HOWARD GLASSCOCK, 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

229

with a page here

Operators

Value, all time

$1.72 bn

80% of the register's 285

Discovered

1925-12-31

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 229 leases in this field that have a page here — 80% of the register's 285 — 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	0	0	0 bbl	0 mcfcasinghead	429,788,079 bblsince discovery

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

The discovery well's oil measured 26.0° API gravity, perforated at 3,200 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	2008-07-28	200 ft	400 ft	10	1,500 ft
Oil	O	2008-07-28	200 ft	400 ft	5	1,100 ft

Commission remarks: HOWARD GLASSCOCK (CONSOLIDATED), EFFECTIVE 11/22/11.

County

Howard County

Leases in this field

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

Showing the 200 largest of 229 leases, by the value we compute. Every one of them is in the sitemap.

Lease	Operator	Value
GLASSCOCK, HOWARD W. (G-S) UNIT	SHERIDAN PRODUCTION COMPANY, LLC	$176.9 M
ROBERTS, DORA, B. D. & E.	SHERIDAN PRODUCTION COMPANY, LLC	$171.6 M
SETTLES, W. R. -A-	CONOCOPHILLIPS COMPANY	$107.8 M
KLOH	APACHE CORPORATION	$82.8 M
KLOH	CIMAREX ENERGY CO. OF COLORADO	$76.6 M
ROBERTS, DORA	SHERIDAN PRODUCTION COMPANY, LLC	$67.5 M
KLOH ETAL	APACHE CORPORATION	$58.3 M
HOWARD GLASSCOCK EAST UNIT	APACHE CORPORATION	$56.1 M
OVERTON, B.	CONOCOPHILLIPS COMPANY	$55.3 M
SETTLES, W. R.	CONOCOPHILLIPS COMPANY	$51.5 M
SETTLES,W.R.	ENDEAVOR ENERGY RESOURCES L.P.	$49.4 M
SETTLES-YATES UNIT	CONOCOPHILLIPS COMPANY	$38.0 M
CLAY	CIMAREX ENERGY CO. OF COLORADO	$37.7 M
SETTLES, W. R.	SHERIDAN PRODUCTION COMPANY, LLC	$32.6 M
CHALK-DUNCAN	CONOCOPHILLIPS COMPANY	$29.5 M
EASON, S. T.	CONOCOPHILLIPS COMPANY	$28.9 M
CLAY, H. R.	ENDEAVOR ENERGY RESOURCES L.P.	$28.5 M
KLOH -A-	SHERIDAN PRODUCTION COMPANY, LLC	$23.4 M
WARDER	SHERIDAN PRODUCTION COMPANY, LLC	$23.1 M
ROBERTS, DORA	APACHE CORPORATION	$22.5 M
ROBERTS, DORA	CONOCOPHILLIPS COMPANY	$22.4 M
PHILLIPS	CIMAREX ENERGY CO. OF COLORADO	$20.1 M
CLAY, H. R. -E-	QUANTUM RESOURCES MANAGEMENT,LLC	$18.5 M
CHALK	LEGACY RESERVES OPERATING LP	$17.8 M
KLOH-RUMSEY	LEGACY RESERVES OPERATING LP	$17.7 M
CHALK, OTIS	TRADITION RESOURCES OPER, LLC	$13.6 M
DOUTHIT UNIT	ENDEAVOR ENERGY RESOURCES L.P.	$12.9 M
CHALK -A-	CIMAREX ENERGY CO. OF COLORADO	$10.0 M
CHALK, OTIS /EO/	CIMAREX ENERGY CO. OF COLORADO	$9.4 M
CHALK, G. O. -G-	CONOCOPHILLIPS COMPANY	$8.8 M
CLAY, H. R.	WASH, ROBERT C. INC.	$8.4 M
CHALK, G. O.	CIMAREX ENERGY CO. OF COLORADO	$8.3 M
DOUTHIT	CONOCOPHILLIPS COMPANY	$8.0 M
