Texas oil lease

No report in 6+ months

COX, EDNA "8"

Name: COX, EDNA "8" monthly oil and gas production, Martin County, Texas
Creator: Texas Railroad Commission

Cox, Edna "8" is an oil lease in Martin County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

1 well

0bbl oil, since Nov 2024

Operator: Diamondback E&P LLC
County: Martin County
Field: Spraberry (Trend Area)
RRC lease: 08-36278

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Where it sits

This county

Martin County

Oil in Apr 2025: 0 bbl
Reporting since: Nov 2024

Checks stopped on this lease?

Operator
Operator changed: Diamondback E&P LLC took over from Endeavor Energy Resources L.P. in Jan 2025.
Sales
No sales reported for the last 12 months of state data (through Jul 2026).
Wells
The one well on this lease is marked plugged.

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

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Production by month

No production to chart

The state shows zero oil and zero gas for all 6 months we hold (Nov 2024 to Apr 2025). A lease that is shut in or newly reported looks like this. The ledger below lists each month.

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 once, most recently in Jan 2025

Diamondback E&P LLC Jan 2025 to now
Endeavor Energy Resources L.P. Nov 2024 to Dec 2024

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on COX, EDNA "8"
API number	Well no.	Status
42-317-31492	1	Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
Company	Product	Role	Share%	From
Oasis Transp & Marketing Corp.	Oil	Gathers	100	Aug 1, 1999
Dcp Operating Company, LP	Casinghead gas	Buys	100	Apr 1, 2017
Dcp Operating Company, LP	Casinghead gas	Gathers	100	Apr 1, 2017

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

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160 acres on the newest permit

Good to know
All listed wells are plugged
The RRC wellbore records mark all listed wells as plugged. These records do not show whether earlier royalties remain payable. Ask the payor about any unpaid months.

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Permits for Cox, Edna "8"
API number	Well no.	Permit issued	Completed	Acreson the permit	Type
42-317-31492	1	Mar 9, 2018	Jul 15, 1999	160	Vertical

SourceRailroad Commission drilling permits, Sep 26, 2026 (source 1, source 2).

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What Diamondback Energy, Inc. told investors it received

Diamondback E&P LLC is linked to Diamondback Energy, Inc. (FANG).

Realized prices reported by Diamondback Energy, Inc.
Quarter	Oil$ per bbl	Gas$ per mcf	Gas liquids$ per bbl	Filing
Q2 2026	$96.82	−$2.15	$18.56	SEC filing
Q1 2026	$73.47	$0.18	$16.68	SEC filing
Q4 2025	$58.00	$0.03	$13.51	SEC filing
Q3 2025	$64.60	$0.75	$17.28	SEC filing
Q2 2025	$63.23	$0.88	$18.13	SEC filing
Q1 2025	$70.95	$2.11	$23.94	SEC filing

SourceDiamondback Energy, Inc. quarterly reports, SEC EDGAR, company-wide averages before hedging.

Estimate your royalty

6 months, newest first

Ledger for COX, EDNA "8"
Month	Operator	WTI$/bbl	Henry Hub$/MMBtu
Apr 2025Diamondback E&P	Diamondback E&P LLC	$63.54	$3.42
Mar 2025Diamondback E&P	Diamondback E&P LLC	$68.24	$4.12
Feb 2025Diamondback E&P	Diamondback E&P LLC	$71.53	$4.19
Jan 2025Diamondback E&P	Diamondback E&P LLC	$75.74	$4.13
Dec 2024Endeavor Energy	Endeavor Energy Resources L.P.	$70.12	$3.01
Nov 2024Endeavor Energy	Endeavor Energy Resources L.P.	$69.95	$2.12

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

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