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Royalty Clerk

Texas oil lease · RRC district 7C · Lease 18266

Producing

WINDHAM

Windham is an oil lease in Upton County, Texas, operated by Summit Petroleum LLC in the Spraberry (Trend Area) field. The Railroad Commission shows 3,476 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 2 wells

3,476bbl oil, last 12 months−7% vs prior year
Operator
Summit Petroleum LLC
County
Upton County
Field
Spraberry (Trend Area)
RRC lease
7C-18266

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Where it sits

This county

Upton CountyUptonMidlandCraneGlasscockReaganEctorUpton County
Upton County · RRC district 7COpen Upton County →
Gas, last 12 months
25,333 mcf
Oil in Jul 2026
281 bbl
Reporting to the state
since Jan 2020
Wells
2

Production

Month by month, from the state record

What the Railroad Commission says this oil lease produced. Oil is in barrels (bbl). Gas is in thousand cubic feet (mcf).

Oil output fell 7% over the last 12 months

3,476 bbl in the 12 months through Jul 2026, against 3,719 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Gas (line, right axis)
  • Last 12 months
Oil output fell 7% over the last 12 monthsMonthly oil production and gas for WINDHAM, Aug 2023 to Jul 2026. Oil output fell 7% over the last 12 months. 3,476 bbl in the 12 months through Jul 2026, against 3,719 bbl in the 12 months before.Last 12 months: 3,476 bblbbl per monthmcf per month001001,0002002,0003003,0004004,0005005,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 7% over the last 12 monthsMonthly oil production and gas for WINDHAM, Aug 2023 to Jul 2026. Oil output fell 7% over the last 12 months. 3,476 bbl in the 12 months through Jul 2026, against 3,719 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001001,0002002,0003003,0004004,0005005,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 18266, district 7C. Reported through Jul 2026. The state revises recent months.

Gas disposition

Where the gas went

Every month the operator tells the state where each mcf of gas went, using a code. The code decides how your gas is paid.

Since May 2024 the lease's gas goes to a transmission line instead of a processing plant

Where gas goes decides how it is paid: processed gas can carry plant products and processing fees, gas sold straight to a pipeline usually does not. Flaring peaked at 50.7% of the gas in Jun 2026.

  • Processing plant (3)
  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
Since May 2024 the lease's gas goes to a transmission line instead of a processing plantShare of WINDHAM gas by disposition code each month, Aug 2023 to Jul 2026. Since May 2024 the lease's gas goes to a transmission line instead of a processing plant. Where gas goes decides how it is paid: processed gas can carry plant products and processing fees, gas sold straight to a pipeline usually does not. Flaring peaked at 50.7% of the gas in Jun 2026.Share of the lease’s gas by disposition code, per month0%50%100%May 2024: plant to lineFlared 50.7%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since May 2024 the lease's gas goes to a transmission line instead of a processing plantShare of WINDHAM gas by disposition code each month, Aug 2023 to Jul 2026. Since May 2024 the lease's gas goes to a transmission line instead of a processing plant. Where gas goes decides how it is paid: processed gas can carry plant products and processing fees, gas sold straight to a pipeline usually does not. Flaring peaked at 50.7% of the gas in Jun 2026.Share of gas by disposition code0%50%100%May 24: plant to lineFlared 50.7%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, gas disposition by code, lease 18266, district 7C. Reported through Jul 2026.

Processing plant (3)

Sent to a gas plant that pulls out natural gas liquids. Your statement should show plant products, and may show processing fees.

Transmission line (2)

Sold straight into a pipeline without processing. Processing fees on your statement would be worth asking about.

Lease fuel (1)

Burned to run equipment on the lease. Not sold, so it pays no royalty. A few percent is normal.

Flared (4)

Burned off or vented, not sold. It pays no royalty. More than 3% in a month is worth watching.

Over the last 12 months, 7.1% of the gas was flared. 3 months went above 3%, which we mark in the ledger below.

Operator history

Who has run this lease

The operator runs the wells and pays your royalty. When the operator changes, payments often slip for a month or two.

