摘要
油田开发后期,注入二氧化碳能使原油黏度和残余油饱和度降低,从而大幅度提高原油采收率。基于修正的二氧化碳混相驱油的分流量方程,通过特征线法求解建立的模型,分析有效黏度比、垂向非均质性、含油饱和度、气水交替注入比等因素对二氧化碳混相驱替的影响。结果表明,有效黏度比越大,非均质程度越强,含油饱和度越低,交替注入比越大,油藏采收率就越低。这对于二氧化碳驱开发早期评价驱替效果具有很高的参考价值。
The injection of carbon dioxide in the late period of oilfield development can reduce viscosity of crude oil and saturation of residual oil, which consequently increase recovery. This paper, based on correction of the flow equation of carbon dioxide miscible flooding, establishes a model by the method of characteristics to analyze the impacts of effective viscosity ratio, vertical heterogeneity, oil saturation, and water alternating gas on carbon dioxide miscible flooding. The results show that the more effective the viscosity ratio, the higher the vertical heterogeneity, the lower the oil saturation and the more the water alternating gas, the lower the oil recovery. This method is of high value to evaluate the early stage of carbon dioxide miscible flooding.
出处
《资源与产业》
2013年第1期60-63,共4页
Resources & Industries
基金
CO2驱油与埋存潜力评价及战略规划(2011ZX05016-006)
关键词
二氧化碳
埋存
特征线法
混相驱
carbon dioxide
storage
method of characteristics
miscible flooding
作者简介
通讯作者：姜宝益（E—mail：baoyi．jiang@yahoo．com．cn）
