An investigation on gas hydrate formation and slurry viscosity in the presence of wax crystals
An investigation on gas hydrate formation and slurry viscosity in the presence of wax crystals
复制标题
蜡晶体存在下天然气水合物形成和浆液粘度的研究
DOI：
10.1002/aic.16192
复制
发表时间：
2018-09-01
期刊：
影响因子：
3.7
通讯作者：
Gong, Jing
中科院分区：
文献类型：
--
作者：
Shi, Bo-Hui;Chai, Shuai;Gong, Jing
弄清水合物与蜡之间的相互作用对保证深水油田的安全生产具有重要意义。在高压水合物浆体流变学测量系统上进行了实验，研究了石蜡晶体存在时水合物的形成和浆体的粘度。结果表明，蜡晶的存在可以延长水合物成核诱导时间，其对水合物生长的影响受多种因素的影响。较高的搅拌速度可以明显促进水合物的生长速度，但其对水合物成核诱导时间的影响较复杂。较高的初始压力将促进水合物的形成。天然气水合物水泥浆表现为剪切稀化行为，随着含蜡量和初始压力的增加，水合物水泥浆粘度增大。通过考虑水合物颗粒、蜡晶和水滴的聚集和破碎，建立了适合含蜡晶水合物浆料的半经验粘度模型。(C)2018年美国化学工程师学会：3502-3518
Clarifying the interaction effect between hydrate and wax is of great significance to guarantee operation safety in deep water petroleum fields. Experiments in a high-pressure hydrate slurry rheological measurement system were carried out to investigate hydrate formation and slurry viscosity in the presence of wax crystals. Results indicate that the presence of wax crystals can prolong hydrate nucleation induction time, and its influence on hydrate growth depends on multiple factors. Higher stirring rate can obviously promote hydrate growth rate, while its influence on hydrate nucleation induction time is complicated. Higher initial pressure will promote hydrate formation. Gas hydrate slurry shows a shear-thinning behavior, and slurry viscosity increases with the increase of wax content and initial pressure. A semiempirical viscosity model showing a well-fitting is established for hydrate slurry with wax crystals by considering the aggregation and breakage of hydrate particles, wax crystals, and water droplets. (c) 2018 American Institute of Chemical Engineers AIChE J, 64: 3502-3518, 2018