L38区长8油藏表面活性剂驱先导试验开发特征分析
Analysis of development characteristics of surfactant flooding pilot test in Chang 8 reservoir of L38 area
刘军全 1余航 1冷福 1高波1
作者信息
- 1. 中国石油长庆油田分公司第七采油厂,陕西西安 710200
- 折叠
摘要
环江油田超低渗油藏储量、产量占比大,一次井网注水开发后水驱矛盾突出.表面活性剂性能评价结果显示,此次表面活性剂驱试验能大幅降低界面张力,具有抗吸附性、小浓度下改变润湿性等效果,两相共渗区范围扩大,驱油效率可提高5.53%.在L38区中部选取 4个注采井组开展先导试验,连续注入 8 个月后水驱矛盾改善,控水增油效果显著,开发指标变好,水驱动态储量增加 1.07 倍.
Abstract
The reserves and production of ultra-low permeability reservoirs in Huanjiang oilfield account for a large proportion,and the water flooding contradiction is prominent after a well network water injection development.The performance evaluation results of surfactant show that the surfactant flooding test can greatly reduce the interfacial tension,with anti-ad-sorption,change wettability under low concentration and other effects,expand the range of two-phase co-permeability area,and improve the oil displacement efficiency by 5.53%.In the middle of L38 area,four injection and production well groups were selected to carry out pilot tests.After continuous injection for 8 months,the water flooding contradiction was im-proved,the effect of water control and oil increase was significant,the development index was improved,and the water flooding dynamic reserves increased by 1.07 times.
关键词
表面活性剂/超低渗油藏/环江油田/开发特征Key words
surfactant/ultra-low permeability reservoirs/Huanjiang oilfield/development characteristics引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据