SETTLES, W. R. -A-	WASH, ROBERT C. INC.	$7.7 M
OVERTON, B. -A-	CONOCOPHILLIPS COMPANY	$7.7 M
CHALK, MARY	CONOCOPHILLIPS COMPANY	$7.6 M
PHILLIPS, H.	APACHE CORPORATION	$7.5 M
ROBERTS, DORA	APACHE CORPORATION	$7.4 M
CLAY, H. R. -A-	QUANTUM RESOURCES MANAGEMENT,LLC	$7.2 M
CHALK, G. O. -E-	CONOCOPHILLIPS COMPANY	$6.9 M
M. M. EDWARDS	MGM OIL & GAS COMPANY	$6.7 M
STEWART YATES SAND UNIT	WASH, ROBERT C. INC.	$6.2 M
SETTLES -A- & -B-	SHERIDAN PRODUCTION COMPANY, LLC	$6.1 M
HYMAN, SARAH	CONOCOPHILLIPS COMPANY	$6.1 M
CHALK	MIRANDA ENERGY CORPORATION	$6.0 M
CHALK, OTIS	SAHARA OPERATING COMPANY	$6.0 M
ROBERTS, DORA, -A-	SHERIDAN PRODUCTION COMPANY, LLC	$6.0 M
OWEN-CHALK	CONOCOPHILLIPS COMPANY	$5.6 M
CLAY, H. R. -C-	BREITBURN OPERATING L.P.	$5.6 M
CLAY, H. R. -A-	ROBERTSON RESOURCES, INC.	$5.5 M
HALL	MGM OIL & GAS COMPANY	$5.5 M
SETTLES	WASH, ROBERT C. INC.	$5.3 M
CHALK, SLOAN	CONOCOPHILLIPS COMPANY	$5.2 M
ROBERTS, DORA YATES WATERFLOOD	APACHE CORPORATION	$5.2 M
DOUTHIT, E. W., -B- DE	MERIT ENERGY COMPANY	$5.0 M
SETTLES -D-	SHERIDAN PRODUCTION COMPANY, LLC	$4.7 M
CLAY, H. R. -A-	WASH, ROBERT C. INC.	$4.5 M
KLOH, A.	LEGACY RESERVES OPERATING LP	$4.3 M
ROBERTS, DORA, -E-	WASH, ROBERT C. INC.	$4.2 M
GILBREATH, S.	APACHE CORPORATION	$4.1 M
CLAY, H. R. -B- AMOCO	QUANTUM RESOURCES MANAGEMENT,LLC	$4.1 M
DOUTHIT, E. W., -C- DE	MERIT ENERGY COMPANY	$4.0 M
REED"A"	ENDEAVOR ENERGY RESOURCES L.P.	$4.0 M
SETTLES, W. R. -B-	CONOCOPHILLIPS COMPANY	$4.0 M
BOWEN, JOHN	LEGACY RESERVES OPERATING LP	$3.9 M
EDWARDS -C-	ASHBROOK OIL CO.	$3.9 M
SETTLES, W. R. -A-	TAYLOR TWO ENERGY, LLC	$3.7 M
REED, W. N. & L. R.	CONOCOPHILLIPS COMPANY	$3.7 M
REED BROTHERS DE	MERIT ENERGY COMPANY	$3.5 M
SETTLES, W. R. -C-	CONOCOPHILLIPS COMPANY	$3.5 M
CHALK, G. O. -D-	CONOCOPHILLIPS COMPANY	$3.2 M
ABRAMS	APACHE CORPORATION	$3.2 M
STEWART, G. C.	APACHE CORPORATION	$3.1 M
HOOKS	MOSS PETROLEUM COMPANY	$3.0 M
SETTLES -A-	LEGACY RESERVES OPERATING LP	$3.0 M
SCOTT, R. C.	MARATHON OIL COMPANY	$3.0 M
CHALK "A"	LEGACY RESERVES OPERATING LP	$2.9 M
STEWART, G. C.	LEGACY RESERVES OPERATING LP	$2.9 M
REED, L. R. & W. N.	MERIT ENERGY COMPANY	$2.8 M
CHALK, OTIS	KEELEY OIL, L.L.C.	$2.7 M
BATJER, PATTI -B-	ENDEAVOR ENERGY RESOURCES L.P.	$2.7 M
TURNER, SAM	RICHMOND DRILLING COMPANY, INC.	$2.6 M
CLAY, H. R. -B-	ROBERTSON RESOURCES, INC.	$2.5 M
CHALK ESTATE	CONOCOPHILLIPS COMPANY	$2.4 M
CHALK, MARY	LEGACY RESERVES OPERATING LP	$2.3 M
HYMAN-CHALK	CONOCOPHILLIPS COMPANY	$2.2 M
CHALK -B- DUNCAN	CONOCOPHILLIPS COMPANY	$2.2 M
EDWARDS	CORONADO MINERALS, LLC	$2.1 M
SETTLES -B-	SHERIDAN PRODUCTION COMPANY, LLC	$2.1 M
