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.
Leases
75
with a page here
Operators
33
Value, all time
$7.07 bn
66% of the register's 114
Discovered
1941-12-31
Oil and gas
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 75 leases in this field that have a page here — 66% of the register's 114 — 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
2,101
818
2,077,571 bbl
490,452 mcfcasinghead
648,427,726 bblsince discovery
Gas
1
1
872 mcf
0 bblcondensate
872 mcfsince 1970
The discovery well's oil measured 30.0° API gravity, perforated at 2,900 ft.
Hydrogen sulphide
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
—
330 ft
660 ft
10
1,500 ft
Commission remarks: WAS STATED AS THE GRAYBURG SAN ANDRES DOLOMITE AT 3000FT.
Field number 59337001, from the Railroad Commission's field register. The register's own index resolves 114 leases and 4,417 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.