Chester Formation

Operator-reported tops from 935 wells across 18 counties, median tops running 4,519–15,932 ft by county.

Top depth: 7,452 ft 10,703 ft

25 wells shown (sampled from 935)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Ochiltree	221	8,456 ft	7,939–9,664	↓
Hardeman	192	7,942 ft	7,647–8,252	↓
Lipscomb	190	9,788 ft	8,922–11,796	↓
Roberts	80	9,726 ft	8,595–11,220	↓
Hansford	54	7,474 ft	7,103–8,198	↓
Shackelford	31	4,519 ft	4,284–4,726	↓
Sherman	28	6,833 ft	6,030–6,869	↓
Throckmorton	25	4,804 ft	4,576–5,062	↓
Hutchinson	18	7,180 ft	6,354–8,299	↓
Wilbarger	17	7,838 ft	7,210–7,930	↓
Hemphill	17	13,118 ft	11,388–15,721	↓
Martin	15	10,086 ft	10,025–11,149	↓
Gaines	12	11,709 ft	10,450–12,165	↓
Dawson	9	10,764 ft	9,987–11,191	↓
Howard	7	9,803 ft	9,644–9,969	↓
Wheeler	7	15,932 ft	13,762–16,772	↓
Young	6	4,602 ft	4,518–4,648	↓
Baylor	6	5,258 ft	5,229–5,316	↓

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.