摘要
采用减压热脱附技术处理油基钻屑,考察了热脱附温度、热脱附时间和系统真空压力对脱油率的影响,在此基础上,采用响应面分析法建立了各因素与脱油率之间关系的数学模型,优化了工艺参数。实验结果表明,在热脱附温度350~450℃、系统真空压力-0.07~-0.09 MPa、热脱附时间60~90 min的条件下,脱油率可达98%以上。各因素对脱油率的影响依次为热脱附温度>系统真空压力>热脱附时间;在热脱附温度420℃、系统真空压力-0.08 MPa、热脱附时间80 min的最佳工艺条件下,平均脱油率为98.67%,与模型计算值(100%)仅相差1.33%,剩余固体的平均含油率为0.37%。回收油的组分与0号柴油基本一致,可用于配制钻井液。剩余固体中未发现重金属元素和放射性元素,能够满足《页岩气勘探开发油基岩屑处理方法及控制指标》(GB/T 41518—2022)中“可用于油气田建设基础材料”的要求。
The oil-based drilling cuttings were treated by vacuum-assisted thermal desorption technology.The effects of thermal desorption temperature,thermal desorption time,and vacuum pressure of the system on the oil removal rate were investigated.On this basis,response surface methodology was used to establish a mathematical model for the relationship between various factors and oil removal rate,and the process parameters were optimized.Under the conditions of thermal desorption temperature of 350℃to 450℃,system vacuum pressure of-0.07 MPa to-0.09 MPa,and thermal desorption time of 60 min to 90 min,the oil removal rate was higher than 98%.The factors affecting the oil removal rate followed the order of thermal desorption temperature>system vacuum pressure>thermal desorption time;Under the optimal process conditions of thermal desorption temperature of 420℃,thermal desorption time of 80 min,and system vacuum pressure of-0.08 MPa,the oil removal rate was 98.67%,which was only1.33%less than the calculated value of the model(100%).In addition,the average oil content of the residual solids was 0.37%.The recovered oil was basically the same components of diesel oil,which could be used to prepare drilling fluids.No heavy metal or radioactive element was found in the residual solids,and the treated sludge could meet the requirements of“basic materials for oil and gas field construction”in the national standard“Evaluation Method and Control Index of Oil-based Cuttings in Shale Gas Exploration and Development”(GB/T 41518—2022).
作者
马树奎
叶绮彤
杨严
冯永存
陈进富
孔繁鑫
MA Shukui;YE Qitong;YANG Yan;FENG Yongcun;CHEN Jinfu;KONG Fanxin(Oilfield Chemistry Research Institute,China Oilfield Services Limited,Tianjin 300459,China;School of Chemical Engineering and Environment,China University of Petroleum,Beijing 102249,China;School of Petroleum Engineering,China University of Petroleum,Beijing 102249,China)
出处
《化工环保》
CAS
CSCD
北大核心
2024年第1期87-93,共7页
Environmental Protection of Chemical Industry
基金
中国海油重大科技攻关项目(CU20221107)。
关键词
油基钻屑
减压热脱附
响应面分析法
回收油
oil-based drilling cutting
vacuum-assisted thermal desorption
response surface methodology
recycled oil
