PRESSURE PULSE PRE-TREATMENT FOR REMEDIAL CEMENTING OF WELLS

摘要

Processes and methods related to remedial cementing of a well including a tubular cement section in between a casing and the wellbore, can include pre-treating a portion of the tubular cement section proximate a perforated zone of the casing by generating hydraulic pressure pulses proximate to the perforated zone to produce a pre-treated tubular cement section; and injecting a cement slurry into an isolated segment of the wellbore such that the cement slurry flows into the pre-treated tubular cement section. The cement slurry injection can seal a micro-annulus defined in between the casing and the tubular cement section. The hydraulic pressure pulses can include shockwaves. Techniques related to remedial cementing using pressure pulse pre-treatment can be implemented in connection with various wells, such as SAGD wells.