超稠油燃烧基础参数特征研究

针对超稠油油藏开展火烧油层技术可行性研究的需要,利用自行设计研制的火烧油层物理模拟实验装置,分别采用超稠油、特稠油、普通稠油开展了火烧油层燃烧基础参数物理模拟实验。对比了不同类型稠油门槛温度、燃料消耗量等燃烧基础参数,结合产出油组分及温度场发育特征,分析了超稠油燃烧基础参数特征。研究认为,超稠油油藏开展火烧油层试验是可行的,超稠油门槛温度、燃料消耗量等燃烧基础参数值均高于其他类型稠油;稠油火烧油层的驱油效率与黏度相关,黏度越大其燃料消耗量越大,其最终的驱油效率相对较低;火烧后原油性质发生了明显改善。

Physical simulation research on basic parameters of in-situ combustion for super heavy oil reservoirs

A physical simulation system has been designed and developed to study the feasibility of in-situ combustion for super heavy oil reservoirs. Physical simulation experiments have been carried out for the basic parameters of in-situ combustion by respectively using super heavy oil,extra heavy oil and conventional heavy oil. Basic combustion parameters such as threshold temperature and fuel consumption have been compared for different types of heavy oil. The parameter characteristics of super heavy oil combustion have been analyzed combining with produced oil composition and temperature field characteristics. It has been concluded that in-situ combustion is feasible for super heavy oil reservoirs,whose threshold temperature and fuel consumption are higher than other types of heavy oil. The displacement efficiency of in-situ combustion is related to oil viscosity. The higher the viscosity is,the bigger the fuel consumption is,and the lower the ultimate displacement efficiency will be. Crude oil properties have been substantially improved after in-situ combustion.