Mayer Brown’s Global Energy Practice is a cross-office, cross-practice group of 150+ energy-focused lawyers dedicated to serving the global energy industry. Located in the key business and energy hubs worldwide—including Houston, Singapore, London, Hong Kong, Tokyo, Dubai, Rio de Janeiro, and Paris—our lawyers have an in-depth understanding of the risks and commercial issues unique to the industry in nearly every global jurisdiction, and provide clients full transactional and dispute resolution capabilities. The practice is consistently recognized by leading legal directories such as Chambers and Legal 500, and was named Practice Group of the Year for Energy by Law360, reflecting its position at the forefront of the global energy sector.
Oil & Gas
With one of the world’s most established global energy platforms, Mayer Brown’s Oil & Gas lawyers have been at the center of complex upstream, midstream, and downstream projects across global markets for decades. We bring deep experience advising oil and gas companies, service providers, infrastructure developers, refiners, lenders and investors. Our integrated, cross-practice team delivers practical, commercial solutions that address today’s challenges while positioning businesses for long-term success in an evolving energy landscape.
Mayer Brown is recognized for our leadership on complex, cross-border LNG matters. We counsel clients on the full LNG value chain, including project development, financing, shipping, long-term supply arrangements, acquisitions and disputes. Our global platform enables seamless support for owners, charterers, lenders, developers, buyers and sellers navigating the unique challenges of LNG export, import, and LNG to power projects worldwide.
Mayer Brown helps clients navigate the shift toward cleaner energy systems and next-generation technologies. We combine sophisticated legal insight with practical commercial experience to guide businesses as they innovate, invest, and compete in a rapidly transforming energy landscape.
We manage complex, high-value energy disputes for a wide range of global energy companies, from producers and transporters to service providers and national oil companies. Our team excels in commercial and investment litigation and arbitration, delivering strategic, effective advocacy across major international forums.
Mayer Brown’s Renewable Energy practice advises leading financial institutions, sponsors, and funds on complex transactions across wind, solar, storage, and emerging clean energy technologies. We guide clients through development, financing, M&A and restructuring matters worldwide, providing trusted counsel at the forefront of the energy transition.
Trusted by top global chemical companies, our team advises on complex transactional, regulatory, and dispute matters worldwide, drawing on deep industry insight and firsthand sector experience to support the full life cycle of chemical products, projects, and investments.
Advised PRIO on the US$3.5 billion acquisition of Equinor’s 60% participating interest in the Peregrino and Pitangola fields, located in the Campos Basin, offshore Brazil, and the acquisition of a percentage interest in a field in the Campos Basin by acquiring the Dutch subsidiary of Chinese investor, Sinochem, for US$1.9 billion.
Advised Pluspetrol on the acquisition of ExxonMobil Exploration Argentina S.R.L. from ExxonMobil Argentina Investments B.V. and QatarEnergy Argentina Holdings LLC, including stakes in blocks Bajo del Choique-La Invernada (one of the most prolific unconventional fields in the Vaca Muerta formation), Los Toldos I Sur, Los Toldos II Oeste, and Pampa de las Yeguas, in addition to a stake in the Oleoductos del Valle (Oldelval) oil pipeline. The transaction was reported to be worth approximately US$1.7 billion.
Represented Equinor in its US$2 billion sale to OMV of interests in development and producing interests on the UK and Norwegian Continental Shelf.
Represented Sinochem Petroleum USA in the US$1.7 billion acquisition of a 40% undivided interest in approximately 207,000 net oil and natural gas leasehold acres held by Pioneer Natural Resources Company in the horizontal Wolfcamp shale play in West Texas.
Advised GDF International, Engie Brasil Energia S.A. and Caisse de dépôt et placement du Québec in the acquisition of a 90% shareholding stake in Transportadora Associada de Gás S.A. from Petrobras with a final and binding offer amounting to US$8.6 billion.
Acted as international legal advisor to Chevron in its joint venture with YPF, Pluspetrol, Pan American Energy, Pampa Energía, Vista Energy, Chevron, Shell, Tecpetrol, and GyP for the construction and operation of a US$3 billion Vaca Muerta Oil Sur (VMOS) crude oil export pipeline project in Argentina, with initial capacity of 180,000 barrels per day and expansion capacity of up to 550,000 barrels per day. We subsequently advised the Company on a related US$2 billion syndicated loan financing for the construction of the Vaca Muerta Sur Oil Pipeline involving fourteen leading international banks and institutional investors.
