摘要
通过化学驱数值模拟软件UTCHEM - 6.0在岩心实验数据历史拟合中的运用 ,研究了化学驱油机理。研究结果表明 ,当聚合物段塞足够大时 ,聚合物注入时机对最终采收率影响不大。原始含油饱和度大小能够反映岩心孔隙状况和油在岩心中的分布特征。碱能够与原油中的有机酸反应生成表面活性物质 ,有利于降低界面张力 ,采收率增幅达 2 0 %以上。
This paper introduces the application of a reservoir simulator, which can be used in high pH chemical flood, on simulating core experiments of chemical flood. The core flood experiments include polymer flood and alkaline/surfactant/polymer (ASP) flood under three kinds of different remaining oil saturation. The results of both simulation and experiment show that the remaining oil saturation at the start of polymer flood does not affect oil recovery when the amount of polymer used is large enough. The value of initial oil saturation reflects difference of core pore structure and oil distribution characteristics in core. It is also proven by simulation that the actual value of surfactant concentration in the cores is higher than the injected one after alkaline flood due to in\|situ generated surfactant. The better history match of differential pressure and oil recovery between simulation and experiment is quite encouraging, and shows validity of UTCHEM-6.0 simulator. To our experience, it is necessary for model parameters used in the simulator to be adjusted properly to account for salinity levels, pH and in\|situ generated surfactants.
出处
《大庆石油学院学报》
CAS
北大核心
2000年第3期12-19,共8页
Journal of Daqing Petroleum Institute
基金
ProjectsupportedbyTRCofJapanNationalOilCorporationforassistanceinfinancialsupportandsupplyofUTCHE - 6.0simulator.
关键词
采油
化学驱油
组分模型
物理模拟
数值模拟
chemical flood
compositional simulator
physical simulation
numerical simulation
laboratory study
