One rise and the entire chain moves? Let me explain the logic of the oil industry chain clearly today.

Today, let's skip the complex jargon and explain the "oil industry chain + oil price transmission" in plain language.
Why is oil so important?
Oil is like the "blood" of industrial society. After processing in refineries, it mainly produces two major categories:
Refined products: Gasoline, diesel, kerosene – corresponding to cars, trucks, airplanes, construction machinery, agricultural machinery, etc.
Chemical feedstocks: Naphtha, olefins, aromatics, etc., which are further processed into thousands of chemical products like resins, rubber, synthetic fibers. Many things around us – plastics, clothes, tires, cosmetics... – come from here.
You can think of a refinery as a "custom processing plant": based on crude oil characteristics and process selection, it decides whether to produce more fuel or more chemicals.
What does each segment of the oil industry make money from?
Upstream: Exploration and Production (Resource side)
Upstream is about finding and extracting oil. It includes:
● Seismic exploration, geological analysis, reserve assessment
● Drilling/completion, fracturing, cementing, perforation
● Oil and gas gathering and transportation (what comes out of the wellhead is usually a "mixture of oil, gas, water, and impurities," which cannot go directly into long-distance pipelines or onto ships, so it needs to be gathered, preliminarily treated, and purified into qualified oil and gas first)
Key upstream keywords: Resources, production, cost, supply disruptions.
Midstream: Storage, Transportation & Processing (Logistics side)
Midstream is responsible for transporting, storing, and processing oil and gas into transportable/usable forms:
● Long-distance pipeline transportation (crude oil/natural gas across countries/provinces)
● Oil and gas storage (crude oil tanks, underground gas storage)
● LNG receiving terminals (receiving – storage – regasification)
● Oil and gas processing (desulfurization, dehydration, light hydrocarbon recovery)
Key midstream keywords: Channels, transportation capacity, freight rates, storage & transportation capacity.
Downstream: Refining, Sales & Chemicals (Consumption side)
Downstream processes crude oil into refined products and chemicals, and ultimately sells them:
● Refining (crude oil distillation, catalytic cracking, etc.)
● Petrochemicals (ethylene, propylene, aromatics chains)
● Refined product sales (gasoline/diesel/kerosene)
● Natural gas sales (city gas/industrial gas)
Key downstream keywords: Spread (crack spread), capacity cycle, demand.
Why is oil price so sensitive when geopolitical conflicts arise?
Because oil resources are highly concentrated: as of the end of 2024, global proven oil reserves are about 1.77 trillion barrels, with the Middle East accounting for 48.3%, nearly half. Venezuela's reserves are 303.2 billion barrels (17.1%), ranking first globally; Iran's reserves are 208.6 billion barrels, accounting for over 11%, placing its resources among the world's top. The top ten reserve-holding countries collectively control over 80% of reserves. In short: the more concentrated the resources, the more "bottlenecked" the supply side, and the more easily prices are amplified by events.
Why is Iran key? Not just because it "has oil," but because it "chokes the passage"
Iran has a very thick "family fortune": proven reserves of 208.6 billion barrels, third globally. In 2024, its average daily production was 3.26 million barrels, accounting for about 4.5% of global daily output. Its average daily exports in 2024 were 1.566 million barrels, a year-on-year increase of 18.4%. Oil export revenue accounted for 41.6% of Iran's merchandise export value (still a core pillar). More importantly: The Strait of Hormuz is the only maritime passage from the Persian Gulf to the open sea, known as the "throat" of global energy transportation. So, once there is a "blockade risk/transportation disruption" here, the market's first worry is not "whether there is oil," but – can the oil be smoothly transported out?
How does oil price volatility transmit?
Taking January 2026 as an example, affected by conflicts in the Middle East, Russia-Ukraine, Venezuela, etc., supply risks increased:
● Brent average price for the month was $64.7/barrel, closing at $70.7 at month-end
● WTI average price for the month was $60.2/barrel, closing at $65.2 at month-end
If geopolitical conflicts are not considered
Supply side: OPEC+ unexpectedly extended production cuts, about 2 million barrels/day extended to the end of 2026 and paused production increases
Demand side: Global crude oil demand is still growing, with a daily increase of 93–130 million barrels in 2026
Supply-demand pattern: Supply constrained + demand expansion → Tight supply-demand

My own learning point is:
The profitability of refining and chemical enterprises often isn't about "making money when oil prices rise," but about whether the "product spread" widens.
① Upstream looks at "resources & supply": Concentrated reserves + supply disruptions → Greater oil price elasticity
② Midstream looks at "channels & transportation capacity": Whether key straits/pipelines are unobstructed → Risk premium and freight rate volatility
③ Downstream looks at "spread & capacity cycle": Crack spread + expansion/clearance of chains like PX/PTA → Determines the prosperity level

This article is for knowledge sharing only and does not constitute investment advice. Let's learn together and gradually become more professional.$PETROCHINA(00857.HK) $CNOOC(00883.HK) $Us Brent Oil(BNO.US)