METHOD TO INCREASE RESERVOIR BED PERMEABILITY Russian patent published in 2007 - IPC E21B28/00 E21B43/16 G01V1/40 

FIELD: geophysics, particularly geophysical reservoir recovery methods to be used in wells having rating decreased during well operation.

SUBSTANCE: method involves supplying liquid in well and applying impact wave action thereto with impact wave transmission along liquid waveguide inside well and following wave reflection from deflector and wave return to reservoir. Geoacoustic signals are measured within reservoir interval by means of three orthogonally arranged sensors before action application. Sensitive axis of the first sensor coincides with well axis. Sensitive axes of the second and the third sensors are directed transversely thereto. Sensor signal ratio is calculated and graphs are plotted. If signal ratio of vertical sensor and horizontal sensors is less than 1 and signal ratio of horizontal sensors is not equal to 1 depth intervals having maximal permeability are determined from the graphs and deflector is installed at the same depth. Then impact wave action is carried out.

EFFECT: increased reservoir recovery due to deflector installation within reservoir interval having the greatest permeability.

1 dwg