Eagle Ford Formation

Operator-reported tops from 31,874 wells across 46 counties, median tops running 882–13,815 ft by county.

Top depth: 6,421 ft 13,150 ft

10,523 wells shown (sampled from 31,874)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Karnes	5,129	11,516 ft	10,161–12,862	↓
La Salle	4,199	8,914 ft	7,741–10,765	↓
Webb	4,049	7,180 ft	6,138–7,914	↓
De Witt	2,758	12,771 ft	12,077–13,450	↓
Webb	2,608	8,641 ft	7,258–10,610	↓
Gonzales	2,409	10,570 ft	8,079–11,726	↓
Mcmullen	2,195	10,722 ft	9,545–12,055	↓
Live Oak	1,092	11,888 ft	11,207–12,710	↓
Burleson	844	7,878 ft	7,022–9,322	↓
Frio	724	7,128 ft	5,835–8,261	↓
Caldwell	618	2,450 ft	1,898–2,675	↓
Atascosa	575	9,727 ft	7,693–10,964	↓
Zavala	542	6,211 ft	5,393–6,789	↓
Fayette	541	10,516 ft	8,144–11,888	↓
Lavaca	524	11,660 ft	10,564–12,640	↓
Wilson	467	7,734 ft	6,001–8,893	↓
Lee	461	8,264 ft	7,391–9,307	↓
Brazos	440	7,740 ft	7,171–10,405	↓
Maverick	340	2,847 ft	1,444–5,055	↓
Madison	224	8,596 ft	7,850–9,469	↓
Guadalupe	205	2,334 ft	1,865–2,641	↓
Wood	174	4,258 ft	4,100–4,474	↓
Robertson	136	6,550 ft	4,724–7,131	↓
Washington	68	10,908 ft	10,158–12,425	↓
Bee	56	12,858 ft	12,565–13,422	↓
Titus	55	2,907 ft	2,503–3,102	↓
Falls	52	882 ft	720–1,122	↓
Franklin	52	2,510 ft	2,458–2,958	↓
Cherokee	44	4,504 ft	4,188–4,581	↓
Leon	41	6,427 ft	5,152–7,227	↓
Cherokee	37	4,529 ft	4,221–5,392	↓
Bastrop	31	6,530 ft	2,342–7,188	↓
Milam	28	5,752 ft	1,886–6,165	↓
Grimes	26	10,613 ft	8,941–14,464	↓
Freestone	19	4,061 ft	3,624–5,030	↓
Houston	15	7,860 ft	5,563–8,304	↓
Shelby	14	3,200 ft	2,722–3,357	↓
Nacogdoches	14	4,822 ft	4,751–5,590	↓
Walker	13	10,582 ft	10,320–12,879	↓
Navarro	11	2,760 ft	2,675–3,005	↓
Limestone	10	3,180 ft	2,625–4,382	↓
Van Zandt	8	2,510 ft	2,314–2,902	↓
San Augustine	8	4,988 ft	4,974–5,069	↓
Medina	6	1,745 ft	1,370–2,568	↓
Tyler	6	13,815 ft	12,880–14,943	↓
Smith	6	4,723 ft	4,493–4,841	↓

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.