The well understanding of interaction forces between single dispersed droplets is crucial to the understanding of emulsion stabilization mechanism.Recently,many studies have reported the direct quantitative measuremen...The well understanding of interaction forces between single dispersed droplets is crucial to the understanding of emulsion stabilization mechanism.Recently,many studies have reported the direct quantitative measurements of interaction forces between 20-200μm single droplet coated polymers by atomic force microscope(AFM).These studies have revealed many important results about the relationship of the interaction forces and the droplet deformation.However,these studies of the quantitative relationship between the measured interaction forces and the separation distance of the front end of the droplet have rarely been reported.Optical tweezer instrument can make it possible to establish the quantitative relationship between the measured force and the separation distance of the front end of the droplet,which will make better understanding of the interaction mechanisms between droplets.Due to the differences of the measuring mechanism between atomic force microscopy(AFM)and optical tweezers,the theory model of AFM measurements cannot be fitted with the force measurement by optical tweezers.We have made an exhaustive comparison of the measuring differences between AFM and optical tweezer instrument in this work.Moreover,we built a numerical model to derive the repulsive pressure through the measured force curve in order to quantify the measured force of two micron-sized oil droplet coated polymers by optical tweezers.Furthermore,the novel method can be extended to other micron-sized emulsion systems,and these findings will be a vital progress on quantitative force measurements between micron-sized droplets.展开更多
基于乳液聚合物和微球的分子设计,采用反相乳液聚合工艺研制了一种稳定有效的超分子乳液聚合物-微球组合调驱体系;对乳液聚合物水解度、分子量进行了优化,并对组合调驱体系的静态性能、动态性能、封堵性能及驱油效果进行了评价。结果表...基于乳液聚合物和微球的分子设计,采用反相乳液聚合工艺研制了一种稳定有效的超分子乳液聚合物-微球组合调驱体系;对乳液聚合物水解度、分子量进行了优化,并对组合调驱体系的静态性能、动态性能、封堵性能及驱油效果进行了评价。结果表明,该组合调驱体系的黏度较单一乳液聚合物大幅提升,能有效解决当前调驱体系在深部高渗条带封堵能力不足的问题。渤海油田C区块应用表明,措施井组单井含水率从92%降至79%,日产油量从19 m 3·d^(-1)升至42 m 3·d^(-1),增油超过6000 m 3。为海上中、高含水油田稳油控水提供了一种有效的解决思路,可在现场推广应用。展开更多
基金the supports of the National Natural Science Foundation of China(2147612121322604)for this work。
文摘The well understanding of interaction forces between single dispersed droplets is crucial to the understanding of emulsion stabilization mechanism.Recently,many studies have reported the direct quantitative measurements of interaction forces between 20-200μm single droplet coated polymers by atomic force microscope(AFM).These studies have revealed many important results about the relationship of the interaction forces and the droplet deformation.However,these studies of the quantitative relationship between the measured interaction forces and the separation distance of the front end of the droplet have rarely been reported.Optical tweezer instrument can make it possible to establish the quantitative relationship between the measured force and the separation distance of the front end of the droplet,which will make better understanding of the interaction mechanisms between droplets.Due to the differences of the measuring mechanism between atomic force microscopy(AFM)and optical tweezers,the theory model of AFM measurements cannot be fitted with the force measurement by optical tweezers.We have made an exhaustive comparison of the measuring differences between AFM and optical tweezer instrument in this work.Moreover,we built a numerical model to derive the repulsive pressure through the measured force curve in order to quantify the measured force of two micron-sized oil droplet coated polymers by optical tweezers.Furthermore,the novel method can be extended to other micron-sized emulsion systems,and these findings will be a vital progress on quantitative force measurements between micron-sized droplets.
文摘基于乳液聚合物和微球的分子设计,采用反相乳液聚合工艺研制了一种稳定有效的超分子乳液聚合物-微球组合调驱体系;对乳液聚合物水解度、分子量进行了优化,并对组合调驱体系的静态性能、动态性能、封堵性能及驱油效果进行了评价。结果表明,该组合调驱体系的黏度较单一乳液聚合物大幅提升,能有效解决当前调驱体系在深部高渗条带封堵能力不足的问题。渤海油田C区块应用表明,措施井组单井含水率从92%降至79%,日产油量从19 m 3·d^(-1)升至42 m 3·d^(-1),增油超过6000 m 3。为海上中、高含水油田稳油控水提供了一种有效的解决思路,可在现场推广应用。
