岩性油气藏 ›› 2012, Vol. 24 ›› Issue (5): 111115.doi: 10.3969/j.issn.1673-8926.2012.05.021
叶安平1,郭平1,王绍平2,徐艳梅3,程忠钊4
YE Anping1, GUOPing1, WANGShaoping2, XU Yanmei3, CHENGZhongzhao4
摘要:
目前气体-原油分子扩散系数的研究对象多为单组分气体-原油体系,而且多在低温或者低压下在 PVT 筒中进行实验,与实际的注气过程相差较大。在这种情况下,研究了多孔介质中高温高压下多组分气 体-原油的扩散系数,测试了全直径岩心中多组分气体-凝析油、多组分气体-重质原油在60 ℃,20 MPa 条 件下的扩散系数。研究结果表明:原油组分对扩散有一定影响,但对于最终扩散程度影响不大;气体在凝析 油中的扩散系数高于其在重质原油中的扩散系数;扩散系数以幂函数形式逐渐增加,最终逐渐趋于平缓。
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