摘要
油基钻井液产生的含油钻屑大多采用热解析的方法净化处理,但这种高温热解析回收的残余油存在难闻的异味,严重影响了热解析油在油基钻井液中的回收利用效果。通常情况下,物质产生异味的主要原因是其中含有易挥发的异味组分。采用蒸馏方法测定了现场柴油基钻屑热解析油中的低沸点馏分含量,研究了酸解方法、吸附-离心方法以及蒸馏方法对热解析油的异味去除效果,同时,采用气-质联用仪测定了热解析油处理后的组分,分析了热解析油产生异味的原因。结果表明:热解析油中低于150℃的馏分含量为2.5%,这些轻质组分是其产生异味的主要原因。该热解析油经酸解或吸附-离心后,仍然存在一定量的低沸点烯烃等成分,不能去除异味。蒸馏方法能有效去除热解析油中的低沸点馏分,将收集的高沸点馏分油回收用于油基钻井液,异味去除效果明显,现场可操作性强。
Oil cuttings produced in drilling with oil base drilling fluids are generally cleaned by thermal desorption method which,when heating the cuttings at high temperatures,produces bad smelled oils,seriously affecting the recycling and reusing of the oils obtained from the cuttings.Generally speaking,the bad odor comes from the volatile components with bad odor in the oils.Using oil distillation,the low-boiling-point components of the oils desorbed from drilled cuttings(obtained from field diesel oil base mud)were obtained and were deodorized with various methods,such as acidolysis,adsorption-centrifuging and distillation.The components of the oils desorbed from drilled cuttings were ascertained with GLC-MS and the bad odor from the thermally desorbed oils was analyzed.It was found that the content of the fraction in the thermally desorbed oils with boiling point less than 150℃was 2.5%,and it is this light fraction who produces the bad odor.By acidolyzing or adsorption-centrifuging,the thermally desorbed oils still contain some low boiling point olefins,making the bad odor very difficult to remove.Distillation can effectively remove the low boiling point components from the thermally desorbed oils.The high boiling point components can be reused to mix oil base mud.This method is effective and efficient and is easy to perform in field application.
作者
李建林
王昌军
郑延成
LI Jianlin;WANG Changjun;ZHENG Yancheng(Yangtze University College of Chemistry&Environmental Engineering,Jingzhou,Hubei 434023)
出处
《钻井液与完井液》
CAS
北大核心
2019年第6期727-730,共4页
Drilling Fluid & Completion Fluid
关键词
油基钻井液
热解析油
异味去除
组分测定
回收利用
Oil base drilling fluid
Thermally desorbed oil
Deodorize
Component determination
Recycle
