Based on indoor testing and formation characteristic of Liuxi area,KPAM-NPAN-SMP-BYL polymer anti-sloughing drilling fluid systems were optimized.

• 在室内试验的基础上,优选出了适应于该地区地层特点的KPAM-NPAN-SMP-BYL聚合物防塌钻井液体系。