How many SPM when perforating? 1

[cmlpetro]

When completing a gas formation (clean sand) what should be considered when choosing how many shots per meter to perforate, (eg 17spm vs 20spm)?

Thanks

 

[cmlpetro]

I will answer my own question since I found some good analysis of penetration depth/density from some SPE papers.

For my project if I was perforating at 20spm the biggest charge I could use is 23gram. If I perf'd at 17spm I could use a 25gram charge which gave me deeper penetration. So basically it came down to penetration vs density.

Unless I am perforating thin zones I have have been using the bigger charges @ 17spm for all my latest completions.

 

[moemantha]

Is there any relationship between shot density and spm to any reservoir characterstics (i.e permeability) that determine what to use and when?

 

[cmlpetro]

Here are three of the SPE papers that I looked at. Mostly they talk about using a larger charge to penetrate past the near wellbore damaged zone. However there is a bit of discussion about reservoir properties.

12765
29274
83697

 

[DrillerNic]

There's a Schlumberger software called PURE (I think) that lets you play around with shot density, phasing, charge size and so on (using their charges, obviously) that is pretty useful, and is (or was) available for free. Talk to the nearest SLB salesman!

 

[DrillerNic]

OOOPS! Th SLB software is called SPAN....

 

[cmlpetro]

Does anyone know where SPAN can be downloaded or do you have a copy that you can send me?

Thought I would ask before I call the SLB rep, Im not interested in having them start bugging me to purchase their charges.

 

[DrillerNic]

I think you can get on their website.

 

[cmlpetro]

Can't find it for download on their website. I sent them an email asking about it.