海上稠油油田二氧化碳驱注入参数优化

渤海某稠油油田原油粘度高，储层物性好，油藏非均质性较强，在注水开发过程中，由于油水粘度差异大和非均质性较强，水驱开发效果并不理想。为了更好地开发稠油油藏，为油田提高采收率决策提供依据，针对油田的特点，利用室内实验方法，对影响二氧化碳驱油效果的主要因素进行了评价，优化了二氧化碳驱注入参数。结果表明，水—二氧化碳段塞交替驱能够显著改善驱油效果，段塞大小是影响驱油效果的敏感参数，注入速度对驱油效果的影响不明显。

Optimizing Injection Parameters of Heavy Oil for Carbon Dioxide Flooding in Offshore Oilfield

An Offshore heavy oilfield has good reservoir properties and strong reservoir heterogeneity. During the course of water flooding, because of the oil-water viscosity variation and strong heterogeneity, the effect of water flooding is not satisfactory. In order to develop heavy oil and enhanced oil recovery, providing the basis decision-making for EOR, according to the characteristics of the oil field, the influence of carbon dioxide flooding the main factors were evaluated and optimized the injection parameters of carbon dioxide flooding by using simulation experiments. The results show that water-carbon dioxide alternate driving can significantly improve the flooding effect, the size of slug is sensitive to the effect of water-carbon dioxide alternate driving, and oil displacement effect of injection rate is not obvious.