Warning parameter and system for water breakthrough in high-yielding wells,Tahe Oil Field

High-yielding wells have accounted for the mainoutputs of fractured vuggyreservoirsin theTahe Oil Field;however,productions have been decreasing quickly dueriety of water breakthrough and the complexity of production dynamicsto water breakthrough.Thevaof karst fractured vuggyreservoirs were studied.Based on the analyses of water breakthrough characteristics,with bottomflooding theory,the warning parameter and system for water breakthrough were proposed.In thiswater breakthrough in wells may be predicted,and the management of wells could be carried out.water-free production period could be prolonged and the production rate could be improved.