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Texas oil lease

Producing

COX 9-12 UNIT 2

Cox 9-12 Unit 2 is an oil lease in Martin County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

13 wells

402,200bbl oil, last 12 months−52% vs prior year
Operator
Diamondback E&P LLC
County
Martin County
Field
Spraberry (Trend Area)
RRC lease
08-51547

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Where it sits

This county

Martin CountyMartinGainesAndrewsHowardDawsonBordenMartin County
Martin County
Gas, last 12 months
1,893,104 mcf
Oil in Jul 2026
19,428 bbl

Production by month

Oil output fell 52% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 52% over the last 12 monthsMonthly oil production and gas for COX 9-12 UNIT 2, Aug 2023 to Jul 2026. Oil output fell 52% over the last 12 months. 402,200 bbl in the 12 months through Jul 2026, against 830,288 bbl in the 12 months before.Last 12 months: 402,200 bblbbl per monthmcf per month0050k50k100k100k150k150k200k200k250k250kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 52% over the last 12 monthsMonthly oil production and gas for COX 9-12 UNIT 2, Aug 2023 to Jul 2026. Oil output fell 52% over the last 12 months. 402,200 bbl in the 12 months through Jul 2026, against 830,288 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0050k50k100k100k150k150k200k200k250k250kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Dec 2024 the lease's gas goes to a transmission line instead of lease fuel

  • Processing plant (3)
  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
Since Dec 2024 the lease's gas goes to a transmission line instead of lease fuelShare of COX 9-12 UNIT 2 gas by disposition code each month, Aug 2023 to Jul 2026. Since Dec 2024 the lease's gas goes to a transmission line instead of lease fuel.Share of the lease’s gas by disposition code, per month0%50%100%Dec 2024: fuel to lineOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Dec 2024 the lease's gas goes to a transmission line instead of lease fuelShare of COX 9-12 UNIT 2 gas by disposition code each month, Aug 2023 to Jul 2026. Since Dec 2024 the lease's gas goes to a transmission line instead of lease fuel.Share of gas by disposition code0%50%100%Dec 24: fuel to lineJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    99% · 1,872,538 mcf

  • Lease fuel (1)

    0.7% · 12,857 mcf

  • Flared (4)

    0.4% · 7,709 mcf

0.4% of the gas flared in the last 12 months. No month above 3%.

Who has run this lease

The operator changed once, most recently in Jan 2025

Operators of this lease over timeEndeavor Energy Resources L.P., Jan 2020 to Dec 2024; Diamondback E&P LLC, Jan 2025 to Jul 20262020202120222023202420252026Changed Jan 2025Endeavor Energy Resources L.P.Jan 2020 to Dec 2024Diamondback E&P LLCJan 2025 to now
Operators of this lease over timeEndeavor Energy Resources L.P., Jan 2020 to Dec 2024; Diamondback E&P LLC, Jan 2025 to Jul 20262020202120222023202420252026Changed Jan 2025Endeavor Energy Resources L.P.Jan 2020 to Dec 2024Diamondback E&P LLCJan 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

13 wells on this lease

Wells on COX 9-12 UNIT 2
API numberWell no.Status
42-317-41226281Active
42-317-41228282Active
42-317-41229271Active
42-317-41230173Active
42-317-41231272Active
42-317-45609251Active
42-317-45610152Active
42-317-45611153Active
42-317-45612161Active
42-317-45613163Active
42-317-45614174Active
42-317-45626162Active
42-317-45627175Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Medallion Operating Company, LLCOilGathers100Jul 1, 2019–
Navitas Mdstr Midland Basin, LLCCasinghead gasGathers100Nov 7, 2018Jul 1, 2019
Navitas Mdstr Midland Basin, LLCCasinghead gasBuys100Nov 7, 2018Jul 1, 2019
Gibson Energy Marketing, LLCOilGathers10Nov 7, 2018Jul 1, 2019
Oasis Transp & Marketing Corp.OilGathers10Nov 7, 2018Jul 1, 2019
Rio Energy International, Inc.OilGathers80Nov 7, 2018Jul 1, 2019

