Tazhong is an important carbonate exploration area with abundant hydrocarbon in the Ordovician, but the oil/gas/water distribution is complex and heterogeneous. By statistics and analysis on massive well drilling data and performance curve of producing test water ratio, the idea is revealed that watering style in Yazhong can be classified into four categories as follows: drilling watering, producing test rapid watering, producing test steps watering and producing test intermission watering, and drilling watering>producing test rapid watering>producing test steps watering>producing test intermission watering in watering intensity. Combining the terrain, reservoir and faults, and analyzing the relationship between them and the water distribution, the main factors controlling watering styles were revealed. The water distribution is controlled by the terrain generally; watering style is obviously controlled by reservoir space styles;faults usually act as channels for the water underneath to higher level, and can also reform the reservoir space styles. Different watering styles have one or more ruling factors, based on which, geological models were established for different watering styles.