PEARSALL (AUSTIN CHALK), District 01, 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

1,103

with a page here

Operators

313

Value, all time

$2.52 bn

55% of the register's 1,992

Discovered

1936-12-28

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 1,103 leases in this field that have a page here — 55% of the register's 1,992 — 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	329	159	592,024 bbl	513,386 mcfcasinghead	173,796,202 bblsince discovery
Gas	5	1	118,601 mcf	35,778 bblcondensate	3,547,378 mcfsince 1970

The discovery well's oil measured 34.0° API gravity, perforated at 5,200 ft.

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
Gas	B	2025-06-17	330 ft	0 ft	80	4,000 ft
Oil	B	2025-06-17	330 ft	0 ft	80	3,250 ft

Commission remarks: LEASE PLAT. PRORATION PLAT IS NOT REQUIRED.

County

Frio 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 1,103 leases, by the value we compute. Every one of them is in the sitemap.

Lease	Operator	Value
CANNAN	CML EXPLORATION, LLC	$57.7 M
STEWART	ARETE OPERATING COMPANY, LLC	$37.8 M
BUCHANAN, JOHN F. -A-	FLINT OAK ENERGY, LLC	$35.1 M
JOHNSTON RANCH	FLINT OAK ENERGY, LLC	$34.9 M
HILDEBRAND	BLACKBRUSH O & G, LLC	$34.6 M
RALLY PETROLEUM	MUELLER EXPLORATION, INC.	$33.8 M
BOWMAN 68 UNIT	TRINITY OPERATING (USG), LLC	$32.8 M
BOOTH-WEAVER	CRESCENT ENERGY OPERATING, LLC	$32.4 M
THOMPSON	CML EXPLORATION, LLC	$32.4 M
HARLAN, R. K.	TRAILBLAZER ENERGY RESOURCES,LLC	$31.8 M
BOWMAN-STANDIFER UNIT	TRINITY OPERATING (USG), LLC	$31.0 M
BOWMAN-SPEAS UNIT 67	TRINITY OPERATING (USG), LLC	$29.5 M
PICKENS RANCH	HAWTHORN ENERGY PARTNERS, LLC	$29.1 M
TORTUGA B UNIT	CRESCENT ENERGY OPERATING, LLC	$28.6 M
SHINER RANCH -B-	BLACKBRUSH O & G, LLC	$26.4 M
JOE	CML EXPLORATION, LLC	$22.8 M
PICKWILL	CML EXPLORATION, LLC	$22.3 M
HAUG-KIESCHNICK AC UNIT 33	TRINITY OPERATING (USG), LLC	$21.8 M
SHINER RANCH	TRINITY OPERATING (USG), LLC	$21.6 M
SHINER RANCH	BLACKBRUSH O & G, LLC	$20.2 M
JETERO-BOOTH	CRESCENT ENERGY OPERATING, LLC	$20.2 M
FLOWER	CML EXPLORATION, LLC	$19.9 M
THOMPSON UNIT	CML EXPLORATION, LLC	$19.6 M
BOOTH-BEELER	CRESCENT ENERGY OPERATING, LLC	$19.4 M
RICHARDSON	CML EXPLORATION, LLC	$18.8 M
SCHULZE-WATTS UNIT	TRINITY OPERATING (USG), LLC	$18.7 M
DRINKARD	CML EXPLORATION, LLC	$18.7 M
DYESS	CML EXPLORATION, LLC	$18.2 M
ELDRIDGE UNIT	SAGE ENERGY COMPANY	$17.8 M
PICKENS	CML EXPLORATION, LLC	$17.3 M
RUTH	CML EXPLORATION, LLC	$17.2 M
BOOTH UNIT	CRESCENT ENERGY OPERATING, LLC	$17.0 M
JASIK UNIT	SAGE ENERGY COMPANY	$17.0 M
CMWW	CML EXPLORATION, LLC	$16.7 M
