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Royalty Clerk

Texas oil lease · RRC district 01 · Lease 21805

Producing

ROPER-STX

Roper-STX is an oil lease in Frio County, Texas, operated by Formentera Operations LLC in the Indio Tanks (Pearsall) field. The Railroad Commission shows 197,583 bbl of oil in the 10 months reported, Oct 2025 through Jul 2026.

Oil lease dossier · 1 well

197,583bbl oil, since Oct 2025
Operator
Formentera Operations LLC
County
Frio County
Field
Indio Tanks (Pearsall)
RRC lease
01-21805

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Where it sits

This county

Frio CountyFrioZavalaAtascosaUvaldeMedinaBexarFrio County
Frio County · RRC district 01Open Frio County →
Gas, since Oct 2025
654,806 mcf
Oil in Jul 2026
11,797 bbl
Reporting to the state
since Oct 2025
Wells
1

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 44% since Oct 2025

Monthly average of 13,517 bbl in the latest 3 months, against 24,244 bbl in the first 3.

  • Oil (bars, left axis)
  • Gas (line, right axis)
Oil output fell 44% since Oct 2025Monthly oil production and gas for ROPER-STX, Oct 2025 to Jul 2026. Oil output fell 44% since Oct 2025. Monthly average of 13,517 bbl in the latest 3 months, against 24,244 bbl in the first 3.bbl per monthmcf per month0010k25k20k50k30k75k40k100kOct 25Jan 26AprJul
Oil output fell 44% since Oct 2025Monthly oil production and gas for ROPER-STX, Oct 2025 to Jul 2026. Oil output fell 44% since Oct 2025. Monthly average of 13,517 bbl in the latest 3 months, against 24,244 bbl in the first 3.bbl per monthmcf per month0010k25k20k50k30k75k40k100kJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 21805, district 01. 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.

93% of the gas went to a transmission line in the 10 months reported

Flaring peaked at 36.2% of the gas in Jun 2026.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
93% of the gas went to a transmission line in the 10 months reportedShare of ROPER-STX gas by disposition code each month, Oct 2025 to Jul 2026. 93% of the gas went to a transmission line in the 10 months reported. Flaring peaked at 36.2% of the gas in Jun 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 36.2%Oct 25Jan 26AprJul
93% of the gas went to a transmission line in the 10 months reportedShare of ROPER-STX gas by disposition code each month, Oct 2025 to Jul 2026. 93% of the gas went to a transmission line in the 10 months reported. Flaring peaked at 36.2% of the gas in Jun 2026.Share of gas by disposition code0%50%100%Flared 36.2%Jan 26Jul

SourceTexas Railroad Commission Production Data Query, gas disposition by code, lease 21805, district 01. Reported through Jul 2026.

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 10 months reported, 7.0% of the gas was flared. 9 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.

Formentera Operations LLC has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeFormentera Operations LLC, Oct 2025 to Jul 20262026Formentera Operations LLCOct 2025 to nowthrough Jul 2026
Operators of this lease over timeFormentera Operations LLC, Oct 2025 to Jul 20262026Formentera Operations LLCOct 2025 to nowthrough Jul 2026

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

Wells

1 well on this lease

Every well the Railroad Commission links to oil lease 21805 in district 01. The API number is the state’s ID for a well.
Wells on ROPER-STX
API numberWell no.Status
42-163-34365N731HShut-in

SourceTexas Railroad Commission Wellbore Query, district 01, lease 21805.

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

    Medallion Operating Company, LLC gathers it.

    100% of it, on the list since Jul 1, 2026

  • 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 Sep 4, 2025 · Targa Midstream Services LLC gathers it: 100% of it, on the list since Sep 4, 2025

Companies that used to be listed: Transoil Marketing, LLC (gathers it, until Jul 1, 2026).

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

736 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
11 not plugged
Horizontal
1
First completion
Sep 4, 2025
Latest permit
Mar 17, 2025
Wells and acres on the permits for Roper-STX
API numberWell no.Acreson the permit
42-163-34365N731H736

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.

Check my decimal against the unit

Estimator

Estimate your royalty for this lease

A rough check before you look at a statement: the state volumes times your decimal, priced at WTI and Henry Hub.

Estimator

What could your check be?

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 ROPER-STX 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.

Your estimate appears here

Enter your decimal to see an estimated royalty for each of the last 10 months this lease reported. Nothing you type leaves your browser.

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

10 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 ROPER-STX
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3Flaredmcf, code 4WTI$ per bblHenry Hub$ per MMBtu
Jul 2026Formentera Operations11,79711,78045,60242,7272,430$80.46$2.89
Jun 2026Formentera Operations13,03412,86748,58030,78117,591$84.81$3.15
May 2026Formentera Operations15,72115,29462,03159,1112,692$102.13$2.94
Apr 2026Formentera Operations15,02715,68458,21154,8893,061$100.32$2.77
Mar 2026Formentera Operations19,88020,29472,36369,6702,426$91.38$3.04
Feb 2026Formentera Operations20,34019,59270,22067,4482,519$64.51$3.62
Jan 2026Formentera Operations29,05229,78695,61592,6002,739$60.04$7.72
Dec 2025Formentera Operations23,06822,44375,85772,9852,651$57.97$4.26
Nov 2025Formentera Operations28,40828,63279,30775,7813,306$60.06$3.79
Oct 2025Formentera Operations21,25620,60047,02040,4346,446$60.89$3.19

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).

Check your statements

Do your checks match this lease?

Upload your statements for ROPER-STX. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Formentera Operations LLC.

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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

OperatorFormentera Operations LLCFieldIndio Tanks (Pearsall)CountyFrio County

Formentera Operations LLC in Frio County

All Formentera Operations LLC leases →

Indio Tanks (Pearsall) field

All leases in this field →

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 21805, district 01, 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.

FAQ

Questions about ROPER-STX

Who operates the ROPER-STX lease?

The Railroad Commission lists Formentera Operations LLC (operator number 276959) as the operator of this lease in Frio County, Texas. The operator history on this page shows earlier operators and when the record changed.

How much has the ROPER-STX lease produced?

The lease reported 197,583 bbl of oil and 654,806 mcf of gas in the last 12 months through Jul 2026. Monthly figures for 10 months are in the ledger on this page, taken from the Railroad Commission's production data.

Does this page show who owns the royalty?

No. Railroad Commission records show who operates a lease and what it reported, not who owns the minerals or receives royalty. Your division order and royalty stub name the lease and your decimal interest.

How do I check my royalty stub against this lease?

Multiply the lease's volume for a month by your decimal interest and compare it with the barrels and mcf on your stub for the same month. The two are seldom identical, since sales and reporting months can differ, but a large gap is worth a question to the operator.

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