超低渗油藏CO_2水气交替驱实验研究  

Laboratory investigation of miscible CO_2 WAG process in extra-low permeability reservoir

作　　者：周星泽 廖新维[1] 赵晓亮[1] 高建[1] 罗彪[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《陕西科技大学学报（自然科学版）》2016年第6期120-124,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家973科技计划项目(2011CB707302);国家自然科学基金项目(U1262101);国家重点基础发展研究计划项目(2015CB250905)

摘　　要：鄂尔多斯盆地超低渗、特低渗储量丰富,水驱开发产量递减快,中后期含水率高,效果不理想.CO_2驱是提高采收率的主要技术之一,但该技术在我国运用存在多方面的问题.水气交替作为结合气驱和水驱优势的方法,具有较高的适用性.开展物理实验模拟鄂尔多斯盆地安塞油田超低渗A区水气交替驱油效果,分析注入压力、注入速度、段塞大小、气水段塞比值对驱油效率的影响.结果表明保持较高压力、中等注入速度、段塞0.2PV、气水比1∶1循环注入,驱油效率高,CO_2注入量少.研究结果对超低渗油藏实施CO_2水气交替工艺技术以及增加CO_2驱在我国的适用性有参考价值.Ordos basin has billion tons of extra-low permeability oil resources.Using conventional water flooding caused the rapid decline in output,high moisture content,which is difficult to enhance oil recovery.CO_2 flooding has become the main technology of enhanced oil recovery in the United States,but the technology has a variety of problems in Chinese oil field.Water-alternating-gas process as a way of combining advantages of gas flooding and water flooding has higher applicability.Analyze the different parameters′influence on recovery efficiency.By changing the injection pressure,injection rate,slug size,gas,water slug ratio study the changing rule of the oil displacement efficiency,pressure and influx.The results of the study of extra-low permeability reservoirs CO_2 WAG technology increase the applicability of the CO_2 flooding in our country and have a reference value of implementation of the technology.

关 键 词：CO2驱 水气交替 注采参数 提高采收率 超低渗 

分 类 号：TE341[石油与天然气工程—油气田开发工程]