摘要
数值弥散效应影响油藏数值模拟结果的精度。基于实际油藏流体和CO_2-原油体系室内实验,建立一维均质模型,研究数值弥散对CO_2多级接触混相驱替过程的影响,比较数值弥散与物理弥散对CO_2混相驱替的影响。结果表明,数值弥散会影响驱替过程中相间传质,数值弥散越大,CO_2会越早突破,导致采收率越低,驱替前缘变得模糊化。数值弥散与物理弥散作用相似,具有相同的数量级,二者存在细微的差别。
Numerical dispersion effect will influence the accuracy of oil reservoir numerical simulation. Based on the actual reservoir fluids and the indoor experiment of CO2-oil system, the 1 D homogeneous model is set up to study the influence of the numerical dispersion on the process of CO2 multiple-contact miscible flooding and compare the influences of the numerical and physical dispersions on CO2 miscible flooding. The numerical dispersion will affect the mass transfer between CO2 and oil. The results show that the former dispersion can impact the interphase mass transfer in the above process, the more serious the numerical dispersion is, the earlier the CO2 breakthrough will be, and finally the lower the recovery will be, and the displacing front will become smeared. Physical and numerical dispersions have similar impacts and the same magnitude, but there are subtle differences between them.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2013年第2期126-129,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
中石油科技创新基金项目"CO_2近混相驱相态及渗流表征研究"(2012D-5006-0201)
关键词
CO2
混相驱
数值弥散
物理弥散
CO2
miscible flooding
numerical dispersion
physical dispersion
