榆林某气田污水回注井堵塞原因分析  

Analysis on Wastewater Reinjection Well Blocking Reason of a Gas Field in Yulin

作　　者：白海涛[1] 王新强[1] 吕乃欣 高燕[3] 姬虎军[4] 

机构地区：[1]西安石油大学油气田环境污染与储层保护重点实验室 [2]中国石油集团石油管工程技术研究院 [3]川庆钻探工程有限公司长庆井下技术作业公司 [4]中国石油大港油田公司第二采油厂

出　　处：《石油与天然气化工》2011年第6期636-638,645,共4页Chemical engineering of oil & gas

基　　金：陕西省自然科学基金资助项目(2001JY001)

摘　　要：分析了榆林某气田污水回注井堵塞原因,为现场解堵施工的优化提供了实际和理论依据。通过对污水回注系统中回注罐沉积物组成分析和沉积物上清液水质分析来研究污水回注井堵塞原因和机理。回注罐罐底沉积物粒径大、含油量高、CaCO3和酸不溶物含量占其质量的50%以上,回注罐底部水中细菌含量远远高于回注污水水质指标。由此得出:污水回注井堵塞原因可能为悬浮固体或残油导致的孔隙通道堵塞、回注污水与地层水不配伍或自身引起的结垢堵塞和微生物繁殖造成的有机物堵塞。The blocking reason of wastewater reinjection well was studied by analyzing components of sediment on the bottom of reinjection tank and supernatant water,which provides practical and theoretical basis for optimizing.Results of these experiments show that grain size of sediment is large;oil content of sediment is high;50% or more of sediment qualities are CaCO3 and acid non-soluble substance;bacteria content in supernatant water exceeds the national standard obviously.The conclusion is: wastewater reinjection wells may be blocked because of suspended solids or pore channels blocked by oil residue;reinjection wastewater and formation water is not compatible;self-induced scaling congestion and microbial reproducing organisms congestion.

关 键 词：气田 回注井 污水 堵塞 罐底沉积物 

分 类 号：X741[环境科学与工程—环境工程]