CLARK RANCH (LOBO), District 04, 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

with a page here

Operators

Value, all time

$211.9 M

100% of the register's 34

Discovered

1990-05-25

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 34 leases in this field that have a page here — 100% of the register's 34 — 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	1,005 bblsince discovery
Gas	29	20	263,030 mcf	75 bblcondensate	61,930,419 mcfsince 1970

The discovery well's oil measured 43.8° API gravity, perforated at 6,646 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	1991-01-08	467 ft	1,200 ft	40	0 ft

Commission remarks: PRESSURE ALLOCATION.

County

Webb 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
HACHAR, D. D.	COLUMBUS ENERGY, LLC	$30.7 M
PREVOST	COLUMBUS ENERGY, LLC	$18.8 M
CLARK-HEREFORD	COLUMBUS ENERGY, LLC	$14.3 M
MARTINEZ, D. S.	COLUMBUS ENERGY, LLC	$14.2 M
CAL-MEX	COLUMBUS ENERGY, LLC	$12.1 M
MARTINEZ, D.S.	COLUMBUS ENERGY, LLC	$11.6 M
BMT	COLUMBUS ENERGY, LLC	$10.7 M
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$10.4 M
CLARK-HEREFORD	COLUMBUS ENERGY, LLC	$9.3 M
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$8.3 M
B.M.T.	COLUMBUS ENERGY, LLC	$6.6 M
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$6.6 M
BMT	COLUMBUS ENERGY, LLC	$5.9 M
RUIZ, J. M.	COLUMBUS ENERGY, LLC	$5.7 M
PREVOST	COLUMBUS ENERGY, LLC	$5.6 M
PREVOST	COLUMBUS ENERGY, LLC	$4.7 M
CLARK, N. H.	COLUMBUS ENERGY, LLC	$4.6 M
B.M.T.	COLUMBUS ENERGY, LLC	$4.6 M
B.M.T.	COLUMBUS ENERGY, LLC	$4.1 M
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$3.9 M
CLARK, N.H.	COLUMBUS ENERGY, LLC	$3.1 M
CLARK, N. H.	COLUMBUS ENERGY, LLC	$2.9 M
RANCHO BLANCO	COLUMBUS ENERGY, LLC	$2.8 M
CLARK, N. H.	COLUMBUS ENERGY, LLC	$2.4 M
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$1.9 M
PREVOST, P.	CHEVRON U. S. A. INC.	$1.3 M
PREVOST	COLUMBUS ENERGY, LLC	$1.2 M
HACHAR, D. D.	COLUMBUS ENERGY, LLC	$1.2 M
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$793 k
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$727 k
CLARK-HEREFORD	COLUMBUS ENERGY, LLC	$391 k
HACHAR, D. D.	COLUMBUS ENERGY, LLC	$304 k
HACHAR, D.D.	COLUMBUS ENERGY, LLC	$152 k
RANCHO BLANCO "D"	COLUMBUS ENERGY, LLC	$100 k

Field number 18612300, from the Railroad Commission's field register. The register's own index resolves 34 leases and 34 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.