低渗透油藏泡沫改善CO_2驱油效果研究  

Study of foam assisted CO_2-EOR in low permeability reservoir

作　　者：马涛[1,2] 吕成远[1] 吉树鹏[3] 周国华[1,2] 王海波[1] 李树军[3] 肖在馨[3] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石化海相油气藏开发重点实验室,北京100086 [3]中国石化东北油气分公司工程技术研究院,吉林长春130062

出　　处：《陕西理工学院学报（自然科学版）》2016年第6期41-46,共6页Journal of Shananxi University of Technology:Natural Science Edition

基　　金：中国石油化工股份有限公司科技攻关项目(P11006)

摘　　要：针对腰英台油藏特点及CO_2性质研制了由阴离子型表面活性剂和两性离子型表面活性剂组成的起泡体系。长期热稳定性实验表明,在97.4℃老化120 d,起泡能力仍保留78.8%。形成泡沫后最大阻力系数达到87,注气5PV后阻力系数仍然在20以上。3个井组的矿场实验表明:注CO_2泡沫后,吸气剖面得到有效改善,吸气层位增加;生产井含水率下降,产油量增加或者结束递减,其中4-6井组产油量增加11.89%;生产井产气量上升的势头得到抑制,P1井产气量由1 018 m3/d降至680.4 m3/d。The foam agent composed of anionic surfactants and amphoteric surfactants was prepared according to the Yaoyingtai oil reservoir characteristics and property of CO2. Long-term thermal stability test showed that the foaming ability remains 78.8% after the agent aging 120 days at 97.4 ℃. The foam can produce a resistance factor up to 87. The resistance factor still remains at more than 20 after gas was injected 5 PV. The field tests containing three injection wells showed that the gas entry profiles of injection wells were changed effectively, and the water content of production liquid drops, and oil production increases. The produce of well 4-6 increases by 11.89%. The gas production of Pl-well falls from 1 018 m^3/d to 680.4 m^3/d.

关 键 词：低渗透 二氧化碳 泡沫 半衰期 矿场实验 

分 类 号：TE357.3[石油与天然气工程—油气田开发工程]