San Juan
Basin

The San Juan Basin is one of the longest-producing oil and gas basins in the United States, with conventional production dating back more than 100 years. The basin spans roughly 7,500 square miles across northwest New Mexico and southwest Colorado, with active modern development concentrated in Rio Arriba County and San Juan County in New Mexico, plus La Plata and Archuleta counties in Colorado.

The basin produces from three principal types of resource: long-running conventional natural gas (primarily from the Dakota and Mesaverde formations), coalbed methane (from the Fruitland Formation, with peak development from the 1980s through 2000s), and more recently horizontal Mancos Shale development. Mineral owners in the basin can hold interests across multiple production types depending on the specific tract and historical lease structure.

The basin’s operator base has shifted substantially over its long history. Burlington Resources was a dominant operator until ConocoPhillips acquired it in 2006. BP America’s Amoco subsidiary was historically active in Fruitland CBM. Today, Hilcorp Energy holds one of the largest current positions, with DJR Operating, Logos Resources, ConocoPhillips, and BP all maintaining meaningful presence. Several smaller and private operators are active in specific areas.

Both New Mexico and Colorado have active oil and gas regulatory frameworks. The New Mexico Oil Conservation Division and Colorado ECMC oversee permitting, pooling, and production reporting on each state’s portion of the basin. The basin’s long production history means many tracts have leases dating back decades, with significantly different terms than modern leases would carry.

In New Mexico, San Juan Basin development is concentrated in Rio Arriba County and San Juan County. Both counties host conventional gas, CBM, and Mancos Shale activity, with operators selecting development based on the specific tract’s geological position and existing infrastructure.

In Colorado, the basin extends into La Plata County (centered on Durango) and Archuleta County. Colorado-side activity is lighter than the New Mexico core but includes both conventional and CBM production with selective Mancos development.

Mineral rights in the San Juan Basin are typically valued on a combination of existing producing well economics and any remaining development potential on the tract. Many San Juan Basin tracts have been producing for decades, with multiple wells across multiple formations contributing to royalty income.

The basin’s long production history means many leases date back to the original conventional development era. Older legacy leases often carry royalty terms and post-production cost language meaningfully different from modern leases. The vintage of any lease covering a property is often a significant factor in net royalty income, and tracts can have multiple leases covering different formations or different portions of the property if the lease history is fragmented.

Royalty paperwork in the San Juan Basin frequently shows multiple legacy operator names. Burlington Resources (acquired by ConocoPhillips in 2006), El Paso Energy, BP America’s Amoco subsidiary, and several other names appear on older statements. The underlying mineral interest carries over unchanged through each operator transaction; what changes is the company administering the payment. The current operator on any specific well can be confirmed through the New Mexico OCD or Colorado ECMC well search.

For inheritors with San Juan Basin interests, the basin’s long production history means that the tract often comes with a mix of producing wells, suspended wells, and acreage that has not been developed. Understanding what is currently producing, what has been plugged, and what development potential remains is typically the first step in evaluating the position.

If you are considering selling mineral rights in the San Juan Basin, we pull operator activity in your specific area, look at well histories across the producing formations, evaluate the lease vintage and language, and produce a written analysis of what your interest is worth. We are happy to do this for any Rio Arriba, San Juan, or surrounding county tract regardless of size.