低渗常规稠油油藏乳化降粘剂的研究  

Viscosity reduction of emulsifier in low permeability conventional heavy oil reservoir

作　　者：宣英龙[1] 王树坤[2] 马德胜[1] 桑国强[1] 

机构地区：[1]中国石油勘探开发研究院提高石油采收率国家重点实验室,北京100083 [2]大庆油田第五采油厂,黑龙江大庆163513

出　　处：《应用化工》2015年第1期48-52,共5页Applied Chemical Industry

基　　金：中石油科技管理部"十二五"重大科技项目(2014-40223-000001)

摘　　要：研究了乳化剂浓度、油水比、剪切速度对扶余原油乳液性质的影响。结果表明,随着乳化剂浓度、油水比和剪切速度的增加,乳液的稳定性逐渐变好。当油水比<55∶45时,乳液为水包油型;>55∶45时,为油包水型。剪切速度45 cm/min时,形成的乳液完全为水包油,随着剪切速度的增大,乳滴颗粒粒径逐渐变小,最后全部为油包水型。乳化剂聚合物二元驱提高采收率幅度高达25.4%,表明乳化具有启动携带降低原油粘度的作用,对低渗常规稠油油藏限压注入提高采收率具有重要意义。The influence of emulsifier concentration,oil-water ratio and shear rate have the greatest impact on Fuyu oil emulsion properties were investigated. With an increase in emulsifier concentration,oil-water ratio,shear rate and stability increases. When oil / water ratio is < 55 ∶ 45,the emulsion is oil-in-water type,and which is > 55 ∶ 45,that is water-in-oil type. When 45 cm / min shear rate in the emulsions,beyond that it is inverted into water-in-oil emulsions. Droplet size measurements reveal that emulsion droplet size decreases with the increasing of oil-water ratio and shear rate. Flooding experiment is also carried out to evaluate the effectiveness of the emulsification for enhanced oil recovery. Enhanced recovery is up to25. 4%,it show that the major contribution of emulsification for flooding is oil emulsifying and viscosity reduction. It is a great significance for the development of low permeability conventional heavy oil reservoir.

关 键 词：低渗 常规稠油 乳化 降粘 波及体积 

分 类 号：TQ027.6[化学工程] TE357.46[石油与天然气工程—油气田开发工程]