不同助排方式改善蒸汽吞吐效果实验及数值模拟  

Experiment of steam stimulation effect improved by different assisted methods and its numerical simulation

作　　者：佟琳 张国军 康爱红[2] 

机构地区：[1]中国石油大庆油田有限责任公司第-采油厂,黑龙江大庆163712 [2]中国石油塔里木油田公司勘探开发研究院,新疆库尔勒841000

出　　处：《油气地质与采收率》2015年第2期93-97,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金“蒸汽+非凝析气热力泡沫在多孔介质中的运移及滞留机理”(51104165)

摘　　要：由于稠油油藏的蒸汽吞吐开发属于降压式衰竭开采,导致吞吐后期油藏能量不足,蒸汽超覆严重,垂向扫油系数低,开采效果变差。注蒸汽的同时伴注一定量的气体及化学剂辅助蒸汽吞吐可改善流度比,有效改善稠油油藏的开发效果。利用室内单管实验研究了不同助排方式对蒸汽吞吐效果的影响,实验结果表明,与无助排相比,烟道气泡沫助排驱油效率可提高19%。在此基础上,利用数值模拟方法对比多种助排方式对蒸汽吞吐效果的影响,其结果与物理模拟实验结果吻合。综合多方面因素,烟道气泡沫助排效果最佳,其次为氮气泡沫助排,尤其是当地层的非均质性差以及原油粘度较高时,烟道气泡沫辅助蒸汽吞吐的开发效果更为明显。Because the steam stimulation of heavy oil reservoir belongs to the blowdown depleted development,the reser-voir energy can not effectively maintain the supply of liquid and the recovery effect gets worse at later stage of the steamstimulation. Steam overlapping is serious and vertical oil sweep factor is low. Injecting steam with some gas or chemicals toassist the steam stimulation can effectively improve mobility ratio and the development effect of the heavy oil reservoir. Theindoor single tube experiment studied the effect of different assisted methods on the steam drive. The results of the experi-ment showed that the displacement efficiency of flue gas foam assisted steam stimulation could be increased by19% com-pared with that of the steam stimulation. Based on these results of physical simulation experiment,numerical simulationmethods were used to compare the different influences of different assisted methods on the steam stimulation effect. The re-sults accorded with the results of physical simulation experiments. The recovery effect of flue gas foam assisted steam stimu-lation was the best considering many kinds of factors followed by nitrogen foam. When the formation heterogeneity was verypoor and the oil viscosity was very high,the recovery effect of flue gas foam assisted steam stimulation could be more obvi-ous.

关 键 词：蒸汽吞吐 稠油油藏添加剂 助排方式 烟道气 

分 类 号：TE357.41[石油与天然气工程—油气田开发工程]