摘要
通过测定铬冻胶2种工作液在不同温度、pH值下的粘度变化,评价了2种工作液的化学稳定性。试验结果表明,第一工作液(Na_2Cr_2O_7体系)在温度大于75℃时,稳定性极差;与第一工作液相比,第二工作液(Na_2SO_3体系)的化学稳定性随温度升高变化较缓。2种工作液在pH值较低时稳定性极差,在pH值较高时稳定性较好。
Chemical stability of the two operating fluids of Cr gel were evaluated by determining their viscosity un-
der different temperature and pH. The results showed that the stability of the first operating fluid (Na2Cr2O7 system) was very bad at > 75 ℃, the stability of the second operating fluid(Na2SO3 system) changed slowly with temperature increment by comparison with the first operating fluid. The stability of the two operating fluids were very bad at low pH and good at higher pH.
出处
《精细石油化工进展》
CAS
2002年第2期22-23,共2页
Advances in Fine Petrochemicals
关键词
油层
低渗透地层
铬冻胶
双液法
化学稳定性
堵水
调剖
Cr gel,double - fluid method,chemical stability,water shutoff,profile control
