Texas oil lease

Producing

DUVAL CO. RANCH CO. -D-

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

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

11 wells

1,226bbl oil, last 12 months+22% vs prior year

Operator: Caribbean Energy LLC II
County: Duval County
Field: Colmena
RRC lease: 04-00556

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Where it sits

This county

Duval County

Oil in Jul 2026: 160 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.

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Production by month

Oil output rose 22% 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.

11 wells on this lease

Wells on DUVAL CO. RANCH CO. -D-
API number	Well no.	Status
42-131-06240	9	Active
42-131-06241	10W	Active
42-131-06242	11	Active
42-131-06246	15W	Active
42-131-06248	17W	Active
42-131-06253	22W	Active
42-131-36662	23	Active
42-131-80258	13	Active
42-131-80259	18	Shut-in
42-131-80260	19	Active
42-131-80261	20	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).

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334 acres on the newest permit

Good to know
17 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.

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Permits for Duval Co. Ranch Co. -D-
API number	Well no.	Permit issued	Completed	Acreson the permit	Type
42-131-36662	23	Feb 26, 1985	Mar 22, 1985	334	Vertical
42-131-06235	4W	–	Oct 16, 1960	–	–
42-131-06238	7W	–	Oct 17, 1960	–	–
42-131-06239	8W	–	Oct 19, 1960	–	–
42-131-06240	9	–	Jan 12, 1984	–	–
42-131-06241	10W	–	Oct 20, 1960	–	–
42-131-06242	11	–	–	–	–
42-131-06243	12	–	–	–	–
42-131-06245	14W	–	Oct 24, 1959	–	–
42-131-06246	15W	–	Jan 23, 1961	–	–
42-131-06248	17W	–	Oct 23, 1959	–	–
42-131-06252	21W	–	Sep 9, 1960	–	–

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

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36 months, newest first

Ledger for DUVAL CO. RANCH CO. -D-
Month	Operator	Oil producedbbl	Oil soldbbl	WTI$/bbl	Henry Hub$/MMBtu
Jul 2026Caribbean Energy	Caribbean Energy LLC II	160	57	$80.46	$2.89
Jun 2026Caribbean Energy	Caribbean Energy LLC II	126	158	$84.81	$3.15
May 2026Caribbean Energy	Caribbean Energy LLC II	101	155	$102.13	$2.94
Apr 2026Caribbean Energy	Caribbean Energy LLC II	170	160	$100.32	$2.77
Mar 2026Caribbean Energy	Caribbean Energy LLC II	164	104	$91.38	$3.04
Feb 2026Caribbean Energy	Caribbean Energy LLC II	154	146	$64.51	$3.62
Jan 2026Caribbean Energy	Caribbean Energy LLC II	168	149	$60.04	$7.72
Dec 2025Caribbean Energy	Caribbean Energy LLC II	183	159	$57.97	$4.26
Nov 2025Caribbean Energy	Caribbean Energy LLC II	0	0	$60.06	$3.79
Oct 2025Caribbean Energy	Caribbean Energy LLC II	0	0	$60.89	$3.19
Sep 2025Caribbean Energy	Caribbean Energy LLC II	0	85	$63.96	$2.97
Aug 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$64.86	$2.91
Jul 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$68.39	$3.20
Jun 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$68.17	$3.02
May 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$62.17	$3.12
Apr 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$63.54	$3.42
Mar 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$68.24	$4.12
Feb 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	0	0	$71.53	$4.19
Jan 2025Rattlesnake Operating	Rattlesnake Operating Co, LLC	75	0	$75.74	$4.13
Dec 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	241	305	$70.12	$3.01
Nov 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	150	308	$69.95	$2.12
Oct 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	165	0	$71.99	$2.20
Sep 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	145	91	$70.24	$2.28
Aug 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	225	249	$76.68	$1.99
Jul 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	178	154	$81.80	$2.07
Jun 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	153	152	$79.77	$2.54
May 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	165	154	$80.02	$2.12
Apr 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	145	307	$85.35	$1.60
Mar 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	185	154	$81.28	$1.49
Feb 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	53	157	$77.25	$1.72
Jan 2024Rattlesnake Operating	Rattlesnake Operating Co, LLC	236	0	$74.15	$3.18
Dec 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	216	278	$71.90	$2.52
Nov 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	160	154	$77.69	$2.71
Oct 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	201	155	$85.64	$2.98
Sep 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	71	101	$89.43	$2.64
Aug 2023Rattlesnake Operating	Rattlesnake Operating Co, LLC	156	148	$81.39	$2.58

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

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