Forming perturbed in-line perforation pairs

Abstract

A bottom hole assembly includes a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation; and a perforating tool configured to couple to the downhole conveyance and create at least one pair of perforations. The at least one pair of perforations is arranged along a longitudinal direction of the wellbore such that a first perforation in the at least one pair of perforations is oriented at an azimuthal offset angle relative to a second perforation in the at least one pair of perforations.

1 . A bottom hole assembly, comprising:
 a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation; and   a perforating tool configured to couple to the downhole conveyance and create at least one pair of perforations, the at least one pair of perforations arranged linearly along a longitudinal direction of the wellbore and having a coverage of less than 360 degrees along a circumferential direction of the wellbore, such that a first perforation in each of the at least one pair of perforations is oriented at an azimuthal offset angle relative to a second perforation in a respective pair of the at least one pair of perforations.   
     
     
         2 . The bottom hole assembly of  claim 1 , wherein the azimuthal offset angle ranges between about 0 degree and about 60 degrees. 
     
     
         3 . The bottom hole assembly of  claim 1 , wherein the azimuthal offset angle ranges between about 0 degree and about 20 degrees. 
     
     
         4 . The bottom hole assembly of  claim 1 , wherein the azimuthal offset angle ranges between about 0 degree and about 180 degrees. 
     
     
         5 . The bottom hole assembly of  claim 1 , wherein a separation distance between the first and second perforations along the longitudinal direction of the wellbore is equal to or less than about ⅙ foot. 
     
     
         6 . The bottom hole assembly of  claim 1 , wherein the perforating tool comprises a plurality of shaped charges, and detonating directions of the shaped charges are phased at azimuthal angles smaller than about 60 degrees. 
     
     
         7 . The bottom hole assembly of  claim 1 , wherein the at least one pair of perforations comprises a first pair of perforations, the azimuthal offset angle is a first azimuthal offset angle of the first pair of perforations, and
 the at least one pair of perforations comprises a second pair of perforations, the second pair of perforations arranged along the longitudinal direction of the wellbore such that a first perforation in the second pair of perforations is oriented at a second azimuthal offset angle relative to a second perforation in the second pair of perforations.   
     
     
         8 . The bottom hole assembly of  claim 7 , wherein a spacing distance between the first pair of perforations and the second pair of perforations is equal to or larger than about ⅙ foot. 
     
     
         9 . The bottom hole assembly of  claim 7 , wherein the first azimuthal offset angle of the first pair of perforations is equal in magnitude to the second azimuthal offset angle of the second pair of perforations. 
     
     
         10 . The bottom hole assembly of  claim 1 , wherein the perforating tool comprises a high-pressure coiled tubing jetting tool, a laser tool, or an abrasive jet perforating tool. 
     
     
         11 . A bottom hole assembly, comprising:
 a downhole conveyance that is extendable from a terranean surface, through a wellbore, and to a subterranean formation; and   a perforating tool configured to couple to the downhole conveyance and create a plurality of pairs of perforations, each pair of the plurality of pairs of perforations arranged linearly along a corresponding longitudinal direction of the wellbore, such that a first perforation in each pair of perforations is oriented at a corresponding azimuthal offset angle relative to a second perforation in each pair of perforations, the corresponding azimuthal offset angle ranging between about 0 degree and about 60 degrees, wherein   a separation distance between the first perforation and the second perforation within each of the plurality of pairs of perforations along the longitudinal direction being smaller than a spacing distance between adjacent pairs of the plurality of pairs of perforations along the longitudinal direction.   
     
     
         12 . The bottom hole assembly of  claim 11 , wherein the plurality of pairs of perforations has a same azimuthal offset angle. 
     
     
         13 . The bottom hole assembly of  claim 11 , wherein the azimuthal offset angle ranges between about 0 degree and about 20 degrees. 
     
     
         14 . The bottom hole assembly of  claim 11 , wherein at least two of the pairs of perforations have different azimuthal offset angles. 
     
     
         15 . The bottom hole assembly of  claim 11 , wherein at least two of the pairs of perforations are arranged along different azimuthal planes of the wellbore. 
     
     
         16 . The bottom hole assembly of  claim 15 , wherein the corresponding longitudinal direction of the wellbore comprise a direction parallel to a surface of the Earth. 
     
     
         17 . The bottom hole assembly of  claim 11 , wherein the plurality of pairs of perforations are spaced apart from one another at an unequal distance. 
     
     
         18 . The bottom hole assembly of  claim 11 , wherein a spacing distance between adjacent pairs of perforations is equal to or larger than about ⅙ foot. 
     
     
         19 . The bottom hole assembly of  claim 11 , wherein the perforating tool comprises a high-pressure coiled tubing jetting tool, a laser tool, or an abrasive jet perforating tool. 
     
     
         20 . A method to form perforations, comprising:
 positioning a perforating tool adjacent a subterranean formation within a wellbore; and   operating the perforating tool to form a plurality of perforation clusters in the subterranean formation, at least one of the plurality of perforation clusters arranged linearly along a longitudinal direction of the wellbore and having a coverage of less than 360 degrees along a circumferential direction of the wellbore, at least one of the perforation clusters comprising a pair of perforations arranged along a longitudinal direction of the wellbore, a first perforation in the pair of perforations being oriented at a corresponding azimuthal offset angle relative to a second perforation in each pair of perforations, a spacing distance between adjacent perforation clusters being larger than ⅙ foot.   
     
     
         21 . The method of  claim 20 , wherein the corresponding azimuthal offset angle ranges between 0 degree and 60 degrees. 
     
     
         22 . The method of  claim 20 , wherein the corresponding azimuthal offset angle ranges between 0 degree and 20 degrees. 
     
     
         23 . The method of  claim 20 , wherein the perforating tool comprises a high-pressure coiled tubing jetting tool, a laser tool, or an abrasive jet perforating tool. 
     
     
         24 . The method of  claim 20 , wherein the perforating tool comprises a plurality of shaped charges. 
     
     
         25 . The method of  claim 24 , wherein operating the perforating tool comprises: orienting detonating directions of the shaped charges at an azimuthal phase angle equal in magnitude to the azimuthal offset angle of the pair of perforations of a corresponding one of the perforation clusters. 
     
     
         26 . The method of  claim 25 , wherein the azimuthal phase angle is smaller than 60 degrees. 
     
     
         27 . The method of  claim 20 , wherein a separation distance between the first and second perforations of the pair of perforations along the longitudinal direction of the wellbore is equal to or less than ⅙ foot.