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Texas oil lease

Producing

I.V. MONTALVO 'A'

I.v. Montalvo 'A' is an oil lease in Starr County, Texas, operated by Killam Oil Co., Ltd. in the Sun, North (F-3-G) field.

Oil lease dossier

2,390bbl oil, since Feb 2026
Operator
Killam Oil Co., Ltd.
County
Starr County
Field
Sun, North (F-3-G)
RRC lease
04-14274

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Where it sits

This county

Starr CountyStarrBrooksJim HoggZapataHidalgoStarr County
Starr County
Gas, since Feb 2026
16,765 mcf
Oil in Jul 2026
200 bbl
First check

Production started February 2026; the first check is due by about June 28, 2026 (estimate).

When is my first royalty check due?

Production by month

Oil output fell 83% since Feb 2026

  • Oil (bars)
  • Gas (line)
Oil output fell 83% since Feb 2026Monthly oil production and gas for I.V. MONTALVO 'A', Feb 2026 to Jul 2026. Oil output fell 83% since Feb 2026. Monthly average of 115 bbl in the latest 3 months, against 682 bbl in the first 3.bbl per monthmcf per month002002,0004004,0006006,0008008,000Oct 25Jan 26AprJul
Oil output fell 83% since Feb 2026Monthly oil production and gas for I.V. MONTALVO 'A', Feb 2026 to Jul 2026. Oil output fell 83% since Feb 2026. Monthly average of 115 bbl in the latest 3 months, against 682 bbl in the first 3.bbl per monthmcf per month002002,0004004,0006006,0008008,000Jan 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 6 months reported

All of the gas went to a transmission line in the 6 months reportedShare of I.V. MONTALVO 'A' gas by disposition code each month, Feb 2026 to Jul 2026. All of the gas went to a transmission line in the 6 months reported.Share of the lease’s gas by disposition code, per month0%50%100%Oct 25Jan 26AprJul
All of the gas went to a transmission line in the 6 months reportedShare of I.V. MONTALVO 'A' gas by disposition code each month, Feb 2026 to Jul 2026. All of the gas went to a transmission line in the 6 months reported.Share of gas by disposition code0%50%100%Jan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Wells on this lease

No wells are linked to this lease in our data

Production is still reported at lease level.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Gulfmark Energy, Inc.OilGathers100Feb 5, 2026
Killam Oil Co., Ltd.Casinghead gasBuys100Feb 5, 2026
Enterprise Products Operating LLCCasinghead gasGathers100Feb 5, 2026

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

Who buys my oilOil price check

656.11 acres on the newest permit

Check your decimal on this lease
Permits for I.v. Montalvo 'A'
API numberWell no.Acreson the permit
42-427-3476220656.11

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

Unit decimal checker

Estimate your royalty

6 months, newest first

Ledger for I.V. MONTALVO 'A'
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20262001784354350$80.46$2.89
Jun 202622018180$84.81$3.15
May 20261231785245240$102.13$2.94
Apr 20266125403,9283,9280$100.32$2.77
Mar 20267267167,7407,7400$91.38$3.04
Feb 20267076264,1204,1200$64.51$3.62

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

OperatorKillam Oil Co., Ltd.FieldSun, North (F-3-G)CountyStarr County

Killam Oil Co., Ltd. in Starr County

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Sun, North (F-3-G) field

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New drilling permits in Starr County

Newest in the county: this lease has no coordinates.