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Royalty Clerk

Texas oil lease · RRC district 7C · Lease 15166

Producing

MANN 20

Mann 20 is an oil lease in Pecos County, Texas, operated by Darkens Oil & Gas Inc. in the Tippett (Clear Fork Lo.) field. The Railroad Commission shows 137 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 1 well

137bbl oil, last 12 months+5% vs prior year
Operator
Darkens Oil & Gas Inc.
County
Pecos County
Field
Tippett (Clear Fork Lo.)
RRC lease
7C-15166

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Where it sits

This county

Pecos CountyPecosUptonCranePecos County
Pecos County · RRC district 7COpen Pecos County →
Gas, last 12 months
12 mcf
Oil in Jul 2026
10 bbl
Reporting to the state
since Jan 2020
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 rose 5% over the last 12 months

137 bbl in the 12 months through Jul 2026, against 131 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Gas (line, right axis)
  • Last 12 months
Oil output rose 5% over the last 12 monthsMonthly oil production and gas for MANN 20, Aug 2023 to Jul 2026. Oil output rose 5% over the last 12 months. 137 bbl in the 12 months through Jul 2026, against 131 bbl in the 12 months before.Last 12 months: 137 bblbbl per monthmcf per month005100102001530020400Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 5% over the last 12 monthsMonthly oil production and gas for MANN 20, Aug 2023 to Jul 2026. Oil output rose 5% over the last 12 months. 137 bbl in the 12 months through Jul 2026, against 131 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005100102001530020400Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 15166, 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.

All of the gas went to a transmission line in the last 12 months

Each bar is one month. Colors are the disposition codes the operator reported.

All of the gas went to a transmission line in the last 12 monthsShare of MANN 20 gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a transmission line in the last 12 months. Share of the lease’s gas by disposition code, per month0%50%100%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
All of the gas went to a transmission line in the last 12 monthsShare of MANN 20 gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a transmission line in the last 12 months. Share of gas by disposition code0%50%100%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, gas disposition by code, lease 15166, district 7C. Reported through Jul 2026.

Transmission line (2)

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

None of the gas was flared in the last 12 months.

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.

Darkens Oil & Gas Inc. has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeDarkens Oil & Gas Inc., Jan 2020 to Jul 20262020202120222023202420252026Darkens Oil & Gas Inc.Jan 2020 to nowthrough Jul 2026
Operators of this lease over timeDarkens Oil & Gas Inc., Jan 2020 to Jul 20262020202120222023202420252026Darkens Oil & Gas Inc.Jan 2020 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 15166 in district 7C. The API number is the state’s ID for a well.
Wells on MANN 20
API numberWell no.Status
42-371-305141Active

SourceTexas Railroad Commission Wellbore Query, district 7C, lease 15166.

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

    Oasis Transp & Marketing Corp. gathers it.

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

Companies that used to be listed: Energy Transfer Company (gathers it, until Jan 1, 2026); Energy Transfer Company (buys it, until Jan 1, 2026); Hollyfrontier Ref & Mktg LLC (gathers it, until Jan 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

160 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
0
First completion
Jul 18, 2001
Latest permit
Nov 22, 2000
Wells and acres on the permits for Mann 20
API numberWell no.Acreson the permit
42-371-305141160

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 MANN 20 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. 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 MANN 20
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3Flaredmcf, code 4WTI$ per bblHenry Hub$ per MMBtu
Jul 2026Darkens Oil100000$80.46$2.89
Jun 2026Darkens Oil100000$84.81$3.15
May 2026Darkens Oil100000$102.13$2.94
Apr 2026Darkens Oil12167000$100.32$2.77
Mar 2026Darkens Oil100000$91.38$3.04
Feb 2026Darkens Oil100000$64.51$3.62
Jan 2026Darkens Oil100000$60.04$7.72
Dec 2025Darkens Oil100000$57.97$4.26
Nov 2025Darkens Oil150000$60.06$3.79
Oct 2025Darkens Oil150000$60.89$3.19
Sep 2025Darkens Oil100000$63.96$2.97
Aug 2025Darkens Oil15012120$64.86$2.91
Jul 2025Darkens Oil1002852850$68.39$3.20
Jun 2025Darkens Oil1002582580$68.17$3.02
May 2025Darkens Oil1002712710$62.17$3.12
Apr 2025Darkens Oil1002802800$63.54$3.42
Mar 2025Darkens Oil1002922920$68.24$4.12
Feb 2025Darkens Oil1002482480$71.53$4.19
Jan 2025Darkens Oil11095950$75.74$4.13
Dec 2024Darkens Oil101612132130$70.12$3.01
Nov 2024Darkens Oil1002872870$69.95$2.12
Oct 2024Darkens Oil10063630$71.99$2.20
Sep 2024Darkens Oil10038380$70.24$2.28
Aug 2024Darkens Oil200000$76.68$1.99
Jul 2024Darkens Oil1002842840$81.80$2.07
Jun 2024Darkens Oil1002132130$79.77$2.54
May 2024Darkens Oil1001081080$80.02$2.12
Apr 2024Darkens Oil1002752750$85.35$1.60
Mar 2024Darkens Oil1002922920$81.28$1.49
Feb 2024Darkens Oil1002752750$77.25$1.72
Jan 2024Darkens Oil1003053050$74.15$3.18
Dec 2023Darkens Oil1002832830$71.90$2.52
Nov 2023Darkens Oil1002452450$77.69$2.71
Oct 2023Darkens Oil1002912910$85.64$2.98
Sep 2023Darkens Oil101702822820$89.43$2.64
Aug 2023Darkens Oil503003000$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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This lease belongs to

OperatorDarkens Oil & Gas Inc.FieldTippett (Clear Fork Lo.)CountyPecos County

Darkens Oil & Gas Inc. in Pecos County

All Darkens Oil & Gas Inc. leases →

Tippett (Clear Fork Lo.) field

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Leases within 10 km

Found by the location of their wells.

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 15166, 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.