What Shell refineries do and where they are located

Shell operates crude oil refineries that turn raw petroleum into gasoline, diesel, jet fuel, and other products used in transportation and industry. The company runs refineries in multiple countries, with significant facilities in the United States, Europe, and Asia. In the U.S., Shell owns and operates refineries in Louisiana, Texas, and California — these are among the largest in their regions by processing capacity.

A refinery is a physical industrial site where crude oil enters through pipelines or tanker trucks, moves through a series of heated vessels and separation towers, and exits as finished fuels and chemical feedstocks. Shell's refineries range from smaller facilities processing 100,000 barrels per day to larger complexes handling 400,000 barrels or more. The size and age of each refinery determines what products it can make and how efficiently it runs.

Shell refineries also produce materials that feed into chemical manufacturing — the category you came from. Refinery output like naphtha and gas oil become raw material for plastics, fertilizers, solvents, and other chemicals made at separate plants downstream.

Key Takeaways

  • Shell operates refineries in Louisiana, Texas, California, and multiple countries overseas, each with different processing capacities and product mixes.
  • Refineries heat and separate crude oil into transportation fuels (gasoline, diesel, jet fuel) and chemical feedstocks that move to chemical plants.
  • Refinery size and equipment determine processing speed and which products can be made — a 100,000-barrel facility operates differently than a 400,000-barrel one.
  • Shell refineries employ hundreds to thousands of workers per site and operate continuously, 24 hours a day, 365 days a year.
  • Environmental permits, safety regulations, and maintenance schedules affect when refineries run at full capacity or reduce output.

The refining process: crude oil to finished fuel

Crude oil arrives at a Shell refinery through pipeline or by ship and tanker truck. The oil is heated to approximately 350 to 400 degrees Celsius and fed into a fractionating column — a tall tower where different molecules separate based on weight and boiling point. Lighter molecules (gasoline range) rise to the top; heavier ones (fuel oil, bitumen) sink to the bottom. This primary separation is called atmospheric distillation.

The heavier fractions that remain after atmospheric distillation move to a second tower called a vacuum distillation unit, which operates at lower pressure to separate additional fuel-range material without breaking down the molecules. The residue from this step can be processed further into lubricating oils or bitumen for road paving, or sent to a coker — a unit that heats the heaviest material to break it into lighter, more valuable products.

Gasoline and diesel produced so far contain molecules that burn unevenly in engines. Refineries use catalytic cracking and hydroprocessing units to rearrange and clean these molecules. Catalytic crackers break heavy molecules into lighter, more valuable ones; hydroprocessing units add hydrogen to remove sulfur and nitrogen impurities. These steps improve fuel quality and meet environmental standards for emissions.

The final step is blending. Shell refineries mix streams of different octane gasoline, diesel with different cetane ratings, and additives to create products that meet fuel specifications. Finished fuel moves into storage tanks and then into pipelines, rail cars, or tanker trucks for distribution to gas stations and industrial customers.

Major Shell refinery locations in the United States

Shell's largest U.S. refinery is located in Norco, Louisiana, on the Mississippi River between New Orleans and Baton Rouge. This facility processes approximately 240,000 barrels of crude oil per day and produces gasoline, diesel, jet fuel, and chemical feedstocks including benzene and toluene. The Norco refinery also includes a chemical plant on the same site that converts refinery output into plastics and other products.

Shell operates a second major refinery in Deer Park, Texas, near Houston. This facility processes roughly 340,000 barrels per day and is one of the largest in the United States by capacity. Deer Park produces gasoline, diesel, jet fuel, and lubricating oils, and also feeds a connected chemical complex.

Shell's Puget Sound refinery near Anacortes, Washington, processes approximately 145,000 barrels per day. This facility supplies fuel to the Pacific Northwest and also produces chemical feedstocks. Shell also owns a stake in the Motiva refinery in Port Arthur, Texas, which is one of the largest in the country, though it is operated as a joint venture with Saudi Aramco and Total.

Each of these refineries operates under permits issued by state environmental agencies and the U.S. Environmental Protection Agency. Permits specify allowable emissions, wastewater discharge limits, and operating conditions. Refineries must also comply with the Occupational Safety and Health Administration (OSHA) standards for worker safety and the Clean Air Act and Clean Water Act for environmental protection.

Employment and workforce at Shell refineries

A typical Shell refinery employs 500 to 1,500 workers depending on size and complexity. Jobs include operators who monitor control rooms and equipment, technicians who maintain machinery, engineers who design and improve processes, laboratory analysts who test product quality, and administrative and safety staff. Many refinery positions require a high school diploma or equivalent plus on-the-job training; some require technical certifications or degrees in chemistry, mechanical engineering, or related fields.

Refinery work is continuous — facilities run 24 hours a day, 365 days a year. Operators work rotating shifts (typically 12-hour shifts on a schedule of days on, days off). Maintenance and turnarounds (planned shutdowns for inspection and repair) occur on a schedule, often every 3 to 5 years, and require additional temporary workers and contractors.

