TOM O'CONNOR (5770 U, SOUTH), District 02, 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 4 leases in this field that have a page here — 100% of the register's 4 — 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 | 14 | 8 | 5,681 bbl | 496 mcfcasinghead | 811,044 bblsince discovery |
| Gas | 1 | 1 | 82 mcf | 0 bblcondensate | 451 mcfsince 1970 |
The discovery well's oil measured 38.0° API gravity, perforated at 5,848 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 | 1990-05-01 | 466 ft | 800 ft | 40 | 2,100 ft |
| Oil | O | 1990-05-01 | 466 ft | 800 ft | 20 | 1,500 ft |
Commission remarks: OPTIONAL 20 AC UNITS WITH 1500' DIAGONAL
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 |
|---|---|---|
| O'CONNOR, THOMAS "A" | HILCORP ENERGY COMPANY | $22.6 M |
| O'CONNOR, THOMAS "C" | QUINTANA PET. CORP. | $170 k |
| O'CONNOR, THOMAS -C- | HILCORP ENERGY COMPANY | $15 k |
| LAMBERT, M.F. | HILCORP ENERGY COMPANY | $3 k |
Field number 90534840, from the Railroad Commission's field register. The register's own index resolves 4 leases and 31 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.