摘要
针对高温高盐的严重非均质油藏,提出了交联-预交联复合调驱的技术设想,以进一步挖掘开发中后期高含水油藏的剩余油潜力,交联-预交联复合调驱结合了两种调驱剂不同的驱油机理,以实现驱替过程中的调堵协同作用。为验证技术可行性,复合调驱技术首先在文25东块实施,试验共选择了9个井组,实施完成7个井组,共注各种调驱剂7.9226×104m3,总体效果实现了注入压力升高、改善波及体积的目的,试验累积增油8305t,是单纯预交联调驱增油效果的1.3倍。
In light of reservoirs with high temperature,high salinity and high heterogeneity,this paper proposed the technique of using crosslinked polymer and pre-crosslinked gel agent for complex displacement to further exploit remaining oil potential during high water-cut stage.These two profile control agents are of different oil displacement mechanisms and act as coordination of flooding and plugging.In order to testify the validity of the technique,field tests have been made in selected 9 well groups in Wenliu-25 east block,of which 7 have been fulfilled,injecting agents of 7.922 6×104 m3 in total.The results show higher injection pressure and improved sweep efficiency.The amount of cumulatively increased oil reaches 8 305 t,corresponding to 1.3 times that of simply using pre-crosslinked agent in effectiveness.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2005年第3期290-292,共3页
Xinjiang Petroleum Geology
关键词
非均质油藏
剩余油潜力
驱油机理
调驱剂
复合调驱技术
Zhongyaun oilfield
high temperature
high salinity
cross-linking agent
polymer
displacement mechanism
field test
