烷基二磺酸盐/氧化胺复配体系协同增强泡沫性能  

Synergistic enhancement in foaming performance of alkyl disulfonate/amine oxide compound system

作　　者：裘鋆 何秀娟 李应成 马俊伟 沈之芹 崔乐雨 QIU Jun;HE Xiujuan;LI Yingcheng;MA Junwei;SHEN Zhiqin;CUI Leyu(SINOPEC Key Laboratory of Surfactants for Enhanced Oil Recovery,SINOPEC Shanghai Research Institute of Petrochemical Technology Co.,Ltd.,Shanghai 201208,China)

机构地区：[1]中石化(上海)石油化工研究院有限公司中国石化三采用表面活性剂重点实验室,上海201208

出　　处：《精细化工》2024年第6期1284-1291,共8页Fine Chemicals

基　　金：中国石油化工股份有限公司重点科技攻关项目(214075)。

摘　　要：为强化高温高盐油藏条件下表面活性剂的泡沫性能,将十二烷基二苯醚二磺酸钠(DDBS)和椰油酰胺丙基氧化胺(CAO)进行复配制备了二元表面活性剂体系,选择最佳n(DDBS)∶n(CAO)=6∶4的二元表面活性剂体系制备了泡沫封窜剂(SHY-1)。采用罗氏泡沫仪、表面张力仪对二元表面活性剂体系的临界胶束浓度(CMC)、该浓度时的表面张力(γCMC)和泡沫性能进行了测试。采用高温高压泡沫装置、自动岩心驱油装置对SHY-1的性能进行了评价。结果表明,二元表面活性剂体系在界面吸附单层和胶束中的相互作用参数在–3~–7之间,呈中等强度的协同作用;与单一DDBS和CAO相比,二元表面活性剂体系的CMC分别降低了87%和64%,表面张力分别降低了12%和15%,饱和吸附量增加136%和57%。SHY-1耐盐范围宽,在矿化度≤158308 mg/L、Ca^(2+)或Mg^(2+)质量浓度≤10000 mg/L时均具有良好的泡沫性能。在105℃、15 MPa条件下,质量浓度为2500 mg/L SHY-1在多孔介质中原位产生泡沫的表观黏度达到了180 mPa·s。In order to improve the foam performance of surfactants in oil reservoirs with harsh conditions of high-temperature and high-salt,binary surfactant systems were prepared from combination of sodium dodecyl diphenyl ether disulfonate(DDBS)and cocamidopropyl amine oxide(CAO),of which the best binary surfactant system with n(DDBS)∶n(CAO)=6∶4 was used to further synthesize the foam channeling agent(SHY-1).The binary surfactant systems were analyzed for their critical micelle concentration(CMC),surface tension at this CMC(γCMC)and foam properties via Roche foam meter and surface tensiometer,while SHY-1 was evaluated by high temperature and high pressure foam device and automatic core displacement device.The results showed that the interaction parameters of the binary surfactant system between monolayer and micelle were ranging from–3 to–7,showing a moderate strength of synergism.Compared with that of single DDBS and CAO,the CMC of the binary surfactant system was reduced by 87%and 64%,the surface tension was reduced by 12%and 15%,respectively,while the saturated adsorption capacity was increased by 136%and 57%.SHY-1 displayed a wide salinity adaptation range and good foam performance when the salinity was≤158308 mg/L and the mass concentration of Ca^(2+)or Mg^(2+)was≤10000 mg/L.Under the condition of 105℃and 15 MPa,the apparent viscosity of the foam generated in the central position of the porous media with a mass concentration of 2500 mg/L SHY-1 reached 180 mPa·s.

关 键 词：烷基二苯醚二磺酸钠 椰油酰胺丙基氧化胺 协同作用 氮气泡沫封窜 表面活性剂 

分 类 号：TQ423[化学工程] TE357.46[石油与天然气工程—油气田开发工程]