CO2混相驱拟含气率与采出程度图版的建立  

Establishment of the Chart of Equivalent Gas Ratio-Recovery Degree for CO_2 Miscible Flooding

作　　者：孙雷[1] 冯乔[1] 陈国利[2] 张华[2] 靳美玉 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610500 [2]中国石油吉林油田公司,吉林松原138000 [3]库尔勒巴音郭楞职业技术学院,新疆库尔勒841000

出　　处：《西南石油大学学报（自然科学版）》2014年第1期83-88,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：十二五国家科技重大专项“CO2驱油藏动态监测与方案优化技术”(2011ZX05016–005)

摘　　要：针对Y区块注CO2混相驱动态开发评价方法不够全面不够系统、利用水驱童氏图版评价气驱开发效果不够准确等特点,首先定义了A型气驱特征曲线,在此基础上推导了适合Y区块的CO2混相驱拟含气率和采出程度的关系式,绘制了CO2混相驱特征理论图版,用改进后的图版预测了Y区块注CO2后所提高的最大采收率,并将预测的采收率与现场预测的采收率进行比较,其结果比较吻合,说明该图版能很好地预测CO2混相驱动态开发效果,同时对该区块下一步的开发及评价具有指导意义。Because the dynamic evaluation methods of CO2 miscible drive is not enough comprehensive and systematic, and also the improved water flooding chart is not suitable for the evaluation of the CO2 miscible drive, we first define the type A gas flooding characteristic curve. Then on the basis of it, we have derived the relational expression between the equivalent gas rate and recovery degree, and draw the calibration chart. We use this chart to predict the biggest increased recovery of Y block after injecting CO2, and by comparing with the scene results, we find that two of them are consistent. So the results that the chart is a good predictor of the biggest increased recovery after injecting CO2. In general, this method is more significant for the block＇s further development.

关 键 词：CO2混相驱 拟含气率 采出程度 提高的最大采收率 图版 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]