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Texas oil lease

Producing

GUAJILLO UNIT 16 NORTH

Guajillo Unit 16 North is an oil lease in Atascosa County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-1) field.

4 wells

10,580bbl oil, last 12 months−70% vs prior year
Operator
Marathon Oil Ef LLC
County
Atascosa County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-19500

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Where it sits

This county

Atascosa CountyAtascosaWilsonMedinaKarnesFrioBexarAtascosa County
Atascosa County
Gas, last 12 months
23,184 mcf
Oil in Jul 2026
945 bbl

Production by month

Oil output fell 70% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 70% over the last 12 monthsMonthly oil production and gas for GUAJILLO UNIT 16 NORTH, Aug 2023 to Jul 2026. Oil output fell 70% over the last 12 months. 10,580 bbl in the 12 months through Jul 2026, against 34,870 bbl in the 12 months before.Last 12 months: 10,580 bblbbl per monthmcf per month002,0002,5004,0005,0006,0007,5008,00010kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 70% over the last 12 monthsMonthly oil production and gas for GUAJILLO UNIT 16 NORTH, Aug 2023 to Jul 2026. Oil output fell 70% over the last 12 months. 10,580 bbl in the 12 months through Jul 2026, against 34,870 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002,0002,5004,0005,0006,0007,5008,00010kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Feb 2024 the lease's gas goes to a processing plant instead of lease fuel

Flaring peaked at 5.2% of the gas in Sep 2023.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
Since Feb 2024 the lease's gas goes to a processing plant instead of lease fuelShare of GUAJILLO UNIT 16 NORTH gas by disposition code each month, Aug 2023 to Jul 2026. Since Feb 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 5.2% of the gas in Sep 2023.Share of the lease’s gas by disposition code, per month0%50%100%Feb 2024: fuel to plantFlared 5.2%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Feb 2024 the lease's gas goes to a processing plant instead of lease fuelShare of GUAJILLO UNIT 16 NORTH gas by disposition code each month, Aug 2023 to Jul 2026. Since Feb 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 5.2% of the gas in Sep 2023.Share of gas by disposition code0%50%100%Feb 24: fuel to plantFlared 5.2%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    69% · 15,939 mcf

  • Lease fuel (1)

    29% · 6,683 mcf

  • Flared (4)

    2.4% · 562 mcf

2.4% of the gas flared in the last 12 months. 7 months above 3%.

4 wells on this lease

Wells on GUAJILLO UNIT 16 NORTH
API numberWell no.Status
42-013-354761HActive
42-013-354772HActive
42-013-354783HActive
42-013-354794HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Enterprise Crude Oil LLCOilGathers25Jul 1, 2022–
Harvest Midstream CompanyOilGathers25Jul 1, 2022–
Reynolds Energy Transport LLCOilGathers25Jul 1, 2022–
Trafigura Trading LLCOilGathers25Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasBuys100Nov 15, 2018–
Marathon Oil Ef LLCCasinghead gasGathers100Nov 15, 2018–
Enterprise Crude Oil LLCOilGathers1Nov 15, 2018Jul 1, 2022
Gulfmark Energy, Inc.OilGathers1Nov 15, 2018Jul 1, 2022
Harvest Midstream CompanyOilGathers97Nov 15, 2018Jul 1, 2022
Trafigura Trading LLCOilGathers1Nov 15, 2018Jul 1, 2022

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

Who buys my oilOil price check

237.27 acres on the newest permit

  • 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 Unit 16 North
API numberWell no.Acreson the permit
42-013-354772H237.27
42-013-354783H237.27
42-013-354794H237.27
42-013-354761H237.27

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

36 months, newest first

Ledger for GUAJILLO UNIT 16 NORTH
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20269459261,9791,29624$80.46$2.89
Jun 20262112151,31588113$84.81$3.15
May 20263263511,4671,02424$102.13$2.94
Apr 20261,3091,2931,8711,33716$100.32$2.77
Mar 202648449184572$91.38$3.04
Feb 20267637394433155$64.51$3.62
Jan 20261331383572512$60.04$7.72
Dec 20255355371781291$57.97$4.26
Nov 20257347421,07975238$60.06$3.79
Oct 20251,2761,2914,7233,47167$60.89$3.19
Sep 20252,2232,2104,8113,333162$63.96$2.97
Aug 20251,6411,6374,8773,093208$64.86$2.91
Jul 20251,1891,2025,6493,529106$68.39$3.20
Jun 20252,6262,6376,9944,232191$68.17$3.02
May 20253,4303,4479,1345,570233$62.17$3.12
Apr 20253,3913,3644,3602,74388$63.54$3.42
Mar 20253,1403,1375,2843,432108$68.24$4.12
Feb 20252,7752,7842,7811,81335$71.53$4.19
Jan 20253,2673,2503,1612,044101$75.74$4.13
Dec 20244,6044,5977,0954,783135$70.12$3.01
Nov 20242,7052,7003,0732,15954$69.95$2.12
Oct 20242,5012,5121,8591,37129$71.99$2.20
Sep 20244,0073,9973,6682,80259$70.24$2.28
Aug 20241,2351,2381,21694112$76.68$1.99
Jul 20242,1912,1923,3972,67929$81.80$2.07
Jun 20242,2712,3043,6372,69160$79.77$2.54
May 20244,0414,0367,1923,978184$80.02$2.12
Apr 20243,7613,7585,9863,020210$85.35$1.60
Mar 20243,7793,7696,3963,70971$81.28$1.49
Feb 20243,5023,5106,1623,199123$77.25$1.72
Jan 20243,6233,6315,6602,301182$74.15$3.18
Dec 20233,8163,8126,7603,373171$71.90$2.52
Nov 20233,9313,9358,1604,775182$77.69$2.71
Oct 20236,0896,0937,7474,506231$85.64$2.98
Sep 20236,2756,2708,1294,650422$89.43$2.64
Aug 20235,6335,6196,0292,891157$81.39$2.58

Flared above 3%

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

OperatorMarathon Oil Ef LLCFieldEagleville (Eagle Ford-1)CountyAtascosa County

Marathon Oil Ef LLC in Atascosa County

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Eagleville (Eagle Ford-1) field

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