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Midstream is the essential segue between the exploration and production (upstream) and refining oil  products and marketing (downstream) and includes pipelines and other transportation (shipping), and storage.


Geopolitics and the need to transport oil and gas over long distances to markets with high demand continues to drive growth in the development of pipelines. These enormously complex and capital intensive 'midstream' projects require a detailed knowledge of the sector as well as an international presence.


Given the global growth in demand for energy and the volatility of the energy markets generally, storage (on–and offshore) is increasing seen as an essential tool to bring enhanced security of supply and stability to energy markets.



Shipping and off-shore finance is an increasing important part of the energy supply chain as companies look to transport oil and gas over long distances to markets with high demand.  An increasing appetite for ultra deep water oil and gas exploration is also fuelling the demand for ships such as FPSOs, drillships and other offshore support vessels
Allen and Overy are pioneers in this market advising a broad range of clients including IOCs, NOCs, independents, governments, funder (equity, debt, ECAs) banks, lessors, lessees, and ship owners on the full range of ship financing techniques, EPIC and chartering arrangements.
The range of vessels on which we have advised is broad including: FPSOs, LNG carriers, drill ships, rigs, wind turbine installation ships, chemical tankers, ship conversions and VLCCs. We provide our clients with the right legal advice and structures, whatever the vessel type, and ensure this is appropriate to the market in which it will operate.

News and insights

News: 26 July 2022

Allen & Overy advises energy group Uniper on EUR 15 billion stabilisation package

Allen & Overy LLP advised the listed energy group Uniper SE (Uniper) on substantial elements of a stabilisation package with a total size of EUR 15 billion, which was agreed between Uniper, the German…

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person climbing ladders

Publications: 04 January 2022

Polish hydrogen strategy

New opportunities for the development of a low carbon hydrogen economy in Poland

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Employee working on a gas utility site

Publications: 16 December 2021

European commission boosts decarbonised gases with new gas package

On December 15, 2021 the European Commission published a proposal for a revised Gas Directive and a revised Gas Regulation.

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Publications: 04 June 2021

Dutch Court orders Shell to reduce CO2 emissions by 45%

On 26 May 2021, the Court of The Hague rendered a landmark decision in proceedings between Milieudefensie (a.o.) and Royal Dutch Shell plc (RDS). Milieudefensie claimed, in short, that RDS must reduce…

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