Ellenburger Formation

Operator-reported tops from 7,470 wells across 83 counties, median tops running 1,282–21,000 ft by county.

Top depth: 3,744 ft 13,328 ft

420 wells shown (sampled from 7,470)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Nolan	384	6,500 ft	5,888–7,116	↓
Andrews	342	12,156 ft	8,551–13,490	↓
Crockett	333	8,190 ft	6,831–11,291	↓
Jack	286	5,924 ft	5,457–6,370	↓
Callahan	272	4,173 ft	3,968–4,522	↓
Ector	253	9,670 ft	8,192–13,076	↓
Garza	252	8,297 ft	7,780–8,749	↓
Pecos	209	9,614 ft	4,600–20,988	↓
Eastland	189	3,962 ft	3,435–4,142	↓
Runnels	179	4,522 ft	4,302–4,720	↓
Shackelford	176	4,350 ft	4,072–5,104	↓
Stephens	175	4,631 ft	4,086–5,167	↓
Brown	173	2,642 ft	2,300–3,349	↓
Coleman	173	4,250 ft	3,010–4,459	↓
Stephens	167	4,260 ft	4,102–4,474	↓
Upton	161	11,901 ft	9,682–12,989	↓
Cooke	157	1,975 ft	1,320–7,105	↓
Winkler	156	10,410 ft	9,042–12,493	↓
Clay	153	6,265 ft	5,912–6,528	↓
Borden	139	8,610 ft	8,310–9,743	↓
Reagan	132	9,919 ft	8,579–11,583	↓
Edwards	128	6,939 ft	5,700–10,801	↓
Schleicher	127	7,845 ft	6,651–8,418	↓
Johnson	123	7,302 ft	6,619–8,574	↓
Crane	117	6,560 ft	5,675–11,808	↓
Wilbarger	116	4,400 ft	2,899–6,606	↓
Archer	114	5,370 ft	5,028–5,912	↓
Montague	106	6,834 ft	2,800–8,084	↓
Parker	101	6,260 ft	5,352–6,837	↓
Coke	97	6,422 ft	5,681–7,107	↓
Glasscock	93	10,348 ft	9,637–11,138	↓
Midland	93	13,052 ft	12,493–13,319	↓
Fisher	92	6,054 ft	5,810–6,943	↓
Wichita	88	4,208 ft	3,126–4,941	↓
Mitchell	88	7,210 ft	7,118–8,162	↓
Taylor	84	5,054 ft	4,557–5,780	↓
Wise	78	7,090 ft	6,774–8,090	↓
Scurry	75	7,680 ft	7,303–8,278	↓
Irion	72	8,680 ft	7,561–9,346	↓
Jones	71	5,322 ft	5,140–5,437	↓
Tarrant	71	7,374 ft	6,970–8,213	↓
Sutton	69	7,868 ft	5,718–8,476	↓
Erath	66	4,250 ft	3,766–4,776	↓
Stonewall	62	6,216 ft	5,842–6,473	↓
Concho	59	3,625 ft	2,870–3,992	↓
Sterling	56	8,200 ft	7,735–8,950	↓
Terrell	53	13,718 ft	11,213–15,446	↓
Tom Green	50	6,900 ft	5,239–7,344	↓
Ward	47	16,085 ft	10,027–19,404	↓
Hardeman	44	8,270 ft	8,067–8,808	↓
Kent	41	7,632 ft	7,532–7,802	↓
Grayson	37	7,465 ft	4,260–10,676	↓
Hood	36	5,984 ft	5,268–6,672	↓
Comanche	33	3,164 ft	2,764–3,523	↓
Hutchinson	32	8,081 ft	6,391–9,664	↓
Martin	29	12,961 ft	11,471–13,339	↓
Menard	29	2,940 ft	2,762–3,918	↓
Howard	27	10,007 ft	8,721–10,522	↓
Reeves	27	16,949 ft	15,000–20,670	↓
Val Verde	26	13,640 ft	12,538–14,102	↓
Throckmorton	20	5,069 ft	4,779–5,571	↓
Ochiltree	18	10,879 ft	10,758–11,870	↓
Young	18	4,764 ft	4,543–5,737	↓
Denton	15	8,600 ft	5,338–9,099	↓
Moore	14	3,018 ft	2,545–5,127	↓
Lynn	14	9,386 ft	9,238–9,837	↓
Hill	13	7,984 ft	7,381–8,642	↓
Wheeler	13	11,788 ft	2,064–14,617	↓
Haskell	12	5,688 ft	5,177–5,961	↓
Hockley	11	12,155 ft	11,375–12,352	↓
Potter	10	3,200 ft	2,488–9,360	↓
Gray	10	8,985 ft	8,881–9,104	↓
Mcculloch	10	1,282 ft	797–2,100	↓
Gaines	10	13,712 ft	12,189–13,822	↓
Loving	9	21,000 ft	20,879–21,757	↓
Dawson	9	10,811 ft	10,376–12,256	↓
Hamilton	9	3,774 ft	2,854–4,572	↓
Roberts	8	10,475 ft	10,221–11,634	↓
Bosque	7	5,786 ft	5,244–6,722	↓
King	7	6,040 ft	5,920–6,223	↓
Hartley	5	7,346 ft	7,200–7,983	↓
Somervell	5	5,644 ft	5,118–6,346	↓
Hansford	5	8,295 ft	8,198–9,529	↓

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.