塔河油田12 区块奥陶系油藏储层非均质性强烈、油水关系复杂，油井出水是导致产量下降的主要原因。见水井水体来源主要包括漏失液及酸压残留液、缝洞单元底部驱替残留水和酸压沟通的缝洞单元下部水体。漏失液产出一般呈含水下降型，对生产影响不大。底部残留水和下部水体的产出因水体能量、油水界面高度和储层垂向渗透性的差异而不同。对具有不同水体来源及出水特征的井采取相应的稳油控水措施，可以有效提高油藏最终采出程度。

The heterogeneity of the reservoir of Ordovician systemin Tahe Oilfield is serious, and the water-oil relation is complex, water breakthrough in the oil well is the main reason that causes production drawdown. The sources of the water body in the water breakthrough well include the leakage fluid and the acid fracturing fluid remained, relic water in the bottom of the fracture-cave unit. The water body in the lower part of the fracture-cave unit is connected by acid fracturing. The output of the leakage fluid always presents the pattern of water cut decline which has low influence on the production. The output of the relic water and the water body in the lower part are different because of the energy of the water body, the height of the oil-water contact and the difference of the vertical permeability. It is a effective way to enhance the ultimate degree of reserve recovery in the reservoir that take steps to stabilize oil production and control water cut of the different resources of the water body and different characteristics of water breakthough.