DOUTHIT, E. W., -A- DE	MERIT ENERGY COMPANY	$2.1 M
CLAY, H. R. -G-	QUANTUM RESOURCES MANAGEMENT,LLC	$2.0 M
CHALK, G. O.	CONOCOPHILLIPS COMPANY	$1.9 M
DOUTHIT-B 1	CONOCOPHILLIPS COMPANY	$1.9 M
TURNER, SAM	CORONADO MINERALS, LLC	$1.9 M
DOUTHIT, E. W., ETUX	WASH, ROBERT C. INC.	$1.8 M
WASH-DOUTHIT "D"	WASH, ROBERT C. INC.	$1.7 M
CHALK, OTIS	APACHE CORPORATION	$1.7 M
CLAY, H.R.-MCNALEN	QUANTUM RESOURCES MANAGEMENT,LLC	$1.6 M
REED -A-	CONOCOPHILLIPS COMPANY	$1.6 M
COOPER	MILLENNIUM RESOURCES, LP	$1.6 M
CHALK, G. O. -C-	CONOCOPHILLIPS COMPANY	$1.5 M
ROBERTS -C-	MGM OIL & GAS COMPANY	$1.5 M
DOUTHIT	RCW OIL COMPANY	$1.4 M
CHALK, G. O. -B-	CONOCOPHILLIPS COMPANY	$1.4 M
HOOKS	SOUTHWEST ROYALTIES, INC.	$1.4 M
OTIS, JOHN	LEGACY RESERVES OPERATING LP	$1.4 M
DOUTHITT	GOLDEN SPECIALTIES OIL & GAS	$1.3 M
ROBERTS, DORA -A- & -B-	5H OIL CO., LLC	$1.3 M
STEWART	TAYLOR TWO ENERGY, LLC	$1.3 M
PHILLIPS, H. O.	CORONADO MINERALS, LLC	$1.3 M
CLAY, H. R.	VISION NATURAL RESOURCES, LP	$1.3 M
CHALK, G. O. -A-	CONOCOPHILLIPS COMPANY	$1.3 M
COLE, DORIS "A"	LEGACY RESERVES OPERATING LP	$1.3 M
DORIS CHALK -C-	KEELEY OIL, L.L.C.	$1.2 M
BAKER	MGM OIL & GAS COMPANY	$1.2 M
CHALK	SAHARA OPERATING COMPANY	$1.1 M
CLAY, H. R.	WASH, ROBERT C. INC.	$1.1 M
ROBERTS, DORA	GOLDEN SPECIALTIES OIL & GAS	$1.1 M
CLAY, H. R.	O'RYAN OIL AND GAS	$1.1 M
HEUSINGER, A. R.	MARATHON OIL COMPANY	$1.1 M
ROBERTS, DORA, -B-	5H OIL CO., LLC	$1.0 M
TEX-HAN DOUTHIT /SAN ANDRES/	P4 OPERATING, LLC	$1.0 M
HYMAN, SARAH -C-	BIG D ENERGY COMPANY	$1.0 M
ST. LOUIE	SAHARA OPERATING COMPANY	$1.0 M
EASON, S. T. -A-	CONOCOPHILLIPS COMPANY	$987 k
JOHN OTIS -B-	LEGACY RESERVES OPERATING LP	$969 k
JOHN OTIS -A-	LEGACY RESERVES OPERATING LP	$966 k
BOWEN, ANNA	BIG D ENERGY COMPANY	$893 k
DOUTHIT, E. W., DE	MERIT ENERGY COMPANY	$891 k
RUMSEY, ABRAMS & FRAZIER	LEGACY RESERVES OPERATING LP	$880 k
COLE, DORIS	LEGACY RESERVES OPERATING LP	$870 k
CLAY, H. R.	BREITBURN OPERATING L.P.	$846 k
MAGNOLIA-ROBERTS	5H OIL CO., LLC	$825 k
CHALK, MARY, -BE-	LEGACY RESERVES OPERATING LP	$823 k
DOUTHIT A	SOJOURNER DRILLING CORPORATION	$808 k
MM EDWARDS BLACK	LINN OPERATING, INC.	$807 k
DOUTHIT, MARY E.	WASH, ROBERT C. INC.	$806 k
CHALK -A-	EXCEL ENERGY CO.	$804 k
SETTLES, W. R. -B-	TAYLOR TWO ENERGY, LLC	$699 k
HYMAN, SARAH	BIG D ENERGY COMPANY	$697 k
BATJER, PATTI -C-	ENDEAVOR ENERGY RESOURCES L.P.	$690 k
CLAY,H. R., -B-	O'RYAN OIL AND GAS	$687 k
CLAY, H. R. -C-	LEGACY RESERVES OPERATING LP	$640 k
ROBERTS, DORA -A-	5H OIL CO., LLC	$615 k
CHALK, MARY -C-	LEGACY RESERVES OPERATING LP	$601 k
STEWART, G. C. -B-	LEGACY RESERVES OPERATING LP	$595 k
