Evaluation Of Huaqing Oilfield C6CO₂Flooding Foam System

With the growing proportion of low permeability reservoirs,coupled with lowpermeability oil reservoir is diiffcult, how exploit the low permeability reservoirs rationallyand eiffciently becomes an important issue.Papers based on the HuaC6.qing reservoir characteirstics, first of all to carry out the sixkinds of foaming agent to optimize performance evaluation expeirment, including the testingof these five areas in the pirmaires,concentration, temperature, salt, oil resistance, and finallypreferred ZY-1as a follow-up test foaming agents. Next, based on the parameters of thereservoir crude oil, with a different empirical formula to calculate reservoir of minimummiscibility pressure, and then proceed to obtain reasonable results, then tube test methods, thetwo contact method has been used to teste the minimum miscibility pressure, the expeirmentalresults that CO₂and crude oil can not achieve miscible. Next volume expansion in oildissolved CO₂and viscosity reduction characteirstics of expeirments has been finished, itshowed the trend of the volume and characteristics of the expeirmental data. Followed byasphaltcnc precipitation in the proccss of flooding expeirment, the asphaltene content in theHuaqing C6is rarely. Finally, the foam system lfooding experiments were done to compare thedifferent ways of flooding，the injection method and the slug were studied and optimized to getreasonable results of the expeirments and to interpret them.This thesis is the adaptation and application of the oil through the Huaqing Oilfield CO₂foam flooding, and ultimately1-2kinds applies to China Keicho reservoir CO₂foam lfoodingblowing agent system to determine the CO₂foam flooding miscible conditions,determine theCO₂foam flooding when the bubble plug way.