摘要
江苏油田韦2断块注水开发后期出现严重的结垢问题,导致油井炮眼堵塞,产液量下降。为此,分析了该区块油井结垢特点、垢的组成和结垢机理,通过匹配性实验、静态防垢率实验、防垢动力学(结垢诱导期)实验和动态岩心驱替实验对国内外不同防垢剂进行评价,最后筛选出综合性能较好的防垢剂进行现场试验,提出了化学防垢和挤注防垢剂工艺技术。现场使用10个多月,未见结垢迹象,提高了油田产量,取得了良好的经济效益。
Oilfield scale buildup has become a serious problem in many mature fields in China.This paper described the laboratory and field application of scale inhibitor squeeze technique in W2 Block of Jiangsu Oilfield.Scale has been found in perforation holes,casing surface,and tubing in oil production wells after several years of water injection,which could reduce oil production after 4～5 months.The characteristics and mechanisms of scale were analyzed,and the feasibility of chemical antiscale and scale inhibitor squeeze treatment were discussed.Experimental study has been carried out for selection of scale inhibitors.A phosphonate based scale inhibitor has been selected for field trials.Through field application,the good performances on scale inhibition,higher oil production,and good pump efficiency have been obtained.
出处
《钻采工艺》
CAS
北大核心
2009年第4期80-82,121,共3页
Drilling & Production Technology
关键词
油田垢
碳酸钙
结垢机理
防垢剂
挤注
最低有效防垢浓度
oilfield scale,calcium carbonate,scaling mechanism,scale inhibitor,squeeze treatment
