The oil/water separation in a liquid-liquid cylindrical cyclone is experimentally studied in this article.The effects of the flow split-ratio and the flow rate on the oil/water separation performance are determined.Fr...The oil/water separation in a liquid-liquid cylindrical cyclone is experimentally studied in this article.The effects of the flow split-ratio and the flow rate on the oil/water separation performance are determined.From the experimental results,it is shown that with the increase of the flow split-ratio,the oil/water separation efficiency is enhanced at first,and an optimal flow split-ratio exists,beyond that optimal split-ratio,the watercut in the underflow keeps constant,while the oil content in the overflow begins to decrease.The process of the oil core structure formation and the phase distribution in the cyclone are determined by numerical simulations.Furthermore,the dependence of the separation efficiency on the Reynolds number and the flow split-ratio is investigated based on a dimensional analysis.A comparison between the predicted values and the experimental data shows a good agreement.展开更多
基金supported by the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KJCX1-YW-21)
文摘The oil/water separation in a liquid-liquid cylindrical cyclone is experimentally studied in this article.The effects of the flow split-ratio and the flow rate on the oil/water separation performance are determined.From the experimental results,it is shown that with the increase of the flow split-ratio,the oil/water separation efficiency is enhanced at first,and an optimal flow split-ratio exists,beyond that optimal split-ratio,the watercut in the underflow keeps constant,while the oil content in the overflow begins to decrease.The process of the oil core structure formation and the phase distribution in the cyclone are determined by numerical simulations.Furthermore,the dependence of the separation efficiency on the Reynolds number and the flow split-ratio is investigated based on a dimensional analysis.A comparison between the predicted values and the experimental data shows a good agreement.
文摘为获得适合页岩气水平井的低油水比下性能优良的油基钻井液,利用Turbiscan Lab型分散稳定性分析仪研究了油水比对油包水乳状液的粒径及稳定性的影响,考察了油水比对油基钻井液性能的影响。研究结果表明,油水比由90∶10降至60∶40时,油包水乳状液的平均粒径由5.65μm增至8.21μm;随着油水比降低,乳状液的背散射光强度值变化幅度逐渐增大,油包水乳状液稳定性变差。在处理剂加量不变的条件下,油水比由90∶10降至60∶40,热滚后的油基钻井液的塑性黏度由16 m Pa·s增至55 m Pa·s,动切力由7 Pa增至30 Pa,破乳电压由1211 V降至303 V。通过提高乳化剂加量、降低有机土加量在低油水比条件下获得了性能优良的油基钻井液,并成功用于焦页54-3HF、焦页25-2HF、焦页54-1HF等多口井的现场施工。
