砾岩油藏二元复合驱油体系各组分吸附规律  

Absorption of Each Chemical Component during the Process of Surfactant/Polymer Flooding in Conglomerate Reservoir

作　　者：吕建荣 陈丽华[1] 霍进[1] 许长福[1] 谭锋奇 程宏杰[1] 张德富[1] LU Jianrong;CHEN Lihua;HUO Jin;XU Changfu;TAN Fengqi;CHENG Hongjie;ZHANG Defu(Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,P R of China;College of Earth and Planetary Scienees,University of Chinese Academy of Scienees,Beijing 100049,P R of Chitin;Key Laboratory of Computational C.eodynamics,Chinese Academy of Sciences,Beijing 100049,P R of China)

机构地区：[1]中国石油新疆油田公司,克拉玛依新疆834000 [2]中国科学院大学地球与行星科学学院,北京100049 [3]中国科学院计算地球动力学重点实验室,北京100049

出　　处：《油田化学》2018年第3期492-498,共7页Oilfield Chemistry

基　　金：国家油气重大专项"化学驱提高采收率技术"(项目编号2016ZX05010-004);中国科学院大学校部青年教师科研启动基金"砾岩油藏化学体系驱油机理研究"(项目编号55103BY00)

摘　　要：为揭示二元复合驱体系各组分在非均质性强、孔隙结构呈复模态的砾岩油藏中的吸附损失,研究了石油磺酸盐(KPS)/部分水解聚丙烯酰胺(HPAM)二元体系在克拉玛依油藏砾岩岩心表面的静态吸附和动态滞留规律。结果表明,HPAM和KPS在单矿物和砾岩岩心表面的静态吸附量均随初始浓度的增加而增加并逐渐稳定;KPS在各单矿物表面的吸附量大于HPAM;由于物质组成和表面结构的差异,黏土矿物的吸附量高于骨架矿物。二元复合驱油体系(0.3%KPS+0.18%HPAM)各组分的静态吸附量与矿物活性中心的作用力强弱成正比。由于存在竞争吸附关系,二元复合驱溶液中HPAM与KPS在砾岩岩心表面的静态吸附量均小于单一组分的吸附量。HPAM与KPS在砾岩岩心表面的静态吸附量小于黏土矿物、大于骨架矿物,主要的吸附作用发生在黏土矿物表面。二元复合驱油体系中HPAM与KPS的动态滞留量与砾岩岩心渗透率呈负相关关系;受岩心比表面积及水对化学剂稀释解吸的影响,二元复合驱油体系中KPS的动态滞留量低于静态吸附量;受岩心孔隙结构及比表面积的影响,HPAM的动态滞留量小于静态吸附量。In order to reveal the adsorption and lost amount of each component in surfactant/polymer（SP）flooding system for conglomerate reservoir with strong heterogeneity and complex model pore structure,the static adsorption and dynamic retention laws of petroleum sulfonate（KPS）and polyacrylamide（HPAM）on the surface of conglomerate core in Karamay reservoir were studied. The results showed that the static adsorption amount of HPAM and KPS on the surface of single mineral and conglomerate core increased with increasing initial concentration and then kept unchanged. The adsorption amount of KPS on each single mineral was more than that of HPAM. Because of the difference of material composition and surface structure,the adsorption amount of clay mineral was more than that of rock skeleton mineral. The static adsorption amount of each component in SP flooding system（0.3%KPS ＋ 0.18% HPAM）was proportional to the strength of mineral active center. Because of the competitive adsorption effect,the static adsorption amount of HPAM and KPS in SP flooding system on conglomerate core surface was less than that of single chemical component. The static adsorption amount of HPAM and KPS on conglomerate core surface was less than that of clay mineral but more than that of skeleton mineral. The main absorption effect occurred on the surface of clay mineral. The dynamic retention amount of HPAM and KPS in SP flooding system was negative correlation with the permeability of conglomerate core.Because of the influence of core specific surface area and the dilution of water to chemical agent,the dynamic retention amount of KPS in SP flooding system was lower than its static absorption amount. The dynamic retention amount of HPAM was less than static absorption amount due to the effect of pore structure and specific surface area.

关 键 词：砾岩油藏 聚合物 表面活性剂 静态吸附 动态滞留 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]