San Miguel Formation

Operator-reported tops from 7,325 wells across 12 counties, median tops running 1,027–11,164 ft by county.

Top depth: 2,658 ft 7,752 ft

2,151 wells shown (sampled from 7,325)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Zavala	3,991	5,040 ft	2,885–5,993	↓
Maverick	1,335	1,498 ft	1,276–1,948	↓
Webb	823	6,487 ft	4,935–7,691	↓
Zavala	368	4,274 ft	1,797–5,420	↓
La Salle	303	6,518 ft	5,837–7,690	↓
Frio	273	5,156 ft	4,323–5,821	↓
Mcmullen	182	9,192 ft	8,052–9,648	↓
Atascosa	18	5,220 ft	1,546–8,525	↓
Medina	15	1,072 ft	1,061–1,076	↓
Live Oak	6	10,287 ft	10,264–10,574	↓
Bexar	6	1,027 ft	999–1,044	↓
De Witt	5	11,164 ft	11,137–11,721	↓

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.