渤海油田非离子表面活性剂吸附动力学研究  

Study on adsorption kinetics of nonionic surfactants in Bohai Oilfield

作　　者：联翩 LIAN Pian(CNOOC Entertech-Drilling&Production Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《非常规油气》2023年第6期61-67,81,共8页Unconventional Oil & Gas

基　　金：中海油能源发展股份有限公司重大科技专项“高含凝析油气藏储层伤害评价及增产技术可行性研究”(HFZXKT-GJ2020-01-06)。

摘　　要：为了研究新型非离子表面活性剂银杏总黄酮在渤海油田砂岩表面上的吸附动力学情况,制定合理的化学驱方案设计,采用间歇式实验方案法研究了渤海油田银杏总黄酮(TFG)在破碎砂岩上的吸附特性;根据实验数据拟合不同的吸附平衡和动力学模型,确定各模型的参数,优选与TFG相适应的吸附数学模型。结果表明:1)室温下表面活性剂TFG的临界胶束浓度(CMC)为3.23%,体现出短时快速吸附、长期缓慢吸附的特性;2)TFG的吸附等温线符合Jovanovic模型,预测最大吸附量为16.4mg/g;3)选取准二级动力学模型模拟TFG表面活性剂在砂岩表面的动力学吸附过程,银杏总黄酮分子在吸附剂表面的吸附强度与吸附活性位点或中心数的平方成正比,吸附过程的主要阻力与吸附剂颗粒在吸附剂表面的粘附有关。该研究成果对利用TFG表面活性剂提高渤海油田采收率具有一定指导价值。In order to study the adsorption kinetics of the new total flavonoids of ginkgo with non-ionic surfactant on the sandstone surface in Bohai Oilfield and formulate a rational chemical flooding scheme design,this paper adopts the intermittent experimental scheme method to study the Bohai Oilfield total flavonoids of ginkgo(TFG)on the adsorption characteristics of sandstone;Different adsorption equilibrium and kinetic models are fitted according to the experimental data to determine different parameters of each model and the optimal adsorption mathematical models compatible for TFG are selected.The results show that:1)The critical micelle concentration(CMC)of surfactant TFG at room temperature is 3.23%,which exhibits the characteristics of rapid short-term adsorption and slow long-term adsorption;2)The adsorption isotherm of TFG conforms to the Jovanovic model,the maximum adsorption capacity is predicted to be 16.4 mg/g;3)The quasi-second-order kinetic model is selected to simulate the kinetic adsorption process of TFG surfactant on the sandstone surface,the adsorption strength of ginkgo total flavonoids molecules on the surface is proportional to the square of the number of adsorption active sites or centers,the main resistance of the adsorption process is related to the adhesion of adsorbent particles to the surface of adsorbent.The research results hold a certain guiding value for the usage of TFG surfactants to enhance oil recovery in Bohai Oilfield.

关 键 词：银杏总黄酮 油田化学驱设计 动力学吸附实验 吸附数学模型 

分 类 号：TE319[石油与天然气工程—油气田开发工程]