KELLY-ROBERTS	CONOCOPHILLIPS COMPANY	$576 k
MOBIL-SCOTT, R.	MARATHON OIL COMPANY	$576 k
HOOKS	MIRANDA ENERGY CORPORATION	$574 k
ROB	SHERIDAN PRODUCTION COMPANY, LLC	$567 k
BOWEN, JOHN B. JR. -B-	CIRCLE H OIL COMPANY	$560 k
FT. WORTH NATL. BANK	5H OIL CO., LLC	$544 k
CHALK, MARY -G-	LEGACY RESERVES OPERATING LP	$538 k
BOWEN, ANNA B.	BIG D ENERGY COMPANY	$528 k
NIEMEYER	BIG D ENERGY COMPANY	$522 k
ROBERTS, DORA -E-	5H OIL CO., LLC	$520 k
COLE, DORIS "B"	LEGACY RESERVES OPERATING LP	$483 k
REED BROTHERS -A-	CONOCOPHILLIPS COMPANY	$462 k
DOUTHIT -A-	WASH, ROBERT C. INC.	$408 k
ANGUISH, E. W.	BIG D ENERGY COMPANY	$394 k
CHALK, MARY -D-	LEGACY RESERVES OPERATING LP	$394 k
ROBERTS, DORA -C-	GOLDEN SPECIALTIES OIL & GAS	$364 k
ROBERTS, DORA -B- (SOUTHLAND)	5H OIL CO., LLC	$351 k
HOOKS, A. J.	BOYD & MCWILLIAMS ENERGY GROUP	$347 k
COLLINS	B. B. & C.	$323 k
EDWARDS, W. P.	CORONADO MINERALS, LLC	$322 k
CHALK	GOLDEN SPECIALTIES OIL & GAS	$319 k
SCOTT, PRICE	MARATHON OIL COMPANY	$253 k
DOUTHIT	SOMA OPERATING COMPANY, LLC	$239 k
REED BROTHERS	CONOCOPHILLIPS COMPANY	$236 k
STEWART, G.C. "A"	LEGACY RESERVES OPERATING LP	$232 k
SCOTT, JOHN	MILLENNIUM RESOURCES, LP	$230 k
KING, CAREY	MARATHON OIL COMPANY	$229 k
FUGLAAR, I. J.	MARATHON OIL COMPANY	$200 k
CURRIE, W. B. -A-	WASH, ROBERT C. INC.	$195 k
GARRETT, HORACE	PREMIER NATURAL RESOURCES, L.P.	$164 k
PEERLESS-CHALK	SAHARA OPERATING COMPANY	$161 k
E. A. LEE -S-	CORONADO MINERALS, LLC	$161 k
SPRAGUE	5H OIL CO., LLC	$159 k
RATLIFF, R. H.	MARATHON OIL COMPANY	$151 k
HYMAN, SARAH -B-	BIG D ENERGY COMPANY	$145 k
BOWEN, JOHN -A-	MARATHON OIL COMPANY	$143 k
MM EDWARDS BLACK -A-	LINN OPERATING, INC.	$140 k
GARRETT	PARTEE DRILLING INC.	$135 k
HYMAN, SARAH MINNA	MARATHON OIL COMPANY	$124 k
STOCKTON, W. E.	MARATHON OIL COMPANY	$118 k
RACKLEY, C. B.	BIG D ENERGY COMPANY	$114 k
ROBERTS, DORA, -D-	GOLDEN SPECIALTIES OIL & GAS	$111 k
CLAY, H. R., -A-	DOUBLE EAGLE PETROLEUM CORP	$105 k
WALLACE, R.J.	MARATHON OIL COMPANY	$99 k
SPRAGUE "B"	5H OIL CO., LLC	$97 k
WALLACE, R.J. "A"	MARATHON OIL COMPANY	$97 k
PHILLIPS, HART	SHERIDAN PRODUCTION COMPANY, LLC	$90 k
EASON OIL CO.	MARATHON OIL COMPANY	$88 k
W. E. STOCKTON -C-	MARATHON OIL COMPANY	$88 k
HOOKS, A. J. -A-	BOYD & MCWILLIAMS ENERGY GROUP	$80 k
SPRAGUE -A-	5H OIL CO., LLC	$79 k
DOUTHIT "A"	SOMA OPERATING COMPANY, LLC	$74 k
HALL	LEGACY RESERVES OPERATING LP	$72 k
LEE	CORONADO MINERALS, LLC	$65 k

Field number 42971001, from the Railroad Commission's field register. The register's own index resolves 285 leases and 3,948 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.