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Title : A Confusing Well; Perhaps A Reader Has Insight -- August 19, 2017
link : A Confusing Well; Perhaps A Reader Has Insight -- August 19, 2017

A Confusing Well; Perhaps A Reader Has Insight -- August 19, 2017

I'm going to post this for a few minutes, so I can capture the link, and then put it in draft status. I haven't had a chance to proofread this note, and it needs to be checked before I leave it up. 

Disclaimer: in a long note like this there will be factual and typographical errors. I may be seeing things that don't exist. If this is important to you, go to the source.

Look at this post. I am still unable to explain the jump in production in 9/16 of #25961.

Note that all three wells on this 3-well pad were taken off-line 8/16, and then brought back on line in the next month or so. Generally, when one sees that, it means that a neighboring well was fracked.

In this case, when I originally looked at these three wells, I could find no evidence of a neighboring well being fracked.

Today, I took another look.

It turns out a neighboring well was fracked 8/16, the very month that these three wells were taken off-line.

But it still doesn't make sense.

All three wells showed a bump in production, though the Three Forks wells showed a minimum jump in production whereas the middle Bakken well showed a hug jump in production (from 5,000 bbls/month to 14,000 bbls / month). The jump in production did not last particularly long, but it's hard to believe the jump in production from 6,000 bbl/s month to 14,000 bbls/month was due to "recharging" when the well was off-line for less than a month.

I found the well that was fracked in 8/16 that was probably the reason for BR taking these wells off-line:

• 31310, 1,179, Hess, AN-Brenna-LW-153-94-3130H-1, Antelope, Sanish pool (Three Forks), t9/16; cum 176K 6/17; a "small" frack, only 3.1 million gallons of water; 13% sand by weight;

The graphic:

Again, there are many, many problems with this:

• distance between horizontals;
• different formations;
• closer horizontals, targeting same formations, jump in production much less than #25961

I still feel uncomfortable with this one but another good example of the peculiarities of the Bakken. 

http://ift.tt/2dZyQXu

Thus Article A Confusing Well; Perhaps A Reader Has Insight -- August 19, 2017

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