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Texas oil lease

Producing

OTB O'BRIEN 43

Otb O'Brien 43 is an oil lease in Martin County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

7 wells

2,710bbl oil, last 12 months−60% vs prior year
Operator
Diamondback E&P LLC
County
Martin County
Field
Spraberry (Trend Area)
RRC lease
08-39301

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Where it sits

This county

Martin CountyMartinGainesAndrewsHowardDawsonBordenMartin County
Martin County
Gas, last 12 months
48,637 mcf
Oil in Jul 2026
6 bbl

Checks stopped on this lease?

  • Operator

    Operator changed: Diamondback E&P LLC took over from Endeavor Energy Resources L.P. in Jan 2025.

  • Buyer

    Buyer changed: ET GATHERING & PROCESSING LLC replaced ETC GAS PROCESSING, LLC as the buyer of this lease's gas from oil wells on Mar 1, 2026.

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

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Production by month

Oil output fell 60% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 60% over the last 12 monthsMonthly oil production and gas for OTB O'BRIEN 43, Aug 2023 to Jul 2026. Oil output fell 60% over the last 12 months. 2,710 bbl in the 12 months through Jul 2026, against 6,798 bbl in the 12 months before.Last 12 months: 2,710 bblbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 60% over the last 12 monthsMonthly oil production and gas for OTB O'BRIEN 43, Aug 2023 to Jul 2026. Oil output fell 60% over the last 12 months. 2,710 bbl in the 12 months through Jul 2026, against 6,798 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plant

  • Processing plant (3)
  • Transmission line (2)
Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plantShare of OTB O'BRIEN 43 gas by disposition code each month, Aug 2023 to Jul 2026. Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plant.Share of the lease’s gas by disposition code, per month0%50%100%Nov 2024: plant to lineOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plantShare of OTB O'BRIEN 43 gas by disposition code each month, Aug 2023 to Jul 2026. Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plant.Share of gas by disposition code0%50%100%Nov 24: plant to lineJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

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.

7 wells on this lease

Wells on OTB O'BRIEN 43
API numberWell no.Status
42-317-353183Active
42-317-354921Shut-in
42-317-359675Shut-in
42-317-366967Active
42-317-377932Active
42-317-379128Active
42-317-379156Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Explore Logistics LLCOilGathers100Apr 1, 2025–
Et Gathering & Processing LLCCasinghead gasBuys100Mar 1, 2026–
Energy Transfer CompanyCasinghead gasGathers100Apr 1, 2025–
Etc Gas Processing, LLCCasinghead gasBuys100Apr 1, 2025Mar 1, 2026
Wtg Gas Processing, L.p.Casinghead gasGathers100May 1, 2015Apr 1, 2025
Wtg Gas Processing, L.p.Casinghead gasBuys100May 1, 2015Apr 1, 2025
Oasis Transp & Marketing Corp.OilGathers100Apr 1, 2018Apr 1, 2025

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

Who buys my oilOil price check

320 acres on the newest permit

  • Good to know

    7 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.

Check your decimal on this lease
Permits for Otb O'Brien 43
API numberWell no.Acreson the permit
42-317-379128320
42-317-379156320
42-317-377932320
42-317-366967320
42-317-359675320
42-317-354921320
42-317-353183320

SourceRailroad Commission drilling permits, Oct 3, 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 OTB O'BRIEN 43
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Diamondback E&P6092920$80.46$2.89
Jun 2026Diamondback E&P1201783,3383,3380$84.81$3.15
May 2026Diamondback E&P1321884,1654,1650$102.13$2.94
Apr 2026Diamondback E&P147144,6044,6040$100.32$2.77
Mar 2026Diamondback E&P1371844,2264,2260$91.38$3.04
Feb 2026Diamondback E&P2111845,1435,1430$64.51$3.62
Jan 2026Diamondback E&P4083725,8975,8970$60.04$7.72
Dec 2025Diamondback E&P1591752,2202,2200$57.97$4.26
Nov 2025Diamondback E&P3143755,2315,2310$60.06$3.79
Oct 2025Diamondback E&P3893595,3535,3530$60.89$3.19
Sep 2025Diamondback E&P4545485,6905,6900$63.96$2.97
Aug 2025Diamondback E&P2331892,6782,6780$64.86$2.91
Jul 2025Diamondback E&P3945418,0578,0570$68.39$3.20
Jun 2025Diamondback E&P3991881,4461,4460$68.17$3.02
May 2025Diamondback E&P382374000$62.17$3.12
Apr 2025Diamondback E&P493546000$63.54$3.42
Mar 2025Diamondback E&P712728000$68.24$4.12
Feb 2025Diamondback E&P709726000$71.53$4.19
Jan 2025Diamondback E&P625902000$75.74$4.13
Dec 2024Endeavor Energy600724000$70.12$3.01
Nov 2024Endeavor Energy4453391,2651,2650$69.95$2.12
Oct 2024Endeavor Energy1,0037108,6948,6940$71.99$2.20
Sep 2024Endeavor Energy2796789,8539,8530$70.24$2.28
Aug 2024Endeavor Energy7577159,6789,6780$76.68$1.99
Jul 2024Endeavor Energy7257038,5408,5400$81.80$2.07
Jun 2024Endeavor Energy7486597,5307,5300$79.77$2.54
May 2024Endeavor Energy8816996,8296,8290$80.02$2.12
Apr 2024Endeavor Energy8111,0059,2459,2450$85.35$1.60
Mar 2024Endeavor Energy9251,0278,6698,6690$81.28$1.49
Feb 2024Endeavor Energy9641,0075,2645,2640$77.25$1.72
Jan 2024Endeavor Energy1,0111,03213130$74.15$3.18
Dec 2023Endeavor Energy9226981,4611,4610$71.90$2.52
Nov 2023Endeavor Energy1,3031,4041,4061,4060$77.69$2.71
Oct 2023Endeavor Energy1,6841,5333,5543,5540$85.64$2.98
Sep 2023Endeavor Energy1,3271,3596,3866,3860$89.43$2.64
Aug 2023Endeavor Energy1,2981,5477,2317,2310$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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This lease belongs to

OperatorDiamondback E&P LLCFieldSpraberry (Trend Area)CountyMartin County

Diamondback E&P LLC in Martin County

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Spraberry (Trend Area) field

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