The Haynesville formation
Geology, footprint, and mineral-owner context for the Haynesville, drawn from public USGS and state survey sources. Resource figures describe the play as a whole and are not a per-acre value. Every figure on this page is an estimate subject to verification of your specific interest.
Last updated June 2026.
What is the Haynesville?
The Haynesville is a deep, hot, over-pressured Jurassic-age shale that is one of the largest natural-gas plays in the United States, concentrated in the parishes of northwest Louisiana, such as DeSoto, Caddo, Bossier, and Red River, and the deep East Texas counties of Harrison and Panola. In 2025 the USGS assessed the Haynesville and Bossier formations together at a mean of about 47.9 trillion cubic feet of undiscovered, technically recoverable gas, a play-wide figure rather than a per-acre yield.
The Haynesville is a premier dry-gas shale. It lies deep, often 10,500 to 13,500 feet, and is unusually hot and over-pressured, which lets its wells produce gas at very high initial rates. The play straddles the Louisiana and Texas line, with the most active development in the northwest Louisiana parishes of DeSoto, Caddo, Bossier, and Red River and the deep East Texas counties of Harrison and Panola. Because Haynesville interests are gas-weighted, their value moves with natural-gas prices more than oil-weighted plays do, and proximity to Gulf Coast LNG export demand has kept the play active. For a mineral owner, a Haynesville royalty is valued on the income the wells actually pay, on the same income multiple used everywhere, not on the play-wide resource number.
Haynesville geology
- Age and lithology
- Upper Jurassic organic-rich, calcareous mudstone and shale, deep and over-pressured. Source: USGS Gulf Coast assessment.
- Hot and over-pressured
- High reservoir temperature and pressure drive very high initial gas rates, with steep early decline typical of the play.
- Where it produces
- Northwest Louisiana parishes (DeSoto, Caddo, Bossier, Red River) and deep East Texas counties (Harrison, Panola), with the Bossier formation stacked above it.
How much oil and gas the Haynesville holds
In 2025 the USGS assessed the Haynesville and Bossier formations of the Gulf Coast to hold a mean of about 47.9 trillion cubic feet of undiscovered, technically recoverable natural gas. This is an undiscovered play-wide estimate, not proven reserves and not a measure of any individual property.
Source: USGS Fact Sheet 2025-3054 (Haynesville and Bossier formations, Gulf Coast).
Counties in the Haynesville play
These are the counties and parishes we cover where the Haynesville produces. Each links to local value context and the operators active there.
What the Haynesville means for your minerals
A resource estimate for a play is not the value of your acreage. Your mineral and royalty interest is valued on the income your wells actually pay, roughly 36 to 72 times your average monthly royalty check, the same as 3 to 6 times your annual royalty. Where you land in that band depends on your wells decline, the operator, your royalty rate, and any undeveloped drilling upside. For the full method and a free on-screen estimate, see what are my mineral rights worth.
The Haynesville is part of the Haynesville Shale. For the basin-wide value bands and the counties we buy in, see the Haynesville Shale page.
Haynesville questions
- What is the Haynesville shale?
- The Haynesville is a deep, hot, over-pressured Jurassic-age shale that is one of the largest natural-gas plays in the United States. It is concentrated in northwest Louisiana parishes like DeSoto, Caddo, and Bossier and deep East Texas counties like Harrison and Panola.
- Why do Haynesville royalties move with gas prices?
- The Haynesville is a dry-gas play, so its royalties are paid almost entirely on natural gas. That makes a Haynesville check more sensitive to gas prices than an oil-weighted Permian or Bakken interest, though proximity to Gulf Coast LNG export demand has supported the play.
- Does the Haynesville resource estimate value my minerals?
- No. The USGS figure is an undiscovered, technically recoverable estimate for the entire play, not proven reserves and not a per-acre value. Your interest is valued on the income your wells actually pay, roughly 36 to 72 times your average monthly check. This is an estimate, subject to verification, not an offer.
Sources
See what your Haynesville minerals could be worth
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