Pops - I think I did understand you: you feel the recent LTO production is much grander then it ever has been. Which it isn't. The I billion bbls produced by the Spraberry as of 1994 is just one example of the huge volume of LTO produced over the half century before the recent surge. IOW the chart you just posted is completely misleading: compared to the recent surge a much larger area under the curve starting in the 30's should also be colored green and labeled "LTO". Your curve specifically implies LTO production is a new phenomenon. In reality a significant portion of your blue "Remainder" is actually LTO. Just as a significant portion of your green LTO is from new wells drilled in many LTO fields originally discovered and began producing 50+ years ago.
LTO is not a new reserve category that was just discovered 10 years ago. But you don't have to take my word for it. Here's what a USGS 2012 study reported about 18 of the largest PB low permeability oil (your "LTO" as folks like to call it today) fields that were discovered between 1929 and 1950.
https://www.google.com/url?sa=t&source= ... yc7SvbIRVw
And being typical LTO reservoirs the survey estimated only 10% to 20% recovery of the original oil in place. And thanks to developing EOR methods between 1979 and 2004 (before the recent surge) the survey increased the future recovery by 4.7 BILLION BBLS. That's not the total...just the increase. And from LTO fields that have been producing for 66 to 86 years.
Frac'ng long horizontal wells in the Permian Basin LTO fields is a fairly new phenomenon. But producing a sh*t load of LTO in the Permian Basin ain't. If Mr. H wasn't aware of this fact he needs to check in more often with the boys at the USGS and with the Texas Bureau of Economic Geology. Both have thousands of pages of detailed reports covering the very long hjistory of US LTO production.