Evaluation And Selection Of Deep Profile Control Agents Used In SaNan Oilfields

With extending of the polymer flooding,profile control is one of the methods of improving exploitation efficiency.There are not evaluation methods and acceptance standards of profile control effect,which are definite and normative,we can't evaluate accurately various profile control agents or the same one produced by different manufacturers. In order to improve pertinence of profile control and evaluate efficiency of various profile control agents,the paper carries out research on evaluation and selection of deep profile control agent used in SaNan oilfields.The agents mainly includes volume expansion grain(VEG),compound ion polymer(CIP,namely high concentration crosslinking polymer HCCP),low concentration crosslinking polymer(LCCP),which are used in SaNan oilfield.According to features of various profile control systems,combining with SaNan field tests,through lots of indoor experiment research,the various influence factors of VEG and CIP/HCCP and LCCP are analyzed and researched.The corresponding evaluation methods are established. The quantitative evaluation technical index of profile control agents are determined.According to the method,the systems may improve obviously profile control effect.This research is the first in SaNan Oil Field.If the results are extended in SaNan,it will promote the pertinency of profile control and improve the polymer flooding effect,and has wide application prospect.