SAND HILLS (TUBB), District 08, 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

127

with a page here

Operators

Value, all time

$2.51 bn

72% of the register's 177

Discovered

1930-12-31

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 127 leases in this field that have a page here — 72% of the register's 177 — 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	643	280	1,677,336 bbl	7,944,302 mcfcasinghead	129,565,218 bblsince discovery
Gas	20	7	38,176 mcf	1,808 bblcondensate	33,363,800 mcfsince 1970

The discovery well's oil measured 35.0° API gravity, perforated at 4,500 ft.

Hydrogen sulphide

Spacing rule

What the Commission requires of a well on this field.

Wells	Rule	Effective	From the lease line	Acres per unit	Max diagonal
Gas	B	2024-12-17	330 ft	40	0 ft
Gas	O	2024-12-17	330 ft	10	99,999 ft
Oil	B	2024-12-18	330 ft	40	99,999 ft
Oil	O	2024-12-18	330 ft	10	99,999 ft

Commission remarks: PRORATION ACRES PLATS AT THEIR OPTION

County

Crane 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
WADDELL TR A	BLACKBEARD OPERATING, LLC	$1.25 bn
MCKNIGHT, M. B.	RING ENERGY, INC.	$558.6 M
TUBB, J. B. A/C 1	FORMENTERA OPERATIONS LLC	$113.3 M
SAND HILLS TUBB UNIT	FORMENTERA OPERATIONS LLC	$110.8 M
BARNSLEY UNIT	EXTEX OPERATING COMPANY	$66.3 M
TUBB, J. B. -B-	FORMENTERA OPERATIONS LLC	$34.2 M
TUBB, J. B. -C-	FORMENTERA OPERATIONS LLC	$32.7 M
WADDELL TR I	BLACKBEARD OPERATING, LLC	$24.6 M
TUBB, J. B. -B-	RING ENERGY, INC.	$18.9 M
TUBB, J. B. -A- A/C #2	FORMENTERA OPERATIONS LLC	$18.8 M
TUBB, J. B.	LARIO OIL & GAS COMPANY	$17.7 M
TUBB, J. B. A/C 2	FORMENTERA OPERATIONS LLC	$17.5 M
STEDE BONNET N	BLACKBEARD OPERATING, LLC	$16.2 M
TUBB, J. B., ETAL	RING ENERGY, INC.	$15.1 M
TUBB, J. B. -F-	FORMENTERA OPERATIONS LLC	$14.3 M
MCKNIGHT-CROLEY	RING ENERGY, INC.	$12.1 M
HISPANIOLA	BLACKBEARD OPERATING, LLC	$10.8 M
TUBB, J. B. -D-	FORMENTERA OPERATIONS LLC	$8.7 M
TUBB -D-	CAMBRIAN MANAGEMENT, LTD.	$8.7 M
MCKNIGHT, M. B. A	BLACKBEARD OPERATING, LLC	$6.4 M
BILLY BONES	BLACKBEARD OPERATING, LLC	$6.2 M
WADDELL TR D	BLACKBEARD OPERATING, LLC	$5.4 M
STEDE BONNET NW	BLACKBEARD OPERATING, LLC	$5.4 M
LANDLUBBER N	BLACKBEARD OPERATING, LLC	$5.1 M
LANDLUBBER	BLACKBEARD OPERATING, LLC	$4.7 M
WADDELL TR I	BLACKBEARD OPERATING, LLC	$4.6 M
WADDELL TR AB 2LC	BLACKBEARD OPERATING, LLC	$4.5 M
WADDELL TR AB 2LA	BLACKBEARD OPERATING, LLC	$4.2 M
