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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 & insights

Publications: 25 FEBRUARY 2020

Oil and gas joint venture parties not bound by good faith or rationality when discharging operator

Parties to an unincorporated oil and gas joint venture were free to act in their individual best interests in deciding whether to discharge another party from its operator role.  No duty of good faith or rationality applied: (1) Taqa Bratani Ltd; (2) Taqa Bratani LNS Ltd; (3) JX Nippon Exploration and Production (UK) Ltd; and (4) Spirit Energy Resources Ltd v Rockrose UKCS8 LLC [2020] EWHC 58 (Comm).

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News: 06 FEBRUARY 2020

Allen & Overy advised APICORP on two facilities for an aggregate value of USD250m

Allen & Overy advised The Arab Petroleum Investments Corporation (APICORP), a multilateral development financial institution, on two facilities for an aggregate value of USD250m to Sonatrach Petroleum Investment Corporation (SPIC), a subsidiary of Sonatrach S.p.A., the Algerian state-owned national oil company.

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Landscape view of electricity pylons

News: 03 FEBRUARY 2020

Top rankings for A&O’s Projects, Energy, Natural Resources and Infrastructure group

A&O’s global Projects, Energy, Natural Resources and Infrastructure group has finished top of the IJGlobal and Dealogic league tables, making 2019 another highly successful year. 

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Pink and gold confetti

News: 07 JANUARY 2020

A&O rounds off 2019 with stellar performance in global M&A league tables

A&O has marked the end of Q4 2019 with a stellar performance in the M&A league tables; the result of advising on a number of complex, high-value transactions in a wide range of sectors and markets, around our global network in 2019. 

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