现河稠油乳化降粘剂体系的室内研究.pdf

第42卷第4期
应用化工
2013年4月
Applied Chemical Industry
Apr.2013
现河稠油乳化降粘剂体系的室內研究
刘鹏,唐善法2,何宏',程利民1
(1.中国石油大学(华东)石油工程学院,山东青岛26655;2.长江大学石油工程学院,湖北荆州434023
摘要:通过对在模拟地层水中的溶解性、降低界面张力以及乳化降粘能力的评价,研究了OP-10、OP-20、双子表面
活性剂GA848以及CA12-4-12用于现河稠油的乳化降粘性能,并对稠油乳化降粘机理进行了探究。结果表明,这
4种表面活性剂乳化剂在模拟地层水中均具有良好的溶解性,CA84-8用于现河稠油时,能达到超低界面张力,稠
油降粘率都在99%以上,使得井筒流体粘度在20mPa?s以内,完全可被举升到地面。因此,CA8-48是一种最
为有效最适合于现河稠油井筒乳化降粘的乳化剂。
关键词:现河稠油;降粘率;超低界面张力;乳化降粘;表面活性剂
中图分类号:TE357文献标识码;A文章编号:1671-3206(2013)04-0692-04
Laboratory study of emulsifying viscosity reducer
in Xianhe heavy oil
LIU Peng, TANG Shan-fa', HE Hong, CHENG Li-min
(1. Faculty of Petroleum Engineering, China University of Petroleum(East China), Qingdao 266555, China
2. Faculty of Petroleum Engineering, Yangtze University, Jingzhou 434023, China)
Abstract: Properties of the surfactant OP-10, OP20, gemini surfactant GA8-4-8 and GA12 4-12 applied
to Xianhe heavy oil were studied in terms of evaluation on solubility in the simulated agent formation wa
ter, decreasing interfacial capacity, the capacity of emulsifying and viscosity reduction. The mechanism of
the viscosity reduction by emulsifying of heavy oil was also investigated. The results showed that these four
kinds of emulsifiers have good solubility in te simulated formation water. The interfacial tension of GA8
4-8 and Xianhe crude oil could be ultralow compared to the others. At the range of experimental tempera-
ture, the viscosity reduction rate of the heavy oil is more than 99%, and the viscosity of webore fluid is
less than 2 000 mpa. s, so the fluid can be held fully rise to the ground. Therefore, GA8-4-8 is one of the
most effective emulsifier and most suitable for viscosity reducer by emulsification of Xianhe heavy oil well-
bore among these four emulsion viscosity reducers.
Key words: Xianhe heavy oil viscosity reduction rate; ultralow interfacial tension; emulsification viscos
ity reduction; surfactant
随着常规原油的可采储量的减少,稠油将成为化降粘显得十分重要。稠油乳化降粘的目的是
21世纪重要能源资源,稠油的开发也越来越引起人选取合适的乳化降粘剂,使高粘度稠油乳化,形成
们的重视。现河稠油主要分布在乐安油田及王家岗0/W乳状液,降低稠油的粘度,减少稠油的流动阻
油田,其稠油油藏含油面积60.3km2,地质储量力,降低流度比,从而提高稠油采收率。本文通过降
10459万t,粘度高达10000mPa?s。储层埋藏浅低油水界面张力能力、乳化能力以及降粘能力的评
(<1500m),储层以砾岩、砂岩为主,孔隙度10%价,研究了OP-10、OP-20、硫酸酯双子表面活性剂
50%,渗透率300x103~6000x10um2,储GA84-8和GA124-12等4种表面活性剂对现河稠
层非均质性严重。稠油含有较高的胶质、沥青质,粘油的乳化降粘能力,并对稠油井筒乳化降粘机理进
度大,流动性差,开采难度很大,因此对稠油进行乳行了研究。
收稿日期:2012-12-20修改稿日期:2013-01-02
作者简介:刘鹏(1988-),男,湖北黄石人,中国石油大学(华东)在读硕土研究生,师从王业飞教授,主要从事提高采收率
理论及技术的研究。电话:1365542826,E-mail:liup200702000@126.com