Department profile
Marval O'Farrell Mairal

Energy & Natural Resources: Oil & Gas

Latin America Guide 2026 : Argentina

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Marval O'Farrell Mairal

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About

Provided by Marval O'Farrell Mairal

Marval’s oil and gas practice group has played a leading role in Argentina’s hydrocarbons’ sector for more than 15 years. 

Our oil and gas practice group advises IOCs, NOCs, investors (equity and debt) and oil services companies on matters covering the entire hydrocarbons’ supply chain, from E&P to mid and downstream, including specific LNG-related matters, and all other aspects of this regulated industry.

We are renowned for assisting clients with complex and sophisticated transactions. We have a particularly strong track record in the natural gas market, and have been involved in many of the high-profile disputes in this area.

Our oil and gas practice covers a wide range of matters including:

  • Advice on upstream projects, including regulatory and environmental issues, both at federal and provincial levels, and negotiation of association contracts (JOAs, farm-in and assignment agreements), production sale arrangements, bid and study agreements and oil services contracts. Hydrocarbons’ transportation and distribution
  • Commercial and regulatory matters, including antitrust issues.
  • Advice on contracts and customs’ matters
  • M&As
  • Financing
  • Litigation 

Chambers Review

Provided by Chambers

Energy & Natural Resources: Oil & Gas - Argentina

Band 2

What the Team is Known For

Marval O'Farrell Mairal's highly reputable oil and gas department offers outstanding full-service capabilities. Its team has particular strength in conflict resolution, representing clients in administrative proceedings, commercial litigation and arbitration within the sector. Its deep bench of practitioners is well placed to assist with transactional matters such as sector-related M&A, joint ventures and gas exports. The department also handles regulatory mandates, including dealing with liquefied natural gas permits. It shows competent handling of offshore exploration.

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Work Highlights

Provided by Chambers

  • Marval O'Farrell Mairal assisted Golar LNG with the first LNG project in Argentina from a regulatory, tax, custom and FX perspective.

Strengths

Provided by Chambers

  • Marval O'Farrell Mairal's up-to-date understanding of the market enables them to align their advice with the client’s business vision and needs. Their foresight consistently adds real strategic value.

    Energy & Natural Resources: Oil & Gas respondentLatin America

Notable Practitioners

Provided by Chambers

  • Francisco A Macías
    Francisco A Macías

    Francisco A Macías

    Noted partner Francisco Macías has a longstanding presence advising local and international clients on oil and gas mandates. He is held in high esteem for his work across transactional, regulatory and contractual matters.

    • Francisco Macías brings extensive and in-depth experience, with a strong understanding of both the legal practice and the way local governments work. His insight is highly valuable.

      Energy & Natural Resources: Oil & Gas respondentLatin America
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  • Arturo A Pera
    Arturo A Pera

    Arturo A Pera

    Partner Arturo Pera operates an oil and gas practice that spans a range of matters, including potential offshore investments and regulatory matters pertaining to permits.

    • Arturo Pera demonstrates a high standard of quality, sharp synthesis and analytical capabilities, and a solid foundation in his approach.

      Energy & Natural Resources: Oil & Gas respondentLatin America
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Ranked Individuals at Marval O'Farrell Mairal (2)

Argentina

  • Profile image of Francisco A Macías

    Francisco A Macías

    Head of Energy & Natural Resources: Oil & Gas

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Members

Provided by Marval O'Farrell Mairal

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