鄂尔多斯盆地致密油藏氮气泡沫吞吐开采潜力研究  

Study on exploitation potential of nitrogen foam huff and puff intight oil reservoirs in Ordos Basin

作　　者：王迪东[1] 欧阳华劲[1] 栾贝贝[1] 焦卫华[2] 冯杰 Wang Didong;Ouyang Huajin;Luan Beibei;Jiao Weihua;Feng Jie(Development Department,Yanchang Oilfield Co.,Ltd.,Yan′an 716000,China;Dingbian Oil Production Plant, Yanchang Oilfield Co.,Ltd.,Yulin 718600,China)

机构地区：[1]延长油田股份有限公司开发部,陕西延安716000 [2]延长油田股份有限公司定边采油厂,陕西榆林718600

出　　处：《能源与环保》2022年第2期193-198,207,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：中国石油集团有限公司“十四五”重大科技项目顶层设计(CNOOC-KJ145ZFXM09-05)。

摘　　要：为提高鄂尔多斯盆地致密油藏开采效果,对氮气泡沫吞吐开采方法进行研究。通过泡沫剂最大吸附量计算、化学剂注入浓度确定与化学剂注入方式选择3部分为氮气泡沫吞吐开采做准备,通过注入气液比、注氮气泡沫时间、焖井时间、吞吐轮次与起泡剂浓度五方面设置了氮气泡沫吞吐开采参数。实验结果表明,氮气泡沫吞吐开采方式采油率高、驱油效率高、含油饱和度高、增油量高,并且地层压力变化幅度小,证明了氮气泡沫吞吐开采方法开采潜力较好。In order to improve the production effect of tight oil reservoirs in the Ordos Basin,the nitrogen foam huff and puff production method was studied.Preparation for nitrogen foam huff and puff production was prepared by calculating the maximum adsorption amount of foam agent,determining the concentration of chemical agent injection and selecting chemical agent injection mode.The nitrogen foam huff and puff mining parameters were set in five aspects of the agent concentration.The experimental results showed that the nitrogen foam huff and puff mining method had high oil recovery rate,high oil displacement efficiency,high oil saturation,high oil increase,and small variation of formation pressure,which proved that the nitrogen foam huff and puff mining method had better recovery potential.

关 键 词：致密油藏 氮气泡沫 吞吐 开采潜力 注入浓度 吸附量 

分 类 号：TE357[石油与天然气工程—油气田开发工程]