Probing the effect of Young's modulus on the plugging performance of micro-nano-scale dispersed particle gels  

作　　者：Zhi-Xuan Zhu Lin Li Jia-Wei Liu Jia Chen Zhong-Zheng Xu Yi-Ning Wu Cai-Li Dai 

机构地区：[1]Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)),Ministry of Education,Qingdao 266580,Shandong,China [2]Shandong Key Laboratory of Oilfield Chemistry,Department of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China [3]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,Shandong,China

出　　处：《Petroleum Science》2022年第2期688-696,共9页石油科学（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2019YFA0708700);National Natural Science Foundation of China(52174054,51804326);Shandong Provincial Natural Science Foundation(ZR2019BEE046)

摘　　要：The effect of mechanical strength of the dispersed particle gel(DPG)on its macro plugging performance is significant,however,little study has been reported.In this paper,DPG particles with different mechanical strengths were obtained by mechanical shearing of bulk gels prepared with different formula.Young’s moduli of DPG particles on the micro and nano scales were measured by atomic force microscope for the first time.The mapping relationship among the formula of bulk gel,the Young’s moduli of the DPG particles and the final plugging performance were established.The results showed that when the Young’s moduli of the DPG particles increased from 82 to 328 Pa,the plugging rate increased significantly from 91.46%to 97.10%due to the distinctly enhanced stacking density and strength at this range.While when the Young’s moduli of the DPG particles surpassed 328 Pa,the further increase of plugging rate with the Young’s moduli of the DPG particles became insignificant.These results indicated that the improvement of plugging rate was more efficient by adjusting the Young’s moduli of the DPG particles within certain ranges,providing guidance for improving the macroscopic application properties of DPG systems in reservoir heterogeneity regulation.

关 键 词：Dispersed particle gel Mechanical strength Young’s modulus Atomic force microscope Plugging performance 

分 类 号：TE39[石油与天然气工程—油气田开发工程]