Method to improve matrix acidizing in carbonates

Details Method to improve matrix acidizing in carbonates Method to improve matrix acidizing in carbonates

E - Fixed Constructions

21

B

166/22

E21B 33/138 (2006.01) C09K 8/72 (2006.01) E21B 43/263 (2006.01) E21B 43/27 (2006.01)

Patent

CA 1291943

F-4260 Abstract A process for improved acidizing in carbonate formations, where controlled pulse fracturing (CPF) is utilized in combination with a retarded acid. The retarded acid comprises hydrochloric, formic, acetic acid or mixtures thereof which is placed in a wellbore adjacent the area to be treated. Said acid can contain retarders and corrosion inhibitors sufficient to make said acid stable in the wellbore. At least one CPF device is placed in said acid near the interval to be treated. Upon detonation of said device, acid is forced into the desired interval, thereby enhancing the acidizing treatment.

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