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Texas oil lease

Producing

UL 21 YELLOWTAIL

Ul 21 Yellowtail is an oil lease in Winkler County, Texas, operated by Apache Corporation in the Phantom (Wolfcamp) field.

3 wells

45,910bbl oil, last 12 months+249% vs prior year
Operator
Apache Corporation
County
Winkler County
Field
Phantom (Wolfcamp)
RRC lease
08-49015

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Where it sits

This county

Winkler CountyWinklerAndrewsWardLovingEctorWinkler County
Winkler County
Gas, last 12 months
59,672 mcf
Oil in Jul 2026
3,427 bbl

Production by month

Oil output rose 249% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output rose 249% over the last 12 monthsMonthly oil production and gas for UL 21 YELLOWTAIL, Aug 2023 to Jul 2026. Oil output rose 249% over the last 12 months. 45,910 bbl in the 12 months through Jul 2026, against 13,139 bbl in the 12 months before.Last 12 months: 45,910 bblbbl per monthmcf per month001,0002,0002,0004,0003,0006,0004,0008,0005,00010kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 249% over the last 12 monthsMonthly oil production and gas for UL 21 YELLOWTAIL, Aug 2023 to Jul 2026. Oil output rose 249% over the last 12 months. 45,910 bbl in the 12 months through Jul 2026, against 13,139 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001,0002,0002,0004,0003,0006,0004,0008,0005,00010kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Mar 2025 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 Mar 2025 the lease's gas goes to a transmission line instead of lease fuelShare of UL 21 YELLOWTAIL gas by disposition code each month, Aug 2023 to Jul 2026. Since Mar 2025 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%Mar 2025: fuel to lineOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Mar 2025 the lease's gas goes to a transmission line instead of lease fuelShare of UL 21 YELLOWTAIL gas by disposition code each month, Aug 2023 to Jul 2026. Since Mar 2025 the lease's gas goes to a transmission line instead of lease fuel.Share of gas by disposition code0%50%100%Mar 25: fuel to lineJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    95% · 56,912 mcf

  • Lease fuel (1)

    4.2% · 2,502 mcf

  • Flared (4)

    0.4% · 258 mcf

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

Who has run this lease

The operator changed 3 times, most recently in Aug 2024

Operators of this lease over timeOasis Petroleum Permian LLC, Jan 2020 to Feb 2021; Percussion Petroleum Oper Ii,llc, Mar 2021 to Jul 2023; Callon Permian II, LLC, Aug 2023 to Jul 2024; Apache Corporation, Aug 2024 to Jul 20262020202120222023202420252026Changed Mar 2021Changed Aug 2023Changed Aug 2024Oasis Petroleum Permian LLCJan 2020 to Feb 2021Percussion Petroleum Oper Ii,…Mar 2021 to Jul 2023Callon Permian II, LLCAug 2023 to Jul 2024Apache CorporationAug 2024 to now
Operators of this lease over timeOasis Petroleum Permian LLC, Jan 2020 to Feb 2021; Percussion Petroleum Oper Ii,llc, Mar 2021 to Jul 2023; Callon Permian II, LLC, Aug 2023 to Jul 2024; Apache Corporation, Aug 2024 to Jul 20262020202120222023202420252026Changed Mar 2021Changed Aug 2023Changed Aug 2024Oasis Petroleum Permian LLCJan 2020 to Feb 2021Percussion Petroleum Oper Ii,llcMar 2021 to Jul 2023Callon Permian II, LLCAug 2023 to Jul 2024Apache CorporationAug 2024 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

3 wells on this lease

Wells on UL 21 YELLOWTAIL
API numberWell no.Status
42-495-337691HActive
42-495-339522HActive
42-495-340403HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Energy Transfer CompanyOilGathers100Sep 1, 2025–
Targa Delaware LLCCasinghead gasBuys100Apr 23, 2017–
Targa Delaware LLCCasinghead gasGathers100Apr 23, 2017–
Oryx Delaware Oil Transport LLCOilGathers100Jan 22, 2020Sep 1, 2025
Targa Delaware LLCOilGathers100Jan 1, 2019Jan 22, 2020
Concord Crude Oil Marketing LLCOilGathers30Aug 1, 2018Jan 1, 2019
Pe Logistics LLCOilGathers70Aug 1, 2018Jan 1, 2019

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

Who buys my oilOil price check

1,281.40 acres on the newest permit

  • Worth asking

    A production sharing agreement well is on this lease

    A production sharing agreement divides production by a method the agreement sets. Ask the operator for the agreement and the tract percentage it gives your land.

