Texas oil lease

Producing

DUVAL CO. RANCH CO.-STATE -L-

Name: DUVAL CO. RANCH CO.-STATE -L- monthly oil and gas production, Duval County, Texas
Creator: Texas Railroad Commission

Duval Co. Ranch Co.-State -L- is an oil lease in Duval County, Texas, operated by Caribbean Energy LLC II in the Colmena field.

36 wells

980bbl oil, last 12 months+21% vs prior year

Operator: Caribbean Energy LLC II
County: Duval County
Field: Colmena
RRC lease: 04-00557

Is your check right?

Check my statement

Where it sits

This county

Duval County

Oil in Jul 2026: 131 bbl
Reporting since: Jan 2020

Checks stopped on this lease?

Operator
Operator changed: Caribbean Energy LLC II took over from Rattlesnake Operating Co, LLC in Sep 2025.

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

See why checks stop on this lease

Production by month

Oil output rose 21% over the last 12 months

Oil (bars)
Last 12 months

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

No gas disposition reported for this lease

The operator has not reported where the gas went in the months we hold.

Who has run this lease

The operator changed 2 times, most recently in Sep 2025

Caribbean Energy LLC II Sep 2025 to now
Rattlesnake Operating Co, LLC Jun 2020 to Aug 2025
Black Bayou Operating, LLC Jan 2020 to May 2020

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

36 wells on this lease

Wells on DUVAL CO. RANCH CO.-STATE -L-
API number	Well no.	Status
42-131-05162	1	Active
42-131-06257	3	Active
42-131-06258	4	Active
42-131-06259	5	Active
42-131-06263	9	Shut-in
42-131-06268	14	Active
42-131-06272	18	Active
42-131-06273	19	Shut-in
42-131-06276	22	Active
42-131-06279	25	Active
42-131-06280	26	Active
42-131-06283	29	Active
42-131-06284	31	Active
42-131-06286	33	Active
42-131-06338	30	Shut-in
42-131-35186	L 34	Shut-in
42-131-35225	35	Active
42-131-36332	36	Shut-in
42-131-36424	37	Shut-in
42-131-36579	38	Active
42-131-36623	39	Active
42-131-37057	40	Active
42-131-37338	41	Shut-in
42-131-37530	42	Active
42-131-37540	43	Active
42-131-37609	44	Active
42-131-38820	46	Shut-in
42-131-80262	2	Shut-in
42-131-80265	6	Active
42-131-80266	7	Shut-in
42-131-80267	12	Shut-in
42-131-80269	17	Active
42-131-80271	20	Shut-in
42-131-80272	24	Active
42-131-82369	10	Active
42-131-82371	16	Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
Company	Product	Role	Share%	From
Gulfmark Energy, Inc.	Oil	Gathers	100	Sep 1, 2006

SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).

Who buys my oil Oil price check

756 acres on the newest permit

Good to know
43 wells are listed on this lease
Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.
Worth asking
A Rule 37 case is listed
The RRC permit records list a Rule 37 case. This does not establish your royalty share. Ask for the permit and unit plat for your well.

Check your decimal on this lease

Permits for Duval Co. Ranch Co.-State -L-
API number	Well no.	Permit issued	Completed	Acreson the permit	Type
42-131-38820	46	Jul 13, 2005	Oct 5, 2005	756	Vertical
42-131-37609	44	Oct 27, 1992	Feb 17, 1993	756	Vertical
42-131-37540	43	Feb 7, 1992	Jan 11, 1993	756	Vertical
42-131-37530	42	Dec 16, 1991	Aug 12, 1992	756	Vertical
42-131-37338	41	Mar 12, 1990	Apr 21, 1990	756	Vertical
42-131-37057	40	Oct 30, 1987	Nov 16, 1987	756	Vertical
42-131-36623	39	Dec 21, 1984	Mar 21, 1985	756	Vertical
42-131-36579	38	Oct 30, 1984	Mar 21, 1985	756	Vertical
42-131-36424	37	Mar 15, 1984	May 1, 1984	756	Vertical
42-131-36332	36	Sep 8, 1983	Nov 1, 1983	756	Vertical
42-131-35225	35	Jun 4, 1981	Feb 6, 1984	756	Vertical
42-131-35186	L 34	Apr 3, 1981	Jan 5, 1982	756	Vertical

SourceRailroad Commission drilling permits, Oct 3, 2026 (source 1, source 2).

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for DUVAL CO. RANCH CO.-STATE -L-
Month	Operator	Oil producedbbl	Oil soldbbl	WTI$/bbl	Henry Hub$/MMBtu
Jul 2026Caribbean Energy	Caribbean Energy LLC II	131	153	$80.46	$2.89
Jun 2026Caribbean Energy	Caribbean Energy LLC II	105	58	$84.81	$3.15
May 2026Caribbean Energy	Caribbean Energy LLC II	90	160	$102.13	$2.94
Apr 2026Caribbean Energy	Caribbean Energy LLC II	79	160	$100.32	$2.77
Mar 2026Caribbean Energy	Caribbean Energy LLC II	86	0	$91.38	$3.04
Feb 2026Caribbean Energy	Caribbean Energy LLC II	68	0	$64.51	$3.62
Jan 2026Caribbean Energy	Caribbean Energy LLC II	123	145	$60.04	$7.72
Dec 2025Caribbean Energy	Caribbean Energy LLC II	86	146	$57.97	$4.26
Nov 2025Caribbean Energy	Caribbean Energy LLC II	79	0	$60.06	$3.79
Oct 2025Caribbean Energy	Caribbean Energy LLC II	133	158	$60.89	$3.19
Sep 2025Caribbean Energy	Caribbean Energy LLC II	0	47	$63.96	$2.97
Aug 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$64.86	$2.91
Jul 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	3	0	$68.39	$3.20
Jun 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	198	157	$68.17	$3.02
May 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$62.17	$3.12
Apr 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	97	142	$63.54	$3.42
Mar 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	201	158	$68.24	$4.12
Feb 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	79	163	$71.53	$4.19
Jan 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	87	0	$75.74	$4.13
Dec 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	64	144	$70.12	$3.01
Nov 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$69.95	$2.12
Oct 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$71.99	$2.20
Sep 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$70.24	$2.28
Aug 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	78	0	$76.68	$1.99
Jul 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	79	151	$81.80	$2.07
Jun 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	72	0	$79.77	$2.54
May 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	71	124	$80.02	$2.12
Apr 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	62	153	$85.35	$1.60
Mar 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	104	0	$81.28	$1.49
Feb 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	25	0	$77.25	$1.72
Jan 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	14	0	$74.15	$3.18
Dec 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	39	142	$71.90	$2.52
Nov 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	90	0	$77.69	$2.71
Oct 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	88	122	$85.64	$2.98
Sep 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	37	0	$89.43	$2.64
Aug 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	29	139	$81.39	$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

How to check your stub against this lease Checks stopped on this lease? See the likely reasons

Do your checks match this lease?