油藏多孔介质中泡沫体系的阻力特性评价及应用  

Evaluation and application of resistance characteristics of foam system in reservoir porous media

作　　者：尤源[1] 岳湘安[1] 韩树柏 赵仁保[1] 冯兵[1] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]中国石油辽河油田金马采油厂,辽宁盘锦124010

出　　处：《中国石油大学学报（自然科学版）》2010年第5期94-99,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家科技重大专项(2008ZX05024-02);国家'973'重点基础研究发展规划项目(2006CB705805);国家科技支持计划项目(2007BAB17B05和2006BAB03B06)

摘　　要：为了建立多孔介质中泡沫体系阻力特性的有效评价方法,并依据此法指导泡沫体系的应用,以辽河油田海外河区块储层物性为例,通过物理模拟研究多孔介质中泡沫体系的阻力效应;提出多孔介质中泡沫封堵强度和有效期的量化指标,研究注入段塞、气液比及段塞组合对封堵效果的影响,并利用正交试验对上述参数进行优化;通过驱油试验考察优化后的泡沫体系改善波及系数、稳定产油速度、控制含水率的作用机制及提高采收率的效果。结果表明:所获取的量化指标能客观反映出多孔介质中泡沫体系的特性;试验条件下气液比和段塞组合对泡沫封堵强度和有效期的影响最大;优化后的体系在非均质储层模型中的两次封堵都取得了明显的增加产油速度和降低含水率的效果,提高采收率10%左右。In order to develop an effective evaluation method of resistance characteristics of foam in porous media and its application,the performance of foam in porous media and its mechanism for production stabilization and water-cut control in reservoir were studied. The experimental factors were selected according to physical properties of fluid and reservoir in Haiwaihe block,Liaohe Oilfield. The equilibrium resistance coefficient and the porous volume of water injection before foam failure were defined as the indexes representing plugging strength and valid period respectively. The influence of slug size,gas liquid ratio, slug combination on plugging effect was studied. Then,those factors were optimized using orthogonal test. The function of optimized foam to improve sweep efficiency,stabilize production,control water-cut and enhance oil recovery efficiency were also studied. The results show that,two defined indexes objectively reflect the real characteristics of foam in porous media and can be effectively referenced. Gas liquid ratio and slug combination are the most important factors influencing plugging strength and valid period under the given conditions in the case. Two rounds of plugging after water flooding all have effects on decreasing water-cut and increasing oil production. The oil recovery efficiency can be enhanced by 10% in average.

关 键 词：油藏 多孔介质 泡沫体系 评价方法 阻力特性 海外河区块 

分 类 号：TE327[石油与天然气工程—油气田开发工程]