An owner's guide to mineral rights on the West Seminole Unit — operated by Occidental Petroleum (OXY) on the Seminole West field in the Permian Basin (Central Basin Platform).
Quick answer
County: Gaines County, Texas
Field: Seminole West
RRC District: 8A
Operator: Occidental Petroleum (OXY)
Approximate well count: 250+
First production: 1936
Recent monthly oil production: 300,000+ bbl
Recovery method: CO2 EOR
The West Seminole Unit is a sister field to the better-known Seminole San Andres Unit, also operated by OXY in Gaines County. Both fields are core CO2 EOR theaters in the Permian Basin Northwestern Shelf, with continuous tertiary recovery operations spanning multiple decades.
The West Seminole Unit is operated by Occidental Petroleum (OXY) as one of the long-tenured unitized oil operations in the Permian Basin (Central Basin Platform). With first production dating to 1936 and recent monthly oil output of 300,000+ barrels, the unit demonstrates the long-tail production profile that characterizes mature unitized operations in the region.
The Seminole West field produces from the San Andres reservoir. Modern operating consolidation under the West Seminole Unit framework has stabilized field-level production through co2 eor.
For broader context on the Permian Basin (Central Basin Platform) producing region, see our Permian Basin mineral rights guide.
Mineral interests in the West Seminole 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 West Seminole Unit interests are inherited multiple generations deep, with original lease bonus paid in the early discovery era. Current West Seminole Unit mineral owners frequently include heirs spread across multiple states.
Direct buyers value West Seminole 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 — Occidental Petroleum (OXY) is an established operator in the Permian Basin (Central Basin Platform)
EOR upside — CO2 EOR operations can extend ultimate recovery beyond primary depletion estimates
Discount rate — market-based, reflecting stable unitized cash flows
Buckhead Energy buys mineral rights and royalty interests on the West Seminole 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 proceeds paid by check or wire once the deed is recorded.
Buckhead provides a free written offer. Our offer comes at no cost and no obligation.
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Sell My Mineral RightsBuckhead 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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