The zwitterionic polymer drilling fluid system was chosen, and potassium polyacrylatic, organosilicon-potassium humate and acid soluble shielding temporary plugging agent were used to condit.

• 选择了两性离子聚合物钻井液体系,并加入聚丙烯酸钾、有机硅腐植酸钾和酸溶性屏蔽暂堵剂等对钻井液进行调整。