MD-1膜驱剂溶液的界面特性研究  

A Study on Interfacial Properties of Aqueous Solution of Molecular Deposition Filming Flooding Agent MD-1

作　　者：高芒来[1] 佟庆笑[1] 孟秀霞[1] 

机构地区：[1]石油大学(北京)化工学院,北京102249

出　　处：《油田化学》2003年第1期74-77,共4页Oilfield Chemistry

基　　金：中国石油天然气股份公司导向试验基金资助(B9802)。

摘　　要：以非离子、阳离子、阴离子表面活性剂烷基酚聚氧乙烯醚OP 10、十六烷基三甲基溴化铵CTAB、十二烷基苯磺酸钠SDBS作对比剂,在20℃用吊环法实验测定了膜驱剂MD 1(一种单分子双季铵盐)水溶液的表面张力和界面张力。MD 1水溶液的表面张力基本上不随溶液浓度而变,其值约71.5mN/m,比纯水表面张力理论值仅约低2%,说明MD 1不具有表面活性,是表面非活性物质。模拟油(1%胶质沥青质的煤油溶液,胶质沥青质为辽河兴隆台原油在体积比2∶3的甲醇/苯中的沉淀物)与MD 1水溶液之间的界面张力在MD 1浓度增至25mg/L时开始下降,250mg/L时降至稳定值(20mN/m左右),只下降36%,不形成低界面张力体系。界面张力下降是MD 1在界面吸附富集的结果。模拟油与1000mg/LOP 10+MD 1混合水溶液之间的界面粘度随MD 1浓度(0,300,500mg/L)增加而降低,降低幅度在低转动角速度下随角速度增加而增大,在高角速度下趋于一致。由于OP 10不具有与MD 1相互作用的基团,加入MD 1引起界面粘度(即界面膜强度)降低,是MD 1与胶质沥青质作用的结果。图4参10。The surface and interfacial tension of aqueous solution of molecular deposition filming flooding agent MD1, an organic diammonium compound, at 20℃ are determined by using lifting ring method in comparison with nonionic, cationic and anionic surfactants alkylphenylpolyoxyethylene OP10, cetyltrimethylammonium bromide CTAB and sodium dodecylbenzene sulfonate SDBS. The surface tension of the solution practically does not change with MD1 concentration, being of 71.5 mN/m ca, a value by 2% lower than the theoretical value for pure water, which shows that MD1 possesses no surface activity and is not a surfactant. The simulation oil used is 1% resinasphaltenes solution in kerosene and the resinasphaltenes are obtained from crude oil of Xinglongtai, Liaohe, as insoluble fraction in 2/3 (v/v) methanol/benzene mixture. The interfacial tension between the simulation oil and MD1 solution begins to lower when MD1 concentration increases to 25 mg/L and reaches stable value of 20 mN/m ca when MD1 concentration≥250 mg/L and the largest decrease 36% indicates that the oil/water system under study is one of high interfacial tension. The decrease in interfacial tension originates from adsorbed and enriched MD1 molecules in the interfacial films. The interfacial viscosity between the simulation oil and mixed 1 000 mg/L OP10+MD1 aqueous solution decreases with increasing MD1 concentration (0,300, and 500 mg/L) and the decrement increases with increasing angular rotation rate in low rotation rate range and becomes practically unchanged in high rotation rate range. As there is no groups in OP10 molecules to interact with MD1 molecules the decrease in interfacial viscosity (in interficial film strength) caused by MD1 introduced results from the interaction between MD1 and resinasphaltenes.

关 键 词：MD-1膜驱剂 界面特性 研究 分子沉积膜 双季铵盐化合物 水溶液 表面张力 油水界面张力 界面粘度 

分 类 号：TE39[石油与天然气工程—油气田开发工程] TE357.46