Skip to content
Royalty Clerk

Texas oil lease

Producing

IRON MOUNTAIN "D"

Iron Mountain "D" is an oil lease in Polk County, Texas, operated by IV Standard, LLC in the Ace, North (4850) field.

3 wells

2,588bbl oil, last 12 months+39% vs prior year
Operator
IV Standard, LLC
County
Polk County
Field
Ace, North (4850)
RRC lease
03-25238

Is your check right?

Check my statement

Where it sits

This county

Polk CountyPolkWalkerSan JacintoSan AugustineTrinityHoustonTylerAngelinaPolk County
Polk County
Gas, last 12 months
228 mcf
Oil in Jul 2026
287 bbl

Checks stopped on this lease?

  • Operator

    Operator changed: IV Standard, LLC took over from Arcadia Operating, LLC in Jan 2026.

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

See why checks stop on this lease

Production by month

Oil output rose 39% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output rose 39% over the last 12 monthsMonthly oil production and gas for IRON MOUNTAIN "D", Aug 2023 to Jul 2026. Oil output rose 39% over the last 12 months. 2,588 bbl in the 12 months through Jul 2026, against 1,864 bbl in the 12 months before.Last 12 months: 2,588 bblbbl per monthmcf per month0010050200100300150400200500250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 39% over the last 12 monthsMonthly oil production and gas for IRON MOUNTAIN "D", Aug 2023 to Jul 2026. Oil output rose 39% over the last 12 months. 2,588 bbl in the 12 months through Jul 2026, against 1,864 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0010050200100300150400200500250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

All of the gas went to a transmission line in the 2 months reported

All of the gas went to a transmission line in the 2 months reportedShare of IRON MOUNTAIN "D" gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a transmission line in the 2 months reported.Share of the lease’s gas by disposition code, per month0%50%100%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
All of the gas went to a transmission line in the 2 months reportedShare of IRON MOUNTAIN "D" gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a transmission line in the 2 months reported.Share of gas by disposition code0%50%100%Jan 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 2026

Operators of this lease over timeArcadia Operating, LLC, Jan 2020 to Dec 2025; IV Standard, LLC, Jan 2026 to Jul 20262020202120222023202420252026Changed Jan 2026Arcadia Operating, LLCJan 2020 to Dec 2025IV Standard, LLCJan 2026 to now
Operators of this lease over timeArcadia Operating, LLC, Jan 2020 to Dec 2025; IV Standard, LLC, Jan 2026 to Jul 20262020202120222023202420252026Changed Jan 2026Arcadia Operating, LLCJan 2020 to Dec 2025IV Standard, LLCJan 2026 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

3 wells on this lease

Wells on IRON MOUNTAIN "D"
API numberWell no.Status
42-373-311281Shut-in
42-373-311402Active
42-373-311493SDActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Gulfmark Energy, Inc.OilGathers100Dec 1, 2019–
Arcadia Operating, LLCCasinghead gasBuys100May 1, 2016–
Arcadia Operating, LLCCasinghead gasGathers100Apr 1, 2017–
Sunoco Ptnrs. Mktg.&terminals LPOilGathers100Apr 1, 2017Dec 1, 2019

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

Who buys my oilOil price check

88.94 acres on the newest permit

Check your decimal on this lease
Permits for Iron Mountain "D"
API numberWell no.Acreson the permit
42-373-31128188.94
42-373-311493SD88.94
42-373-31140288.94

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

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for IRON MOUNTAIN "D"
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026IV Standard,287360000$80.46$2.89
Jun 2026IV Standard,292319000$84.81$3.15
May 2026IV Standard,265163000$102.13$2.94
Apr 2026IV Standard,341343000$100.32$2.77
Mar 2026IV Standard,388354000$91.38$3.04
Feb 2026IV Standard,72176000$64.51$3.62
Jan 2026IV Standard,433327000$60.04$7.72
Dec 2025Arcadia Operating,54175000$57.97$4.26
Nov 2025Arcadia Operating,820000$60.06$3.79
Oct 2025Arcadia Operating,901732282280$60.89$3.19
Sep 2025Arcadia Operating,142162000$63.96$2.97
Aug 2025Arcadia Operating,1420000$64.86$2.91
Jul 2025Arcadia Operating,143260000$68.39$3.20
Jun 2025Arcadia Operating,145170000$68.17$3.02
May 2025Arcadia Operating,153170000$62.17$3.12
Apr 2025Arcadia Operating,172170000$63.54$3.42
Mar 2025Arcadia Operating,1550000$68.24$4.12
Feb 2025Arcadia Operating,167354000$71.53$4.19
Jan 2025Arcadia Operating,170172000$75.74$4.13
Dec 2024Arcadia Operating,156173000$70.12$3.01
Nov 2024Arcadia Operating,151172000$69.95$2.12
Oct 2024Arcadia Operating,1490000$71.99$2.20
Sep 2024Arcadia Operating,154156000$70.24$2.28
Aug 2024Arcadia Operating,14917938380$76.68$1.99
Jul 2024Arcadia Operating,92164000$81.80$2.07
Jun 2024Arcadia Operating,171159000$79.77$2.54
May 2024Arcadia Operating,143180000$80.02$2.12
Apr 2024Arcadia Operating,196177000$85.35$1.60
Mar 2024Arcadia Operating,193185000$81.28$1.49
Feb 2024Arcadia Operating,151171000$77.25$1.72
Jan 2024Arcadia Operating,202189000$74.15$3.18
Dec 2023Arcadia Operating,158187000$71.90$2.52
Nov 2023Arcadia Operating,1560000$77.69$2.71
Oct 2023Arcadia Operating,162177000$85.64$2.98
Sep 2023Arcadia Operating,161362000$89.43$2.64
Aug 2023Arcadia Operating,158181000$81.39$2.58

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

How to check your stub against this lease Checks stopped on this lease? See the likely reasons

Do your checks match this lease?

Check my statement

Nearby

This lease belongs to

OperatorIV Standard, LLCFieldAce, North (4850)CountyPolk County

IV Standard, LLC in Polk County

All IV Standard, LLC leases →

Ace, North (4850) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km