Well 24-7X was drilled and capable of 2,000 STB/D. However, production was immediately choked back to 900 STB/D from first production due to a combination of contractual and facility issues. In July of the fourth year...24-7X’s percentage of total production over the last twelve months was closest to: A) 23; B) 23.5; C) 24; D) 24.5.
This is a standard DCA problem (with a few tricks). I'll post the solution later, but feel free to ask any questions/discuss in the meantime. It does take some time to get used to the format and equations in the new SPE Reference.
Can you assume an exponential decline rate to use? I would assume with the limited data in the question, you could find the potential production with 2000 stb/d then find when your curtailed flow would intersect on the time axis then solve from there?
ReplyDeleteGood Q; the key is to read DCA problems very carefully; this one says "started to decline at an observed 4% per month". The key word is "observed" which just assumed exponential.
DeleteOkay, I do not see that anywhere in the problem on the website. I bought and downloaded the kindle book and now see it.
ReplyDeleteForgot to mention, this tricky DCA word game is covered in the Guidebook on the DCA page. I'll have to look this up in the newer edition of the SPE Handbook and see if it's still there.
DeleteAfter getting all the data, I was able to get the correct answer. Thanks!
ReplyDelete