Investigation into Water-cone Delay Completion Technique Used in Horizontal Wells of Bottom-water Reservoir in Honghuatao Formation

SH10-P21well is a horizontal well of bottom-water reservoir in Honghuatao Formation in Songzi Oilfield.Its perforation interval is only 20meters deep vertically from oil-water interface.To delay bottom water coning and extend water-free oil production period,the completion technique consisting of variable density perforation,equal acidification as well as pressure-oil control of central oilpipe.It starts a new well completion model and sheds a light on future exploitation of bottom-water reservoir.