Advised POSCO International on its strategic equity investment in the US$45 billion Alaska LNG Project and agreement to supply 1 MTPA of LNG to POSCO and terms for POSCO to supply steel for the project’s gas pipeline.
Advised Goldman Sachs & Co. LLC, as part of an investor consortium, in connection with its debt and equity investment in Port Arthur LNG Phase 2, an LNG infrastructure project developed by Sempra
Advised QatarEnergy on eight separate 27-year LNG SPAs with buyers including Shell, TotalEnergies, ConocoPhillips, Eni, and ExxonMobil, each for the supply of 1 to 2 MTPA of LNG from the North Field East/North Field South expansion projects in Qatar.
Advised PETRONAS on a 20-year FOB LNG SPA with Pembina Pipeline Corporation in respect of 1 MTPA of Pembina’s liquefaction capacity at the Cedar LNG facility, a floating LNG facility in Canada.
Advising a major Japanese energy conglomerate in an equity investment and offtake transaction in a US$7 billion Blue Hydrogen Production Plant and Clean Ammonia Offtake Terminal in Louisiana, including preparing and negotiating the equity, offtake and key project agreements.
Advising Constellation Energy, operator of the largest fleet of nuclear power projects, on the development of an industrial scale ‘pink hydrogen’ project that will utilize nuclear energy to produce hydrogen. We are advising on the full range of development matters, including equipment supply, construction, real estate, and offtake matters.
Advising a North Asian investor on its potential ammonia bunkering project in Singapore including extensive analysis on Singapore regulatory framework and likely approach to the project.
Representing a consortium of sponsors in relation to development, financing, and operation of a 178,000MTPA green hydrogen project in Oman, using approximately 4.5 GW of wind and solar energy coupled with battery storage and an approximately 2.5 GW electrolyser. The produced hydrogen will be supplied to an ammonia plant to be built in the Salalah Free Zone and set to produce 1MTPA of green ammonia.
Representing Storegga in connection with its US CCUS projects, including negotiations for joint venture formation documents, operating agreements, CO2 offtake agreements with several major LNG producers and other emission sources, and pore space lease and surface use agreements with several major LNG producers and other emission sources.
Representing CEMEX, one of the world’s largest cement producers, in several projects and matters relating the CCS and ESG management.
Representing NextDecade Corporation with the capture and sequestration of emissions from its facilities located in Texas, as well as the acquisition of pore space and land rights for several reservoirs for which the company intends to provide sequestration services for future sources of carbon intensive emissions.
Advising the sponsors on the Northern Lights project which aims to transport, receive, and store CO2 below the seabed in the Northern North Sea.
Achieved a significant appellate victory on behalf of TC Energy Corp. in the Delaware Supreme Court, which reversed a US$199 million judgment previously entered against the company in connection with its US$13 billion acquisition of Columbia Pipeline Group Inc.
Represented owners in arbitrations with various contractors regarding cost overruns, delays, and other claims on lengthy segments of a 2,600-mile pressurized gas pipeline from Northern British Columbia to Joliet, Illinois.
Represented an engineering design company in a dispute with a Korean construction company involving deficient design, construction, and offset claims and terminating license of proprietary technology relating to an offshore oil rig in Angola.
Successfully defended BASF AG and its subsidiary Wintershall AG in a multibillion-dollar dispute with Moncrief Oil International Inc. in which Moncrief claimed it was excluded from the exploitation of the Jushno-Russkoye gas field in Siberia. Moncrief had claimed that BASF and Wintershall had encouraged Gazprom to ignore the various contractual obligations allegedly owed to Moncrief.
Acted as lead lawyers for the Ministry of Water Resources on claims of RMB 7 billion on a hydroelectric dam and power plant in Henan Province, China. Various aspects of underground tunneling were investigated and explored.
Successfully represented an engineering firm associated with an international energy company in an arbitration which provided detail design, construction management, and procurement services to the EPC contractor of a cogeneration facility in the Netherlands against claims of malpractice, cost overruns, and delays.
Represented a private equity fund in the approximately US$514 million pending acquisition, by merger, of a combined regulated gas utility and unregulated distributor of propane and several smaller businesses, including controlling interests in two solar facilities.
Represented a utility company, as sponsor, in the tax equity financing of a portfolio of wind projects, including the Frontier II Wind (350 MW) and Maryneal Wind (182 MW) in Oklahoma and Texas, respectively.