WADDELL TR A	BLACKBEARD OPERATING, LLC	$4.2 M
TUBB, J. B. "D"	FORMENTERA OPERATIONS LLC	$3.8 M
TUBB, J.B. D ACCT #2	LARIO OIL & GAS COMPANY	$3.8 M
TUBB -A- /TUBB ZONE/	MILLWEE OIL, INC.	$3.8 M
TUBB	RING ENERGY, INC.	$3.6 M
STEDE BONNET	BLACKBEARD OPERATING, LLC	$3.6 M
TUBB, J. B. -C-	SLANT OPERATING, LLC	$3.6 M
STEDE BONNET E	BLACKBEARD OPERATING, LLC	$3.5 M
TUBB, J. B. A/C 1	MILLWEE OIL, INC.	$3.2 M
TUBB, J. B. -D-	LARIO OIL & GAS COMPANY	$3.0 M
WADDELL, W. N. ET AL	BURLINGTON RES O & G CO-MIDLAND	$2.9 M
ATLANTIC STATE	MILLWEE OIL, INC.	$2.7 M
WADDELL, W. N. ETAL	BURLINGTON RES O & G CO-MIDLAND	$2.6 M
YELLOW JACK NWSW	BLACKBEARD OPERATING, LLC	$2.5 M
WADDELL TR I	BLACKBEARD OPERATING, LLC	$2.4 M
BARNSLEY, M. L.	CITATION OIL & GAS CORP.	$2.4 M
6 POUNDER SW	BLACKBEARD OPERATING, LLC	$2.4 M
TUBB	MIKE OIL LLC	$2.3 M
LANDLUBBER CE	BLACKBEARD OPERATING, LLC	$2.3 M
WADDELL TR J	BLACKBEARD OPERATING, LLC	$2.2 M
TUBB, J. B. A/C 1	FORMENTERA OPERATIONS LLC	$2.2 M
TUBB, J. B. C	FORMENTERA OPERATIONS LLC	$2.1 M
WADDELL, W. N. ET AL	BURLINGTON RES O & G CO-MIDLAND	$2.1 M
WADDELL TR B	BLACKBEARD OPERATING, LLC	$2.1 M
WADDELL, W. N. ET AL TR. I	BURLINGTON RES O & G CO-MIDLAND	$1.9 M
HAVARA	RING ENERGY, INC.	$1.9 M
TUBB, J. B. A/C 1	FORMENTERA OPERATIONS LLC	$1.8 M
TUBB, J. B. A/C 1	FORMENTERA OPERATIONS LLC	$1.6 M
TUBB, J. B. C	FORMENTERA OPERATIONS LLC	$1.6 M
JOHNSON-STATE	MILLWEE OIL, INC.	$1.6 M
WADDELL TR AD1 6L	BLACKBEARD OPERATING, LLC	$1.5 M
TUBB, J. B. -A-	RING ENERGY, INC.	$1.5 M
TUBB "10"	MILLWEE OIL, INC.	$1.5 M
M.B. MCKNIGHT 'F'	BLACKBEARD OPERATING, LLC	$1.4 M
TUBB "B"	MILLWEE OIL, INC.	$1.4 M
TUBB, J. B. -A-	VENTURE PRODUCTION SERVICE INC.	$1.4 M
BARNSLEY -D-	N & B OIL AND GAS LLC	$1.3 M
WADDELL, W. N. ET AL TR. I	BURLINGTON RES O & G CO-MIDLAND	$1.3 M
WADDELL TR AD1 7L	BLACKBEARD OPERATING, LLC	$1.2 M
MCKNIGHT, M.B.	BURNETT OIL CO., INC.	$1.1 M
YELLOW JACK E2SW	BLACKBEARD OPERATING, LLC	$1.1 M
TUBB "1"	MILLWEE OIL, INC.	$1.0 M
BARNSLEY, T. C.	MARTIN, JIMMY INC	$994 k
BUCCANEER	BLACKBEARD OPERATING, LLC	$948 k
STEDE BONNET	BLACKBEARD OPERATING, LLC	$892 k
TUBB "B"	MILLWEE OIL, INC.	$876 k
WADDELL, W. N. ET AL	BURLINGTON RES O & G CO-MIDLAND	$792 k
TUBB, J. B. "C" A/C 2	FORMENTERA OPERATIONS LLC	$789 k
MCKNIGHT 30	RING ENERGY, INC.	$723 k
TUBB, J.B. STATE	CIMAREX ENERGY CO. OF COLORADO	$716 k
TUBB, J. B. -B-AC 2	FORMENTERA OPERATIONS LLC	$660 k
