Abstract: Main problems and causes for the self-contained sandstone pool inⅥproduction section at the later recovery stage of extremely high water cut are analyzed.In order to tap the latent production power of sandstone pools at the stage,it is defined that the main reservoirs of extremely high water cut are still the primary targets to adjust for recovery, and the other reservoirs have the potential to further enhance the recovery effect.A composite adjustment countermeasure to enhance the residual reserves in the main reservoir of extremely high water cut is suggested.After the application of results in the field,a relatively good effect is obtained, which offers a reference to the same kind of pool for recovering the latent power.