JO-MILL (SPRABERRY), District 8A, 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
61
with a page here
Operators
29
Value, all time
$3.16 bn
59% of the register's 104
Discovered
1954-02-01
Oil

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 61 leases in this field that have a page here — 59% of the register's 104 — 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
Oil707289882,242 bbl218,812 mcfcasinghead144,429,934 bblsince discovery

The discovery well's oil measured 39.0° API gravity, perforated at 7,105 ft.

Hydrogen sulphide

Spacing rule

What the Commission requires of a well on this field.

WellsRuleEffectiveFrom the lease lineBetween wellsAcres per unitMax diagonal
OilB2014-04-22330 ft0 ft803,200 ft
OilO2014-04-22330 ft0 ft402,100 ft

Commission remarks: REQUIRED.

County

Leases in this field

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

LeaseOperatorValue
JO-MILL UNITJO MILL OIL COMPANY LLC$2.28 bn
WEST JO-MILL UNITJO MILL OIL COMPANY LLC$345.7 M
CANON RANCH UNITNEW HEIGHT ENERGY, LLC$203.0 M
GOOD, T. J. "A"APACHE CORPORATION$98.6 M
CANON "28"NEW HEIGHT ENERGY, LLC$21.0 M
BIG BIRDROCK FISH OPERATING LLC$19.6 M
ERNIEROCK FISH OPERATING LLC$16.9 M
JO-MILL WEST UNITESTANCIA OIL & GAS, LLC$15.8 M
SCHOOLERHGN OPERATING I, LLC$14.3 M
CANON WHATLEY "25"SURGE OPERATING, LLC$13.9 M
FULKERSON "A"HGN OPERATING I, LLC$12.9 M
CANON "36"SURGE OPERATING, LLC$12.7 M
GOOD "36"YUKON EXPLORATION OPERATING, LLC$12.1 M
GOOD, T. J. "38"YUKON EXPLORATION OPERATING, LLC$8.2 M
CANON, C. C. "A"V-F PETROLEUM INC.$7.6 M
EVERETT 7PIE OPERATING, LLC$7.4 M
LUCKY STRIKE UNIT A 31-42SURGE OPERATING, LLC$5.9 M
CANON-WHATLEY "37"SURGE OPERATING, LLC$4.7 M
JACKSONPIE OPERATING, LLC$4.1 M
HULLPIE OPERATING, LLC$3.9 M
CANON-WHATLEY "24"SURGE OPERATING, LLC$3.7 M
STEWARTBYRD OPERATING COMPANY$3.4 M
MCLENDON 47EXTEX OPERATING COMPANY$3.3 M
SCHOOLERESTANCIA OIL & GAS, LLC$3.1 M
BLAGRAVEAPACHE CORPORATION$3.1 M
GRAVESLPR ENERGY, LLC$3.0 M
GIBSON-STEWARTESTANCIA OIL & GAS, LLC$2.6 M
GOODSON, J. O.ESTANCIA OIL & GAS, LLC$2.5 M
LIVESTOCK 18PIE OPERATING, LLC$2.1 M
CLAYTON, JERRY B. "B"BAYLOR OPERATING, LLC$2.0 M
W. D. EVERETTPIE OPERATING, LLC$1.9 M
WHATLEY, E. S.NEW HEIGHT ENERGY, LLC$1.8 M
CANON '27'NEW HEIGHT ENERGY, LLC$1.7 M
STEWARTESTANCIA OIL & GAS, LLC$866 k
GOOD, T. J. "37"PLATINUM EXPLORATION INC.$803 k
CANON-WHATLEYMIDLAND TMG INC.$799 k
GOOD, T. J. A1APACHE CORPORATION$715 k
CLAYTON & JOHNSONBROWN, H.L. OPERATING, L.L.C.$692 k
CANON-WHATLEY '25'POGO PANHANDLE 2004, L.P.$516 k
CANON 24QP, INC.$515 k
GUNSMOKE 31YUKON EXPLORATION OPERATING, LLC$459 k
GOOD, T. J. '36'YUKON EXPLORATION OPERATING, LLC$457 k
CANON 33NEW HEIGHT ENERGY, LLC$439 k
LIVESTOCK 7PIE OPERATING, LLC$425 k
LOVE, W. E.HGN OPERATING I, LLC$380 k
AUGUSTA "26"ATX OPERATING COMPANY, INC.$375 k
PALISADES 35ATX OPERATING COMPANY, INC.$318 k
CANONTEXAS MINERAL GROUP$305 k
BEAVER VALLEY RANCH 5PIE OPERATING, LLC$303 k
BERTE.G.L. RESOURCES, INC.$268 k
CONUNDRUM 34ATX OPERATING COMPANY, INC.$213 k
CANONENDEAVOR ENERGY RESOURCES L.P.$169 k
STEWARTSSC, INC.$142 k
YOUNGBLOOD "30"ENSERCH EXPLORATION, INC$87 k
CANON-WHATLEY "48"TAURUS EXPLORATION U.S.A., INC.$84 k
STEWARTH & O OPERATING CO$80 k
GOODSONCOX, JOHN L.$55 k
LOVE, W. E. "B"HGN OPERATING I, LLC$14 k
STEWART "R"LANDRETH, ROBERT E.$10 k
LIVESTOCK 18-2PIE OPERATING, LLC$8 k
LOVE, W. E. "A"HGN OPERATING I, LLC$2 k

Field number 46564750, from the Railroad Commission's field register. The register's own index resolves 104 leases and 1,035 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.