An owner's guide to mineral rights on the Seminole San Andres Unit — operated by Occidental Petroleum (OXY) on the Seminole field in west Texas Permian Basin.
Quick answer
Unit type: Long-tenured unitized oil operation
Statewide context: Texas oil & gas production distribution
The Seminole San Andres Unit is one of the long-tenured unitized oil units in the west Texas Permian Basin — a long-lived unit with the slow, steady production profile that characterizes mature unitized oil operations in the Permian Basin. For statewide context, see Buckhead’s Texas oil & gas production distribution.
OXY operates the Seminole San Andres Unit (SSAU) — one of OXY's flagship CO2 EOR projects in the Permian Basin and one of the best-known CO2 floods in the Permian Basin.
The Seminole field sits in the Permian Basin. The field has a long, continuous production history. Modern operating consolidation under the Seminole San Andres Unit framework has stabilized field-level production through pressure maintenance, waterflood, and (where applicable) CO2 enhanced oil recovery (EOR) operations.
For broader context on the Permian Basin producing region, see our Permian Basin mineral rights guide.
Mineral interests in the Seminole San Andres Unit typically take one of these forms:
Producing royalty interest — your tract's contribution to the unit's monthly revenue, paid by the operator
Non-producing mineral interest — fee mineral ownership in a tract currently outside active producing zones
Overriding royalty interest (ORRI) — a royalty carved out of a working interest
Non-participating royalty interest (NPRI) — a royalty interest with no leasing or development rights
Many Seminole San Andres Unit interests are inherited multiple generations deep, with original lease bonus paid in the 1930s-1960s era. Current Seminole San Andres Unit mineral owners frequently include heirs spread across multiple states.
Direct buyers value Seminole San Andres Unit mineral interests using a discounted cash flow approach with these key inputs:
Decline rate — slow, typical of long-life unitized waterflood / EOR wells
Remaining reserve life — long on actively-maintained units
Operator quality — well-maintained units (Occidental Petroleum (OXY) is established in west Texas Permian Basin) typically deliver predictable production
EOR upside — many Permian Basin units have CO2 EOR or other tertiary recovery upside not reflected in current production rates
Discount rate — market-based, reflecting stable unitized cash flows
Buckhead Energy buys mineral rights and royalty interests on the Seminole San Andres Unit. Out-of-state owners are common — many interests are inherited multiple generations deep. We handle the entire process remotely: free written offer by email, deed signed before a notary in your state, recorded with the Gaines County clerk, and payment typically made by check after the deed is recorded.
Buckhead provides a free written offer. Our offer comes at no cost and no obligation.
Start Your Free Written OfferGet a written offer from a direct buyer with 20 years in business.
Sell My Mineral RightsPermian CO2 EOR (Wasson, Slaughter, Seminole) and Mississippi Jackson Dome CO2 EOR (Heidelberg, Eucutta, Tinsley) are the two largest U.S. CO2 EOR clusters. For owners with interests across both:
Texas vs Mississippi Mature Oil Units — Comparison
Buckhead Energy buys mineral and royalty interests across all 50 states and has completed acquisitions in 33 states. Buckhead Energy is a direct buyer, not a broker — we purchase mineral and royalty interests with our own capital. Buckhead Energy has been buying mineral and royalty interests since 2006. Buckhead Energy holds an A+ rating with the Better Business Bureau.
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