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The Best Days for the Permian Basin Are Over
Longer laterals, more perforated interval, bigger frac's, different proppant, AI generated, autonomous, on the fly frac changes...it's still all about the rock, the carbonates, the mudstone. And the good stuff is gone.
Below, realized production data from the Texas Railroad Commission. New well productivity is declining, terminal decline rates for legacy production is exponentially increasing, costs are going up, product prices are going down.

For me this chart above is one of the most enlightening I've worked on for several years. It is from Novi and represents Cumulative Oil vs. Time for all Permian Basin tight oil wells drilled since 2010, to July 2025. It is not necessary to normalize lateral lengths in this chart because laterals are categorized by length, right hand column.
There is an implied correlation between lateral lengths and the age, or maturity of the play. In the beginning wells were less than a mile long,…





Hi Mike,
Are you sure those are not normalized? For the average Permian Delaware well in 2015 I get roughly 311 kbo cumulative at 195 months where well reaches about 10 bo/d,. I am using Novi data from https://novilabs.com/blog/permian-update-through-jan-2024-2/
Using the data at this link https://www.eia.gov/todayinenergy/images/2021.10.19/main.svg the average lateral length for Delaware Basin wells in 2015 was around 5000 feet. If we normalize such a well to 10k lateral then EUR would double to about 600 kbo similar to your chart for 5k lateral wells.
I don't have access to the Novi data that normalizes by lateral length, so just trying to make sense of 600 kbo EUR for those older wells.