LITTLE 179	CML EXPLORATION, LLC	$16.6 M
DIMMIT-WOOD	SAGE ENERGY COMPANY	$16.0 M
DUNKLE	CML EXPLORATION, LLC	$15.1 M
BOWMAN -A-	TRINITY OPERATING (USG), LLC	$15.0 M
GIL	CML EXPLORATION, LLC	$14.4 M
BOWMAN 82 UNIT	TRINITY OPERATING (USG), LLC	$14.3 M
MENDI	CML EXPLORATION, LLC	$14.3 M
PALS RANCH	SIEN OPERATING COMPANY, LLC	$14.2 M
AVANT, J.R.	TRINITY OPERATING (USG), LLC	$14.2 M
YARBROUGH	TRINITY OPERATING (USG), LLC	$13.8 M
BIG WELLS UNIT	DUPLANTIS ENERGY, LLC	$13.6 M
ALLEE	EXCO OPERATING COMPANY, LP	$13.5 M
HUFFMAN UNIT #1RE	CRESCENT ENERGY OPERATING, LLC	$13.2 M
HALEY, C.R.	FLINT OAK ENERGY, LLC	$13.1 M
NANCE UNIT	SAGE ENERGY COMPANY	$12.8 M
HILDEBRAND	LONESTAR OPERATING, LLC	$12.6 M
HAUG-KRUEGER AC UNIT 33	TRINITY OPERATING (USG), LLC	$12.5 M
JONES, E. B.	FLINT OAK ENERGY, LLC	$12.5 M
LEARY TRUST	CML EXPLORATION, LLC	$12.3 M
LEWTON 203	BLACKBRUSH O & G, LLC	$12.1 M
CIRCLE 'T'	CML EXPLORATION, LLC	$12.1 M
SCHULZE, WALTER J.	TRINITY OPERATING (USG), LLC	$11.9 M
DIMMIT S-4	DUPLANTIS ENERGY, LLC	$11.7 M
KINCAID	MUELLER EXPLORATION, INC.	$11.7 M
DIMMIT-WOOD UNIT	EXCO OPERATING COMPANY, LP	$11.2 M
DUNLAP	CML EXPLORATION, LLC	$11.2 M
3C UNIT	KSABE ENERGY PARTNERS, LLC	$11.2 M
PRICE, ROBERT	SAGE ENERGY COMPANY	$11.0 M
MCLEAN	CML EXPLORATION, LLC	$10.8 M
SHINER-MORALES	BLACKBRUSH O & G, LLC	$10.7 M
BOWMAN-MINX UNIT	TRINITY OPERATING (USG), LLC	$10.5 M
VOSS "C"	ALAMO OPERATING COMPANY, L. C.	$10.2 M
PANTHER HOLLOW	ORYX ENERGY COMPANY	$9.9 M
BURNS "D"	ROCC OPERATING, LLC	$9.7 M
HEITZ, B.M.	FLINT OAK ENERGY, LLC	$9.6 M
VERNA	CML EXPLORATION, LLC	$9.5 M
LASITER-WOOD ET AL UNIT	TEXAS AMERICAN RESOURCES COMPANY	$9.4 M
PFEIFFER	CML EXPLORATION, LLC	$9.3 M
BOWLES-NANCE UNIT	RED BYRD OIL, LLC	$9.3 M
JONES, E. B.	FLINT OAK ENERGY, LLC	$9.3 M
HEITZ, B. M.	HAWTHORN ENERGY PARTNERS, LLC	$9.2 M
FATHEREE	CML EXPLORATION, LLC	$9.1 M
BOWMAN-YOUNG UNIT	TRINITY OPERATING (USG), LLC	$9.0 M
BURNS -A-	LONESTAR OPERATING, LLC	$9.0 M
EVERGREEN	CML EXPLORATION, LLC	$9.0 M
HEITZ-BABCOCK UNIT	SAGE ENERGY COMPANY	$8.9 M
BRUCE WEAVER	CML EXPLORATION, LLC	$8.6 M
MOLAK	CML EXPLORATION, LLC	$8.5 M
TORTUGA-A-UNIT	CRIMSON EXPLORATION OPER., INC.	$8.3 M
KINNARD, OLGA	TRINITY OPERATING (USG), LLC	$8.2 M
THALMANN	CML EXPLORATION, LLC	$8.1 M
EARNEST, W. A.	CIBOLO ENERGY OPERATING, INC.	$8.0 M
ANNPICK	CML EXPLORATION, LLC	$8.0 M
BRUNDAGE-IVY UNIT	SAGE ENERGY COMPANY	$7.9 M
89 RANCH	JB OIL & GAS WELL SERVICE	$7.8 M
MALTSBERGER	VERDUN OIL EF II LLC	$7.8 M
SOLANSKY	CML EXPLORATION, LLC	$7.8 M
STEWART - MICHAEL UNIT	ARETE OPERATING COMPANY, LLC	$7.7 M
