Two things stand out in my memory:
Even though the refinery was in full operation, we saw no other people as we walked and drove around the facility. The only staff we saw were in the control room, and they didn’t seem very busy.
The other was the almost complete lack of odors. That particular refinery is close to an upscale residential area, and the company had to be careful to keep sulfurous and other gases from escaping in order to avoid complaints and possibly fines. Some of the documentation I was translating then was about their system for detecting and preventing odor releases. As I recall, they had people walk around the perimeter and local neighborhoods regularly, just sniffing for smells from the plant. On the day we were there, I noticed petroleum odors only when we were close to one of the refining towers; otherwise, the only smell was from the nearby Tokyo Bay.
https://news.ycombinator.com/item?id=43761572
Which leads to "Planet Money Buys Oil"
https://www.npr.org/sections/money/2016/08/26/491342091/plan...
And the manual: https://archive.org/details/sim-refinery-tour-book_202006/mo...
EDIT: oh and it comes from Akkadian! how many Akkadian words do you know?
Do they still just burn off that gas?
It would be helpful to also have a chart that shows how much gasoline or diesel as a percentage of each barrel is produced. It would be a bit variable, since not all crude oil is the same, but I think it would be close for most of it.
Some people think when diesel and regular gas prices diverge, that they should just be able to produce one at the expense of the other; but the distillation process shows that they are fundamentally different.
1. The light and heavy distinction is covered by a measure called API gravity [1]. The higher the API gravity, the lighter the crude;
2. Refiners mix different crude types depending on what kind of refined products they want to produce;
3. Heavy crude tends to be less valuable although it's essential for some applications. Lighter crude produces generally more valuable products like gasoline, diesel and avgas. But heavy crude goes into construction (eg roads) and fuel for ships (ie bunkers));
4. Most refineries in the US are very old and are very polluting. They don't need to be this way. A new refiner would produce vastly less pollution but they're almost impossible to get permission to build now. One exception is the Southern Rock refinery currently being built in Oklahoma [2], which will be powered by largely renewable energy and produce a lot less emissions than an equivalent older refinery with the same capacity;
5. There are different blends of gasoline that the US produces. The biggest is so-called summer and winter blends. What's the differene? Additives are added to summer blends (in particular) to increase the boiling point so less of the gasoline is in gas form because that produces more smog;
6. California uses their own blends so in 2021-2022 when CA gas went to $8+, it wasn't just "gouging". It doesn't really work that way. CA requires a particular blend that only CA refineries produce so it's simple supply and demand as no new capacity gets added to CA refineries and demand goes up with population growth.
The reason for the CA blend goes back to the 80s and 90s when smog was a much bigger problem. Better vehicle emissions standards since then as well as improvements in the blends the rest of the country uses have largely made the CA blend obsolete so CA is really paying $1+/gallon more for literally no reason; and
7. California doesn't build pipelines so is entirely dependent on seaborne oil imports (~75%) despite the US being a net energy exporter. Last I checked, ~20% of that foreign oil comes through the Strait (from Iraq, mostly) so, interestingly, CA is more vulnerable to the Strait of Hormuz closure than the rest of the country.
I guess I'll add a disclaimer: I'm very much pro-renewables, particular solar. I think solar is the future. But we currently live in a world that has huge demand for oil and no alternatives for many of those uses (eg diesel, plastics, construction, industrial, avgas) so we should at least be smart about how we go forward.
[1]: https://en.wikipedia.org/wiki/API_gravity
[2]: https://www.oklahoman.com/story/news/2023/05/24/5-6-billion-...
India's Reliance is also investing $300B [0] in a Texas megarefinery [1] in specifically for cleaner and more efficient shale refining.
This is deeply technical and complex but low margins work (semiconductor fabrication falls in the same boat) which saw this industry leave for abroad in the 2000s and 2010s when other states like China and India subsidized their refinery industries to build domestic capacity for a number of petroleum byproducts with industrial applications.
This is the same strategy Japan, South Korea, and Taiwan used in the 1960s-90s as well.
[0] - https://www.bloomberg.com/opinion/articles/2026-03-17/ambani...
[1] - https://www.bloomberg.com/news/articles/2026-03-11/reliance-...
https://en.wikipedia.org/wiki/Fractional_distillation
Fractionating column
Thankfully, the top consumer China, is building nuclear reactors at an unfathomable rate.
Also the fact that that oil is different colors (green, red, etc) and not black is always amusing.
What I often wonder is, as the demand for oil declines, the economies of scale in oil production should, too. If that is the case, will not the price of everything with oil byproduct inputs go up? In other words, will the transition to other energy sources actually be highly inflationary?
