TOM OCONNOR (4200), 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.

Leases
66
with a page here
Operators
5
Value, all time
$42.2 M
92% of the register's 72
Discovered
1976-03-31
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 66 leases in this field that have a page here — 92% of the register's 72 — 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.

WellsIn the fieldProducingProduced in 2025Also producedCumulative
Gas3300 mcf0 bblcondensate19,922,854 mcfsince 1970

This field filed no production for 2025. It remains on the Commission's schedules.

Spacing rule

What the Commission requires of a well on this field.

WellsRuleEffectiveFrom the lease lineBetween wellsAcres per unitMax diagonal
GasB2005-05-10150 ft300 ft100 ft

Commission remarks: AND FIELD CLASSIFIED AS SALVAGE.

County

Leases in this field

Every lease here files this field's number with the Commission and has a page on this site.

LeaseOperatorValue
HEARD, FANNIE V. W. MRS.HILCORP ENERGY COMPANY$4.0 M
O'CONNOR, THOMAS -C-HILCORP ENERGY COMPANY$2.6 M
LAMBERT, M. F.HILCORP ENERGY COMPANY$2.5 M
HEARD, FANNIE V. W. MRS.HILCORP ENERGY COMPANY$2.2 M
LAMBERT, M. F.HILCORP ENERGY COMPANY$2.1 M
COPANO GAS UNITT - C OIL COMPANY$2.0 M
HEARD, CLAUDE E. ET ALHILCORP ENERGY COMPANY$1.8 M
WILLIAMS, MAUDE ET AL "A"HILCORP ENERGY COMPANY$1.7 M
HEARD, FANNIE V. W. MRS.HILCORP ENERGY COMPANY$1.6 M
O'CONNOR, THOMAS -A-HILCORP ENERGY COMPANY$1.5 M
WILLIAMS, MAUDE ET AL 'B'HILCORP ENERGY COMPANY$1.4 M
O'CONNOR, THOMAS "C"HILCORP ENERGY COMPANY$1.4 M
O'CONNOR, THOMAS 'C'HILCORP ENERGY COMPANY$1.3 M
OCONNOR, THOMAS -A-HILCORP ENERGY COMPANY$1.0 M
HEARD, CLEMENTHILCORP ENERGY COMPANY$991 k
O'CONNOR, THOMAS "C"HILCORP ENERGY COMPANY$857 k
HEARD, CLAUDEHILCORP ENERGY COMPANY$817 k
WILLIAMS, MAUDE ET AL "B"HILCORP ENERGY COMPANY$786 k
HEARD, FANNIE V.W. MRS.HILCORP ENERGY COMPANY$753 k
HEARD, CLAUDE E. , ET ALHILCORP ENERGY COMPANY$725 k
O'CONNOR, THOMAS "C"HILCORP ENERGY COMPANY$707 k
HEARD, MRS. FANNIE V. W.HILCORP ENERGY COMPANY$703 k
COPANO GAS UNITT - C OIL COMPANY$660 k
O'CONNOR, THOMAS -D-T - C OIL COMPANY$598 k
HEARD, FANNIE V.W. MRS.HILCORP ENERGY COMPANY$551 k
WILLIAMS, MAUDE ET AL -A-HILCORP ENERGY COMPANY$534 k
HEARD, CLEMENTHILCORP ENERGY COMPANY$523 k
CLEMENT HEARDHILCORP ENERGY COMPANY$514 k
WILLIAMS, MAUDE ET AL -A-HILCORP ENERGY COMPANY$496 k
O'CONNOR, THOMAS 'C'HILCORP ENERGY COMPANY$441 k
HEARD, FANNIE, V. W. MRS.HILCORP ENERGY COMPANY$422 k
O'CONNOR, THOMAS "C"HILCORP ENERGY COMPANY$384 k
HEARD, FANNIE V. W. MRS.HILCORP ENERGY COMPANY$361 k
REILLY, ANNIEHILCORP ENERGY COMPANY$342 k
O'CONNOR, THOMAS "A"HILCORP ENERGY COMPANY$333 k
HEARD, FANNIE V.W. MRS.HILCORP ENERGY COMPANY$291 k
O'CONNOR, THOMAS -A-HILCORP ENERGY COMPANY$253 k
HEARD, FANNIE V. W., MRS.HILCORP ENERGY COMPANY$227 k
HEARD, IRA "A"HILCORP ENERGY COMPANY$223 k
BAUER, MARY CLAIRE ET VIRHILCORP ENERGY COMPANY$191 k
THOMAS O'CONNOR -E-T-C OIL COMPANY, LLC$151 k
HEARD, CLEMENTHILCORP ENERGY COMPANY$147 k
O'CONNOR, THOMAS "A"QUINTANA PET. CORP.$142 k
WILLIAMS, MAUDE ET AL 'A'HILCORP ENERGY COMPANY$139 k
COPANO GAS UNITT - C OIL COMPANY$114 k
WILLIAMS, MAUDE ET AL 'A'HILCORP ENERGY COMPANY$112 k
LAMBERT, M. F.HILCORP ENERGY COMPANY$68 k
OCONNOR, THOMAS -D-T - C OIL COMPANY$67 k
COPANO GAS UNITT - C OIL COMPANY$63 k
HEARD, IRA 'A'HILCORP ENERGY COMPANY$62 k
WILLIAMS, MAUDE ET AL "C"QUINTANA PET. CORP.$55 k
HEARD, FANNIE V. W. MRS.HILCORP ENERGY COMPANY$41 k
WILLIAMS, MAUDE ET AL -A-HILCORP ENERGY COMPANY$40 k
HEARD, CLAUDE E. ET ALHILCORP ENERGY COMPANY$36 k
O'CONNOR, THOMAS "C"HILCORP ENERGY COMPANY$36 k
LAMBERT GAS UNITHILCORP ENERGY COMPANY$24 k
WILLIAMS, MAUDE ET AL -B-HILCORP ENERGY COMPANY$18 k
BAUER, CLAIRE MARY ET VIRHILCORP ENERGY COMPANY$5 k
LAMBERT GAS UNITHILCORP ENERGY COMPANY$5 k
WILLIAMS, MAUDE ET AL -A-HILCORP ENERGY COMPANY$2 k
MRS. FANNIE V. W. HEARDHILCORP ENERGY COMPANY$2 k
LAMBERT, M.F.HILCORP ENERGY COMPANY$1 k
O'CONNOR, THOMAS "C"HILCORP ENERGY COMPANY$420
COPANO GAS UNITT-C OIL COMPANY, LLC$72
COPANO GAS UNITCOPANO GAS UNIT
COPANO GAS UNITT - C OIL COMPANY

Field number 90534315, from the Railroad Commission's field register. The register's own index resolves 72 leases and 72 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.