低渗油藏表面活性剂驱油体系吸附损失研究  

STUDY ON ADSORPTION LOSS OF SURFACTANT FLOODING SYSTEM IN LOW PERMEABILITY RESERVOIR

作　　者：王永宏[1] 韩方 徐飞艳[1] 刘卫东[4] 冯春艳[1] 从苏男 Wang Yonghong;Han Fang;Xu Feiyan;Liu Weidong;Feng Chunyan;Cong Su’nan(Research Institute of Explorition&Development Petro China Changqing Oil Field Company,Xi’an 710018,Shaanxi,China;University of Chinese Academy of Sciences(School of Engineering Science),Beijing 100190,China;Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang 065007,Hebei,China;PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China)

机构地区：[1]中国石油长庆油田公司勘探开发研究院,陕西西安710018 [2]中国科学院大学(工程科学学院),北京100190 [3]中国科学院渗流流体力学研究所,河北廊坊065007 [4]中国石油勘探开发研究院,北京100083

出　　处：《精细石油化工》2021年第5期54-57,共4页Speciality Petrochemicals

基　　金：国家重大科技专项(2016ZX000004-006)。

摘　　要：报道了2种驱油用表面活性剂复配体系重烷基苯磺酸盐/椰油酰胺丙基羟基磺基甜菜碱(HAS/CHSB)与重烷基苯磺酸盐/石油磺酸盐(HAS/CPS)的吸附性能,为体系筛选出合适的牺牲剂。测定了静置与乳化后表面活性剂在油水间的分布情况。实验结果表明:体系HAS/CPS的最佳牺牲剂为四硼酸钠,降低吸附约36.7%;体系HAS/CHSB对应的牺牲剂为羧甲基纤维素钠,降低吸附约38%。多次吸附后,添加牺牲剂后的体系降低油水界面张力的能力受吸附损失的影响明显减弱。体系HAS/CHSB添加牺牲剂羧甲基纤维素钠后能承受9次吸附;体系HAS/CPS添加牺牲剂后,承受6次吸附后,界面张力仍能维持在10^(-3) mN/m。Taking the low permeability reservoir in Changqing Y block as an example,the adsorption performances of two mixture surfactant systems,heavy alkylbenzene sulfonate/coconut amidopropyl hydroxysulfonyl betaine(HAS/CHSB)and heavy alkylbenzene sulfonate/petroleum sulfonate(HAS/CPS),for oil displacement were measured,and suitable sacrificial agents were selected for the different systems.The distribution of surfactant between oil and water after standing and emulsifying was measured.The results showed that the best sacrificial agent of HAS/CPS system was sodium tetraborate,which reduced the adsorption by about 36.7%;The best sacrificial agent of HAS/CHSB system was sodium carboxymethyl cellulose,which reduced the adsorption by about 38%.Through many adsorption experiments,the capability of systems with sacrificial agents to reduce the interfacial tension between oil and water was obviously weakened by the adsorption loss.Especially,the system HAS/CHSB with sacrificial agent of sodium carboxymethyl cellulose could endure nine times of adsorption.After six times of adsorption,the interfacial tension of the system HAS/CPS with sacrificial agent could still maintain in the order of 10^(-3) mN/m.

关 键 词：表面活性剂 牺牲剂 多次吸附 

分 类 号：TQ423[化学工程]