一种预测聚合物驱含水率及可采储量的简单方法  

A Simple Method to Predict Water Cut and Recoverable Reserves in Polymer Flooding

作　　者：刘美佳[1] 宋考平[1] 张建国[2] 刘丽[1] 朱珺琼[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]长庆油田公司勘探开发研究院,陕西西安710021

出　　处：《石油钻探技术》2007年第5期98-100,共3页Petroleum Drilling Techniques

基　　金：国家自然科学基金项目"油层多孔介质内纳米渗流动力学模型"(编号:10172028);黑龙江省杰出青年基金"油层多孔介质内纳观渗流界面作用力研究"资助

摘　　要：针对周志军等建立的聚合物驱驱替特征模型较为复杂、应用不方便,且后续水驱阶段预测偏差较大的问题,将该模型用麦克劳林级数展开,推导出d(Wp-aNp3)/dNp与Np在直角坐标系下存在线性关系。提出了将该线性表达式积分求解,就能得到Wp与Np的三次多项式关系式,并结合大庆油田北一二排西区块详细说明了求解过程。该关系式不但可以用来预测聚合物驱区块的含水率和可采储量,而且还能够预测出单井在其控制范围内的可采储量。将预测值与实际值进行比较,无论区块还是单井,相对误差均小于5%。Considering the complicity and higher predicted water cut in the polymer flooding model developed by Zhou Zhijun, expanding this model by Maclaurin series, a linear relation was obtained between d（Wp-aNp^3）/dNp and Np in Cartesian system. Then the relation between Wp and Np can be obtained by solving the linear formula through integral. The detailed solving process was illustrated using north-Ⅰ and Ⅱ blocks in Daqing Oilfield. The formula can be used to predict the water cut and recoverable reserves of blocks with polymer flooding, as well as the well＇s recoverable reserves in its drainage area. The comparison between the predicted and the actual value indicate that the relative error is less than 5% in block and well level. This method is simple and better practical application.

关 键 词：聚合物驱 含水率 可采储量 产能预测 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]