钻井液与完井液2017，Vol.34Issue(6)：1-7,7.DOI:10.3969/j.issn.1001-5620.2017.06.001
超低界面张力纳米乳液处理含油作业废物的研究
Study on Treatment of Oil-bearing Wastes
摘要
Abstract
High temperature thermal decomposition and chemical extraction are commonly used in the innocent treatment of oilbearing wastes in operation areas.These treatments require the construction of a plant for the centralized processing of the wastes and gigantic equipment with high energy consumption is required.In collecting the wastes,environmental risks have to be considered.Nano emulsion at normal temperatures can rapidly separate oil from oil-bearing wastes,providing a good base for the "treatment while producing" of oil-bearing wastes.In laboratory study,a mixture of a surfactant,a secondary surfactant and water in different rations was further mixed with n-octane in a ratio between 1 ∶ 9 and 5 ∶ 5.The final mixture was agitated with supersonic wave at frequencies between 10-100 Hz to obtain a Winsor Ⅳ type single phase nano emulsion NR-A.The particle size,D90,of the NR-A emulsion measured on a laser particle size analyzer was 1 1 nm,and the interfacial tension between oil and water,as measured with the DuNouy method,was only 1.35 mN/m.The Zeta potential of the emulsion system was greater than 50 mV,indicating that the system was a thermodynamic dispersion.Adding the NR-A into oil-bearing wastes,the oil phase of the wastes can be desorbed from the solids under low energy consumption through fast mass transfer and ultra-low interfacial tension.Laboratory evaluation showed that when 0.5％ NA-R was mixed with oil-bearing wastes from shale gas drilling,after agitation at room temperature for 20 min,95.7％ of the oil-on-waste was desorbed from the wastes.The desorbed oil can be used as the base oil for mixing oil base drilling fluids,realizing the efficient treatment and recycling of oil-bearing wastes.关键词
钻井液/含油废物/纳米乳液/界面张力/低能耗/深度脱附Key words
Drilling fluid/Oil-bearing waste/Nano emulsion/Interfacial tension/Low energy consumption/In-depth desorption分类
能源科技引用本文复制引用
李家学,叶艳,冯觉勇,张謦文,何新兴,周意程..超低界面张力纳米乳液处理含油作业废物的研究[J].钻井液与完井液,2017,34(6):1-7,7.基金项目
中石油科技创新基金“页岩气作业含油废物低能深度脱附机理及处理技术研究”(2015D-5006-0306) （2015D-5006-0306）
国家自然科学基金创新研究群体项目(51521063)和塔里木油田项目“钻完井废弃物环保处理技术调研及方案优选”(201015110022). （51521063）
