TPPB_Tanzania
Member
- May 6, 2026
- 15
- 19
Understanding the Oil & Gas Industry Flow ⛽
The oil and gas industry is generally divided into three major segments: Upstream, Midstream, and Downstream. Each segment plays a critical role in delivering energy safely and efficiently from underground reservoirs to end users.
1. Upstream (Exploration & Production)
This segment focuses on discovering, developing, and producing crude oil and natural gas.
Main activities
Example companies
2. Midstream (Transportation, Processing & Storage)
This segment is responsible for gathering, processing, storing, and transporting crude oil and natural gas to refineries, LNG terminals, and distribution networks.
Main activities
Example companies
3. Downstream (Refining, Petrochemicals & Marketing)
This segment converts crude oil and natural gas into valuable products and delivers them to industries and consumers.
Main activities
Example companies
Oil & Gas Value Chain – A Simple Overview
1. Exploration– Geologists and geophysicists identify potential hydrocarbon reservoirs using geological, geophysical, and seismic surveys.
2. Drilling – Wells are drilled to evaluate and produce oil and natural gas.
3. Production – Crude oil and natural gas are brought to the surface from underground reservoirs.
4. Separation & Processing – Oil, gas, and produced water are separated, and hydrocarbons undergo initial treatment before transportation.
5. Transportation & Storage – Hydrocarbons are transported via pipelines, tankers, LNG/LPG carriers, rail, or trucks and stored in terminals when necessary.
6. Refining & Petrochemicals – Crude oil is refined into products such as petrol (gasoline), diesel, jet fuel, LPG, lubricants, and fuel oil, while natural gas and refinery feedstocks are used to manufacture petrochemicals.
7. Marketing & Distribution – Finished products are supplied to fuel stations, industries, power plants, commercial users, and households.
Understanding this value chain helps explain how energy moves from underground reservoirs to the products we rely on every day.
The oil and gas industry is generally divided into three major segments: Upstream, Midstream, and Downstream. Each segment plays a critical role in delivering energy safely and efficiently from underground reservoirs to end users.
1. Upstream (Exploration & Production)
This segment focuses on discovering, developing, and producing crude oil and natural gas.
Main activities
- Geological, geophysical & seismic surveys
- Exploration, appraisal & development drilling
- Well completion and production
- Oil, gas & water separation
- Initial processing and field treatment
Example companies
- ExxonMobil
- SLB (Schlumberger)
- ONGC
2. Midstream (Transportation, Processing & Storage)
This segment is responsible for gathering, processing, storing, and transporting crude oil and natural gas to refineries, LNG terminals, and distribution networks.
Main activities
- Gathering systems
- Gas processing & NGL recovery
- Storage terminals
- Pipelines
- Oil tankers, LNG/LPG carriers & trucks
- LNG liquefaction and regasification
Example companies
- GAIL
- Adani Total Gas
- Petronet LNG
3. Downstream (Refining, Petrochemicals & Marketing)
This segment converts crude oil and natural gas into valuable products and delivers them to industries and consumers.
Main activities
- Crude oil refining
- Petrochemical manufacturing
- Fuel marketing & distribution
- Retail fuel stations
- Industrial and domestic energy supply
Example companies
- Indian Oil Corporation
- Reliance Industries
- Saudi Aramco
Oil & Gas Value Chain – A Simple Overview
1. Exploration– Geologists and geophysicists identify potential hydrocarbon reservoirs using geological, geophysical, and seismic surveys.
2. Drilling – Wells are drilled to evaluate and produce oil and natural gas.
3. Production – Crude oil and natural gas are brought to the surface from underground reservoirs.
4. Separation & Processing – Oil, gas, and produced water are separated, and hydrocarbons undergo initial treatment before transportation.
5. Transportation & Storage – Hydrocarbons are transported via pipelines, tankers, LNG/LPG carriers, rail, or trucks and stored in terminals when necessary.
6. Refining & Petrochemicals – Crude oil is refined into products such as petrol (gasoline), diesel, jet fuel, LPG, lubricants, and fuel oil, while natural gas and refinery feedstocks are used to manufacture petrochemicals.
7. Marketing & Distribution – Finished products are supplied to fuel stations, industries, power plants, commercial users, and households.
Understanding this value chain helps explain how energy moves from underground reservoirs to the products we rely on every day.
