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Royalty Clerk

Texas oil lease · RRC district 08 · Lease 24399

Producing

CHALKLEY

Chalkley is an oil lease in Pecos County, Texas, operated by Olsen Energy Inc. in the Lehn-Apco, South (Ellen) field. The Railroad Commission shows 3,138 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 4 wells

3,138bbl oil, last 12 months−14% vs prior year
Operator
Olsen Energy Inc.
County
Pecos County
Field
Lehn-Apco, South (Ellen)
RRC lease
08-24399

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Where it sits

This county

Pecos CountyPecosUptonCranePecos County
Pecos County · RRC district 08Open Pecos County →
Oil in Jul 2026
444 bbl
Reporting to the state
since Jan 2020
Wells
4
Data through
Jul 2026

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 14% over the last 12 months

3,138 bbl in the 12 months through Jul 2026, against 3,628 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Last 12 months
Oil output fell 14% over the last 12 monthsMonthly oil production for CHALKLEY, Aug 2023 to Jul 2026. Oil output fell 14% over the last 12 months. 3,138 bbl in the 12 months through Jul 2026, against 3,628 bbl in the 12 months before.Last 12 months: 3,138 bblbbl per month0100200300400500Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 14% over the last 12 monthsMonthly oil production for CHALKLEY, Aug 2023 to Jul 2026. Oil output fell 14% over the last 12 months. 3,138 bbl in the 12 months through Jul 2026, against 3,628 bbl in the 12 months before.Last 12 monthsbbl per month0100200300400500Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 24399, district 08. 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.

No gas disposition reported for this lease

The operator has not reported where the gas went in the months we hold.

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.

Olsen Energy Inc. has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeOlsen Energy Inc., Jan 2020 to Jul 20262020202120222023202420252026Olsen Energy Inc.Jan 2020 to nowthrough Jul 2026
Operators of this lease over timeOlsen Energy Inc., Jan 2020 to Jul 20262020202120222023202420252026Olsen Energy Inc.Jan 2020 to nowthrough Jul 2026

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

Wells

4 wells on this lease

Every well the Railroad Commission links to oil lease 24399 in district 08. The API number is the state’s ID for a well.
Wells on CHALKLEY
API numberWell no.Status
42-371-318051Active
42-371-323312Shut-in
42-371-323933AActive
42-371-324534Active

SourceTexas Railroad Commission Wellbore Query, district 08, lease 24399.

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

    Shell Trading (Us) Company gathers it.

    100% of it, on the list since Dec 1, 2025

  • Gas from oil wells

    Energy Transfer Marketing & Term buys it; Energy Transfer Company gathers it.

    Energy Transfer Marketing & Term buys it: 100% of it, on the list since Dec 1, 2025 · Energy Transfer Company gathers it: 100% of it, on the list since Feb 1, 2016

Companies that used to be listed: Energy Transfer Company (buys it, until Dec 1, 2025); Hollyfrontier Ref & Mktg LLC (gathers it, until Dec 1, 2025).

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

360 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
55 not plugged
Horizontal
0
First completion
Jan 25, 1977
Latest permit
Dec 30, 2016
Wells and acres on the permits for Chalkley
API numberWell no.Acreson the permit
42-371-323933360
42-371-323933A360
42-371-324534360
42-371-318051360
42-371-323312360

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 CHALKLEY 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 12 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.

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 CHALKLEY
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026Olsen Energy444462$80.46$2.89
Jun 2026Olsen Energy225229$84.81$3.15
May 2026Olsen Energy196226$102.13$2.94
Apr 2026Olsen Energy214114$100.32$2.77
Mar 2026Olsen Energy286339$91.38$3.04
Feb 2026Olsen Energy237229$64.51$3.62
Jan 2026Olsen Energy218230$60.04$7.72
Dec 2025Olsen Energy278229$57.97$4.26
Nov 2025Olsen Energy248370$60.06$3.79
Oct 2025Olsen Energy274127$60.89$3.19
Sep 2025Olsen Energy299336$63.96$2.97
Aug 2025Olsen Energy219238$64.86$2.91
Jul 2025Olsen Energy230238$68.39$3.20
Jun 2025Olsen Energy294224$68.17$3.02
May 2025Olsen Energy297345$62.17$3.12
Apr 2025Olsen Energy177218$63.54$3.42
Mar 2025Olsen Energy344350$68.24$4.12
Feb 2025Olsen Energy241228$71.53$4.19
Jan 2025Olsen Energy192232$75.74$4.13
Dec 2024Olsen Energy363347$70.12$3.01
Nov 2024Olsen Energy331335$69.95$2.12
Oct 2024Olsen Energy361333$71.99$2.20
Sep 2024Olsen Energy366368$70.24$2.28
Aug 2024Olsen Energy432451$76.68$1.99
Jul 2024Olsen Energy405323$81.80$2.07
Jun 2024Olsen Energy252328$79.77$2.54
May 2024Olsen Energy317211$80.02$2.12
Apr 2024Olsen Energy260246$85.35$1.60
Mar 2024Olsen Energy331495$81.28$1.49
Feb 2024Olsen Energy296227$77.25$1.72
Jan 2024Olsen Energy270233$74.15$3.18
Dec 2023Olsen Energy286328$71.90$2.52
Nov 2023Olsen Energy371338$77.69$2.71
Oct 2023Olsen Energy331369$85.64$2.98
Sep 2023Olsen Energy497583$89.43$2.64
Aug 2023Olsen Energy242118$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

OperatorOlsen Energy Inc.FieldLehn-Apco, South (Ellen)CountyPecos County

Olsen Energy Inc. in Pecos County

All Olsen Energy Inc. leases →

Lehn-Apco, South (Ellen) field

All leases in this field →

Leases within 10 km

Found by the location of their wells.

  • CHALKLEY "B"

    2,051 bbl last 12 months · 0.3 km away

  • CHALKLEY "A"

    0 mcf last 12 months · 0.5 km away

  • TAFT

    561 mcf last 12 months · 0.8 km away

  • TAFT

    0 mcf last 12 months · 0.8 km away

  • MERCHANT STATE

    1,939 bbl last 12 months · 0.8 km away

New drilling permits in Pecos County

We do not have coordinates for this lease, so these are the newest permits in its county.

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 24399, district 08, 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.