层内生成二氧化碳增注技术在低渗油藏中的应用  

APPLICATION OF INJECTION-INCREASED BY GENERATION OF CO_2 IN THE LAYERS TECHNOLOGY IN RESERVOIR WITH LOW PERMEABILITY

作　　者：王金迪[1] 谢雪琴[1] 王惠清[1] 肖东[1] 孙晓清[1] 

机构地区：[1]中国石油新疆油田公司准东采油厂研究所,新疆阜康831511

出　　处：《新疆石油天然气》2008年第2期56-58,共3页Xinjiang Oil & Gas

摘　　要：低渗透油藏在注水开发过程中普遍存在注水困难的问题。层内生成二氧化碳增注技术是新疆油田公司2007年推广的一项新技术,与常规增注技术相比,层内生成二氧化碳增注技术有其鲜明的特点,他采用地层内生气技术,产生大量的高能量二氧化碳气体,不仅可以有效解除地层深部污染和孔隙堵塞,降低地层的渗流阻力,达到降压增水的目的,而且生成的二氧化碳气体溶于原油中,可使原油粘度下降,有效的降低油水间的界面张力。同时在注入水前缘形成气液混相带,提高驱油效率。Water injection is difficult for low-permeability reservoir during the waterflooding process. CO_2 Production in Reservoir is a new injection-increased technology widely used in Xinjiang oil field in 2007.Compared with conventional injection-increased technology, CO_2 Production in Reservoir has its distinctive characteristics. By the gas production technology in reservoir, it can produce a large number of CO_2 with high energy, which can remove deep reservoir contamination and pore blockages effectively, reduce the resistance force of seepage flow in formation, and therefore decrease formation pressure and increase water injection. Meanwhile, CO_2 is easy to dissolve in crude oil, also can reduce oil viscosity and decreases the interfacial tension. Moreover, it can form gas-liquid mixed zone in the leading edge of injected water and therefore to enhance oil displacement efficiency.

关 键 词：低渗 层内生成二氧化碳 增注 污染 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]