Olmos Formation

Operator-reported tops from 21,584 wells across 19 counties, median tops running 406–11,481 ft by county.

Top depth: 2,025 ft 9,178 ft

6,704 wells shown (sampled from 21,584)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Zavala	4,408	4,146 ft	2,224–5,051	↓
Webb	4,044	5,891 ft	3,977–7,568	↓
La Salle	3,512	6,796 ft	5,516–8,145	↓
Mcmullen	2,713	8,943 ft	7,515–10,537	↓
Atascosa	1,915	5,556 ft	1,460–8,754	↓
Bexar	1,301	1,289 ft	839–1,501	↓
Frio	1,000	4,422 ft	3,126–5,981	↓
Medina	807	903 ft	789–1,040	↓
Zavala	649	3,818 ft	1,820–4,474	↓
Maverick	465	1,050 ft	517–2,116	↓
Karnes	333	9,464 ft	8,038–10,346	↓
Wilson	256	6,674 ft	5,997–7,490	↓
Live Oak	63	9,775 ft	9,298–11,971	↓
Gonzales	51	7,919 ft	5,840–9,490	↓
Bee	30	10,816 ft	10,158–12,640	↓
De Witt	15	11,481 ft	10,408–11,863	↓
Lavaca	9	9,163 ft	8,684–11,896	↓
Milam	7	406 ft	400–408	↓
Fayette	6	7,110 ft	6,608–8,544	↓

Counties with fewer than 5 wells omitted. Depths are measured depth as filed; typical range is the 10th–90th percentile of reported tops — raw filings contain occasional typo depths, so extremes are not shown.