San Andres Formation

Operator-reported tops from 88,896 wells across 37 counties, median tops running 815–4,624 ft by county.

Depth by County

County	Wells	Median Top	Typical Range	CSV
Martin	10,433	4,481 ft	4,241–4,847	↓
Midland	8,326	4,549 ft	4,113–5,211	↓
Martin	7,024	4,211 ft	3,636–4,775	↓
Ector	6,485	4,122 ft	3,480–4,784	↓
Howard	6,345	3,072 ft	2,019–3,568	↓
Yoakum	6,234	4,564 ft	4,378–5,152	↓
Yoakum	5,369	4,549 ft	4,324–5,038	↓
Hockley	4,729	4,624 ft	3,818–4,975	↓
Upton	4,527	4,494 ft	3,788–4,950	↓
Upton	3,310	3,213 ft	2,293–3,814	↓
Howard	3,186	3,496 ft	2,193–3,990	↓
Crane	2,706	2,965 ft	2,596–3,494	↓
Scurry	2,329	1,670 ft	1,450–1,965	↓
Pecos	2,224	1,520 ft	1,200–2,285	↓
Yoakum	1,868	4,572 ft	4,002–4,994	↓
Garza	1,831	2,408 ft	1,748–3,200	↓
Mitchell	1,587	1,620 ft	1,420–1,780	↓
Dawson	1,543	4,420 ft	3,619–4,876	↓
Crockett	1,451	1,856 ft	1,265–2,494	↓
Irion	1,424	1,804 ft	1,076–2,143	↓
Terry	1,046	4,544 ft	4,300–5,230	↓
Winkler	972	3,852 ft	3,531–4,212	↓
Borden	882	3,162 ft	2,302–3,585	↓
Ward	776	3,534 ft	2,915–3,870	↓
Crosby	662	2,747 ft	2,450–2,960	↓
Sterling	531	1,976 ft	1,590–2,330	↓
Tom Green	250	830 ft	524–1,054	↓
Kent	194	1,306 ft	1,100–1,870	↓
Lubbock	172	3,384 ft	2,998–4,300	↓
Lynn	136	3,818 ft	3,106–4,422	↓
Lamb	98	3,228 ft	3,007–4,079	↓
Fisher	87	815 ft	338–1,145	↓
Hale	78	3,133 ft	2,963–3,900	↓
Throckmorton	50	900 ft	404–1,250	↓
Terrell	14	1,755 ft	1,307–2,316	↓
Schleicher	12	1,094 ft	767–1,578	↓
Motley	5	889 ft	799–1,749	↓

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.