  • 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 Ul 21 Yellowtail
API numberWell no.Acreson the permit
42-495-340403H1,281.40
42-495-339522H1,281.40
42-495-337691H1,281.40

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

Unit decimal checker

What APA Corporation told investors it received

Apache Corporation is linked to APA Corporation (APA).
Realized prices reported by APA Corporation
QuarterOil$ per bblFiling
Q2 2026$98.24SEC filing
Q1 2026$78.69SEC filing
Q4 2025$61.03SEC filing
Q3 2025$67.43SEC filing
Q2 2025$65.58SEC filing
Q1 2025$73.73SEC filing

SourceAPA Corporation quarterly reports, SEC EDGAR, company-wide averages before hedging.

Estimate your royalty

36 months, newest first

Ledger for UL 21 YELLOWTAIL
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Apache Corporation3,4273,4383,4563,4340$80.46$2.89
Jun 2026Apache Corporation3,8533,9244,0113,9890$84.81$3.15
May 2026Apache Corporation4,4904,4014,0093,9860$102.13$2.94
Apr 2026Apache Corporation4,7404,7983,7163,6940$100.32$2.77
Mar 2026Apache Corporation3,5953,8137,3347,3130$91.38$3.04
Feb 2026Apache Corporation3,9183,6673,8993,8700$64.51$3.62
Jan 2026Apache Corporation4,0104,2503,8893,8630$60.04$7.72
Dec 2025Apache Corporation2,9053,5334,8054,0253$57.97$4.26
Nov 2025Apache Corporation3,6793,6298,5727,664164$60.06$3.79
Oct 2025Apache Corporation3,7742,8685,5524,7351$60.89$3.19
Sep 2025Apache Corporation3,0163,9324,6644,57490$63.96$2.97
Aug 2025Apache Corporation4,5034,2705,7655,7650$64.86$2.91
Jul 2025Apache Corporation4,2484,1035,4355,4341$68.39$3.20
Jun 2025Apache Corporation4,2093,6713,6503,6464$68.17$3.02
May 2025Apache Corporation0666000$62.17$3.12
Apr 2025Apache Corporation1,3667001,5441,5440$63.54$3.42
Mar 2025Apache Corporation0052520$68.24$4.12
Feb 2025Apache Corporation0272000$71.53$4.19
Jan 2025Apache Corporation00000$75.74$4.13
Dec 2024Apache Corporation5448100$70.12$3.01
Nov 2024Apache Corporation7646600$69.95$2.12
Oct 2024Apache Corporation230726782150$71.99$2.20
Sep 2024Apache Corporation4248404804800$70.24$2.28
Aug 2024Apache Corporation2,6503,0214,1244,1240$76.68$1.99
Jul 2024Callon Permian3,0382,7002,1532,1530$81.80$2.07
Jun 2024Callon Permian3,1453,2343,5673,5670$79.77$2.54
May 2024Callon Permian3,1823,0793,8113,8110$80.02$2.12
Apr 2024Callon Permian3,0653,0743,2673,2670$85.35$1.60
Mar 2024Callon Permian3,1063,0403,1663,1660$81.28$1.49
Feb 2024Callon Permian3,0703,2572,7512,7510$77.25$1.72
Jan 2024Callon Permian3,3203,1752,5552,5532$74.15$3.18
Dec 2023Callon Permian3,4063,4402,9192,9190$71.90$2.52
Nov 2023Callon Permian3,1543,1041,7741,7740$77.69$2.71
Oct 2023Callon Permian3,2933,2263,4643,4470$85.64$2.98
Sep 2023Callon Permian3,0793,2861,6691,6690$89.43$2.64
Aug 2023Callon Permian3,6533,5883,4373,4370$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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Nearby

This lease belongs to

OperatorApache CorporationFieldPhantom (Wolfcamp)CountyWinkler County

Apache Corporation in Winkler County

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Phantom (Wolfcamp) field

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