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               JANUARY 2024  

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A Deeper Dive Into Formation Damage

 A majority of our new customers come to us because of formation damage. They might be trying to reach through some near wellbore damage to communicate with the reservoir, improve deteriorated flow from the producing formation, or complete the well proactively so as to not create additional damage and maximize production. One of the major advantages for sand jet perforating over conventional explosive perforating is the ability to create a large, long perforation tunnel that is clean and does not pack debris into the reservoir.  

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Traditional Explosive Perforation Tunnel Versus Sand Jet Tunnel

The illustration above notes the crushed and compacted areas around an explosive perforation while also showing that the sand jet perforation tunnel increases in diameter with distance from the casing. In contrast, the largest part of the explosive perforation tunnel is the hole in the casing. The secret behind these superior perforation tunnels is the ability to erode a tunnel by washing the formation rock and circulating it back into the formation and then continuing to erode for several minutes. This continued conveyance of energy for cutting sets sand jet perforating apart from its explosive counterpart which can only convey as much energy as it has space to carry the explosives. 


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Sand Jet Stream Perforating a Casing

In reservoir formations with high porosity and average confined compressive strength, sand jet perforating can create large voids in the formation, removing as much as a cubic meter of formation material and circulating it out to the surface. Large pieces of source rock have been captured in the return fluid as evidenced by the picture below of a 1" diameter piece of coal that was recovered from a well in India.


Come Join Us to Learn More About Formation Damage

 The SPE International Conference and Exhibition on Formation Damage Control will be held at the Doubletree by Hilton Lafayette in Lafayette, Louisiana on February 21st through the 23rd. This is the 25th biannual conference which is celebrating 50 years this year.

TD Tools has joined with Accu-Line Well Services to author a paper- "Reduction Of Near Wellbore Formation Damage Using Abrasive Jet Perforating" that we will present on Thursday, the 22nd. We will present in Session 08- Formation Damage Issues between 8:30 and 11:30 am in Salon B.


Feel Free to Contact Thomas Dotson at for more information.

Visit the SPE>>Formation Damage Control Website Below

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