An owner’s guide to mineral rights in the Marble Falls Limestone — the leading producing formation in Eastland County, Texas, and a major Pennsylvanian carbonate of the Bend Arch.
Quick answer
The Marble Falls Limestone is a Pennsylvanian-age carbonate formation that’s the leading productive reservoir in Eastland County, Texas. The formation is named after Marble Falls, TX (Burnet County, central Texas) where it was first described.
In the Bend Arch / Eastland County area, the Marble Falls sits within the broader Pennsylvanian sequence below the Caddo Limestone and above (or interfingering with) the Strawn Group sandstones.
Age: Pennsylvanian (Carboniferous, ~315 million years old)
Lithology: Limestone (carbonate) with localized chert and dolomite
Typical depth: 2,800-4,000 ft TVD in Eastland / Stephens / Palo Pinto counties
Porosity: 6-12% (moderate; lower than the overlying Caddo)
Permeability: low matrix; fracture-enhanced effective permeability
The Marble Falls is one of Eastland County’s leading producing formations, worked mostly by small private operators such as Ronning Gas & Oil, Hanvey Don H Oil Interests and Lowrance, with much of the activity in the southern part of the county. For county-level figures — how many wells fall in each monthly production band — see the Eastland County production distribution; it shows aggregates only and lists no individual well.
Marble Falls Limestone wells produce primarily oil with limited associated gas. Modern production is dominated by long-life waterflood operations:
Per-well rate: low, stripper-level rates typical (stripper economics)
Decline rate: 4-8% annual on mature waterflood
Reserve life: 10-25 years on actively-maintained units
Variability: Marble Falls reservoir character is heterogeneous; localized fracture networks create production sweet spots, while adjacent wells in the same lease may be near-zero producers
If your mineral interest produces from the Marble Falls Limestone, Buckhead Energy can provide a free written offer. Most Marble Falls interests in Eastland County are inherited multiple generations deep from the 1917-1925 Ranger boom era.
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