According to the drilling difficulties of surface joint development, loose structure and strong permeability; rich sandy conglomerate and quartz sandstone, good abrasiveness and weak drillability as well as regional difference, the detailed countermeasures were made to control seepage, optimize drilling fluid system and bit system, improve penetration rate and prevent the failure of bottom hole assembly. The block drilling speed is largely improved in the application and implementation, and a set of comprehensive drilling speed increasing technique suitable to Changnan block preliminarily formed.