Olmos Formation

Operator-reported tops from 21,503 wells across 19 counties, median tops running 406–11,481 ft by county.

Top depth: 2,018 ft 9,178 ft

6,635 wells shown (sampled from 21,503)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Zavala	4,393	4,143 ft	2,224–5,051	↓
Webb	4,016	5,882 ft	3,975–7,533	↓
La Salle	3,505	6,795 ft	5,513–8,140	↓
Mcmullen	2,700	8,942 ft	7,513–10,535	↓
Atascosa	1,915	5,556 ft	1,460–8,754	↓
Bexar	1,301	1,289 ft	839–1,501	↓
Frio	997	4,424 ft	3,125–5,981	↓
Medina	807	903 ft	789–1,040	↓
Zavala	643	3,816 ft	1,820–4,467	↓
Maverick	463	1,050 ft	517–2,116	↓
Karnes	330	9,468 ft	8,039–10,347	↓
Wilson	254	6,671 ft	5,979–7,490	↓
Live Oak	62	9,790 ft	9,297–12,019	↓
Gonzales	50	7,890 ft	5,838–9,502	↓
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.