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Texas oil lease

Producing

MARY 18B

Mary 18B is an oil lease in Upton County, Texas, operated by Pioneer Natural Res. USA, Inc. in the Spraberry (Trend Area) field.

1 well

69,797bbl oil, last 12 months−28% vs prior year
Operator
Pioneer Natural Res. USA, Inc.
County
Upton County
Field
Spraberry (Trend Area)
RRC lease
7C-22059

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Where it sits

This county

Upton CountyUptonMidlandCraneGlasscockReaganEctorUpton County
Upton County
Gas, last 12 months
187,177 mcf
Oil in Jul 2026
77 bbl

Production by month

Oil output fell 28% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 28% over the last 12 monthsMonthly oil production and gas for MARY 18B, Aug 2023 to Jul 2026. Oil output fell 28% over the last 12 months. 69,797 bbl in the 12 months through Jul 2026, against 97,472 bbl in the 12 months before.Last 12 months: 69,797 bblbbl per monthmcf per month005,0005,00010k10k15k15k20k20k25k25kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 28% over the last 12 monthsMonthly oil production and gas for MARY 18B, Aug 2023 to Jul 2026. Oil output fell 28% over the last 12 months. 69,797 bbl in the 12 months through Jul 2026, against 97,472 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005,0005,00010k10k15k15k20k20k25k25kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

99% of the gas went to a processing plant in the last 12 months

Flaring peaked at 61.3% of the gas in Jul 2026.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
99% of the gas went to a processing plant in the last 12 monthsShare of MARY 18B gas by disposition code each month, Aug 2023 to Jul 2026. 99% of the gas went to a processing plant in the last 12 months. Flaring peaked at 61.3% of the gas in Jul 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 61.3%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
99% of the gas went to a processing plant in the last 12 monthsShare of MARY 18B gas by disposition code each month, Aug 2023 to Jul 2026. 99% of the gas went to a processing plant in the last 12 months. Flaring peaked at 61.3% of the gas in Jul 2026.Share of gas by disposition code0%50%100%Flared 61.3%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    99% · 186,170 mcf

  • Flared (4)

    0.4% · 761 mcf

  • Lease fuel (1)

    0.1% · 246 mcf

0.4% of the gas flared in the last 12 months. One month above 3%.

1 well on this lease

Wells on MARY 18B
API numberWell no.Status
42-461-423422HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Medallion Operating Company, LLCOilGathers100Jun 5, 2023
Targa Pl Mid-Cont Westtex LLCCasinghead gasBuys100Jun 5, 2023
Targa Pl Mid-Cont Westtex LLCCasinghead gasGathers100Jun 5, 2023

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

Who buys my oilOil price check

650.70 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 Mary 18B
API numberWell no.Acreson the permit
42-461-423422H650.70

SourceRailroad Commission drilling permits, Sep 26, 2026 (source 1, source 2).

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for MARY 18B
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202677241489175300$80.46$2.89
Jun 20264,0604,01013,26813,2430$84.81$3.15
May 20266,3756,38919,94919,816109$102.13$2.94
Apr 20266,5806,58417,13617,1100$100.32$2.77
Mar 20266,6326,75115,66015,60634$91.38$3.04
Feb 20263,7123,65710,0609,869172$64.51$3.62
Jan 20266,9606,95021,21021,14738$60.04$7.72
Dec 20257,6607,62719,81419,77319$57.97$4.26
Nov 20256,9537,04317,27017,2459$60.06$3.79
Oct 20257,1487,03020,19720,16710$60.89$3.19
Sep 20258,3468,32719,14119,07150$63.96$2.97
Aug 20255,2945,33612,98312,94820$64.86$2.91
Jul 20255,8645,89713,77513,7572$68.39$3.20
Jun 20256,7436,70418,04517,97056$68.17$3.02
May 20258,2288,27518,67418,61440$62.17$3.12
Apr 20255,5055,50315,61015,5902$63.54$3.42
Mar 20259,5499,55318,31118,28011$68.24$4.12
Feb 20259,5129,52216,61816,5944$71.53$4.19
Jan 20259,5299,59417,74617,68047$75.74$4.13
Dec 202411,40911,27718,87818,8592$70.12$3.01
Nov 20247,0466,9448,2868,25622$69.95$2.12
Oct 20241,2691,4261,5271,5250$71.99$2.20
Sep 202411,04711,16517,70517,6870$70.24$2.28
Aug 202411,77111,57518,22218,18318$76.68$1.99
Jul 202412,20212,31317,04416,98836$81.80$2.07
Jun 202413,37513,33618,95118,90821$79.77$2.54
May 202410,32410,34211,24711,074158$80.02$2.12
Apr 202416,15016,13318,25918,2410$85.35$1.60
Mar 202412,77612,6589,3159,26045$81.28$1.49
Feb 20244,5664,5005525484$77.25$1.72
Jan 20246,3906,6144,2054,1947$74.15$3.18
Dec 20238,0567,9694,7664,7575$71.90$2.52
Nov 20239,5169,5525,4165,4056$77.69$2.71
Oct 202311,50711,4866,7996,77914$85.64$2.98
Sep 20237,1377,0905,5895,5840$89.43$2.64
Aug 202310,36810,4369,1909,17013$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

OperatorPioneer Natural Res. USA, Inc.FieldSpraberry (Trend Area)CountyUpton County

Pioneer Natural Res. USA, Inc. in Upton County

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Spraberry (Trend Area) field

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