petroleum

petroleum
Name	Petroleum
Caption	Crude oil extraction and transport
Type	Fossil fuel
Origin	Organic matter diagenesis and catagenesis
Main uses	Fuel production, feedstock for chemicals
Discoverer	Ancient use; modern industry origins in 19th century
First major field	Baku oil fields; Titusville well (1859)

petroleum Petroleum is a naturally occurring complex mixture of hydrocarbons and other organic compounds that exists in porous rock formations and liquid reservoirs beneath the Earth's surface. Historically central to industrialization, transportation, and modern Shell, ExxonMobil, Chevron-era multinational energy systems, it underpins global fuel markets and large segments of the stock market and OECD energy policy. Its production, trade, and refining have shaped geopolitics involving regions such as Persian Gulf, Caspian Sea, and Gulf of Mexico.

Introduction

Petroleum comprises hydrocarbons ranging from light gases to heavy tars that, after extraction, are processed by companies like BP and TotalEnergies into fuels, lubricants, and feedstocks for the BASF and Dow petrochemical industries; it is traded on commodity exchanges such as the New York Mercantile Exchange and influences indices like the S&P 500. Major producing countries include Saudi Arabia, Russia, United States, Iraq, and Canada, each hosting fields, pipelines, and ports tied to infrastructure projects like the Baku–Tbilisi–Ceyhan pipeline and strategic organizations such as OPEC.

Formation and Geology

Petroleum originates from the burial, thermal maturation, and migration of organic-rich sediments deposited in depositional environments like the Black Sea, Gulf of Mexico basins, and North Sea. Kerogen in source rocks undergoes catagenesis under heat and pressure to generate liquid and gaseous hydrocarbons that accumulate in traps formed by structures including anticlines, faults, and stratigraphic pinch-outs, as studied in provinces like the Permian Basin and Orinoco Belt. Exploration relies on seismic surveys, well logs, and geological models developed at institutions such as the United States Geological Survey and universities including Imperial College London and Massachusetts Institute of Technology.

Exploration and Extraction

Exploration uses seismic contractors, drilling rigs, and service firms exemplified by Schlumberger and Halliburton to locate reservoirs, appraise reserves, and drill wells onshore in regions like Texas and offshore on continental shelves near Brazil and Norway. Technologies include directional drilling, hydraulic fracturing developed in the Barnett Shale, and enhanced oil recovery methods such as waterflooding and CO2 injection studied in projects associated with Saudi Aramco and National Iranian Oil Company. Offshore production employs platforms and FPSOs tied to maritime regulations influenced by incidents like the Deepwater Horizon oil spill.

Refining and Petrochemical Processing

Refineries operated by firms such as Valero Energy and Sinopec convert crude into distillates through fractional distillation, catalytic cracking, hydrocracking, and reforming units; these supply feedstocks to chemical producers like LyondellBasell and SABIC. Petrochemical plants produce ethylene, propylene, benzene, and other intermediates used by manufacturers in United States, China, and Germany for polymers, solvents, and elastomers. Industrial standards, safety practices, and process controls are influenced by agencies like the Occupational Safety and Health Administration and international bodies including the International Organization for Standardization.

Uses and Products

Refined petroleum yields motor gasoline, diesel, jet fuel, heating oil, and marine bunker fuels that power vehicles, aircraft, and shipping associated with companies such as Boeing and Maersk. Non-fuel products include plastics, synthetic fibers, fertilizers, and pharmaceuticals produced by corporations like Pfizer and Unilever that depend on petrochemical feedstocks. Energy-intensive sectors—transport, petrochemicals, and industrial manufacturing in economies like India and Japan—rely heavily on stable crude supply and price signals from benchmarks such as Brent Crude and West Texas Intermediate.

Environmental and Health Impacts

Extraction, transport, and refining can cause spills, air and water pollution, and greenhouse gas emissions contributing to climate change discussed in reports by the Intergovernmental Panel on Climate Change. High-profile disasters—Exxon Valdez oil spill, Deepwater Horizon oil spill—have led to regulatory reforms and litigation involving governments and corporations. Combustion of petroleum fuels emits pollutants monitored by agencies such as the Environmental Protection Agency and has public health implications studied by institutions like the World Health Organization.

Economics and Energy Policy

Petroleum markets are subject to supply shocks, cartel actions by OPEC and political events in producer states like Venezuela, Libya, and Iran, which affect prices and trade balances monitored by the International Energy Agency and World Bank. Decarbonization policies, renewable energy investments promoted by the European Commission and national plans in China and United States are reshaping demand trajectories and corporate strategies among legacy oil majors. Fiscal regimes, licensing, and national oil companies such as National Oil Corporation (Libya) and Petrobras interact with international investors and financial markets to allocate capital for exploration, production, and low-carbon transitions.

Category:Fossil fuels