喇嘛甸油田二类油层聚合物驱指标变化规律

Change regularity of development indexes of second type reservoir with polymer flooding in Lamadian Oilfield

周志军^1.2 张国芳^1.3 陈建康⁴ 王福平³

东北石油大学提高油气采收率教育部重点实验室，黑龙江 大庆 163318 东北石油大学非常规油气成藏与开发省部共建国家重点实验室培育
基地，黑龙江 大庆 163318 哈尔滨石油学院油气田开发教研室，黑龙江 哈尔滨 150028 中国石油渤海钻探工程有限公司，天津 300457

二类油层与一类油层地质特征的差异，决定了它们的聚合物驱动态特征有着很大的不同。为了研究二类油层聚合物驱的动态特征，基于二类油层地质特征和聚合物驱开采的特点，利用油藏工程方法，对大庆喇嘛甸油田３个二类油层注聚合物区块的动态开发指标进行分析研究。结果表明：注入压力与累计注聚孔隙体积倍数呈对数关系；注采压差与注入压力呈线性关系；含水率与累计注聚孔隙体积倍数呈多项式关系；在开采一定时间后，累计产液量的对数与累计产油量呈线性关系。在此基础上建立了二类油层聚合物驱开发指标变化规律的数学模型，经过现场实际数据验证，各数学模型的计算精度能满足生产需要，均可实现对二类油层聚合物驱开发指标的有效预测。

The differences between the second and the main layer result in a big difference in polymer flooding performance. In order to study polymer flooding performance in the second layer, based on geological characteristics of the second type reservoirs and polymer flooding, this article studies and analyzes the dynamic development indexes of three polymer blocks of the second type reservoirs of Lamadian Oilfield in Daqing by reservoir engineering method. The results show that a logarithmic relationship is between injection pressure and cumulative pore volume of polymer injection, a linear relationship between differential pressure and injection pressure, a polynomial relationship between water cut and cumulative volume of polymer injection, a linear relationship between cumulative fluid producing rate and cumulative oil production. Mathematical models are set up respectively and tested by the actual data, prediction precision meets the engineering demand, which are very helpful to predict the development indexes of the second type reservoirs.

10.6056/dkyqt201505015