Venezuelan extra-heavy crude to diesel, asphalt and aluminium anodes

Venezuela · Orinoco Belt 持有方 PDVSA and its joint ventures (国有生产商)

Getting it out of the sand

The crude is too viscous to flow to a well on its own. It is produced cold with progressive-cavity pumps in horizontal wells, or moved by injecting steam to heat it until it will run.

为何选择此地: You cannot move an oilfield. Everything else in this journey is a consequence of where the Orinoco Belt happens to be.

Venezuela · Field gathering stations 持有方 PDVSA (国有生产商)

Thinning it enough to move

Naphtha or a lighter crude is blended in as a diluent, roughly one barrel in four, to bring the viscosity down far enough to pump. The result is a blend such as Merey, around 16° API.

其余部分的去向: Nothing is lost here — the volume goes UP, because a quarter of what now moves through the pipe is diluent that will have to be recovered later.

为何选择此地: Dilution has to happen at the field. Without it there is no way to get the crude to a port at all.

Venezuela · José industrial complex, Anzoátegui 持有方 PDVSA joint-venture upgraders (国有生产商)

Upgrading, or not

Some of the blend goes through an upgrader on the coast, which cokes and hydrotreats it into a synthetic crude of about 26–32° API that any refinery can take. The rest is exported as blended heavy crude and stays somebody else's problem.

其余部分的去向: Upgrading at home captures the value of conversion in Venezuela. Exporting the blend hands that value to whoever owns the coker abroad. This is the single biggest commercial decision in the whole journey.

为何选择此地: Upgrading next to the field avoids shipping diluent back and forth, but it needs enormous, reliable capital investment — which is why the capacity that exists has often run far below its design rate.

Venezuela · José and Amuay terminals 持有方 Shipowners and traders (贸易商)

Onto a tanker

Loaded onto a Very Large Crude Carrier, often via a smaller shuttle tanker and a ship-to-ship transfer offshore. Custody passes from the producer to a trader here, and frequently changes hands again at sea.

为何选择此地: A cargo has to leave from the coast it was produced on. Where it goes next is a commercial decision, not a physical one.

United States · US Gulf Coast (or Shandong, or Jamnagar) 持有方 Refiner (精炼商)

A refinery with a coker

Distillation takes off the light ends. What is left — most of the barrel — goes into a delayed coker, which heats the residue until it cracks into lighter liquids and solid carbon. Hydrotreaters then strip the sulfur out.

其余部分的去向: The diluent is recovered and sent back. Sulfur comes out as elemental sulfur — feedstock for sulfuric acid, which is used to leach other metals elsewhere in this atlas.

为何选择此地: Because the coker is here. Gulf Coast refineries were built to run heavy sour crude and are among the deepest-conversion refineries in the world; a simple refinery in Europe physically cannot process this barrel.

United States · Refinery gate 持有方 Fuel marketers and industrial buyers (制造商)

What comes out the other end

Diesel, jet fuel, petrol, asphalt for roads — and roughly 40 tonnes of petroleum coke from the coker.

为何选择此地: Heavy sour crude yields proportionally more asphalt and coke than light crude does. The barrel's chemistry decides the product slate, not the refiner's preference.

United Arab Emirates · Calciner, then a smelter 持有方 Anode and aluminium producers (制造商)

The coke becomes aluminium

The petroleum coke is calcined and formed into carbon anodes. An aluminium smelter consumes roughly half a tonne of anode carbon for every tonne of metal it makes, burning it away in the process.

其余部分的去向: This is the join most people never see: a barrel of Venezuelan tar ends up as the consumable carbon inside an aluminium smelter on another continent.

为何选择此地: Smelters sit where electricity is cheap, which is rarely where the oil was. The carbon travels to the power, not the other way round.