增大,冲蚀深度逐渐增大,两者呈线性递增关系。含水合物沉积物冲蚀体积是轴向冲蚀与径向冲蚀共同作用的结果,射流速度越大,对含水合物沉积物的轴向与径向冲蚀作用增强,加大了含水合物沉积物冲蚀体积递增速率。
In order to explore the process and mechanism of high pressure water jet cutting and breaking natural gas hydrate reservoir of the South China Sea, LS—DYNA3D code had been used to simulate the process of water jet breakup of hydrates in submerged state. The effect of different jet velocities on the crushing effect of hydrate bearing sediments under high pressure water jet was studied. The erosion depth increases linearly with the jet velocity. The erosion volume of hydrates sediment is the result of axial erosion and radial erosion. The greater the jet velocity is, the axial and radial erosion of hydrate deposits are enhanced, and the increasing rate of the erosion volume of the hydrate deposits is increased.
作者
潘栋彬
陈晨
杨林
靳成才
李曦桐
刘书源
陈勇
朱江
PAN Dong-bin1,2 , CHEN Chen 1,2,3, YANG Lin1,2, JIN Cheng-cai1,2, LI Xi-tong1,2 , LIU Shu-yuan1,2, CHEN Yong1,2, ZHU Jiang1,2(1.College of Construction Engineering, College of Jilin University, Changchun Jilin 130026, China; 2.Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Ministry of Natural Resources, Changchun Jilin 130026, China~ 3.State Key Laboratory of Superhard Materials, Changchun Jilin 130012, China)
出处
《探矿工程（岩土钻掘工程）》
2018年第10期27-31,共5页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
国家自然科学基金面上项目"高压低温水射流作用下海底天然气水合物储层破岩过程与机理研究"(编号:41672361)
吉林省科技发展计划项目
国际科技合作项目"海洋天然气水合物置换开采关键技术研究"(编号:20170414044GH)
省校共建项目
新能源专项"油页岩原位转化工程共性关键技术研究"(编号:SXGJSF2017-5)
关键词
天然气水合物
高压水射流
数值模拟
冲蚀深度
冲蚀体积
natural gas hydrate
high-pressure water jet
numerical simulation
depth of erosion
volume of erosion
