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Texas oil lease

Producing

SAN MARCOS UNIT

San Marcos Unit is an oil lease in Atascosa County, Texas, operated by Javelin Energy Partners Mgmt LLC in the Briscoe Ranch (Eagleford) field.

2 wells

2,339bbl oil, last 12 months+13% vs prior year
Operator
Javelin Energy Partners Mgmt LLC
County
Atascosa County
Field
Briscoe Ranch (Eagleford)
RRC lease
01-18430

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Where it sits

This county

Atascosa CountyAtascosaWilsonMedinaKarnesFrioBexarAtascosa County
Atascosa County
Gas, last 12 months
394 mcf
Oil in Jul 2026
488 bbl

Checks stopped on this lease?

  • Buyer

    Buyer changed: CRESCENT ENERGY MARKETING, LLC replaced JAVELIN MARKETING, LLC as the buyer of this lease's gas from oil wells on Aug 1, 2026.

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

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Production by month

Oil output rose 13% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output rose 13% over the last 12 monthsMonthly oil production and gas for SAN MARCOS UNIT, Aug 2023 to Jul 2026. Oil output rose 13% over the last 12 months. 2,339 bbl in the 12 months through Jul 2026, against 2,069 bbl in the 12 months before.Last 12 months: 2,339 bblbbl per monthmcf per month002502005004007506001,000800Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 13% over the last 12 monthsMonthly oil production and gas for SAN MARCOS UNIT, Aug 2023 to Jul 2026. Oil output rose 13% over the last 12 months. 2,339 bbl in the 12 months through Jul 2026, against 2,069 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002502005004007506001,000800Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Jan 2024 the lease's gas goes to a transmission line instead of lease fuel

Flaring peaked at 100.0% of the gas in May 2026.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
Since Jan 2024 the lease's gas goes to a transmission line instead of lease fuelShare of SAN MARCOS UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Jan 2024 the lease's gas goes to a transmission line instead of lease fuel. Flaring peaked at 100.0% of the gas in May 2026.Share of the lease’s gas by disposition code, per month0%50%100%Jan 2024: fuel to lineFlared 100.0%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Jan 2024 the lease's gas goes to a transmission line instead of lease fuelShare of SAN MARCOS UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Jan 2024 the lease's gas goes to a transmission line instead of lease fuel. Flaring peaked at 100.0% of the gas in May 2026.Share of gas by disposition code0%50%100%Jan 24: fuel to lineFlared 100.0%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    51% · 769 mcf

  • Flared (4)

    35% · 521 mcf

  • Lease fuel (1)

    14% · 214 mcf

34.6% of the gas flared in the last 12 months. 19 months above 3%.

Who has run this lease

The operator changed once, most recently in Apr 2022

Operators of this lease over timeVenado Operating Company LLC, Jan 2020 to Mar 2022; Javelin Energy Partners Mgmt LLC, Apr 2022 to Jul 20262020202120222023202420252026Changed Apr 2022Venado Operating Company LLCJan 2020 to Mar 2022Javelin Energy Partners Mgmt…Apr 2022 to now
Operators of this lease over timeVenado Operating Company LLC, Jan 2020 to Mar 2022; Javelin Energy Partners Mgmt LLC, Apr 2022 to Jul 20262020202120222023202420252026Changed Apr 2022Venado Operating Company LLCJan 2020 to Mar 2022Javelin Energy Partners Mgmt LLCApr 2022 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

2 wells on this lease

Wells on SAN MARCOS UNIT
API numberWell no.Status
42-013-352631HActive
42-013-352642HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Plains Marketing, L.p.OilGathers80Aug 1, 2026–
Harvest Marketing & Trading, LLCOilGathers10Dec 1, 2023–
Shell Trading (Us) CompanyOilGathers10Aug 1, 2026–
Crescent Energy Marketing, LLCCasinghead gasBuys100Aug 1, 2026–
Targa Midstream Services LLCCasinghead gasGathers100Jan 1, 2023–
Javelin Marketing, LLCCasinghead gasBuys100Dec 1, 2023Aug 1, 2026
Enterprise Crude Oil LLCOilGathers10Dec 1, 2023Aug 1, 2026
Shell Trading (Us) CompanyOilGathers80Dec 1, 2023Aug 1, 2026
Tenaska Marketing VenturesCasinghead gasBuys100Jan 1, 2023Dec 1, 2023
Eastex Crude Company, LLCOilGathers100Jan 1, 2023Dec 1, 2023
Bp Products North America Inc.OilGathers20Oct 30, 2019Jan 1, 2023

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

Who buys my oilOil price check

613.51 acres on the newest permit

  • Good to know

    The wells on this lease state different acreage

    The permits state between 613.51 and 640 acres. Use the acres from your own division order for the well you are paid on.

Check your decimal on this lease
Permits for San Marcos Unit
API numberWell no.Acreson the permit
42-013-352631H640
42-013-352642H613.51

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

Unit decimal checker

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36 months, newest first

Ledger for SAN MARCOS UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Javelin Energy488635000$80.46$2.89
Jun 2026Javelin Energy4353011260126$84.81$3.15
May 2026Javelin Energy50948557057$102.13$2.94
Apr 2026Javelin Energy553657107029$100.32$2.77
Mar 2026Javelin Energy17016343036$91.38$3.04
Feb 2026Javelin Energy30000$64.51$3.62
Jan 2026Javelin Energy00000$60.04$7.72
Dec 2025Javelin Energy0169700$57.97$4.26
Nov 2025Javelin Energy82030255$60.06$3.79
Oct 2025Javelin Energy990000$60.89$3.19
Sep 2025Javelin Energy002403$63.96$2.97
Aug 2025Javelin Energy00000$64.86$2.91
Jul 2025Javelin Energy001181180$68.39$3.20
Jun 2025Javelin Energy24715823420421$68.17$3.02
May 2025Javelin Energy00550$62.17$3.12
Apr 2025Javelin Energy00000$63.54$3.42
Mar 2025Javelin Energy53766330619195$68.24$4.12
Feb 2025Javelin Energy815983447226149$71.53$4.19
Jan 2025Javelin Energy233068491$75.74$4.13
Dec 2024Javelin Energy00000$70.12$3.01
Nov 2024Javelin Energy00000$69.95$2.12
Oct 2024Javelin Energy00000$71.99$2.20
Sep 2024Javelin Energy10000$70.24$2.28
Aug 2024Javelin Energy23632417714730$76.68$1.99
Jul 2024Javelin Energy510440340139201$81.80$2.07
Jun 2024Javelin Energy492456346212129$79.77$2.54
May 2024Javelin Energy698842439176128$80.02$2.12
Apr 2024Javelin Energy3823222204479$85.35$1.60
Mar 2024Javelin Energy50349538320086$81.28$1.49
Feb 2024Javelin Energy60255035021536$77.25$1.72
Jan 2024Javelin Energy589919397245111$74.15$3.18
Dec 2023Javelin Energy65152640614233$71.90$2.52
Nov 2023Javelin Energy658480521188131$77.69$2.71
Oct 2023Javelin Energy6547474433040$85.64$2.98
Sep 2023Javelin Energy5854824414321$89.43$2.64
Aug 2023Javelin Energy5586775865790$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

OperatorJavelin Energy Partners Mgmt LLCFieldBriscoe Ranch (Eagleford)CountyAtascosa County

Javelin Energy Partners Mgmt LLC in Atascosa County

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Briscoe Ranch (Eagleford) field

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