摘要
为考察二元泡沫复合驱在大庆油田应用的可行性,利用泡沫扫描仪和泡沫驱油装置,在大庆油田油水条件下,考察了α-烯烃磺酸钠(AOS)浓度、聚合物(HPAM)浓度、发泡剂体系注入量及气液比对泡沫复合驱的影响。实验结果表明:二元体系泡沫稳定性随着AOS或HPAM浓度的增加出现极大值,而后降低;二元泡沫复合驱采收率随着AOS或HPAM浓度的增加而增加;在相同浓度和用量的条件下,二元泡沫复合驱效果好于单纯AOS泡沫驱或单纯聚合物驱的效果;增加泡沫注入量有利于提高二元泡沫复合驱的效果,注入量大于0.3 PV时,二元泡沫复合驱采收率趋于缓和;增加气液比有利于提高二元泡沫复合驱的效果,但气液比过大会出现气窜,在气液比为2∶1时,二元泡沫复合驱的采收率达到最佳。
Foam scanner and foam flooding device were used to investigate the impacts of α-olefin sulfonate(AOS) concentration,polymer(HPAM) concentration,the injection rate of foaming agent,and gas / liquid ratio on compound foam flooding in Daqing oilfield.The experiment results showed that the stability of the compound foam flooding system reached a maximum value then decreased along with the increasing of AOS and HPAM concentration;the recovery factor increased with the concentration of AOS or HPAM;under the conditions of same concentration and dosage,the effect of compound foam flooding is better than simplex AOS foam flooding or polymer flooding;increasing foam injection is conductive to improving the flooding effect;when the injection volume is above 0.3PV,the recovery factor curve tends to be flat;increasing gas / liquid ratio is conductive to improving the flooding effect,but high gas / liquid ratio can cause gas channeling;when the ratio is 2 ∶ 1,the compound foam flooding has the optimum recovery factor.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第4期122-126,157,共5页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"化学驱提高采收率技术"(2011ZX05010-004)
关键词
二元泡沫复合驱
α-烯烃磺酸钠
聚合物
注入量
气液比
compound foam flooding
α-olefin sulfonate
polymer
injection volume
gas /liquid ratio
