AMACKER-TIPPETT (DEVONIAN), District 7C, 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

139

with a page here

Operators

Value, all time

$1.85 bn

84% of the register's 165

Discovered

1955-09-10

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 139 leases in this field that have a page here — 84% of the register's 165 — 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	6	5	1,021 bbl	11,763 mcfcasinghead	1,203,573 bblsince discovery
Gas	113	77	1,729,322 mcf	41,078 bblcondensate	352,278,410 mcfsince 1970

The discovery well's oil measured 54.0° API gravity, perforated at 10,896 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	2003-09-01	467 ft	933 ft	40	0 ft
Gas	B	2008-02-12	467 ft	933 ft	160	0 ft
Gas	O	2008-02-12	467 ft	933 ft	40	99,999 ft

Commission remarks: PSUEDO RULES FOR HORIZONTALS

County

Upton 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
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$40.8 M
AMACKER, V.T. 61	CIVITAS PERMIAN OPERATING, LLC	$37.0 M
AMACKER, V. T. 61	CIVITAS PERMIAN OPERATING, LLC	$36.7 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$35.9 M
BLUE TOPAZ 102	EOG RESOURCES, INC.	$33.3 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$32.4 M
WINDHAM "108"	EOG RESOURCES, INC.	$31.8 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$31.1 M
V.T. AMACKER 105	CIVITAS PERMIAN OPERATING, LLC	$29.3 M
WINDHAM 108	EOG RESOURCES, INC.	$29.1 M
V. T. AMACKER 106	CIVITAS PERMIAN OPERATING, LLC	$28.2 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$28.0 M
AMACKER, V. T. 78	CIVITAS PERMIAN OPERATING, LLC	$25.9 M
BARNETT 21	EOG RESOURCES, INC.	$25.9 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$24.3 M
AMACKER, V. T. 62	CIVITAS PERMIAN OPERATING, LLC	$23.9 M
AMACKER, V. T. 78	CIVITAS PERMIAN OPERATING, LLC	$23.9 M
AMACKER "A" 88	EOG RESOURCES, INC.	$23.1 M
WINDHAM 103	EOG RESOURCES, INC.	$22.8 M
GARNET 108	EOG RESOURCES, INC.	$22.3 M
AMACKER, V. T. 79	CIVITAS PERMIAN OPERATING, LLC	$22.2 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$21.8 M
AMACKER, BARNETT	SOUTHWEST ROYALTIES, INC.	$21.5 M
AMACKER-BARNETT 21 UNIT	EOG RESOURCES, INC.	$21.3 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$20.5 M
AMACKER ALLEN 80	EOG RESOURCES, INC.	$20.3 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$20.1 M
DARBY-WILDHORSE 110 UNIT	EOG RESOURCES, INC.	$20.0 M
AMACKER, V. T. 78	CIVITAS PERMIAN OPERATING, LLC	$19.4 M
AMACKER, V. T. 61	CIVITAS PERMIAN OPERATING, LLC	$19.4 M
WEIR, GEORGE 14	EOG RESOURCES, INC.	$19.4 M
SHIRK 13	EOG RESOURCES, INC.	$19.3 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$19.1 M
