海塔盆地井壁稳定性研究

海塔盆地地质条件复杂，钻井难度大，钻井过程中经常发生井壁失稳现象，严重制约了该区钻井提速和勘探开发的进程。针对海塔盆地井壁易坍塌的问题，进行了泥页岩理化性能实验，利用实验数据分析预测了海塔盆地井壁稳定性状况，探讨了该地区井壁失稳机理，并制定了相应的防塌对策，为进一步研究适合海塔盆地的钻井工艺关键技术和提高钻速奠定了良好的基础。

Study on sidewall stability in Haita Basin

The geological structure is very complex in Haita Basin, due to the difficult drilling, sidewall instability phenomena happened frequently during drilling process. And it has restricted the drilling speed and the development and exploration process seriously. According to the sidewall collapse problems, physical and chemical properties experiment of mud shale had been operated, then we analyzed and predicted sidewall stability of Haita Basin by experimental data, discussed the collapse mechanism in this area, and established corresponding countermeasures to prevent the collapse which has laid a good foundation for further research on key drilling technology and improving drilling rate in Haita Basin.