介绍了形成严重井漏的地质概况.在条20井的施工中,通过多种堵漏技术和工艺的具体实践,一方面保证顺利施工,另一方面摸索最有效的工艺和方法,达到快速、优质钻进的目的.现场应用表明,选择合适粒径的桥塞剂是桥塞复合承压堵漏的关键；桥塞复合承压堵漏+高黏坂土随钻桥浆强钻能很好地解决该区块井漏的问题,达到了防漏、提高地层承压能力和减少漏失的效果.%Introduce the geological information of sever loss well, under the drilling of T20 well, by using ways of well loss technical and technologies, on one side making sure the smooth drilling , on the other side finding a best technology and method, to achieve fast and economical drilling. On field application, the suitable size of bridging agent is the very key point of bridging compound bearing sealing; bridging compound bearing sealing and high-vis Bentonite slurry while drilling can effectively solve this field's well loss, and accomplish preventing loss,enhancing formation bearing ability and decreasing loss.
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