ARROYO GRANDE, W. (COOK MT.), District 04, 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 11 leases in this field that have a page here — 100% of the register's 11 — 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 | 2 | 2 | 0 bbl | 0 mcfcasinghead | 918 bblsince discovery |
| Gas | 5 | 2 | 23,916 mcf | 94 bblcondensate | 2,766,524 mcfsince 1970 |
The discovery well's oil measured 44.0° API gravity, perforated at 2,870 ft.
Spacing rule
What the Commission requires of a well on this field.
Commission remarks: AOF-1 AND AOF-2 EFFECTIVE 07/01/2003.
County
Leases in this field
Every lease here files this field's number with the Commission and has a page on this site.
| Lease | Operator | Value |
|---|---|---|
| MARGO "A" | STARR OPERATING, LLC | $5.0 M |
| MARGO "A" | STARR OPERATING, LLC | $3.1 M |
| MARGO "A" | STARR OPERATING, LLC | $2.2 M |
| MARGO | NEWGULF PETROLEUM, LLC | $2.0 M |
| MARGO | NEWGULF PETROLEUM, LLC | $1.4 M |
| MARGO "A" | STARR OPERATING, LLC | $1.1 M |
| 3 M | STARR OPERATING, LLC | $619 k |
| MARGO | NEWGULF PETROLEUM, LLC | $385 k |
| HASTINGS-LOPEZ | VISION OIL AND GAS LLC | $125 k |
| MARGO | STARR OPERATING, LLC | $68 k |
| MARGO "A" | STARR OPERATING, LLC | $5 k |
Field number 03944240, from the Railroad Commission's field register. The register's own index resolves 11 leases and 11 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.