Skip to content
Royalty Clerk

Texas oil lease

Producing

MASK HZ UNIT

Mask HZ Unit is an oil lease in Midland County, Texas, operated by Cog Operating LLC in the Spraberry (Trend Area) field.

22 wells

90,542bbl oil, last 12 months−58% vs prior year
Operator
Cog Operating LLC
County
Midland County
Field
Spraberry (Trend Area)
RRC lease
08-48498

Is your check right?

Check my statement

Where it sits

This county

Midland CountyMidlandMartinAndrewsGlasscockHowardEctorMidland County
Midland County
Gas, last 12 months
271,233 mcf
Oil in Jun 2026
5,686 bbl

Checks stopped on this lease?

  • Buyer

    Buyer changed: ONEOK MIDLAND MIDSTREAM, LLC replaced CORONADO MIDSTREAM LLC as the buyer of this lease's gas from oil wells on Apr 1, 2026.

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

See why checks stop on this lease

Production by month

Oil output fell 58% over the last 12 months

Jul 2026 was not reported.

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 58% over the last 12 monthsMonthly oil production and gas for MASK HZ UNIT, Aug 2023 to Jul 2026. Oil output fell 58% over the last 12 months. 76,242 bbl in the 12 months through Jul 2026, against 182,495 bbl in the 12 months before.Last 12 months: 76,242 bblbbl per monthmcf per month0010k25k20k50k30k75k40k100kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 58% over the last 12 monthsMonthly oil production and gas for MASK HZ UNIT, Aug 2023 to Jul 2026. Oil output fell 58% over the last 12 months. 76,242 bbl in the 12 months through Jul 2026, against 182,495 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0010k25k20k50k30k75k40k100kJan 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 4.7% of the gas in Sep 2023.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
99% of the gas went to a processing plant in the last 12 monthsShare of MASK HZ UNIT 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 4.7% of the gas in Sep 2023.Share of the lease’s gas by disposition code, per month0%50%100%Flared 4.7%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
99% of the gas went to a processing plant in the last 12 monthsShare of MASK HZ UNIT 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 4.7% of the gas in Sep 2023.Share of gas by disposition code0%50%100%Flared 4.7%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    99% · 297,499 mcf

  • Lease fuel (1)

    0.8% · 2,261 mcf

22 wells on this lease

Wells on MASK HZ UNIT
API numberWell no.Status
42-329-406931004HShut-in
42-329-406941005HActive
42-329-406951006HActive
42-329-406961007HActive
42-329-412671008HActive
42-329-412691009HActive
42-329-421091010HActive
42-329-421121011HActive
42-329-422151014HActive
42-329-422301015HActive
42-329-422311016HShut-in
42-329-471221001BHShut-in
42-329-471231001JHShut-in
42-329-471241002LHShut-in
42-329-471251003BHShut-in
42-329-471261003JHActive
42-329-471271004LHActive
42-329-471281004MHActive
42-329-471291006JHActive
42-329-471311008JHActive
42-329-471321008MHActive
42-329-478091007LRActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Energy Transfer CompanyOilGathers100Apr 1, 2025–
Oneok Midland Midstream, LLCCasinghead gasBuys100Apr 1, 2026–
Enlink Permian, LLCCasinghead gasGathers100Apr 1, 2025–
Coronado Midstream LLCCasinghead gasBuys100Jun 27, 2016Apr 1, 2026
Enlink North Texas Gathering, LPCasinghead gasGathers100Jun 27, 2016Apr 1, 2025
Bridger Transportation, LLCOilGathers50Jun 27, 2016Apr 1, 2025
Centurion Pipeline L.p.OilGathers50Jun 27, 2016Apr 1, 2025

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

Who buys my oilOil price check

1,294.70 acres on the newest permit

  • Good to know

    22 wells are listed on this lease

    Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.

  • 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 Mask HZ Unit
API numberWell no.Acreson the permit
42-329-478091007LR1,294.70
42-329-471221001BH1,294.70
42-329-471231001JH1,294.70
42-329-471241002LH1,294.70
42-329-471251003BH1,294.70
42-329-471261003JH1,294.70
42-329-471271004LH1,294.70
42-329-471281004MH1,294.70
42-329-471291006JH1,294.70
42-329-471321008MH1,294.70
42-329-471311008JH1,294.70
42-329-422151014H1,294.70

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

Unit decimal checker

What ConocoPhillips told investors it received

Cog Operating LLC is linked to ConocoPhillips (COP).
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
Q3 2024$76.77SEC filing

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

Estimate your royalty

36 months, newest first

Ledger for MASK HZ UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026No report filed–––––$80.46$2.89
Jun 20265,6865,7539,3239,3220$84.81$3.15
May 20267,5997,9518,8678,3700$102.13$2.94
Apr 20262,9852,8574894890$100.32$2.77
Mar 20260021210$91.38$3.04
Feb 202600000$64.51$3.62
Jan 20265,4435,8426,6156,3920$60.04$7.72
Dec 20257,7607,75017,13816,9150$57.97$4.26
Nov 202513,02213,27235,69935,4830$60.06$3.79
Oct 202513,90813,58049,16148,9380$60.89$3.19
Sep 20257,6887,72245,56645,3500$63.96$2.97
Aug 202512,15112,46385,18084,9570$64.86$2.91
Jul 202514,30014,19713,17412,9510$68.39$3.20
Jun 202515,39915,29328,52728,3110$68.17$3.02
May 202517,56917,64333,75333,5300$62.17$3.12
Apr 202513,63613,50925,53825,3220$63.54$3.42
Mar 202514,06114,08334,78634,5630$68.24$4.12
Feb 202512,04312,15030,99030,7880$71.53$4.19
Jan 202514,10913,89136,98836,7650$75.74$4.13
Dec 202414,51414,41039,29939,0760$70.12$3.01
Nov 202412,69513,29438,33738,1210$69.95$2.12
Oct 202417,73917,78634,22434,0010$71.99$2.20
Sep 202418,20917,92130,32730,1110$70.24$2.28
Aug 202418,22118,08839,50739,2840$76.68$1.99
Jul 202415,77616,12943,70743,4840$81.80$2.07
Jun 202417,95017,63738,31537,0991,000$79.77$2.54
May 202413,20513,383000$80.02$2.12
Apr 202415,41515,45736,81136,5950$85.35$1.60
Mar 202417,23317,09932,75432,5310$81.28$1.49
Feb 202414,65614,73329,21229,0030$77.25$1.72
Jan 202419,08819,00539,45539,2320$74.15$3.18
Dec 202318,32418,08431,65431,4310$71.90$2.52
Nov 202318,53318,29928,43228,2160$77.69$2.71
Oct 202319,24419,37839,45439,2310$85.64$2.98
Sep 202321,50621,53842,12839,9221,990$89.43$2.64
Aug 202325,40025,38851,21950,9960$81.39$2.58

No report filed 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

OperatorCog Operating LLCFieldSpraberry (Trend Area)CountyMidland County

Cog Operating LLC in Midland County

All Cog Operating LLC leases →

Spraberry (Trend Area) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km