Meramec
Formation

The Meramec is a Mississippian-age interval of interbedded limestone, siltstone, and shale that is the primary target of the STACK play in the Anadarko Basin of western Oklahoma. It is developed across Kingfisher, Canadian, and Blaine counties, and it is one of the formation names mineral owners in that part of the state most often see on their wells.

Therocks beneath your minerals.

The Meramec belongs to the broader Mississippian section that drillers once worked vertically as the “Mississippian Lime.” Horizontal drilling and modern completions reopened it as a distinct target, with the Meramec sitting above the Osage and both resting on the Woodford, the organic-rich shale that sourced much of the oil and gas in the area.

Across the STACK fairway the Meramec commonly falls between roughly 8,000 and 12,000 feet, deepening toward the basin axis to the south. Its rock quality and the proportion of oil to gas vary across the play, which is why operators tailor development to local conditions rather than a single template.

Because the Meramec, Osage, and Woodford are stacked vertically, a single tract can host wells in more than one of them, developed over different phases of the play.

Where theproduction lives.

The Meramec anchored the STACK when horizontal development expanded across Kingfisher and Canadian counties. Devon Energy has been a leading STACK operator, and Ovintiv, through its acquisition of Newfield Exploration, carries a long-running STACK position. Other Anadarko operators include the Meramec in their inventory alongside the deeper Woodford.

Meramec wells produce a liquids-rich mix of oil and natural gas, with the balance shifting by location and depth. Development across western Oklahoma is governed by the Oklahoma Corporation Commission, which sets spacing and handles the pooling process that assembles a drilling unit.

The current operator and completed formation on any specific well can be confirmed through the Commission’s public well records.

Mineral rights in theMeramec.

Mineral owners across the STACK commonly see Meramec wells on their tracts, sometimes alongside Osage or Woodford wells in the same area. A single drilling unit can generate staged royalty income as different layers are developed over the life of the play.

For inheritors with western Oklahoma minerals, knowing whether your wells are completed in the Meramec, the Osage, or the deeper Woodford helps explain what you are receiving and why one tract can carry several producing interests.

Lease terms and pooling elections across Oklahoma vary by vintage and by tract, and that language can affect net royalty income beyond what the well data alone would suggest. We are happy to walk through what your specific situation looks like alongside the public well records, on a call or by email.