聚合物驱后氮气泡沫驱油特性及效果  

Study on the displacement characteristics of nitrogen foam flooding after polymer flooding

作　　者：赵金省[1] 李天太[1] 张明[1] 李兆敏[2] 杨晓磊[3] 

机构地区：[1]西安石油大学石油工程学院,西安710065 [2]中国石油大学石油工程学院,东营257061 [3]大庆石油管理局钻井工程技术研究院,大庆163413

出　　处：《深圳大学学报（理工版）》2010年第3期361-366,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(50876115);国家科技重大专项基金资助项目(2008ZX05009-004)~~

摘　　要：通过并联岩心模拟不同渗透率级差和驱替历史的非均质储层泡沫流动实验,研究非均质储层中渗透率级差和剩余油分布对泡沫流度调整特性和驱油效果的影响.结果表明,当渗透率级差小于12时,泡沫可以有效调整高低渗透层中的流度差异,在渗透率级差及含油饱和度分布合适时,泡沫在高低渗透层中以等流度驱替;对于不同剩余油分布的非均质储层,泡沫驱效果主要与高渗透层中剩余油的饱和度有关,高渗透层中的剩余油越少,泡沫在高渗透层中的封堵压力越大,可使泡沫和后续驱替流体进一步驱出低渗透层中的剩余油.To study the effect of permeability contrast and residual oil distribution on foam mobility and displacement in a heterogeneous reservoir, parallel cores were used to mimic the process in a lab. The lab tests show that, the foam can effectively adjust the mobility of permeability formations when the permeability contrast is below 12. At reasonable permeability contrast and residual oil distribution, foam can displace oil uniformly in the formations. For a heterogeneous reservoir with high permeability and different residual oil distribution, the effect of foam flooding is mainly determined by residual oil saturation. In a high permeability formation, the less the residual oil, the higher the plugging pressure is. This makes the residual oil displaced by foam and follow-up displacing fluid.

关 键 词：油气田开发 聚合物驱 泡沫驱 多孔介质 驱油效果 

分 类 号：TE357[石油与天然气工程—油气田开发工程]