TUBB, J.B.'C'A/C2	APACHE CORPORATION	$659 k
LANDLUBBER	BLACKBEARD OPERATING, LLC	$648 k
WILLIAM LARUE WELLER	BLACKBEARD OPERATING, LLC	$601 k
TUBB, J.B.	RAYDEN	$569 k
BARNSLEY -4-	EXTEX OPERATING COMPANY	$531 k
6 POUNDER SENE	BLACKBEARD OPERATING, LLC	$526 k
MCKNIGHT, M. B.	DEVON ENERGY PRODUCTION CO, L.P.	$522 k
WADDELL, W. N. ET AL TR. "C"	MERIDIAN OIL INC.-MIDLAND	$475 k
WADDELL, W. N. ET AL	BURLINGTON RES O & G CO-MIDLAND	$470 k
BARNSLEY -3-	EXTEX OPERATING COMPANY	$466 k
LANDLUBBER NE	BLACKBEARD OPERATING, LLC	$455 k
YELLOW JACK E2SW	BLACKBEARD OPERATING, LLC	$391 k
BARNSLEY, M. L.	CITATION OIL & GAS CORP.	$387 k
TUBB, J. B. -C-	EXXON MOBIL CORPORATION	$371 k
WADDELL TR I	BLACKBEARD OPERATING, LLC	$359 k
BARNSLEY, M. L.	ROBERTSON RESOURCES, INC.	$334 k
TUBB, J. B. "C"	ASPEN OPERATING COMPANY, L.L.C.	$267 k
TUBB, J. B. A/C 1	FORMENTERA OPERATIONS LLC	$215 k
TUBB, J.B. -B-	WALSH & WATTS, INC.	$193 k
BARNSLEY, M. L.	CITATION OIL & GAS CORP.	$187 k
YELLOW JACK SWSW	BLACKBEARD OPERATING, LLC	$167 k
TUBB, J. B. B	EXXON CORP.	$147 k
TUBB, J. B. -A-	MILLWEE OIL, INC.	$130 k
CLEW BAY S	BLACKBEARD OPERATING, LLC	$115 k
BARNSLEY -B-	TEXAN PETROLEUM CORPORATION	$42 k
TUBB, J. B.	LARIO OIL & GAS COMPANY	$38 k
TUBB, J. B. -A-	CHEVRON U. S. A. INC.	$33 k
BARNSLEY -B-	TOLA PRODUCTION COMPANY	$21 k
BARNSLEY -A-	MARTIN, JIMMY INC	$13 k
BARNSLEY -C-	TEXAN PETROLEUM CORPORATION	$10 k
TUBB, J. B. A/C 1	EXXON MOBIL CORPORATION	$9 k
TUBB, J. B. A/C 2	EXXON CORP.	$9 k
WADDELL TR E	BLACKBEARD OPERATING, LLC	$7 k
WADDELL, W. N. ET AL TR. I	BURLINGTON RES O & G CO-MIDLAND	$7 k
BARNSLEY -H-	BP PROD. CORP.	$6 k
WADDELL TR C	BLACKBEARD OPERATING, LLC	$6 k
TUBB, J. B. A/C 1	EXXON CORP.	$4 k
TUBB, J. B. -B-	FORMENTERA OPERATIONS LLC	$4 k
TUBB, J.B. -E-	EXXON CORP.	$3 k
BARNSLEY -E-	TOLA PRODUCTION COMPANY	$2 k
BARNSLEY -F-	LAVANCO ENERGY, INC.	$957
TUBB, J. B., -D-	MILLWEE OIL, INC.	$443
SHELL-TUBB	HAWKEYE TRANSMISSION COMPANY	$364
TERRILL, J. V. -A-	CHEVRON U. S. A. INC.	$364
BARNSLEY -G-	TOLA PRODUCTION COMPANY	$101
WADDELL, W.N. ET AL	SOUTHLAND ROYALTY CO.-MIDLAND	—
WADDELL, W. N. ET AL	SOUTHLAND ROYALTY CO.-MIDLAND	—
BARNSLEY -I-	CLARON CORPORATION	—

Field number 80473682, from the Railroad Commission's field register. The register's own index resolves 177 leases and 1,443 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.