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2 min read

Choking Back Wells

Choking Back Wells

We’ve been discussing all things production and how they pertain to the current market. If you haven’t read the first parts yet, here are the links

The Problem…The Whole Problem
The Effect of New Drills

We’re going to sidebar here a little here to do a quick post on choking back wells. In our previous post about the effect of new drills, we used some pretty broad type curves to estimate our production. In this post we dive into what effect choking back production could have on those results.


To keep this post simple, we’re going to compare two operators in the Delaware basin. We’ll be using wells drilled in the past 5 years by Anadarko (now Oxy, but Anadarko drilled these before they were acquired) and EOG. Both operators were considered very successful in the Delaware basin. The economics on both operator’s wells are good. The only difference is strategy. EOG is known for high IPs and maxing out early production. Anadarko’s strategy at the time called for a lower initial production with a flatter decline.

Here’s a link to the search we’ll use –

To highlight the difference in choke management between these two operators, we’ll plot out the choke values per well.

Anadarko wells – note the variance in choke is pretty widespread.
EOG wells – We see the vast majority of wells not being choked at all.

The Production Difference

The difference is also very evident in their average type curve for these wells. I’ll drop in a handful of images to compare. Everyone loves pictures, right?

Monthly oil type curve comparison – all wells.
Monthly oil type curve comparison – P10.
Monthly oil type curve comparison – P90….that’s not pretty…
Monthly oil cumulative curve – all wells again.
Oil type curve in barrels per day – all wells

A quick review lays out a pretty simple comparison. EOG’s average wells produce significantly more in the first 6 months or so. At that point, Anadarko’s average wells jump ahead. It takes about 2 years for the cumulative to meet and then Anadarko widens the gap. At 60 months, the average Anadarko well has produced around 60,000 more barrels than the EOG well (377,000 bbls and 316,000 bbls respectively).

We should note that while these observations seems apparent, there are other factors. Access to capital, time value of money, infrastructure and others. Point being, it’s not black and white.

Our goal here is to understand what the effects of choking are to the bigger picture. Most of these values will be calculated by barrels of oil per day, so we’ll stick with that last chart. Let’s compare the numbers.

EOG’s average well max production is 1153 barrels of oil per day.
During the same month (2) Anadarko’s average well produces 406 barrels of oil per day.
The max month for Anadarko’s average well is month 4 at 506 barrels of oil per day.

We can throw that in a table now and see how they compare.

Month 1 2 3 4 5 6 7 8 9 10 11 12
Anadarko 373 407 487 506 465 438 404 396 378 351 336 325
EOG 1086 1153 792 620 506 426 367 345 301 279 257 231
Difference -714 -746 -306 -113 -40 12 37 51 78 72 80 95
Percent Diff -66% -65% -39% -18% -8% 3% 10% 15% 26% 26% 31% 41%


So the point here is clear. If oil is bad/horrible/a train wreck in the immediate term, you might want to choke today’s production back and maybe make it back, and then some, in the future. The difference in our example is drastic for sure. 58% less production over the first 3 months. It would be a massive stretch to say that we could see these results at any scale. You can’t deny that the data is compelling enough to explore.


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