Skip to content
Royalty Clerk

Texas oil lease

Producing

MARY 18

Mary 18 is an oil lease in Upton County, Texas, operated by Pioneer Natural Res. USA, Inc. in the Spraberry (Trend Area) R 40 Exc field.

8 wells

5,824bbl oil, last 12 months−32% vs prior year
Operator
Pioneer Natural Res. USA, Inc.
County
Upton County
Field
Spraberry (Trend Area) R 40 Exc
RRC lease
7C-18593

Is your check right?

Check my statement

Where it sits

This county

Upton CountyUptonMidlandCraneGlasscockReaganEctorUpton County
Upton County
Gas, last 12 months
62,465 mcf
Oil in Jul 2026
674 bbl

Production by month

Oil output fell 32% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 32% over the last 12 monthsMonthly oil production and gas for MARY 18, Aug 2023 to Jul 2026. Oil output fell 32% over the last 12 months. 5,824 bbl in the 12 months through Jul 2026, against 8,572 bbl in the 12 months before.Last 12 months: 5,824 bblbbl per monthmcf per month005005,0001,00010k1,50015k2,00020k2,50025kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 32% over the last 12 monthsMonthly oil production and gas for MARY 18, Aug 2023 to Jul 2026. Oil output fell 32% over the last 12 months. 5,824 bbl in the 12 months through Jul 2026, against 8,572 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005005,0001,00010k1,50015k2,00020k2,50025kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

92% of the gas went to a processing plant in the last 12 months

Flaring peaked at 7.3% of the gas in Jan 2026.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
92% of the gas went to a processing plant in the last 12 monthsShare of MARY 18 gas by disposition code each month, Aug 2023 to Jul 2026. 92% of the gas went to a processing plant in the last 12 months. Flaring peaked at 7.3% of the gas in Jan 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 7.3%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
92% of the gas went to a processing plant in the last 12 monthsShare of MARY 18 gas by disposition code each month, Aug 2023 to Jul 2026. 92% of the gas went to a processing plant in the last 12 months. Flaring peaked at 7.3% of the gas in Jan 2026.Share of gas by disposition code0%50%100%Flared 7.3%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    92% · 57,290 mcf

  • Lease fuel (1)

    6.9% · 4,296 mcf

  • Flared (4)

    1.4% · 879 mcf

1.4% of the gas flared in the last 12 months. 4 months above 3%.

Who has run this lease

The operator changed once, most recently in Feb 2021

Operators of this lease over timeParsley Energy Operations, LLC, Jan 2020 to Jan 2021; Pioneer Natural Res. USA, Inc., Feb 2021 to Jul 20262020202120222023202420252026Changed Feb 2021Parsley Energy Operations, LLCJan 2020 to Jan 2021Pioneer Natural Res. USA, Inc.Feb 2021 to now
Operators of this lease over timeParsley Energy Operations, LLC, Jan 2020 to Jan 2021; Pioneer Natural Res. USA, Inc., Feb 2021 to Jul 20262020202120222023202420252026Changed Feb 2021Parsley Energy Operations, LLCJan 2020 to Jan 2021Pioneer Natural Res. USA, Inc.Feb 2021 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

8 wells on this lease

Wells on MARY 18
API numberWell no.Status
42-461-388661Shut-in
42-461-390293Active
42-461-391924Shut-in
42-461-392155Active
42-461-393347Active
42-461-394318Active
42-461-395251HBActive
42-461-401984208HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Medallion Operating Company, LLCOilGathers50Jul 1, 2015
Shell Trading (Us) CompanyOilGathers50Jul 1, 2015
Targa Pipeline Mid-Continent LLCCasinghead gasBuys100Jul 1, 2015
Targa Pipeline Mid-Continent LLCCasinghead gasGathers100Jul 1, 2015

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

Who buys my oilOil price check

498.60 acres on the newest permit

The wells on this lease state different acreage

The permits state between 498.6 and 663.8 acres.

8 wells are listed on this lease

Permits for Mary 18
API numberWell no.Acreson the permit
42-461-401984208H498.60
42-461-395251HB663
42-461-394318500.13
42-461-393347500.13
42-461-388661663
42-461-392155500.13
42-461-391924663.80
42-461-390293663

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

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for MARY 18
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Pioneer Natural67463311,69511,0040$80.46$2.89
Jun 2026Pioneer Natural4094244,5894,23318$84.81$3.15
May 2026Pioneer Natural4284054,9884,4300$102.13$2.94
Apr 2026Pioneer Natural3553644,5894,21915$100.32$2.77
Mar 2026Pioneer Natural4564595,2424,76929$91.38$3.04
Feb 2026Pioneer Natural2653122,3642,03079$64.51$3.62
Jan 2026Pioneer Natural5325374,2843,545312$60.04$7.72
Dec 2025Pioneer Natural6676104,8154,5780$57.97$4.26
Nov 2025Pioneer Natural3423878268000$60.06$3.79
Oct 2025Pioneer Natural6526934,2773,930135$60.89$3.19
Sep 2025Pioneer Natural4764447,1156,569175$63.96$2.97
Aug 2025Pioneer Natural5685767,6817,183116$64.86$2.91
Jul 2025Pioneer Natural7457326,4516,11726$68.39$3.20
Jun 2025Pioneer Natural5845416,0275,7680$68.17$3.02
May 2025Pioneer Natural5825734,2784,0660$62.17$3.12
Apr 2025Pioneer Natural3293423,2713,1141$63.54$3.42
Mar 2025Pioneer Natural5525904,5824,3400$68.24$4.12
Feb 2025Pioneer Natural9699466,4035,97726$71.53$4.19
Jan 2025Pioneer Natural7457406,0535,7141$75.74$4.13
Dec 2024Pioneer Natural99199712,08611,4530$70.12$3.01
Nov 2024Pioneer Natural93494313,10112,4660$69.95$2.12
Oct 2024Pioneer Natural8298108,2997,80230$71.99$2.20
Sep 2024Pioneer Natural7267326,9846,486147$70.24$2.28
Aug 2024Pioneer Natural58661011,98011,42419$76.68$1.99
Jul 2024Pioneer Natural1,0031,00121,98121,2910$81.80$2.07
Jun 2024Pioneer Natural9991,02119,23818,5890$79.77$2.54
May 2024Pioneer Natural1,1121,08318,41517,76621$80.02$2.12
Apr 2024Pioneer Natural1,0071,03111,60211,026182$85.35$1.60
Mar 2024Pioneer Natural1,2051,23514,71414,2700$81.28$1.49
Feb 2024Pioneer Natural1,04797813,00312,031537$77.25$1.72
Jan 2024Pioneer Natural1,0331,04914,44614,01430$74.15$3.18
Dec 2023Pioneer Natural1,2001,2018,5688,26817$71.90$2.52
Nov 2023Pioneer Natural1,0059697,9427,7060$77.69$2.71
Oct 2023Pioneer Natural9931,01710,83110,49035$85.64$2.98
Sep 2023Pioneer Natural1,5751,92218,97218,3610$89.43$2.64
Aug 2023Pioneer Natural1,5431,71116,76116,11958$81.39$2.58

Flared above 3%

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Sep 28, 2026.

How to check your stub against this lease

Do your checks match this lease?

Check my statement

Nearby

This lease belongs to

OperatorPioneer Natural Res. USA, Inc.FieldSpraberry (Trend Area) R 40 ExcCountyUpton County

Pioneer Natural Res. USA, Inc. in Upton County

All Pioneer Natural Res. USA, Inc. leases →

Spraberry (Trend Area) R 40 Exc field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km