疏水性低共熔溶剂萃取油基岩屑的工艺优化

Process Optimization of Oil-based Drill Cuttings Extraction by Hydrophobic Deep Eutectic Solvent

张鼎 唐培林 张琳婧 张益臣 宋英发 方申文

ZHANG Ding TANG Peilin ZHANG Linjing ZHANG Yichen SONG Yingfa FANG Shenwen

为开发安全、高效的萃取剂，满足油田安全生产要求，探索了利用疏水性低共熔溶剂（DES）萃取处理油基 岩屑的可行性。首先，利用搅拌萃取优选了构成DES的氢键供体和氢键受体及两者的组成比例；然后，以萃取后 的岩屑含油量为指标，分别对搅拌萃取、超声波萃取和微波萃取进行了工艺优化。结果表明，萃取性能最佳的 DES为物质的量之比为0.8∶1 的月桂酸和麝香草酚组合。3 种萃取工艺中超声波萃取处理油基岩屑的工艺条件 相对温和，萃取后岩屑含油量可降至1%以下。推荐超声波萃取条件为DES与油基岩屑质量比6∶1、超声时间30 min、萃取温度40 ℃，此时岩屑含油量可降至0.88%。

In order to develop safe and efficient extractant and meet the requirement of safety production in oilfield，the feasibility of extracting oil-based drill cuttings by using hydrophobic deep eutectic solvent（DES）was investigated. Firstly，the hydrogen bond donor and hydrogen bond acceptor of DES were studied by stirring extraction. Then，taking the oil content of extracted drilling cuttings as the indicator，the processes of stirring extraction，ultrasonic extraction and microwave extraction were optimized. The experiment results showed that the best DES was the combination of lauric acid and thymol with the molar ratio of 0.8∶1. Among the three extraction processes，the ultrasonic extraction process was relatively mild. The oil content of the extracted cuttings could be reduced to less than 1%. The specific process was recommended as follows：6∶1 the mass ratio of DES and oil-based drill cuttings，30 min ultrasonic extraction time，and 40 ℃ extraction temperature. Under this condition，the oil content of cuttings could be reduced to 0.88%.

10.19346/j.cnki.1000-4092.2022.04.024