Skip to content
Royalty Clerk

Texas oil lease

Producing

GUAJILLO-IDYLWOOD SA3

Guajillo-Idylwood Sa3 is an oil lease in Live Oak County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-2) field.

1 well

33,386bbl oil, last 12 months−65% vs prior year
Operator
Marathon Oil Ef LLC
County
Live Oak County
Field
Eagleville (Eagle Ford-2)
RRC lease
02-12879

Is your check right?

Check my statement

Where it sits

This county

Live Oak CountyLive OakAtascosaGoliadMcMullenKarnesSan PatricioBeeLive Oak County
Live Oak County
Gas, last 12 months
125,624 mcf
Oil in Jul 2026
2,160 bbl

Production by month

Oil output fell 65% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 65% over the last 12 monthsMonthly oil production and gas for GUAJILLO-IDYLWOOD SA3, Jun 2024 to Jul 2026. Oil output fell 65% over the last 12 months. 33,386 bbl in the 12 months through Jul 2026, against 94,492 bbl in the 12 months before.Last 12 months: 33,386 bblbbl per monthmcf per month0010k10k20k20k30k30k40k40k50k50kJul 24OctJan 25AprJulOctJan 26AprJul
Oil output fell 65% over the last 12 monthsMonthly oil production and gas for GUAJILLO-IDYLWOOD SA3, Jun 2024 to Jul 2026. Oil output fell 65% over the last 12 months. 33,386 bbl in the 12 months through Jul 2026, against 94,492 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0010k10k20k20k30k30k40k40k50k50kJul 24Jan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

69% of the gas went to a processing plant in the last 12 months

Flaring peaked at 4.3% of the gas in Aug 2025.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
69% of the gas went to a processing plant in the last 12 monthsShare of GUAJILLO-IDYLWOOD SA3 gas by disposition code each month, Jun 2024 to Jul 2026. 69% of the gas went to a processing plant in the last 12 months. Flaring peaked at 4.3% of the gas in Aug 2025.Share of the lease’s gas by disposition code, per month0%50%100%Flared 4.3%Jul 24OctJan 25AprJulOctJan 26AprJul
69% of the gas went to a processing plant in the last 12 monthsShare of GUAJILLO-IDYLWOOD SA3 gas by disposition code each month, Jun 2024 to Jul 2026. 69% of the gas went to a processing plant in the last 12 months. Flaring peaked at 4.3% of the gas in Aug 2025.Share of gas by disposition code0%50%100%Flared 4.3%Jul 24Jan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    69% · 87,290 mcf

  • Lease fuel (1)

    29% · 35,994 mcf

  • Flared (4)

    1.9% · 2,340 mcf

1.9% of the gas flared in the last 12 months. 4 months above 3%.

1 well on this lease

Wells on GUAJILLO-IDYLWOOD SA3
API numberWell no.Status
42-297-364183HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Harvest Midstream CompanyOilGathers25Jun 5, 2024
Shell Trading (Us) CompanyOilGathers25Jun 5, 2024
Statewide Crude Inc.OilGathers25Jun 5, 2024
Valero Marketing and Supply Co.OilGathers25Jun 5, 2024
Marathon Oil Ef LLCCasinghead gasBuys100Jun 5, 2024
Marathon Oil Ef LLCCasinghead gasGathers100Jun 5, 2024

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

Who buys my oilOil price check

1,118.22 acres on the newest permit

  • Worth asking

    An allocation well is on this lease

    A well drilled across several tracts shares its production by an allocation formula, so the decimal is not always your acres over the unit acres. Ask the operator for the allocation formula and the tract factor for 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 Guajillo-Idylwood Sa3
API numberWell no.Acreson the permit
42-297-364183H1,118.22

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

Unit decimal checker

What ConocoPhillips told investors it received

Marathon Oil Ef LLC is linked to ConocoPhillips (MRO).
Realized prices reported by ConocoPhillips
QuarterOil$ per bblFiling
Q2 2026$99.40SEC filing
Q1 2026$73.47SEC filing
Q3 2025$66.13SEC filing
Q2 2025$64.23SEC filing
Q1 2025$71.65SEC filing

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

Estimate your royalty

26 months, newest first

Ledger for GUAJILLO-IDYLWOOD SA3
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20262,1602,1767,4614,88690$80.46$2.89
Jun 20262,3812,3638,2035,49583$84.81$3.15
May 20261,8591,8668,1995,720137$102.13$2.94
Apr 20262,3122,3318,7746,27076$100.32$2.77
Mar 20262,0502,0886,6554,540136$91.38$3.04
Feb 20263,4583,42011,1937,955134$64.51$3.62
Jan 20264,4764,45514,82810,41398$60.04$7.72
Dec 20254,3324,29713,0909,45193$57.97$4.26
Nov 20252,0332,03712,4848,698445$60.06$3.79
Oct 20252,2512,26211,7238,615166$60.89$3.19
Sep 20252,7592,75611,1057,693375$63.96$2.97
Aug 20253,3153,32611,9097,554507$64.86$2.91
Jul 20253,8593,85112,0997,559226$68.39$3.20
Jun 20253,7643,77010,4706,335286$68.17$3.02
May 20254,1004,13110,4046,344266$62.17$3.12
Apr 20254,6694,64011,2257,061227$63.54$3.42
Mar 20255,1885,18912,8408,339262$68.24$4.12
Feb 20255,2155,23814,5219,461182$71.53$4.19
Jan 20256,6056,56518,30711,835582$75.74$4.13
Dec 20247,9577,96022,76115,339434$70.12$3.01
Nov 20248,7238,71623,07516,210403$69.95$2.12
Oct 202411,57011,60230,28922,322476$71.99$2.20
Sep 202414,03514,08435,79727,335575$70.24$2.28
Aug 202418,80718,83740,72131,488416$76.68$1.99
Jul 202430,18430,18648,59138,307417$81.80$2.07
Jun 202428,24628,10537,32927,616618$79.77$2.54

Flared above 3%

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

OperatorMarathon Oil Ef LLCFieldEagleville (Eagle Ford-2)CountyLive Oak County

Marathon Oil Ef LLC in Live Oak County

All Marathon Oil Ef LLC leases →

Eagleville (Eagle Ford-2) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km