GRAND OLD OPLIN (GRAY), District 7B, Texas
A field is the Railroad Commission's unit of geology and of regulation. Its spacing rule is what decides how many wells an acreage can hold.
Our estimate: volumes the operator filed with the Commission, valued at the EIA first-purchase price for that month. It is not a payment anyone received, and it is not a royalty. It sums the 29 leases in this field that have a page here — 76% of the register's 38 — so it understates the field.
Production, 2025
The Railroad Commission's Oil and Gas Annual Report for 2025, its most recent. These are the state's figures for the whole field, not ours.
| Wells | In the field | Producing | Produced in 2025 | Also produced | Cumulative |
|---|---|---|---|---|---|
| Oil | 11 | 9 | 13,164 bbl | 34,927 mcfcasinghead | 2,244,662 bblsince discovery |
| Gas | 0 | 0 | 0 mcf | 0 bblcondensate | 3,937 mcfsince 1970 |
The discovery well's oil measured 45.0° API gravity, perforated at 3,920 ft.
Spacing rule
What the Commission requires of a well on this field.
| Wells | Rule | Effective | From the lease line | Between wells | Acres per unit | Max diagonal |
|---|---|---|---|---|---|---|
| Oil | B | 1984-12-01 | 330 ft | 660 ft | 40 | 2,100 ft |
| Gas | B | 1987-04-27 | 330 ft | 660 ft | 10 | 0 ft |
Commission remarks: JUNE 14, 1993 COMMISSION SET UP AS AN ASSOCIATED 49(B) FIELD
County
Leases in this field
Every lease here files this field's number with the Commission and has a page on this site.
Field number 36353400, from the Railroad Commission's field register. The register's own index resolves 38 leases and 118 wells to this field by name, over every lease in Texas rather than only those with a page here. It resolves a lease by NAME and refuses an ambiguous one, so it counts nothing for a field that shares its name with another — which is why the lease count above comes from the field number instead.