TECHNIQUE OF MECHANICAL WATER PACKING AND PLUGGING IN HTHP RESERVOIRS IN HEKOU OILFIELD

Based on the phenomena of unstable down-hole tools performance and short valid period in mechanical water packing and plugging in deep and low permeable HTHP reservoirs,the hydraulic packer and assorted sealing parts of high temperature-resistant and high pressure-resistant are selected optimally and modified,and the operating technique is simplified.In the 5 field test wells,the success ratio is 100%,and the valid period is above 320d.The result indicates the technique can be used to effectively fulfill the zonal production of such reservoirs.