Summit Petroleum LLC has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeSummit Petroleum LLC, Jan 2020 to Jul 20262020202120222023202420252026Summit Petroleum LLCJan 2020 to nowthrough Jul 2026
Operators of this lease over timeSummit Petroleum LLC, Jan 2020 to Jul 20262020202120222023202420252026Summit Petroleum LLCJan 2020 to nowthrough Jul 2026

SourceTexas Railroad Commission Production Data Query, operator by month. Reported through Jul 2026.

Wells

2 wells on this lease

Every well the Railroad Commission links to oil lease 18266 in district 7C. The API number is the state’s ID for a well.
Wells on WINDHAM
API numberWell no.Status
42-461-331681Active
42-461-38501202Active

SourceTexas Railroad Commission Wellbore Query, district 7C, lease 18266.

Who buys and gathers

Who moves and buys this lease's production

The operator files a Form P-4 with the Railroad Commission naming the companies authorised to gather and buy the oil and gas. The buyer's price is the one your royalty is figured on.

  • Oil

    Plains Marketing, L.p. gathers it.

    100% of it, on the list since Jun 1, 2020

  • Gas from oil wells

    Targa Midstream Services LLC buys and gathers it.

    Targa Midstream Services LLC buys it: 100% of it, on the list since Jan 1, 2020 · Targa Midstream Services LLC gathers it: 100% of it, on the list since Mar 29, 2013

Companies that used to be listed: Enlink Crude Marketing, LLC (gathers it, until Jun 1, 2020); Targa Midstream Services LLC (buys it, until Jan 1, 2020); Enlink Crude Purchasing LLC (gathers it, until Jan 1, 2020).

SourceRailroad Commission of Texas, Form P-4 file, dated Sep 24, 2026 (source). A listed company is authorised to move or buy the production; the state does not say what it paid.

Who buys my oil and gasIs my oil price fair?

Unit and wells

640 acres on the newest permit

Acres and wells as the operator filed them on its Railroad Commission drilling permits. Your decimal is your net acres over the unit acres, so this is the number to hold your division order against.
Wells on the permits
22 not plugged
Horizontal
0
First completion
Mar 29, 2013
Latest permit
Jan 5, 2015
Wells and acres on the permits for Windham
API numberWell no.Acreson the permit
42-461-331681640
42-461-38501202640

SourceRailroad Commission of Texas, drilling permits and wellbore file, Sep 26, 2026 (source 1, source 2). The acres are what the operator filed; they are not a survey.

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Estimator

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Estimator

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Your decimal interest is the small number on your division order that says what share of the whole lease (8/8ths) is yours. Type it in and we apply it to what the state says WINDHAM sold each month.

For example 0.00097656, or a fraction like 1/1024.

Dollars per barrel. Your statements show the gap your operator uses. Leave 0 to price oil at WTI.

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An estimate, not your check

It ignores gathering and processing fees, taxes, plant products and the price your operator actually gets, so your statement will differ. Use it as a ceiling to compare against. Regional gas prices are often below Henry Hub.

