阳离子乳液聚合物在YK15H井的应用  

The Application of a Emulsion Cationic Polymer in Well YK15H.

作　　者：陈亮 王立峰 杨兴福 钱晓琳[2] 

机构地区：[1]中石化华东石油局钻井工程公司,江苏镇江 [2]中石化石油勘探开发研究院,北京

出　　处：《钻井液与完井液》2009年第2期120-122,共3页Drilling Fluid & Completion Fluid

摘　　要：雅克拉气田白垩系卡普沙良群地层稳定性差,有多口井在该层位发生了严重的井壁垮塌事故。在分析雅克拉区块井壁失稳原因的基础上,决定在YK15H井钻井液中加入阳离子乳液聚合物,三开前将二开井浆转化为阳离子乳液聚合物钻井液。应用结果表明,阳离子乳液聚合物钻井液的抑制性优于聚磺钻井液,保证了井壁稳定和井下无复杂情况发生,流变性和滤失性能稳定,抗温达140℃;由于使用的乳化石蜡具有良好的防塌润滑作用,减少了润滑剂和沥青类防塌剂的使用,全烃值及荧光级别低,应用的正电性材料对录井无影响;取得了良好的现场应用效果,为该区块同类井的施工提供了参考经验。An emulsion cationic polymer drilling fluid was used in drilling the severely instable hole section of wells in Kapushaliang Formation (cretaceous) in Yakela Gas field. Application of this fluid in Well YK15H showed that the fluid had stable rheology and filtration properties at high temperature (140 ℃), as well as an inhibitive capacity better than polymer sulfonate mud. An emulsified olefin was used to improve the lubricity of the mud, which minimized the use of other lubricant and asphalt inhibitors. The control of the fluorescence level of the fluid eliminated the influence of fluorescence on well logging.

关 键 词：抑制性钻井液 阳离子乳液聚合物 钻井液添加剂 井眼稳定 高温 污染 YK15H井 

分 类 号：TE254.3[石油与天然气工程—油气井工程]