The South Cowden Field in Ector County, Texas was discovered in 1933 on the eastern flank of the Central Basin Platform, forming the southern end of the great Cowden–Johnson–Foster producing trend that surrounds Odessa. The Grayburg and San Andres interval here holds an estimated 570 million barrels of oil in place, and the field became nationally significant in the 1990s as the site of a Department of Energy-supported CO2 flood using horizontal injection wells. For mineral owners, South Cowden pairs deep production history with a documented enhanced-recovery future.
Source: Texas Railroad Commission production filings, aggregated across RRC field designations 21292001, 21292125, 21292250. Reported volumes lag the calendar by several months.
South Cowden was discovered in 1933, three years after North Cowden opened the trend, as drilling worked south along the Cowden family’s ranchlands. Together with the adjacent Foster and Johnson fields, developed in the same era, it created a nearly continuous belt of shallow Grayburg production from a 550-foot-thick carbonate section. The boom populated western Ector County with camps, gasoline plants, and the dense well spacing typical of Depression-era development.
Waterflooding arrived with post-war unitization, and the trend became a patchwork of flood units — the South Cowden Unit, the Moss and Emmons units, and neighbors — operated over the years by companies including Phillips, Unocal, and Fina. Decades of injection recovered a large share of the mobile oil, and by the 1990s the units were approaching waterflood depletion, setting the stage for the field’s most innovative chapter.
In the mid-1990s the South Cowden Unit hosted a DOE Class II demonstration project: a CO2 flood designed with advanced reservoir characterization and horizontal injection wells — an early, closely watched application of horizontal injectors in a shallow-shelf carbonate. The project generated a rich public technical record and pointed the way for CO2 development across similar Permian reservoirs. The unit later passed to major operators, with lease records in recent years associating it with ConocoPhillips.
South Cowden produces from Grayburg dolomites, with underlying San Andres pay, at depths of roughly 4,000 to 5,000 feet. The reservoir is a diagenetically altered shallow-shelf carbonate whose 570 million barrels of oil in place yield a projected ultimate recovery near 162 million barrels — a recovery efficiency around 28 percent that leaves an enormous remaining target. Permeability variation from dolomitization and karsting controls where injection water and CO2 actually sweep, which is why the field became a benchmark for pairing reservoir characterization with flood design.
South Cowden’s enhanced-recovery credentials are unusually well documented. After decades of waterflood, the South Cowden Unit implemented a CO2 flood in the 1990s using horizontal injection wells and advanced characterization under a DOE demonstration program — technology choices that were ahead of their time for shallow carbonate floods. With barely a quarter of the oil in place recovered by conventional means, the field represents exactly the kind of resource that justifies continued injection investment. Royalty owners share in every incremental barrel that recovery technology unlocks, without contributing capital.
Owning minerals or royalties at South Cowden means owning a slice of a reservoir where roughly three-quarters of the original oil is still in the ground and where operators have already demonstrated the tools to chase it. Interests here are typically paid through long-established units, and their value depends on unit decimals, flood performance, and remaining-recovery potential rather than headline well counts. We buy minerals and royalties in Ector County and provide free written offers.
County-level well data, production charts, and selling guides for the counties this field spans:
Yes. The field has produced since 1933 and its units remain active, with waterflood and CO2-based recovery supporting output from the Grayburg and San Andres interval south of the North Cowden trend.
The flood units were historically operated by companies including Phillips, Fina, and Unocal, and the South Cowden Unit has in recent years been associated with ConocoPhillips in state lease records. Your division order names your unit’s current operator.
Gather your division orders and recent statements, confirm your unit decimal, and get a written offer that credits the field’s large remaining oil in place and flood support. We evaluate these interests directly and provide free written offers.