Study For Raising The Cementing Quality Of The Adjustment Well In The Areas With High Permeability And Low Pressure

The Daqing Oil Field has gotten into the phase of the third redensification adjustment well exploitation. The area of the north of the oil field with high permeability and low pressure has been in the late exploitation period with high aquiferous quantity and high output. The aquiferous quantity of the high permeability layers of the old area'basic well web has been more than 95%. The stratum has been submerged heavily. The hole dypass within the layers was washed out for a long time. Its colloid was taken away and the penetration rate increased greatly . After cementing the well under the condition of the time-lapse sound wave and distinguishing density logging,the formation liquid can come into being the corrosive nature to the cement annulus so that it would reduce the limestone intensity and destroy the cementation quality of the second well cementation interface. How to raise the cementing quality of the adjustment well in the areas with high osmosis and low pressure under the condition of the time-lapse sound wave differencing density logging. It has already been an important subject about oil field exploitation.By studying the erosion and damage from the formation liquid to the cement annulus and the annularity space pressure gap and the influence from the drilling fluid performance to the stratum with high permeability and low pressure,it is summarized out a theory about that how the high permeability and low pressure layers affect the cementation quality. Through the method to guarantee high presses and the irrigation can achieve stabilizes and reduces the level the differential pressure; Using the eddy liquid well-washing technology can be possible to clean the wall of a well effectively the empty filter cake; Using the technology of cementing with outer-casing packer may reduce the damage of the annulus and the intrabed differential pressure to the cementation quality of the stratum with high permeability and low pressure; Using the passive self-excitation waterpower pulse vibration well cementation technology and the continual oscillating field producing in the annular cement mortar may improve the well cementation quality. Through the applied research,We have made the pretty good matching technique measures. Combining field-experiment with apply,it shows that the measures can effectively raise the cementing quality of the high permeability and low pressure formation.