海上超稠油高温脱水技术研究  

Research on High Temperature Dehydration Technology of Offshore Super Heavy Oil

作　　者：辛迎春[1] Xin Yingchun(SINOPEC Petroleum Engineering Corporation,Dongying 257026,China)

机构地区：[1]中石化石油工程设计有限公司,山东东营257026

出　　处：《山东化工》2024年第11期64-68,共5页Shandong Chemical Industry

摘　　要：某海上超稠油富含胶质和沥青质,原油密度大、黏度高、油水密度差小、原油流动性差,并且油水乳化严重,导致热化学沉降脱水速度慢、脱水周期长。因海上平台空间受限和缺少稀油资源,该超稠油脱水不能采用陆上油田掺混稀油和长时间大罐沉降脱水的常规方法。开展了超稠油高温脱水技术研究,优选出耐高温破乳剂,破乳剂加剂量400 mg/L,在150℃高温、0.6~0.7 MPa压力下沉降4 h,含水15%~65%超稠油的原油含水率均达到<1%,实现了较好的脱水效果。根据室内脱水实验结果,获得海上超稠油高温脱水工艺参数,确定最佳破乳剂加药量、脱水温度和沉降时间,推荐了海上超稠油二段热化学脱水工艺方案。A certain offshore super heavy oil is rich in colloid and asphaltene,with high crude density,high viscosity,small oil-water density difference,poor crude flow,and serious oil-water emulsification,which will lead to slow dehydration speed and long dehydration cycle of thermochemical sedimentation.Due to the limited space of the offshore platform and the lack of thin oil resources,the conventional methods of mixing thin oil in onshore oil fields and sedimentation dehydration in large tanks for a long time cannot be adopted for the dehydration of the super heavy oil.Research was carried out on the high temperature dehydration technology of the super heavy oil,and high temperature resistant and efficient demulsifier was screened out.When the ultra-heavy oil with 15%~65% water content settles for 4 h under 150℃ high temperature and 0.6~0.7 MPa pressure,the water content of crude oil can reach<1%,and a good dehydration effect is achieved.According to the results of laboratory dehydration experiment,the process parameters of high temperature dehydration of offshore super heavy oil were obtained,the optimal demulsifier dosage,dehydration temperature and settling time were determined,and the second stage thermochemical dehydration process scheme of offshore super heavy oil was recommended.

关 键 词：超稠油 反相点 耐高温破乳剂 高温脱水 

分 类 号：TE866[石油与天然气工程—油气储运工程]