低碳化学与化工2024，Vol.49Issue(4)：113-123,11.DOI:10.12434/j.issn.2097-2547.20230313
含蜡及表面活性剂环戊烷水合物浆液生成及黏度特性
Formation and viscosity characteristics of cyclopentane hydrate slurry with wax and surfactant
摘要
Abstract
As oil and gas exploration continues to expand into deepwater areas,the low temperature and high pressure transmission environment during multiphase mixed flow in deepwater pipelines is highly prone to causing problems such as hydrate and wax deposition and pipeline blockage.Especially when wax and hydrate coexist,the gathering and transmission pipelines will face higher risks of pipeline blockage.To this end,the rheological properties of cyclopentane hydrate formation and hydrate slurry rheology in oil-water systems containing wax and surfactant(Span 80)were investigated using a rheometer.The effects of factors such as wax content(mass fraction,the same below)and surfactant concentration(mass fraction,the same below)on the critical time and shear dilution of wax-hydrate coexistence systems were clarified.The results show that when Span 80 concentration is 1.0%,the wax content increases from 0.00%to 1.00%and the critical time of hydrate formation increases from 25.8 min to 49.8 min,an increase of about 93%.When the concentration of Span 80 is 1.5%,2.0%and 3.0%,the critical time of hydrate formation also increases with the increase of wax content by 113%,93%and 241%,respectively.For the low-to-medium wax content systems(≤0.75%),the critical time of hydrate formation shortens with the increase of Span 80 concentration.For the high wax content systems(≥1.00%),the critical time of hydrate formation fluctuates with the increase of Span 80 concentration.In addition,with the hydrate formation,the viscosity of both wax-containing and wax-free systems first increases sharply,then gradually decreases and tends to be stable.Both the peak viscosity and final equilibrium viscosity of wax-containing hydrate slurry are significantly higher than those of the wax-free system.By comparing the consistency coefficient and flow characteristic index,it is found that the value of characteristic index for wax-containing hydrate slurry increases with the increase of wax content and Span 80 concentration.The wax-containing oil-water emulsion,hydrate slurry and wax-containing hydrate slurry systems all exhibit shear-thinning behavior,and the wax-containing hydrate slurry exhibits a stronger shear-thinning behavior.关键词
蜡晶/表面活性剂/水合物浆液/临界时间/剪切稀释性Key words
wax crystal/surfactant/hydrate slurry/critical time/shear-thinning behavior分类
能源科技引用本文复制引用
柳扬,陈杰,李娜,孟嘉伟,吕晓方,周诗岽,马千里,王传硕..含蜡及表面活性剂环戊烷水合物浆液生成及黏度特性[J].低碳化学与化工,2024,49(4):113-123,11.基金项目
国家自然科学基金(52004039,52274061,51974037) （52004039,52274061,51974037）
中国博士后科学基金面上项目(2021M693908) （2021M693908）
江苏省教育厅面上研究项目(18KJB440001) （18KJB440001）
中石油创新基金(2022DQ02-0501). （2022DQ02-0501）
