小眼钻井及无油管完井在后五家户气田中的应用

APPLICATION OF SLIMHOLE DRILLING AND TUBINGLESS COMPLETION IN THE GAS FIELD HOUWUJIAHU

采用常规钻井及完井方式开发浅层气经济效益不明显 ,为了实现降低开发成本的目标 ,东北石油局首次在该气田应用了小眼钻井及无油管完井 (使用油管作为油层套管固井射孔完井 ,生产中不再下入油管 )技术。作业过程中 ,钻机选择、井控、固井等问题相当复杂。文中介绍了小眼钻井及无油管完井在后五家户气田中的应用情况 ,探讨了钻机选配、井身结构、井控、固井、测试等技术问题 ;分析了机械钻速低的原因 ,优选了PDC钻头、钻井参数 ,提出了提高机械钻速的方法 ,评价了应用这一技术所取得经济效益。

There will be no obvious profit from shallow gas if the regular way is adopted in drilling and completion work.In order to reduce the exploitationcost,slimhole drilling and tubingless completion,in which oil tubing was used as production casing for cementing and perforation completion and afterwards was never used again during the production,was applicated in the Gas Field Houwujiahu for the first time by Northeast Petroleum Administration (NEPA).During the whole process of operation,such problems were extremely complicated as rigs selection,well control and completion and so on.At the same time,many techniques are discussed here such as the selection of rigs,well construction,well control and gas well testing etc..It is also analyzed the reason that the rate of penetration (ROP) is low.Thus,it is put forward some methods of improving the ROP with the optimum PDC bits and drilling parameters.Meanwhile,it is evaluated on the economical benefit from the application of this technique.