稠油热化学脱水工艺参数优化研究

Optimization in Heavy Oil Thermochemistry Dehydration Process

采用稠油中掺入一定比例稀油的方法,结合所优选的破乳剂,进行了稠油热化学脱水的实验研究。针对所采用的稠油及稀油性质,筛选出4050破乳剂有较好的脱水效果,通过降黏率及脱水效果的对比,确定了掺稀比为1.0。在此基础上,考察了温度、浓度对破乳剂脱水效果的影响,探究了含水率对破乳剂有效浓度范围及破乳有效温度范围的影响。实验结果表明:在一定破乳剂浓度范围内,较低温时可能不存在有效浓度范围,较高温时破乳剂有效浓度范围将会变大;在一定的脱水温度下,含水率由低到高增大时,破乳剂有效浓度范围将会变大;在一定的破乳剂浓度时,含水率由低到高增大时,破乳有效温度范围也将变大。

The experimental study of heavy oil thermochemistry dehydration was carried out on the base ot heavy oll mlxea wlm a certain proportion of diluent oil, combined with the optimization demulsifier. 4050 demulsifier had better dehydration effect for the heavy oil and diluent oil used, and through the comparison of the viscosity reduction rate and the dehydration effect, the ratio of dilute proportion 1 ： 1 was determined. On this basis, the impact of temperature, concentration of demulsifier on dehydration were studied, and the impact of water cut content on the effective concentration range of demulsifier and effective temperature range were also studied. The experimental results show that： at certain demulsifier concentration range, an effective concentration range may not exist at the lower temperature, which will be larger at higher temperatures ; at a certain dehydration temperature, derrlulsifier effective concentration range will be larger as water cut content increases; at a certain demulsifier concentration, demulsification effective temperature range will also be larger as water cut content increases.