LOTHRINGER	TRAILBLAZER ENERGY RESOURCES,LLC	$7.7 M
MARRS MCLEAN	TRAILBLAZER ENERGY RESOURCES,LLC	$7.7 M
WINTERSHALL-GERKE UNIT "A"	FW EAGLE FORD I, LLC	$7.5 M
DIMMIT WOODS	HAWTHORN ENERGY PARTNERS, LLC	$7.4 M
BRAY	EXCO OPERATING COMPANY, LP	$7.4 M
ROBERTSON-LASITER UNIT	TEXAS AMERICAN RESOURCES COMPANY	$7.3 M
MARGUERITE	CML EXPLORATION, LLC	$7.3 M
MCKINLEY	FLINT OAK ENERGY, LLC	$7.2 M
AVANT, J. R. -B- #1	SAGE ENERGY COMPANY	$7.1 M
WATTS	TRINITY OPERATING (USG), LLC	$7.1 M
AVANT, J. R. -B-	TEXAS AMERICAN RESOURCES COMPANY	$7.1 M
BOWMAN-ANDERSON UNIT	TRINITY OPERATING (USG), LLC	$6.9 M
BOOTH	CRIMSON EXPLORATION OPER., INC.	$6.9 M
SUGARLAND	CML EXPLORATION, LLC	$6.8 M
GLASSCOCK RANCH A	TRINITY OPERATING (USG), LLC	$6.8 M
MARPICK	CML EXPLORATION, LLC	$6.7 M
W. E. STACY & SONS ET AL	VERMILLION PRODUCTION, INC.	$6.7 M
BOWMAN-GOMEZ UNIT 69	TRINITY OPERATING (USG), LLC	$6.6 M
THOMPSON	INEOS USA OIL & GAS LLC	$6.5 M
JASIK, C.	SAGE ENERGY COMPANY	$6.5 M
TROTTER	CML EXPLORATION, LLC	$6.5 M
ROBERT PRICE -A-2 UNIT	TRINITY OPERATING (USG), LLC	$6.4 M
NEAL UNIT	ARETE OPERATING COMPANY, LLC	$6.4 M
BEELER	SAGE ENERGY COMPANY	$6.3 M
SHINER RANCH -C-	BLACKBRUSH O & G, LLC	$6.3 M
ANIKEN #1	CML EXPLORATION, LLC	$6.3 M
MDB	CML EXPLORATION, LLC	$6.2 M
TORTUGA UNIT	CRESCENT ENERGY OPERATING, LLC	$6.2 M
BOWMAN 6	TRINITY OPERATING (USG), LLC	$6.2 M
OPPENHEIMER	BIGFOOT OIL LLC	$6.1 M
BOYD, G. G.	SAGE ENERGY COMPANY	$6.1 M
PEARSALL PARTNERS/GLG W.A.CARNES	BLACKBRUSH O & G, LLC	$6.0 M
BURNS "D-F-STATE UNIT	ROCC OPERATING, LLC	$5.9 M
FLYING G	CML EXPLORATION, LLC	$5.9 M
SMITH, JOEY	SILVER HILL ENERGY OPERATING LLC	$5.8 M
BOYD	TRINITY OPERATING (USG), LLC	$5.8 M
PFEIFFER-BYRD	CML EXPLORATION, LLC	$5.8 M
MCKINNEY	AMAC ENERGY, L.L.C.	$5.8 M
LA ROSITA	CML EXPLORATION, LLC	$5.8 M
DIXONDALE	CML EXPLORATION, LLC	$5.7 M
BUBBLING OVER	VERDUN OIL & GAS LLC	$5.6 M
PORTER, FLOYD R.	TRINITY OPERATING (USG), LLC	$5.6 M
TRIPLE J	CML EXPLORATION, LLC	$5.6 M
KM RANCH A ALLOCATION 4	TRINITY OPERATING (USG), LLC	$5.6 M
WAYLAND, JON S. ET AL UNIT	SAGE ENERGY COMPANY	$5.5 M
BUCKLEY, CLIFFORD ETAL	D.J.F. SERVICES, INC.	$5.4 M
BURNS RANCH	FW EAGLE FORD I, LLC	$5.4 M
PHILLIP C. JAMES ET AL UNIT	FLINT OAK ENERGY, LLC	$5.3 M
WARD-RIHA	EXCO OPERATING COMPANY, LP	$5.3 M
WEST SHINER RANCH	FIRST ROCK, INC.	$5.1 M
TLAPEK	CML EXPLORATION, LLC	$5.0 M
SHINER HEIRS	WILLIAMS, CLAYTON ENERGY, INC.	$5.0 M
BURNS "E-D STATE" UNIT	LONESTAR OPERATING, LLC	$4.9 M
STOUT	MUELLER EXPLORATION, INC.	$4.9 M
WINTERSHALL-MEINERS	ROCC OPERATING, LLC	$4.8 M
