微纳孔隙油-水-岩石微观界面相互作用研究进展  

Research progress on oil-water-rock interface interaction in micro-nano porous medium

作　　者：戴彩丽[1,2] 曹梦娇 吴一宁[1,2] 王奉超 金旭[4] 李琳[1,2] 赵明伟[1,2] DAI Caili;CAO Mengjiao;WU Yining;WANG Fengchao;JIN Xu;LI Lin;ZHAO Mingwei(Shandong Key Laboratory of Oilfield Chemistry,China University of Petroleum(East China),Qingdao 266580,Shandong Province,P.R.China;Key Laboratory of Unconventional Oil&Gas Development,China University of Petroleum(East China),Qingdao 266580,Shandong Province,P.R.China;School of Engineering Science,University of Science and Technology of China,Hefei 230027,Anhu Province,P.R.China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,P.R.China)

机构地区：[1]中国石油大学(华东)山东省油田化学重点实验室,山东青岛266580 [2]中国石油大学(华东)非常规油气开发教育部重点实验室,山东青岛266580 [3]中国科学技术大学工程科学学院,安徽合肥230027 [4]中国石油勘探开发研究院,北京100083

出　　处：《深圳大学学报（理工版）》2021年第6期551-562,共12页Journal of Shenzhen University(Science and Engineering)

基　　金：国家重点研发计划资助项目(2019YFA0708700)

摘　　要：低渗、特低渗储层孔隙小,与岩石壁面直接接触且受壁面束缚的原油占比远高于常规储层,导致大量油膜黏附在岩石壁面难以被剥离,严重制约了低渗及特低渗油藏高效开发.传统的黏附功理论存在局限性,微纳米级孔喉中大量原油受岩石壁面强作用力束缚,油膜-岩石间黏附力成为制约油膜剥离效果的主要因素.介绍了纳米力学技术解析油-水-岩石间微观相互作用方法,如原子力显微镜、分子动力学模拟等,并聚焦油-固界面,归纳了二者间强相互作用,油膜与岩石之间除了存在经典Derjaguin-Landau-Verwey Overbeek(DLVO)理论中的范德华力和双电层相互作用外,还存在非DLVO相互作用(疏水作用和离子桥连作用等).总结油膜岩壁黏附机理的研究进展,探讨高效剥离油膜、提高低渗油藏采收率所面临的挑战,并对精确解析油-水-岩石间微观相互作用研究前景进行展望.Low/ultra-low permeability reservoirs have small pores,and the proportion of crude oil directly contacting with the rock and bound by the rock wall is much higher than that of conventional reservoirs,resulting in a large number of oil films difficult to be stripped.This seriously restricts the efficient development of low/ultra-low permeability reservoirs.The traditional adhesion work theory has limitations.A large number of crude oil in micro-nano pore throats is bound by the strong force of rock wall,and the adhesion force between oil film and rock becomes the main factor restricting the oil film peeling effect.This paper introduces the methods of analyzing oil-water-rock microscopic interaction by nanomechanics,such as atomic force microscope and molecular dynamics simulation.Focusing on oil-solid interface,the strong interaction between them is summarized.Nanomechanical analysis of the microscopic interface interactions among oil-water-rock shows that there are not only typical Derjaguin-Landau-Verwey Overbeek(DLVO)interactions(i.e.,van der Waals and electrical double-layer interactions),but also non-DLVO interactions,such as hydrophobic and ion bridging interactions.This review focuses on the oil-rock interface interactions,summarizes recent research progress of the adhesion mechanism and the strong interaction between oil-rocks,discusses the challenges faced by efficient stripping of oil film and improving oil recovery in low permeability reservoirs.Finally,challenges and future prospects of this field are discussed.

关 键 词：油气田开发工程 提高采收率 微纳孔隙 纳米力学技术 分子动力学 油膜黏附机理 洗油效率 界面相互作用 

分 类 号：TE357[石油与天然气工程—油气田开发工程]