Wages at Shell refineries are generally higher than average manufacturing wages in their regions. The company also offers benefits including health insurance, retirement plans, and tuition information. Union representation varies by facility — some Shell refineries are unionized under the United Steelworkers or other unions, while others operate as non-union sites.

Environmental and safety considerations

Refineries are regulated industrial facilities subject to multiple environmental and safety frameworks. The Clean Air Act limits emissions of sulfur dioxide, nitrogen oxides, particulate matter, and volatile organic compounds. The Clean Water Act regulates wastewater discharge into rivers and coastal waters. The Resource Conservation and Recovery Act (RCRA) governs hazardous waste handling and disposal. Shell refineries must obtain and maintain permits under each of these laws, and violations can result in fines, operational restrictions, or both.

Safety is managed through OSHA regulations and industry standards. Refineries maintain process safety management programs that identify hazards, establish operating procedures, train workers, and conduct regular inspections and drills. Major incidents — fires, explosions, or large chemical releases — are rare at modern refineries but can occur if equipment fails or procedures are not followed. Shell refineries report safety metrics publicly and to regulators.

Planned maintenance and turnarounds are scheduled to inspect equipment for corrosion, cracks, and wear before failures occur. During a turnaround, sections of the refinery shut down for weeks or months, and workers inspect and replace equipment. These events are costly but necessary to maintain safe, reliable operation.

Refinery output and product distribution

Shell refineries produce gasoline, diesel, jet fuel, heating oil, lubricating oils, bitumen, and chemical feedstocks. The mix of products depends on the refinery's equipment and the crude oil it processes. A refinery with a coker and catalytic cracker can convert more crude into gasoline and diesel; one without these units produces more heavy fuel oil and bitumen.

Finished products leave the refinery through pipelines (the fastest and cheapest route for large volumes), rail cars, tanker trucks, or barges. Gasoline and diesel typically move through pipelines to distribution terminals, where they are loaded into smaller trucks for delivery to gas stations. Jet fuel moves through dedicated pipelines to airports or is transported by truck. Chemical feedstocks are piped directly to connected chemical plants or transported by rail or truck to customers elsewhere.

Shell refineries also sell or trade crude oil and intermediate products with other refineries and traders. A refinery might buy additional crude from a supplier, or sell excess output to another refinery if that facility can process it more efficiently or profitably.

How refinery capacity and maintenance affect fuel supply

Refinery capacity — the maximum amount of crude oil a facility can process per day — is fixed by its equipment size. If all U.S. refineries run at full capacity, they can process approximately 17 to 18 million barrels of crude per day. Actual processing is often lower because refineries shut down sections for maintenance, reduce output during low demand, or operate below capacity due to equipment problems.

Planned turnarounds typically reduce a refinery's output by 20 to 50 percent for several weeks. If multiple large refineries schedule turnarounds at the same time, overall U.S. refining capacity drops, which can tighten fuel supply and raise prices. Unplanned outages — caused by equipment failure, weather, or safety incidents — have the same effect but are harder to predict.

Shell and other refiners balance maintenance schedules, crude oil purchases, and product demand to maximize profitability. During high-demand seasons (summer for gasoline, winter for heating oil), refineries run at higher rates and defer non-urgent maintenance. During low-demand periods, they may shut down units for inspection and repair.

Frequently Asked Questions

How much crude oil does a Shell refinery process in a day?

Shell's U.S. refineries range from approximately 145,000 barrels per day (Puget Sound) to 340,000 barrels per day (Deer Park). One barrel equals 42 gallons. A 240,000-barrel-per-day refinery produces roughly 10 million gallons of finished fuel daily, though not all of it is gasoline — the mix includes diesel, jet fuel, and other products.

What happens to crude oil that cannot be turned into fuel?

The heaviest fractions from crude oil are processed into bitumen (used for road paving), lubricating oils, or fuel oil for industrial heating. Some material is sent to a coker, which breaks it into lighter, more valuable products. Very small amounts of residue are disposed of as waste or used as fuel to power the refinery itself.

Do Shell refineries produce chemicals directly, or just feedstocks?

Shell refineries produce feedstocks — intermediate materials like naphtha, benzene, and toluene — that are sold to chemical plants (some owned by Shell, some by other companies) for conversion into plastics, fertilizers, and other chemicals. Some Shell refinery sites have integrated chemical plants on the same property, but the refinery and chemical plant are separate operations with different equipment and processes.

How often do refineries shut down for maintenance?

Most refineries schedule a major turnaround every 3 to 5 years, lasting 4 to 8 weeks. Smaller maintenance activities occur more frequently — some units may shut down annually for inspection. The exact schedule depends on equipment age, operating conditions, and regulatory requirements.

Can a refinery change what products it makes?

A refinery can adjust the mix of products within limits set by its equipment. For example, a facility with a coker can increase gasoline production by processing more heavy crude through the coker. However, major changes — like adding the ability to process heavier crude or produce entirely new products — require building new equipment, which takes years and costs billions of dollars.