摘要
由于生物柴油中组分的分子结构与白油、柴油存在区别,目前市场上常见的有机土不能很好地分散在生物柴油中。以夏子街天然钠基蒙脱土为基土,确定矿浆浓度与插层剂浓度比值为3︰1,选取4种有机插层剂(ESDS、SSDS、LSDS、BSDS)对蒙脱土层间的可交换阳离子进行取代,试制出了一种适用于生物柴油钻井液的有机土JHA,其胶体率为98%,制备该有机土的最佳反应温度为70℃,时间为1 h,选择的插层剂为ESDS。将3.0%JHA加入到生物柴油中,钻井液动切力在5 Pa左右,API滤失量在21 m L左右,表现出了良好的提切、降滤失效果,并可抗180℃高温。XRD以及FTIR表征结果表明,蒙脱石层间距明显增大,出现了—CH2—的对称和反对称伸缩振动波峰,表明有机插层剂已经插入到蒙脱土层间。为促进生物柴油在钻井液领域的应用提供了实验基础。
Organophilic clays commonly available for use in white oil and diesel oil do not disperse well in bio-diesel oils which have different molecular structures than those of the white oils and common diesel oils.JHA,an organophilic clay,was recently developed through laboratory study.The base clay selected for the study is the Xiazijie Na-bentonite,and four kinds of organic intercalating agents(ESDS,SSDS,LSDS,and BSDS) were tried in the study to replace the interchangeable cations in between the crystal layers of clays.The ratio of the concentration of clay slurry to that of the intercalating agents is 3:1.JHA has colloidal rate of 98%.To make JHA,the optimum temperature for the reaction should be kept at 70℃,the time for the reaction is 1h,and the selected intercalating agent is ESDS.A mud made with 3.0%JHA in bio-diesel has yield point of about 5 Pa,API filter loss of 21 mL,and remains stable at 180℃.Characterization of JHA with XRD and FTIR shows that the c-spacing of JHA is remarkably increased,and symmetric and asymmetric stretching vibration peaks of-CH_2- are observed,indicating that the intercalation agent has been successfully inserted into the crystal layers of bentonite.
出处
《钻井液与完井液》
CAS
北大核心
2015年第6期11-13,103,共3页
Drilling Fluid & Completion Fluid
基金
国家重点基础研究发展计划973项目(2015CB251200)
山东省自然科学基金(ZR2012EEM020)
中央高校基本科研业务费专项资金资助(14CX06030A
15CX02008A)
关键词
生物柴油钻井液
有机土
插层剂
流变性
滤失性
Bio-diesel oil base drilling fluid
Organophilic clay
Intercalation agent
Rheology
Filtration characteristics
