层内自生 CO2吞吐机理数值模拟研究

层内自生CO2技术是一种新的增油方式。在所建立的真实油藏单井径向模型的基础上，通过数值模拟研究，得出层内自生CO2吞吐可以降低原油粘度、膨胀原油体积、抽提原油中的轻质组分；生气剂注入速度过快会形成生气剂溶液对原油的驱替，不利于吞吐的进行，而焖井时间越长，吞吐的效果越好。因此，在自生CO2吞吐过程中应适当降低生气剂注入速度和延长焖井时间。

Study on numerical simulation of in-situ generating CO2 stimulation mechanism

In-situ generating CO 2 technology is a new way to increase oil recovery .Based on the radial model of real reservoir single well ,numerical simulation results showed that the in -situ generating CO 2 stimulation can reduce the vis-cosity of crude oil and swell the volume of crude oil ,and extract light component of the crude oil;the slower the injected rate of generating gas chemical solution ,the longer the soak time ,the better the increased oil recovery is .Therefore the in-jected rate of the generating gas chemical solution should be reduced and the soak time should be prolonged in the process of in-situ generating CO 2 stimulation .