在松辽盆地嫩江沿岸钻井过程中经常遇到塌、漏、阻、卡现象，尤以青山口组的青２、３段问题突出，主要表现为：起钻遇卡不严重，但下钻遇阻严重，需划眼６～７ｄ．嫩８井采用具有封堵防塌能力的聚合物钻井液体系和相应的工程措施，顺利地钻达目的层，技术经济效益显著。 In the process of drilling in the Nenjiang River, Songliao Basin, the phenomenon of collapse, leakage, resistance and card are often encountered during the drilling process. In particular, the problem of blocks A2 and F3 in the Qingshankou Formation is outstanding. The main problems are as follows: Seriously serious, need to plan eye 6 ~ 7d. In Well N8, the polymer drilling fluid system with plugging and anti-collapse capability and the corresponding engineering measures are adopted to smoothly drill the target layer with remarkable technical and economic benefits.