弱凝胶调驱的宏观作用及微观机理认识  

Cognition on Macroscopic Effect and Microscopic Mechanism of Weak Gel Profile Control and Displacement

作　　者：王健[1] 倪聪[1] 王丹玲[2] 曾云香[1] 

机构地区：[1]西南石油大学"油气藏地质及开发工程国家重点实验室",四川成都610500 [2]西南石油大学石油与天然气工程学院,四川成都610500

出　　处：《天然气与石油》2014年第2期39-42,3,共4页Natural Gas and Oil

基　　金：国家科技重大专项"碳酸盐岩缝洞型油藏采油技术完善与应用"(2011ZX05049-003-0031)

摘　　要：为了提高对弱凝胶在"三采"中调驱作用的综合认识,利用微观刻蚀模型和并联岩芯物理模型,从微观和宏观两方面对弱凝胶的调驱机理进行室内实验研究。微观驱替实验结果表明:弱凝胶的调驱机理主要是,弱凝胶能选择性进入大孔道、能使液流改向和黏弹性负压吸油等。并联岩芯物理实验从宏观方面印证了微观驱替实验的结论,并联填砂管在实施调剖后,弱凝胶有选择性地优先进入高渗透水淹层,使低渗透油层得到了十分明显的启动。与此同时,由于弱凝胶是水溶性的,高渗透油层也未发生"堵死"现象。从弱凝胶在孔隙介质中的运移过程和形态变化看,弱凝胶的主要作用是驱,而调只是前期或暂时作用。In order to improve the comprehensive knowledge on weak gel profile control effect, used are the micro etching model and parallel core physical model to conduct lab study on microscopic and macroscopic profile control and displacement mechanism of weak gel. Microscopic displacement experimental results shows that weak gel can enter large pore paths selectively, change liquid flow direction and conduct viscoelastic negative pressure oil absorption. Parallel core physics experiment results have verified the conclusion of microscopic displacement experiment from the macroscopic aspect. At the same time, due to characters of weak gel, the high permeability road is not blocked. Such conclusion can be obtained from migration process and morphological changes of weak gel in pore medium that main function of weak gel is displacement instead of profile control.

关 键 词：弱凝胶 刻蚀模型 并联岩芯 微观 宏观 调驱 

分 类 号：TE357[石油与天然气工程—油气田开发工程]