稠油油藏注CO2适应性研究

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。

Adaptability of CO2 Injection for Heavy Oil Reservoir

In order to get convenient and practical criterion of cyclic CO 2 injection for heavy oil reservoir, selecting Gaosheng and Lengjiabao reservoir as examples and using numerical simulation and reservoir engineering methods, the adaptability of cyclic CO 2 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 CO 2 huff-n-puff and CO 2 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 CO 2 huff-n-puff and velocity of injection is the most sensitive process parameter for CO 2 flooding. The conclusion is significant for selecting proper heavy reservoir to inject CO 2.