摘要
介绍了考虑有机固相沉积的三维四相(油相、气相、水相和有机固相)多组分数学模型和三相相平衡热力学模型。为检验和评估考虑有机固相沉积作用的三维四相(油相、气相、水相和有机固相)多组分模型,在完成油藏流体的高压PVT实验数据相态和沥青沉积实验的三相相平衡拟合计算以后,对一组长岩心气水交替驱替实验数据进行了数值模拟对比研究工作。研究结果表明,一方面在注气提高原油采收率过程中,有机固相可能在地层中发生沉积,另一方面表明有机固相沉积将会对数值模拟计算结果产生负面影响。改进的多组分数值模拟软件能更好地描述注气过程中油藏流体在孔隙介质中渗流的力学特征和物理化学特征,从而能更准确地认识注气提高原油采收率过程中油藏的开发动态规律。
This paper presents a multi-compositional mathematical model of 3-D and 4-Phase (oil, gas, water and organic solid) and an equilibrium thermodynamic model of 3-Phase. In order to verify and evaluate the multi-compositional model, the numerical simulation study of long-core water alternate gas displacement experiment is conducted after fulfilling the PVT phase behavior experiment and 3-Phase fluid phase equilibrium experiment of asphaltene precipitation. The results show that in the process of gas injection for EOR, the organic solids precipitation could occur in the oil-gas reservoir, and thus a negative effect appears on the numerical simulation results. This improved multi-compositional simulator can be used for better description of the reservoir fluid dynamic flow characters and physico-chemical features in the porous media, hence better understanding of the reservoir performance for EOR by gas injection process.
出处
《新疆石油地质》
CAS
CSCD
2004年第5期505-508,共4页
Xinjiang Petroleum Geology
基金
"油气藏地质及开发工程国家重点实验室"开放基金资助项目(PLN9902)
关键词
有机固相沉积
三维四相
注气
固相
数值模拟
3D and 4-Phase
multi-composition
long core
numerical simulation
organic solid
gas injection
