dcoyne78 wrote:I am comparing a historical estimate given in the AEO 2021, that is a part of history, with historical assessments of the USGS.
Yes. And I've been hinting that there are reasons why they are different.
dcoyne78 wrote:Does that seem reasonable? That is 10 Gb more than the USGS F5 estimate, I don't buy it.
Two different estimates, of two different things, isn't about "buying" either one. It is only about which one fits better into your scheme of thinking about how to project into the future.
dcoyne78 wrote:Can you remind of us of question one and question two and how the questions are answered using publicly available data?
Question #1 is "why are peak oil claims always wrong on the low side" and Question #2 is "how can you build a system that stops making that mistake".
You've already figured out Question #1 correctly, and I certainly have never claimed that you or anyone else lacking a full data suite can answer question #2. The Texas BEG folks come closest at answering Question #2, at the level of particular formations, and mostly in their state. They don't operate with just publicly available data any more than I do.
dcoyne78 wrote:Note that I do not have all the answers, but it is not clear that you do either.
Good. If it isn't clear to you, then most others are probably clueless. Regardless, look me up if you are ever in Denver. I'll take you out to lunch, and convince you otherwise.
dcoyne78 wrote:It seems that DOE researchers adjust resource estimates so that supply matches demand at the price scenarios they have devised. That seems an exercise in wishful thinking.

Sort of like peak oilers?
dcoyne78 wrote:I will stick with USGS estimates, I doubt they will come up with mean estimates for other tight oil plays (besides Bakken/Three Forks, Eagle Ford/Austin Chalk and Permian basin) of 33 Gb. My estimate is about 16 Gb for the mean TRR of those other tight oil plays, with ERR of 13.8 Gb.
You are free to stick with whatever estimates you wish. Let me offer up just one more piece of information. That graphic I sent you. It has an uncertainty range on it, higher uncertainty to the left, lesser to the right. Pick the expertise involved of what type, and how it changes, from left to right, and tell me, as development progresses, what matters more? An estimate based on which expertise, delivers a more fundamentally grounded answer? At which stage of development? And how do you pick where that is, with existing information? I was not kidding when I told you that the concepts on that graphic are themselves part of the answer to Question #2. With or without the full data suite. How can anyone be expected to answer Question #2 without the transitioning through specialties that graphic clearly shows?
You, representing the right hand side of that graphic, don't know what a better estimate might look like coming from the specialties involved on the left. Those experts on the left, don't have a clue how to think about the right hand side. And you, being data constrained, haven't been able to advance any farther than just X wells to drill, at Y size, deducted from someone else's estimate, scheduled through time using a random function that has nothing to do with oil and gas development. It didn't work when WebHubble used it to predict peak oil more than a decade ago but hey! Let's use it again anyway! You've heard the axiom before, when all you have is a hammer, everything looks like a nail? You can do better! I have faith!
