Carrizo Formation

Operator-reported tops from 10,121 wells across 25 counties, median tops running 456–9,035 ft by county.

Top depth: 2,000 ft 5,667 ft

4,278 wells shown (sampled from 10,121)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Karnes	3,997	4,458 ft	3,450–5,752	↓
Gonzales	1,284	3,260 ft	1,942–4,613	↓
Mcmullen	1,132	4,637 ft	3,240–5,105	↓
Atascosa	1,117	3,007 ft	1,580–4,035	↓
Anderson	651	534 ft	406–580	↓
La Salle	603	2,636 ft	2,000–3,599	↓
Webb	375	3,395 ft	1,604–6,556	↓
Zapata	187	4,872 ft	3,633–5,901	↓
Wilson	174	1,030 ft	300–2,100	↓
Houston	139	1,546 ft	1,514–1,916	↓
Live Oak	119	5,096 ft	4,350–5,709	↓
Frio	86	1,550 ft	608–2,210	↓
Dimmit	39	950 ft	300–1,460	↓
De Witt	39	6,065 ft	2,581–6,483	↓
Trinity	38	1,834 ft	1,800–2,276	↓
Zavala	26	715 ft	50–1,356	↓
Lee	23	1,260 ft	1,078–2,448	↓
Bastrop	18	1,006 ft	757–1,150	↓
Bee	16	5,780 ft	5,614–5,928	↓
Madison	13	1,634 ft	1,540–1,730	↓
Fayette	11	1,990 ft	1,195–2,812	↓
Duval	11	9,035 ft	7,822–9,529	↓
Angelina	9	2,022 ft	1,712–2,115	↓
Bexar	9	550 ft	1–550	↓
Nacogdoches	5	456 ft	233–498	↓

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.