The Cement field, on the Caddo-Grady county line southwest of Oklahoma City, is one of the older producing areas on the southeastern flank of the Anadarko Basin. It is best known outside Oklahoma for something visible at the surface: the Permian red beds above the field are bleached and unusually cemented, an alteration halo produced by hydrocarbons leaking upward from the reservoirs below. That halo made Cement a textbook case study for surface geochemical exploration. Beneath it, the field has produced from stacked Pennsylvanian and Permian sands for more than a century.
Production at Cement dates to the World War I era, conventionally placed in 1917, when operators drilled the broad anticline that the altered surface rocks helped define. Development continued in waves as deeper sands were found and as drilling technology reached targets the early cable-tool rigs could not. Because the field sits under farm and ranch country in Caddo and Grady counties, leasing proceeded quarter by quarter, and the mineral reservations made in those decades are the direct ancestors of the fractional interests recorded in both counties today.
Cement’s scientific reputation grew alongside its production. Geochemists studied the bleached red beds, the carbonate cement, and the isotopic signature of that cement, and concluded that hydrocarbons and associated waters migrating up from the field had chemically altered the rock column above it. The work became a standard reference for anyone arguing that seeps and subtle surface alteration can point to accumulations at depth. For owners, the practical significance is simpler: the same vertical plumbing that altered the surface indicates a long-lived, multi-zone accumulation beneath their tracts.
The modern field is a mature one. Primary depletion gave way to water injection, well counts stabilized, and operatorship moved from the larger companies that opened the field down to Oklahoma independents and small operators working mature waterfloods. Deeper Anadarko Basin drilling in the surrounding area has periodically renewed interest in the acreage, but the shallow oil zones that define the named field itself behave like the mature Mid-Continent floods they are: low rates, long lives, and royalty checks that persist rather than grow.
Cement produces from Pennsylvanian and Permian sandstones — the Fortuna and Medrano sands among them — draped over a faulted anticline on the deep southeastern margin of the Anadarko Basin. Sand quality varies with depositional setting, so pay thickness changes across the structure and lease-level results differ accordingly. The feature that sets Cement apart is above the reservoirs rather than in them: leaking hydrocarbons altered the overlying Permian red beds, bleaching iron oxides and precipitating carbonate cement, which is how the field got its enduring role in the exploration literature.
Cement follows the standard Mid-Continent secondary-recovery path. After primary pressure declined, operators injected water into the producing sands to re-pressure the reservoir and sweep oil toward producing wells, and injection has carried the field for decades. Enhanced recovery here is a matter of pattern management — converting producers to injectors, realigning patterns, returning idle wells to service — rather than any single headline project. For a royalty owner, that means a flatter, longer decline than a primary well would show, and output that responds to operator investment.
Caddo and Grady county mineral title runs deep and tangled, with reservations dating from the early twentieth century and interests divided repeatedly since. Cement interests can also carry exposure to deeper Anadarko Basin drilling that has nothing to do with the shallow oil zones, which makes a blanket per-acre valuation misleading in both directions. We read the lease, the depth severance if any, and the flood status before quoting. We buy minerals and royalties in Caddo and Grady counties and provide free written offers.
County-level well data, production charts, and selling guides for the counties this field spans:
Because of its surface alteration halo. Hydrocarbons migrating upward from the field chemically altered the overlying Permian red beds, bleaching them and cementing them with carbonate. The Cement halo became a standard case study for surface geochemical exploration — evidence that what is visible at the surface can reveal an accumulation thousands of feet below.
It depends entirely on your documents. Many Oklahoma mineral interests are severed by depth or limited by the terms of an old lease, so an owner can hold the shallow oil sands and not the deeper Anadarko targets, or the reverse. We check the record before making an offer and will tell you what we find either way.
Yes, at mature rates. The named field is a long-established waterflood area with modest per-well production and a long history of operator turnover. It is stripper economics, not a growth story, and any offer we make reflects the actual decline behaviour of the specific leases involved.