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

Who buys my oilOil price check

511.42 acres on the newest permit

13 wells are listed on this lease

Permits for Cox 9-12 Unit 2
API numberWell no.Acreson the permit
42-317-45610152511.42
42-317-45611153511.42
42-317-45609251511.42
42-317-45612161511.42
42-317-45613163511.42
42-317-45614174511.42
42-317-45626162511.42
42-317-45627175511.42
42-317-41230173498
42-317-41226281498
42-317-41228282498
42-317-41229271498

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

Unit decimal checker

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.
QuarterOil$ per bblFiling
Q2 2026$96.82SEC filing
Q1 2026$73.47SEC filing
Q4 2025$58.00SEC filing
Q3 2025$64.60SEC filing
Q2 2025$63.23SEC filing
Q1 2025$70.95SEC filing

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

Estimate your royalty

36 months, newest first

Ledger for COX 9-12 UNIT 2
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Diamondback E&P19,42819,500130,655129,45228$80.46$2.89
Jun 2026Diamondback E&P23,81723,601148,915147,70036$84.81$3.15
May 2026Diamondback E&P25,91526,438151,900150,57248$102.13$2.94
Apr 2026Diamondback E&P28,06928,238155,547153,26113$100.32$2.77
Mar 2026Diamondback E&P28,43428,333142,114138,8532,290$91.38$3.04
Feb 2026Diamondback E&P30,67930,656150,605149,544210$64.51$3.62
Jan 2026Diamondback E&P33,60835,176144,209141,8611,646$60.04$7.72
Dec 2025Diamondback E&P35,79734,084161,343160,327145$57.97$4.26
Nov 2025Diamondback E&P36,56536,540157,065156,18326$60.06$3.79
Oct 2025Diamondback E&P42,07545,080180,673179,7630$60.89$3.19
Sep 2025Diamondback E&P46,06443,200179,686178,669131$63.96$2.97
Aug 2025Diamondback E&P51,74951,705190,392186,3533,136$64.86$2.91
Jul 2025Diamondback E&P59,51559,390201,267198,57730$68.39$3.20
Jun 2025Diamondback E&P65,13165,093205,347200,8531,777$68.17$3.02
May 2025Diamondback E&P81,84581,863234,408231,265100$62.17$3.12
Apr 2025Diamondback E&P98,71898,700240,893236,665866$63.54$3.42
Mar 2025Diamondback E&P119,955120,069232,659229,347103$68.24$4.12
Feb 2025Diamondback E&P134,858134,526190,334187,761105$71.53$4.19
Jan 2025Diamondback E&P159,106159,730175,518172,67945$75.74$4.13
Dec 2024Endeavor Energy98,03997,24097,24394,85389$70.12$3.01
Nov 2024Endeavor Energy11013701$69.95$2.12
Oct 2024Endeavor Energy1,6081,7204,2812,2811$71.99$2.20
Sep 2024Endeavor Energy5,7485,74816,69212,8830$70.24$2.28
Aug 2024Endeavor Energy5,7545,75215,50211,6290$76.68$1.99
Jul 2024Endeavor Energy5,9505,95817,03713,1930$81.80$2.07
Jun 2024Endeavor Energy6,0366,04417,01313,2540$79.77$2.54
May 2024Endeavor Energy6,4976,43517,67913,8470$80.02$2.12
Apr 2024Endeavor Energy6,0766,03016,27312,4320$85.35$1.60
Mar 2024Endeavor Energy6,7696,81016,75312,9190$81.28$1.49
Feb 2024Endeavor Energy5,9235,93313,88410,0580$77.25$1.72
Jan 2024Endeavor Energy3,4083,3958,8485,4910$74.15$3.18
Dec 2023Endeavor Energy4,5955,05113,93210,1830$71.90$2.52
Nov 2023Endeavor Energy5,8326,07911,66211,6620$77.69$2.71
Oct 2023Endeavor Energy7,9187,39217,13013,2900$85.64$2.98
Sep 2023Endeavor Energy5,4135,55513,2979,5265$89.43$2.64
Aug 2023Endeavor Energy5,3915,4057,4773,6810$81.39$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Sep 28, 2026.

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This lease belongs to

OperatorDiamondback E&P LLCFieldSpraberry (Trend Area)CountyMartin County

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