泡沫复合驱在胜利油田的应用  

Application of foam combination flooding in Shengli Oilfield

作　　者：周国华[1] 宋新旺[1] 王其伟[1] 郭平[1] 李向良[1] 李雪松[1] 

机构地区：[1]中国石化胜利油田地质科学研究院

出　　处：《石油勘探与开发》2006年第3期369-373,共5页Petroleum Exploration and Development

基　　金：中国石化集团公司先导试验项目(P03004)

摘　　要：针对胜利油区孤岛油田中二区中部Ng3+4油层和埕东油田西区油藏条件,进行了泡沫复合驱实验研究。封堵调剖实验表明,泡沫复合驱具有优良的封堵调剖能力,其封堵能力随渗透率增加而增大;气液共注时,阻力因子随注入量增加而持续增大,交替式注入时,阻力因子随注入量的增加波动上升,但随着注入量不断增加,两种方式均能产生较好的封堵效果;低气液比交替注入时,封堵作用表现缓慢;大段塞交替注入时,封堵效果相对较弱。驱油效率实验表明,泡沫复合驱比水驱提高采收率20%以上,发泡剂对矿化度、温度及原油性质等油藏条件改变均不敏感,适应性强。孤岛油田中二区中部Ng3+4油层实施单井试注后,生产井增油降水效果显著,注入井吸水剖面明显改善。An experimental study about polymer-surfactant foam combination flooding was done in the reservoir conditions of the central part of Block 2 in central Gudao Oilfield and the western Chengdong Oilfield. The blocking ability of the flooding system rises with the increasing core permeability. The resistance factor of gas and liquid commingled injection grows with the injection rates rising while that of gas and liquid alternative injection wavily rises with the injection rates rising, however both the methods can produce better blocking effect. When it is injected alternately with a low gas/liquid ratio, the blocking effect is generated more slowly; when it is alternately injected at big-size slug, the blocking effect is worse than at smallsize slug. The oil recovery factor increases by over 20%o than that of water flooding. The foam agent is not sensitive to salinity, temperature and oil, and has a stable displacement effect. In the field test in Gudao Oilfield, production wells got obviously increased oil with less water, and water injection wells had the input profiles greatly improved.

关 键 词：泡沫复合驱 提高采收率 物理模拟 阻力因子 气液共注 气液交替式注入 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]