Research on Water Plugging Threshold of High Water Cut Wells & Zones of Zhongyuan Oilfield

Suitable water shutoff time of high water cot wells zones was researched based on aspects in which water shutoff may influence production of oil reservoir. The minimum of water cut in plugging formation is between 94 to 95 percent. The oil reservoirs, in which the horizontal contradiction of cil reservoir created by selection of injection production well pattern or reservoir heterogeneity is large, were plugged. The detailed factors of water shutoff and its limit was submitted combining with the practices in Zhongyuan Oilfield.