SHIRK 13	EOG RESOURCES, INC.	$18.8 M
BLUE TOPAZ 102	EOG RESOURCES, INC.	$18.7 M
HALFF ESTATE "20"	EOG RESOURCES, INC.	$18.3 M
PERIDOT 101	EOG RESOURCES, INC.	$18.3 M
AMACKER, V. T. 62	CIVITAS PERMIAN OPERATING, LLC	$17.8 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$17.5 M
AMACKER ALLEN "80"	EOG RESOURCES, INC.	$17.2 M
AMACKER, V. T. 62	CIVITAS PERMIAN OPERATING, LLC	$16.9 M
HALFF ESTATE "20"	EOG RESOURCES, INC.	$16.7 M
BARNETT AMACKER	SOUTHWEST ROYALTIES, INC.	$16.6 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$16.3 M
R S WINDHAM "A"	EOG RESOURCES, INC.	$16.2 M
AMACKER-ALLEN 80	EOG RESOURCES, INC.	$16.2 M
AMACKER, V. T. 105	HUNT OIL COMPANY	$16.2 M
AMACKER, V. T. 62	CIVITAS PERMIAN OPERATING, LLC	$15.9 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$15.8 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$15.4 M
WEIR, GEORGE "14"	EOG RESOURCES, INC.	$15.3 M
BARNETT "21"	EOG RESOURCES, INC.	$15.2 M
HALFF ESTATE "20"	EOG RESOURCES, INC.	$15.1 M
AMACKER, V. T. 61	CIVITAS PERMIAN OPERATING, LLC	$15.0 M
MANN 22	EOG RESOURCES, INC.	$14.8 M
V.T. AMACKER 105	CIVITAS PERMIAN OPERATING, LLC	$14.8 M
AMACKER-BELL 99 UNIT	EOG RESOURCES, INC.	$14.7 M
BARNET-AMACKER	SOUTHWEST ROYALTIES, INC.	$14.4 M
AMACKER, V. T. 63	CIVITAS PERMIAN OPERATING, LLC	$14.3 M
MONIQUE	SUMMIT PETROLEUM LLC	$14.2 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$14.0 M
WINDHAM, R. S. "A"	EOG RESOURCES, INC.	$14.0 M
BARNETT AMACKER	SOUTHWEST ROYALTIES, INC.	$13.9 M
SAPPHIRE 102	EOG RESOURCES, INC.	$13.9 M
JADE 101	EOG RESOURCES, INC.	$13.7 M
AMACKER, V. T. 105	HUNT OIL COMPANY	$13.6 M
HALFF ESTATE "20"	EOG RESOURCES, INC.	$13.5 M
TOMADOR "99"	SUMMIT PETROLEUM LLC	$12.8 M
CODY C UNIT	EOG RESOURCES, INC.	$12.7 M
WINDHAM 103	EOG RESOURCES, INC.	$12.7 M
CODY C UNIT	EOG RESOURCES, INC.	$12.7 M
AMACKER, V.T. 79	CIVITAS PERMIAN OPERATING, LLC	$12.3 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$12.1 M
WINDHAM, R. S.	XTO ENERGY INC.	$11.9 M
AMACKER-BARNETT 21 UNIT	EOG RESOURCES, INC.	$11.9 M
WINDHAM-CLARK 103 UNIT	SOUTHWEST ROYALTIES, INC.	$11.9 M
WINDHAM, ELIZABETH	SOUTHWEST ROYALTIES, INC.	$11.7 M
AMACKER, V. T. 62	CIVITAS PERMIAN OPERATING, LLC	$11.4 M
AMACKER, V. T. 62	HUNT OIL COMPANY	$11.3 M
V.T. AMACKER 61	CIVITAS PERMIAN OPERATING, LLC	$11.2 M
CRAZY-WILDHORSE 110 UNIT	EOG RESOURCES, INC.	$10.6 M
LAURA EAVES "87"	EOG RESOURCES, INC.	$10.5 M
PERIDOT 101	EOG RESOURCES, INC.	$10.4 M
SAPPHIRE 102 UNIT	EOG RESOURCES, INC.	$10.3 M
AMACKER ALLEN "80"	EOG RESOURCES, INC.	$10.3 M
AMACKER, V. T. 105	CIVITAS PERMIAN OPERATING, LLC	$10.3 M
