Lawyers Rush to File Oilfield Suits Before New Law Takes Effect

Firms aim to take advantage of 'landowner-friendly' version of Act 312 before it expires

Mar. 12, 2026 at 2:35pm

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Lawyers in Louisiana are rushing to file oilfield contamination lawsuits against oil and gas companies before a new state law, Act 458, takes effect on September 1, 2027. The law is expected to make future 'legacy' cases harder for plaintiffs to win, as it overhauls the state's legacy-litigation framework. Leading the push is the Baton Rouge firm Talbot, Carmouche and Marcello, which has filed more than a dozen new inland legacy suits in the past year, alleging issues like unlined pits, leaking wells, spills, and abandoned equipment.

Why it matters

This legal battle is part of the ongoing tension between the energy sector and landowners in Louisiana over environmental damage from decades of oilfield activity. The new law is seen by industry groups as a way to curb what they call 'problematic' and 'retroactive' lawsuits, while plaintiffs argue companies must be held accountable for contamination, even if it was under permits at the time. The outcome could impact the state's oil and gas industry, which has already seen a sharp decline in rigs since the 'modern wave' of legacy lawsuits began in 2003.

The details

Act 458, signed by Gov. Jeff Landry last year, overhauls Louisiana's legacy-litigation framework, while the state's Office of Conservation continues to oversee remediation under Act 312, the law that has governed oilfield site cleanup claims for years. The Talbot, Carmouche and Marcello firm is warning prospective clients that only suits filed before Sept. 1, 2027, will proceed under the current, more 'landowner-friendly' version of Act 312. After that, the firm says, landowners lose the 'low burden of proof,' the ability to seek full remediation through the courts and access to broader damages.

  • Act 458 was signed by Gov. Jeff Landry last year.
  • The new law, Act 458, is set to take effect on September 1, 2027.

The players

Talbot, Carmouche and Marcello

A Baton Rouge law firm that has filed more than a dozen new inland legacy suits against oil and gas companies in the past year, alleging issues like unlined pits, leaking wells, spills, and abandoned equipment.

Gov. Jeff Landry

The governor of Louisiana who signed Act 458 into law last year, overhauling the state's legacy-litigation framework.

Melissa Landry

The director of the Pelican Center for Energy at the Pelican Institute for Public Policy, a critic of the latest string of oilfield contamination lawsuits.

Mike Phillips

Chevron's lead trial counsel in a $740 million verdict against the company in a coastal legacy case last year.

ConocoPhillips

An oil and gas company that is a defendant in one of the new inland legacy lawsuits filed by Talbot, Carmouche and Marcello.

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What they’re saying

“By passing this law, and then delaying the implementation for 18 months, what it essentially says to the lawyers who are driving this litigation is it's like a free pass to continue filing these very problematic lawsuits for another 18 months.”

— Melissa Landry, Director, Pelican Center for Energy at the Pelican Institute for Public Policy (stmarynow.com)

“What we're seeing is a retroactive application of liability. They had a permit to conduct operations. They carried out those activities under the terms of those permits. And it is only many, many decades later that there has been this attempt to go back in time and apply a new or different legal standard.”

— Melissa Landry, Director, Pelican Center for Energy at the Pelican Institute for Public Policy (stmarynow.com)

“This extended timeline incentivizes a last-minute rush of questionable legacy lawsuits, as plaintiffs' attorneys are now encouraged to flood the courts with claims before the new reforms take effect.”

— Mike Phillips, Chevron's lead trial counsel (stmarynow.com)

What’s next

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The takeaway

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