潮页1井钻探施工技术

Drilling technology for Well Chaoye1

摘要:

潮页1井是在潮水盆地布置的第一口页岩气资源调查井，取心质量要求较高，地层有大段泥页岩层段，易水化剥落，施工难度大。本文着重介绍了潮页1井取心工艺、钻头选型、冲洗液技术及井斜控制技术等相关的施工经验。潮页1井采用大口径绳索取心技术，第四系地层以深全井取心，该技术在甘肃地区鲜有可供参考的施工案例，而该井岩心采取率接近90%。钻进过程中通过选用合理的钻进参数和护壁性能较强的冲洗液体系，解决了施工中遇到的地层“打滑”、井壁稳定性差等技术难点，保障了潮页1井的顺利完工。

Abstract:

The Well Chaoye1 is the first shale gas resource survey well deployed in the Chaoshui Basin. It requires high quality coring. There are large sections of shale in the strata, which are easily hydrated and spalled, making drilling difficult. This article focuses on the experience of the coring process, bit selection, drilling fluids technology and well deviation control technology for the Well Chao1. Large-diameter wireline coring was used Chaoye1, and the full well section below the Quartenary formation was cored. Though there were very few cases with this technology for reference in Gansu, core recovery was achieved close to 90%. During the drilling process, by choosing reasonable drilling parameters and a drilling fluid with strong wall protection performance, the technical difficulties encountered in the formation such as formation slippage and poor wellbore wall stability were solved, and the smooth completion of the well was ensured.