Ledger

36 months, newest first

Compare these numbers with your statements. Your share of a month is the “Oil sold” volume times your decimal. Scroll sideways on a phone.
Monthly production, disposition and prices for WINDHAM
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3Flaredmcf, code 4WTI$ per bblHenry Hub$ per MMBtu
Jul 2026Summit Petroleum2813621,9651,106859$80.46$2.89
Jun 2026Summit Petroleum1861801,633805828$84.81$3.15
May 2026Summit Petroleum2713541,7191,65960$102.13$2.94
Apr 2026Summit Petroleum3523521,7751,7750$100.32$2.77
Mar 2026Summit Petroleum3593622,3871,9060$91.38$3.04
Feb 2026Summit Petroleum3531832,2721,8380$64.51$3.62
Jan 2026Summit Petroleum2811872,1811,7000$60.04$7.72
Dec 2025Summit Petroleum2453622,4321,89655$57.97$4.26
Nov 2025Summit Petroleum2793652,4111,9460$60.06$3.79
Oct 2025Summit Petroleum3151652,5582,0770$60.89$3.19
Sep 2025Summit Petroleum2973382,0542,0540$63.96$2.97
Aug 2025Summit Petroleum2571831,9461,9460$64.86$2.91
Jul 2025Summit Petroleum2773182,0532,0530$68.39$3.20
Jun 2025Summit Petroleum3092591,9701,9700$68.17$3.02
May 2025Summit Petroleum3024662,0442,0440$62.17$3.12
Apr 2025Summit Petroleum2973691,8431,8430$63.54$3.42
Mar 2025Summit Petroleum2781842,1352,1170$68.24$4.12
Feb 2025Summit Petroleum2793581,7151,7040$71.53$4.19
Jan 2025Summit Petroleum2703581,7641,7520$75.74$4.13
Dec 2024Summit Petroleum3521862,0862,0770$70.12$3.01
Nov 2024Summit Petroleum2803692,0222,0100$69.95$2.12
Oct 2024Summit Petroleum3123622,1972,1830$71.99$2.20
Sep 2024Summit Petroleum3751851,9271,9270$70.24$2.28
Aug 2024Summit Petroleum3883492,2742,2740$76.68$1.99
Jul 2024Summit Petroleum2273472,2182,2180$81.80$2.07
Jun 2024Summit Petroleum2891672,3372,3370$79.77$2.54
May 2024Summit Petroleum1773582,2922,2920$80.02$2.12
Apr 2024Summit Petroleum4933392,2782,2690$85.35$1.60
Mar 2024Summit Petroleum3334452,3592,3540$81.28$1.49
Feb 2024Summit Petroleum3833712,2142,2020$77.25$1.72
Jan 2024Summit Petroleum3591732,2512,2410$74.15$3.18
Dec 2023Summit Petroleum1311812,2362,2280$71.90$2.52
Nov 2023Summit Petroleum2793652,0442,0440$77.69$2.71
Oct 2023Summit Petroleum3373572,2002,2000$85.64$2.98
Sep 2023Summit Petroleum3211842,2712,2710$89.43$2.64
Aug 2023Summit Petroleum3403602,3762,3760$81.39$2.58

No report filed More than 3% of gas flared

SourceVolumes: Texas Railroad Commission Production Data Query, reported through Jul 2026. Prices: EIA WTI Cushing spot and Henry Hub spot, monthly, through Aug 2026. “Gas sold” is gas sent to a transmission line (code 2) or a plant (code 3).

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Around this lease

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Everything on this page connects to the operator, field and county records. Start from any of them.

This lease belongs to

OperatorSummit Petroleum LLCFieldSpraberry (Trend Area)CountyUpton County

Summit Petroleum LLC in Upton County

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Spraberry (Trend Area) field

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Leases within 10 km

Found by the location of their wells.

Drilling permits within 10 km

How to read this page

Questions owners ask

What is a decimal interest?

It is your share of the whole lease, written as a decimal. A 1/4 royalty on 5 net acres in a 1,280-acre unit is 1/4 × 5 ÷ 1,280 = 0.00097656. Your division order states yours.

How do I use this page to check a royalty check?

Take the “Oil sold” volume for the month the check covers and multiply it by your decimal. The answer should match the barrels on your statement. If it does not, upload the statement and we will show where the two differ.

Why is the newest month Jul 2026?

The Railroad Commission publishes production two to three months after the fact and revises recent months. We re-pull the latest three months on every update.

Does this page show what my check should be?

No. It shows what the state recorded. Prices, fees and taxes depend on your lease and on what your operator gets for the oil and gas. The estimator gives a ceiling to compare against.

Sources and method

Where these numbers come from

  • Production and disposition by month: Texas Railroad Commission Production Data Query, oil lease 18266, district 7C, reported through Jul 2026.
  • Wells: Texas Railroad Commission Wellbore Query.
  • Prices: U.S. Energy Information Administration, WTI Cushing spot and Henry Hub spot, monthly.
  • Page updated Sep 28, 2026.

We show the state’s numbers as filed. Where the state has no report for a month, we say so instead of guessing.