WINDHAM, ELIZABETH	SOUTHWEST ROYALTIES, INC.	$10.0 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$9.8 M
WINDHAM 16	EOG RESOURCES, INC.	$9.7 M
JADE 101	EOG RESOURCES, INC.	$9.4 M
AMACKER, V. T. 62	CIVITAS PERMIAN OPERATING, LLC	$8.8 M
AMACKER BELL 99 "A" UNIT	EOG RESOURCES, INC.	$8.3 M
WINDHAM, ELIZABETH A/C 3	SOUTHWEST ROYALTIES, INC.	$8.0 M
ZIRCON 100	EOG RESOURCES, INC.	$7.9 M
AMACKER "99"	EOG RESOURCES, INC.	$7.8 M
AMACKER, V. T. 62	HUNT OIL COMPANY	$7.6 M
WINDHAM, R. S. "A"	EOG RESOURCES, INC.	$7.3 M
EMILY H	SUMMIT PETROLEUM LLC	$7.3 M
AMACKER, V. T. 79	CIVITAS PERMIAN OPERATING, LLC	$7.1 M
AMACKER, V. T. "62"	CIVITAS PERMIAN OPERATING, LLC	$6.8 M
WINDHAM, R. S.	XTO ENERGY INC.	$6.3 M
COWDEN "20" UNIT	EOG RESOURCES, INC.	$6.2 M
BARNET-AMACKER	SOUTHWEST ROYALTIES, INC.	$6.1 M
WINDHAM, ELIZABETH	SOUTHWEST ROYALTIES, INC.	$6.1 M
AMACKER, V. T. 62	CIVITAS PERMIAN OPERATING, LLC	$6.0 M
AMACKER, V. T. 62	HUNT OIL COMPANY	$5.9 M
WINDHAM, R. S. "A"	EOG RESOURCES, INC.	$5.7 M
LILLIE ORMAN "53"	EOG RESOURCES, INC.	$5.7 M
CODY "C" UNIT	EOG RESOURCES, INC.	$5.4 M
WINDHAM, R.S. "C"	SOUTHWEST ROYALTIES, INC.	$5.4 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$5.3 M
AMACKER, V. T. 106	HUNT OIL COMPANY	$5.3 M
JESSE FARRIS" 91" UNIT	EOG RESOURCES, INC.	$5.0 M
WEIR, GEORGE 14 B	EOG RESOURCES, INC.	$5.0 M
WINDHAM, R. S. "A"	EOG RESOURCES, INC.	$4.9 M
WINDHAM, ELIZABETH	SOUTHWEST ROYALTIES, INC.	$4.8 M
SHIRK 13 A	EOG RESOURCES, INC.	$4.4 M
AMACKER, V. T. 106	CIVITAS PERMIAN OPERATING, LLC	$4.3 M
WINDHAM, RS -B- A/C 2	SOUTHWEST ROYALTIES, INC.	$4.2 M
AMACKER, V. T. 63	HUNT OIL COMPANY	$3.7 M
AMACKER, V. T. 106	HUNT OIL COMPANY	$3.6 M
ALLEN 44	EOG RESOURCES, INC.	$3.5 M
WINDHAM, R. S. -B- A/C 2	SOUTHWEST ROYALTIES, INC.	$3.2 M
AMACKER, V. T. 79	CIVITAS PERMIAN OPERATING, LLC	$2.9 M
A-BEAR	EOG RESOURCES, INC.	$1.8 M
HALFF ESTATE	SLEDGE, H. G., INC.	$1.6 M
AMACKER, V. T. 63	CIVITAS PERMIAN OPERATING, LLC	$1.5 M
BLOXOM 47	EOG RESOURCES, INC.	$1.2 M
AMACKER "89"	EOG RESOURCES, INC.	$1.1 M
AMACKER, V. T. -E- 82	CIVITAS PERMIAN OPERATING, LLC	$900 k
JACK "89"	CONOCOPHILLIPS COMPANY	$720 k
AMACKER, V.T. 61	HUNT OIL COMPANY	$504 k
WINDHAM, ELIZABETH A/C 2	SOUTHWEST ROYALTIES, INC.	$491 k
AMACKER V.T. 63	HUNT OIL COMPANY	$408 k
LANE, J. S.	SOUTHWEST ROYALTIES, INC.	$323 k
AMACKER, V.T. 61	CIVITAS PERMIAN OPERATING, LLC	$245 k
MCELROY	ENDEAVOR ENERGY RESOURCES L.P.	$141 k
HALFF ESTATE "20"	EOG RESOURCES, INC.	$136 k
AMACKER, V. T. -106-	HUNT OIL COMPANY	$2 k

Field number 02207304, from the Railroad Commission's field register. The register's own index resolves 165 leases and 173 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.