摘要
在水驱油田的动态分析和预测中,水驱曲线可用于预测油田的含水率、可采储量以及评价油田的开发动态等。结合油田实例和相关文献调研发现,俞启泰型水驱曲线在预测油田含水率变化时更为方便准确。《一种预测水驱油田体积波及系数的新方法》一文在该曲线的基础上推导出预测体积波及系数的新公式,但在推导过程中存在不合理性,因此对其进行了修正。利用胜坨油田T21断块开发数据,将新公式和修正后的公式分别与陈元千基于甲、乙、丙型水驱曲线推导出的体积波及系数与含水率公式进行对比发现,修正后的公式与陈元千的甲、乙、丙型体积波及系数与含水率关系曲线具有很好的一致性,而新公式与甲、乙、丙型体积波及系数与含水率关系曲线差异较大,表明新公式有其不合理性。修正后的公式不仅具有适用油田类型更为广泛的优点,而且计算结果更加合理准确,应予以推广。
In the dynamic analysis and prediction of water drive oilfield,water drive curve can be used to predict water cut and recoverable reserves and evaluate dynamic development of oilfields. Through literature research and case study of oilfield,the survey found that Yu Qitai water drive curve was more convenient and accurate on predicting oilfield water cut. In the paper of A new method for prediction of volumetric sweep efficiency in water-drive oilfield,the authors deduced a new formula of predicting the volumetric sweep efficiency based on Yu Qitai water drive curve. However,irrationality existed in the process of its derivation,it was modified in this study and a revised one was proposed. Using the development data from T21 fault block in Shengtuo oilfield,the results of the two formulas,curves showing correlation between volumetric sweep efficiency and water cut,were respectively compared with that of Chen Yuanqian's formula derived from Type-A,Type-B and Type-C water drive curves. The result of the revised formula has very good consistency with that of Chen Yuanqian's formula;but the result of the original formula is different from that of Chen Yuanqian's formula,which shows its irrationality. The revised formula is not only more widely applicable for different field types,but has more reasonable and accuratecalculation result,and should be popularized.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2016年第1期96-100,共5页
Petroleum Geology and Recovery Efficiency
关键词
水驱油田
水驱曲线
体积波及系数
含水率
预测
water drive oilfield
water drive cure
volumetric sweep efficiency
water cut
forecast