BIG KAHUNA UNIT	HAWTHORN ENERGY PARTNERS, LLC	$4.8 M
LASITER, HUBERT -A-	ORYX ENERGY COMPANY	$4.8 M
CASEY FRIO C	MOSAIC TEXAS LLC	$4.8 M
AVANT B	SAGE ENERGY COMPANY	$4.7 M
KING	C6 OPERATING, L.L.C.	$4.7 M
PRICE, ROBERT	TRINITY OPERATING (USG), LLC	$4.6 M
HUNTER, Q. O. UNIT	TEXAS AMERICAN RESOURCES COMPANY	$4.5 M
WRIGHT-AVANT "A" UNIT	CALLON (EAGLE FORD) LLC	$4.5 M
STEWART - MICHAEL 2H UNIT	ARETE OPERATING COMPANY, LLC	$4.5 M
CENIZO-ALC UNIT	STALKING HORSE ENRGY, LTD LIB CO	$4.4 M
TURMAN	TRINITY OPERATING (USG), LLC	$4.3 M
PONDER-LASITER UNIT	ORYX ENERGY COMPANY	$4.3 M
BURNS "E-D-F STATE" UNIT	ROCC OPERATING, LLC	$4.3 M
MORELAND	CML EXPLORATION, LLC	$4.3 M
LASITER, HUBERT -A-	HAWTHORN ENERGY PARTNERS, LLC	$4.3 M
STANDIFER UNIT	TRINITY OPERATING (USG), LLC	$4.3 M
HARPER RANCH	TRINITY OPERATING (USG), LLC	$4.3 M
CROSS S	CML EXPLORATION, LLC	$4.2 M
BRUNDRETT-BETCO	HAWTHORN ENERGY PARTNERS, LLC	$4.2 M
JRED B AC	ATLAS OPERATING LLC	$4.2 M
BERMUDA	CML EXPLORATION, LLC	$4.1 M
CASEY FRIO D	MOSAIC TEXAS LLC	$4.1 M
BOWMAN	CML EXPLORATION, LLC	$4.1 M
BURNS "H" UNIT	FW EAGLE FORD I, LLC	$4.0 M
KLEIMANN	CML EXPLORATION, LLC	$4.0 M
DAVIS, RUTH DAKIN	BLOCK "T" PETROLEUM, INC.	$4.0 M
CARPENTER	TRINITY OPERATING (USG), LLC	$3.9 M
CARRICO	CIBOLO ENERGY OPERATING, INC.	$3.9 M
MORO CREEK	VERDUN OIL & GAS LLC	$3.9 M
WHITLEY	FORZA OPERATING, LLC	$3.9 M
NANCE, O.N.	SAGE ENERGY COMPANY	$3.9 M
HARRIS, JULIA	BLACKBRUSH O & G, LLC	$3.9 M
JOHNSTON -A-	SILVER ROCK ENERGY, LLC	$3.9 M
ALLEN	CML EXPLORATION, LLC	$3.9 M
KEYSTONE RANCH -A-	OILFIELD CLEANTECH WATER REC LLC	$3.8 M
PFEIFFER	SAGE ENERGY COMPANY	$3.8 M
THALMANN	CML EXPLORATION, LLC	$3.8 M
BEELER	CML EXPLORATION, LLC	$3.8 M
PEARSALL PARTNERS/GLG MCDERMAND	PETRO-HUNT, L.L.C.	$3.8 M
BEELER, R. F. "C"	CIBOLO ENERGY OPERATING, INC.	$3.8 M
WRIGHT-AVANT UNIT	CALLON (EAGLE FORD) LLC	$3.7 M
WINTON UNIT	INEOS USA OIL & GAS LLC	$3.7 M
MORALES-TURNHAM UNIT	BLACKBRUSH O & G, LLC	$3.6 M
SHINER RANCH	BLACKBRUSH O & G, LLC	$3.6 M
BRYMER UNIT	KILLAM OIL CO., LTD.	$3.6 M
BLALACK ET. AL. UNIT	SAGE ENERGY COMPANY	$3.6 M
BUCKLEY, CLIFFORD ET AL	VANCO OIL & GAS CORP.	$3.5 M
WHITECOTTON UNIT	EXCO OPERATING COMPANY, LP	$3.5 M
BOND	CML EXPLORATION, LLC	$3.5 M
BUCHANAN -B- UNIT	FLINT OAK ENERGY, LLC	$3.4 M
BETTY	CML EXPLORATION, LLC	$3.4 M
TORTUGA C	CRESCENT ENERGY OPERATING, LLC	$3.3 M
YOLANDA VILLARREAL	TC OIL AND GAS, LLC	$3.3 M

Field number 69981125, from the Railroad Commission's field register. The register's own index resolves 1,992 leases and 3,388 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.