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Cross Keys Energy is a specialist consultancy providing legal, regulatory, commercial and strategic advice and professional skills training to companies, governments and regulatory agencies in the upstream, midstream and downstream oil and gas sectors.

Peter Roberts is the principal owner of Cross Keys Energy.

I advise on regulatory and transactional matters and I also give expert testimony in energy sector disputes and arbitral proceedings.




I am admitted to practice as a solicitor in England and Wales (1991) and in Hong Kong (2000). I trained at Linklaters and I have advised on oil and gas matters since 1994. I was previously in-house counsel with Exxon Corporation (1994-1997) and I was the general counsel of Centrica Energy (2007-2010).  I have been a partner in several major international law firms and I have previously lived and worked in Asia for almost ten years.


I am the emeritus editor of the Journal of World Energy Law and Business, the journal of the Association of International Petroleum Negotiators (AIPN), which I edited from 2008 to 2021.  Before that I was the editor of the International Energy Law Review. I am also a former chairman of the oil and gas law committee of the International Bar Association.


I am a Visiting Professor at the faculty of law at Universidad Austral in Buenos Aires.  I have also lectured on oil and gas matters at the universities of Dundee, Houston, Oxford, Qatar, Queen Mary (London), Ras Al Khaimah and Tulane. 


I have also written several leading industry textbooks, shown below.



Gas and LNG Sales and Transportation Agreements: Principles and Practice (Sweet & Maxwell - ISBN: 9780414061897)

First published in 2004 and now in its sixth edition (2020), this is a comprehensive guide to the law and practice of structuring projects for the sale and transportation of gas and LNG (precedent agreements on CD).

​Joint Operating Agreements (Globe Business Publishing - ISBN: 9781909416628)
First published in 2011 and now in its fourth edition (2020), this book is the leading industry work on joint operating agreements (JOAs), including an analysis of the various leading industry model form contracts.

​Petroleum Contracts: English Law and Practice (Oxford University Press - ISBN: 9780198723998)
First published in 2013 and now in its second edition (2016), this book explains the relevant principles of English law as they are applied to and used in the key provisions of petroleum contracts worldwide.


Oil and Gas Contracts: Principles and Practice (Sweet & Maxwell - ISBN: 9780414034426)
Published in 2016 and now in its third edition (2022), this book is a series of 20 essays contributed by leading authors which cover the standard industry contracts for upstream, midstream and downstream petroleum contracts.


​The AIPN JOA: A Practical Guide (Globe Law and Business - ISBN: 9781787422001)
Published in 2018, this book is a clause-by-clause examination of one of the most widely-used oil and gas industry model form contracts, the AIPN international joint operating agreement.


​A Dictionary of Oil & Gas Industry Terms (Oxford University Press (and the Energy Institute) – ISBN: 9780198833895)
Published in 2019, this is a comprehensive glossary of the legal, commercial, technical and economic terms and phrases used in all aspects of the international oil and gas industry today.

A Practical Guide to Upstream Petroleum Granting Instruments (Qatar University Press – ISBN: 9789927139178)

Published in 2020, this is a practical guide to upstream petroleum granting instruments and includes a clause-by-clause analysis of the terms of a typical production sharing contract.

Drafting and Negotiating Petroleum Royalty Agreements (Globe Law and Business – ISBN: 9781787427983)

Published in 2021, this is a practical guide to the drafting, negotiation and application of petroleum royalty agreements (including drafting examples).


Cross Keys Energy is the trading name of Cross Keys Energy Limited, a limited liability company incorporated in England & Wales with company number 10565932. 

This website is owned and operated by Cross Keys Energy Limited.  The content of this website is for information only.  No relationship between you and Cross Keys Energy Limited or Peter Roberts is created or implied by your access to this website.

Oil and gas platform in the gulf or the


Offshore oil and rig platform in sunset


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