页岩气调查黔地4井钻探技术

A Brief Discussion on the Drilling Technology of Shale Gas Survey in Qiandi Well4

摘要:

黔地4井是部署在渝东南凹陷褶皱带濯河坝向斜南段的一口页岩气地质调查井，全井取心，设计井深2400 m,完钻井深2258 m。项目通过钻探设备、钻具（钻头）选择和井身结构优化设计等，使钻头最高寿命达466 m、钻效提高10%以上。全井平均机械钻速1.78 m/h，钻月效率535 m，其中二开钻月效率704 m，达到了快速、安全钻探目的。

Abstract:

Qiandi well4 is a geological survey well of shale gas deployed in the southern section of syncline on Zhuohe dam in the depression fold belt of southeast Chongqing, whole depth coring was required. The well was designed with the depth of 2400m and completed with 2258m. Through the selection of drill rigs and drilling tools (drill bits) and the optimization design of wellbore structure, the maximum lifespan of the drill bit is up to 466m and the drilling efficiency is increased by more than 10%. The average penetration rate of the whole well is 1.78m/h and drilling-month efficiency is 535m, of which the second section drilling-month is 704m, rapid and safe drilling is realized.