Duffer "A" Unit Mineral Rights — Eastland County, Texas (Byrne Oil Company)

Unit Overview

About the Duffer "A" Unit

The Duffer "A" Unit is home to the #1 individual oil well in Eastland County: Duffer "A" 9 (API 4213337799), a vertical well spudded in 2000 that produced 328 bbl in February 2026. The well alone accounts for over 85% of the unit’s monthly production.

The unit produces from the Lower Duffer formation — a specific named member of the broader Pennsylvanian sequence. Duffer-target wells are notable in Eastland County for their somewhat higher per-well productivity compared to the dominant Marble Falls and Strawn completions.

Byrne Oil Company is a smaller private operator focused on the Adams field area. With only 7 active wells, the unit is concentrated; the bulk of the value sits in well #9.

Mineral Interest Profile

Mineral interests in the Duffer "A" 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) — royalty carved out of a working interest

Non-participating royalty interest (NPRI) — royalty interest with no leasing or development rights

Many Duffer "A" Unit interests trace their original lease bonus payment to the 1917-1925 Ranger oil boom era, with current ownership having passed through 3-5 generations of heirs.

Selling Duffer "A" Unit Mineral Rights

Buckhead Energy buys mineral rights and royalty interests on the Duffer "A" Unit. Out-of-state owners are common — we handle the entire process remotely with free written offers, deed signed before a notary in your state, and proceeds wired the day of recording.

Eastland County Mineral Rights Hub

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