Method of treating bottom-hole formation zone

Abstract

The invention relates to the methods of treating a bottom-hole formation zone to increase in well productivity and rocks permeability. According to this method a pulse generator should be tripped in a well and the formation pulse treatment should be conducted by generating negative pressure pulses of amplitude higher than the tensile formation strength. The method provides the high fissuring rate by breaking formation fluid-bearing permeable rocks around a wellbore.

1 . A method of treating a bottom-hole formation zone, the method comprising the steps of:
 tripping a pulse generator in a well;   pressurizing a bottom-hole zone higher than the pore pressure or the principle maximum stress in a far-field zone of the formation;   generating at least one negative pressure pulse with magnitude higher than ultimate tensile formation strength and duration less than a character time of diffusion of a fluid in a reservoir.   
     
     
         2 . The method of  claim 1  wherein the at least one negative pressure pulse is applied in a process of hydraulic fracturing during a fracture propagation. 
     
     
         3 . The method of  claim 1  wherein the at least one negative pressure pulse has magnitude of 5 MPa. 
     
     
         4 . The method of  claim 1  wherein a duration of the at least one negative pressure pulse is 0.01 s.