摘要
从分析蒸汽驱物理过程入手,建立起蒸汽超覆物理模式,把蒸汽驱过程中的油藏分为具有超覆前缘的四个区:原始油藏区、原油富集区、热流体区和蒸汽区.经过各区超覆前缘等价位置的转换,把超覆物理模式等价转换成活塞式推进物理模式;然后建立各区的物质平衡方程和能量平衡方程,求解出各区中油、汽、水饱和度以及前缘等价位置.提出了综合驱替效率的概念。利用拟驱替效率和面积波及效率计算出各时刻油、气、水、汽(当出现蒸汽突破时)的产出量及油汽比等一系列开发指标,并与经验方法预测结果和蒸汽驱数值模拟结果进行了对比.结果表明,本文模型计算的产量曲线与热采数值模型的计算结果较为吻合.
A geological model of steamflooding the steam overlay model based on itsphysical process is established. The reservoir is divided into four regions: original reservoir, oil bank, hot liquid zone and steam zone. The steam overlay model is transformed into a front advance model by converting the overlay front position into an equivalent position, and the mass balance equations are established for each zone. The positions of each zone and the saturations of oil, vapor and water are caculated with a combined equation. The production parameters are predicted with a real sweep efficiency and pseudo-displacement. The calculation results for two oilfields with this method are in good agreement with those of numerical simulation.
出处
《石油大学学报（自然科学版）》
CSCD
1993年第1期47-52,共6页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
蒸汽驱
解析模型
数值模拟
驱油
Steamflooding
Analytical model: Numerical simulation
Prediction
Development index
