International Society of Primerus Law Firms
Bob J. Duplantis, Of Counsel
Practice Areas:
  • Oil, Gas and Energy Transactions
  • Energy Litigation
  • Oil and Gas Litigation
  • Natural Resources
  • Oil and Gas Regulation
  • Oil and Gas
  • Energy

New Orleans Attorney
Bob J. Duplantis, Of Counsel

Phone: 504.582.1111


Languages: English

Bob Duplantis has dedicated his entire career to the oil and gas industry. Prior to joining the firm in 1982 and establishing its Lafayette office, Bob spent more than a decade serving in-house oil company legal departments, including six years as a lobbyist in Baton Rouge, Louisiana.

Bob’s law practice focuses on Louisiana oil and gas regulation and “meat-and-potato” legal issues. He routinely argues contract disputes affecting the oil and gas industry, including lease interpretation and operational issues, joint operating agreements, oil and gas marketing and sales issues and forced pooling issues. He regularly represents clients before the Louisiana Office of Mineral Resources and the Louisiana Department of Natural Resources (primarily the Office of Conservation), where he has handled more than a thousand adjudicatory hearings. He frequently addresses industry groups such as the annual Mineral Law Institute at LSU. He has also previously served on the board of directors for an independent oil company.

Prior to practicing law, Bob spent 10 years working in exploration and production in various engineering and management assignments throughout Louisiana, Texas, California, and New York.


  • Oil, Gas and Energy Regulatory
  • Oil, Gas and Energy Litigation and Arbitration
  • Oil, Gas and Energy Transactions


  • Construction
  • Energy and Natural Resources


  • Louisiana
  • U.S. Supreme Court
  • U.S. Court of Appeals, 5th Circuit
  • U.S. District Court, Middle District of LA
  • U.S. District Court, Eastern District of LA


  • Loyola University New Orleans College of Law, J.D. 1966
  • LSU, B.S. Petroleum Chemical Engineering 1961


  • American Bar Association
  • American Association of Professional Landmen (AAPL) JOA FORM 610 Revision Committee Mid-Continent Oil and Gas Association
  • Louisiana State Bar Association Lafayette Parish Bar Association
  • Louisiana State Office of Conservation Intrastate Pipelines Ad Hoc Committee Committee on Revision of Rules of Procedure, La. State Office of Conservation Advisory Committee, La. State Commissioner’s Office of Conservation


  • Best Lawyers in America – Administrative / Regulatory Law (2020) American Bar Foundation – Fellow
  • Acadiana Profile Magazine “Top Lawyers” List – Oil & Gas Law; Administrative/Regulatory Law; Energy Law (2014, 2015 and 2019)
  • Chambers USA – Energy & Natural Resources: Oil & Gas (Since 2006) Best Lawyers in America – Energy Law; Oil & Gas Law (Since 2008)
  • Best Lawyers in America – Lawyer of the Year in Lafayette for Oil and Gas Law (2018); Lawyer of the Year in Lafayette for Energy Law (2016)


  • Preferential Rights to Purchase and Consent to Assign Provisions 46th Mineral Law Institute, March 25-26, 1999
  • The ‘Take-or-pay’ Controversy: Considerations of the Seller 32nd Mineral Law Institute, March 28-29, 1985
  • Unanswered Questions after Frey v. Amoco 40th Mineral Law Institute, March 25-26, 1994

Contact This Firm

Gordon Arata Montgomery Barnett

201 St. Charles Avenue
40th Floor
New Orleans, LA 70170
United States

Law Firm Contact: John Y. Pearce

Tel: 504.582.1111

Fax: 504.582.1121



Member Since: 2009

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