稠油油藏注CO2适应性研究

ADAPTABILITY OF CO2 INJECTION FOR HEAVY OIL RESERVOIR

罗瑞兰 程林松

Luo Ruilan Cheng Linsong

石油大学石油天然气工程学院, 北京 102249

University of Petroleum, Beijing

为了得到方便实用的稠油油藏注CO2选井标准,以辽河油田的高升、冷家堡油藏为例,运用数值模拟和油藏工程方法对稠油油藏注CO2吞吐/驱替进行了适应性研究,得出了CO2吞吐/驱替的适应性参数。可以看出,CO2吞吐和CO2驱替对油藏参数和施工工艺参数的要求有很大不同。研究表明,原油黏度和含油饱和度是影响CO2换油效果最敏感的油藏参数;而周期注入量(CO2吞吐)和注入速度(CO2驱替)是影响CO2换油效果最敏感的施工工艺参数。所得的结果对选择合适的稠油油藏实施恰当的注CO2工艺有一定的指导意义。

In order to get convenient and practical criterion of cyclic CO2 injection for heavy oil reservoir, selecting Gaosheng and Lengjiabao reservoir as examples and using numerical simulation and reservoir engineering methods, the adaptability of cyclic CO2 injection for heavy oil reservoir has been studied and adaptable parameters have been obtained. Form the adaptable parameters, we can see there are a quite few differences between the parameters of CO2 huff-n-puff and CO2 flooding.The results shows oil viscosity and oil saturation are the most sensitive reservoir parameters, while cyclic injection amount is the most sensitive process parameter for CO2 huff-n-puff and velocity of injection is the most sensitive process parameter for CO2 flooding. The conclusion is significant for selecting proper heavy reservoir to inject CO2.

10.3969/j.issn.1000-7393.2004.05.021