Defiance County, Ohio Wells Summary
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Total wells
Drill activity
Defiance County contains 68 wells on file, with top operators including GRAHAM MICHAELIS CORP and PETRO UNION INC.
Most recent well on record: Z.T.B. 1-3, operated by GRAHAM MICHAELIS CORP — last updated March 2026.
Active drilling rigs · Baker Hughes snapshot, week of 2026-07-02
By basin
- 11 Utica
Drilling for
- 10 Gas
- 1 Oil
Defiance County well density
Every dot is one well — small blue dots are historic wells;
larger orange dots are wells with activity in the last 60 days.
68 wells plotted ·
0 active in last 60 days
Basemap © OpenStreetMap contributors · well data © Oil and Gas Information · tiles served by DynamoMap
Top Operators in Defiance County by total wells
Operators: Graham Michaelis Corp, Petro Union Inc, Range Resources-Appalachia Llc, Turner Petroleum Corp, White W E Inc.
Top Counties in Ohio most active by total wells
Compare Defiance against the other busiest counties in Ohio:
Recent wells
| Well Name | Last activity | Updates | Operator | API |
|---|---|---|---|---|
| Z.T.B. 1-3 | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200400000 | |
| MILLER | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200420000 | |
| Z. T. B. | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200430000 | |
| HEILMAN | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200450000 | |
| HARDY 1-34 | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200460000 | |
| LOVE | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200470000 | |
| RITTENHOUSE | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200480000 | |
| WEBB | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200490000 | |
| HARDY | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200500000 | |
| KIME | 2026-03-18 | GRAHAM MICHAELIS CORP | 34039200510000 |
Surface Ownership Records:
