鼠李糖脂/槐糖脂/有机碱复配驱油体系的界面性能及驱油效率  

Interface Performance and Oil Displacement Efficiency of Rhamnolipid/Sophorolipid/Organic Alkali Compound Oil Displacement System

作　　者：王哲 梁生康[1,2] 李俊峰 宋丹丹[1,2] 郑江鹏[1,2] 宋永亭 WANG Zhe;LIANG Shengkang;LI Junfeng;SONG Dandan;ZHENG Jiangpeng;SONG Yongting(College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao,Shandong 266100,P R of China;The Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingdao,Shandong 266100,P R of China;College of Marine Science and Biological Engineering,Qingdao University of Science and Technology,Qingdao,Shandong 266045,P R of China;Petroleum Engineering Technology Research Institute,Shengli Oilfield Company,Sinopec,Dongying,Shandong 257000,P R of China)

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [3]青岛科技大学海洋科学与生物工程学院,山东青岛266045 [4]中国石油化工股份有限公司胜利油田分公司石油工程技术研究院,山东东营257000

出　　处：《油田化学》2021年第3期492-498,共7页Oilfield Chemistry

基　　金：国家自然科学基金“生物表面活性剂增效修复疏水性有机物-重金属复合污染土壤机制研究”(项目编号41371314);山东省重点研发计划“基于生物表面活性剂的环境友好型溢油分散剂的研发”(项目编号2017GHY15117);自然资源部海洋生态环境科学与工程重点实验室开放基金“胶州湾近海粪便指示菌的时空分布特征及其陆源污染输入的指征意义”(项目编号MESE-2019-05)。

摘　　要：为降低无机碱/表面活性剂二元驱油体系对油藏地层环境的损害,提高驱油体系的生物可降解性,研究了生物表面活性剂鼠李糖脂(RL)、槐糖脂(SL)与乙醇胺(MEA)等有机碱复配体系的界面性能,并通过岩心驱替物模实验评价了复配体系强化胜利油田沾三区块原油的驱替效率。Rubingh规则溶液理论模型计算结果表明生物表面活性剂复配体系中RL和SL分子可在表面吸附层自发吸引,协同降低溶液的表、界面张力;“RL/SL”体系中SL占比小于0.3时,协同效应较强。当表面活性剂质量分数为0.15%(SL占二者质量分数为0.2)、乙醇胺为3.5%时,RL/SL/MEA复配体系可将油水界面张力降低至9×10^(-3)mN/m,达到超低界面张力数量级范围。岩心驱替物模实验表明,RL/SL/MEA驱油体系可在水驱基础上提高原油采收率24.13%。RL/SL/MEA复配体系在三次采油领域具有一定的应用潜力。To reduce the damage of the inorganic alkali/chemical surfactant dual oil displacement system to reservoir formation,improve the biodegradability of the oil displacement system,the interface performance between the biosurfactant rhamnolipid(RL)/sophorolipid(SL)/monoethanolamine(MEA)or other organic alkali compound oil displacement system and the crude oil was analyzed,and through core displacement model,experimental evaluation of the enhanced oil recovery of RL/SL/MEA compound system to Shengli oilfield Zhan 3 block was carried out.The calculation results of Rubingh regular solution theoretical model showed that the RL and SL molecules in the biosurfactant mixed system could spontaneously attract on the surface adsorption layer and synergistically reduce the surface and interfacial tension of the solution.When the ratio of SL to the total surfactants was less than 0.3,the synergistic effect was stronger.The RL/SL/MEA compound system with 0.15%surfactant(SL accounts for 0.2 of both)and 3.5%MEA,could make oil-water interface tension reduce to 9×10^(-3) mN/m,reaching the order of magnitude range of ultra-low interinterface tension.Core displacement model experiments showed that RL/SL/MEA oil displacement system could enhance oil recovery by 24.13%based on the water flooding.The RL/SL/MEA oil displacement system has a certain application potential in enhancing oil recovery of oilfield.

关 键 词：生物表面活性剂 有机碱 协同效应 超低界面张力 原油采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]