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Royalty Clerk

Texas oil lease · RRC district 09 · Lease 33605

Producing

KOIN

Koin is an oil lease in Jack County, Texas, operated by Delfin Operating, LLC in the Dimock (Ellenburger) field. The Railroad Commission shows 5,084 bbl of oil in the 12 months through Jun 2026.

Oil lease dossier · 1 well

5,084bbl oil, last 12 months−11% vs prior year
Operator
Delfin Operating, LLC
County
Jack County
Field
Dimock (Ellenburger)
RRC lease
09-33605

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Where it sits

This county

Jack CountyJackWiseClayMontagueYoungArcherJack County
Jack County · RRC district 09Open Jack County →
Gas, last 12 months
4,843 mcf
Oil in Jun 2026
402 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 fell 11% over the last 12 months

4,635 bbl in the 12 months through Jul 2026, against 5,199 bbl in the 12 months before. Jul 2026 was not reported. A red cross marks each one.

  • Oil (bars, left axis)
  • Gas (line, right axis)
  • Last 12 months
Oil output fell 11% over the last 12 monthsMonthly oil production and gas for KOIN, Aug 2023 to Jul 2026. Oil output fell 11% over the last 12 months. 4,635 bbl in the 12 months through Jul 2026, against 5,199 bbl in the 12 months before.Last 12 months: 4,635 bblbbl per monthmcf per month001002002004003006004008005001,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 11% over the last 12 monthsMonthly oil production and gas for KOIN, Aug 2023 to Jul 2026. Oil output fell 11% over the last 12 months. 4,635 bbl in the 12 months through Jul 2026, against 5,199 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001002002004003006004008005001,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 33605, district 09. 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 KOIN 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 KOIN 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 33605, district 09. 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.

Delfin Operating, LLC has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeDelfin Operating, LLC, Jan 2020 to Jun 20262020202120222023202420252026Delfin Operating, LLCJan 2020 to nowthrough Jul 2026
Operators of this lease over timeDelfin Operating, LLC, Jan 2020 to Jun 20262020202120222023202420252026Delfin Operating, LLCJan 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 33605 in district 09. The API number is the state’s ID for a well.
Wells on KOIN
API numberWell no.Status
42-237-404111Active

SourceTexas Railroad Commission Wellbore Query, district 09, lease 33605.

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 KOIN 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 KOIN
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3Flaredmcf, code 4WTI$ per bblHenry Hub$ per MMBtu
Jul 2026No report–––––$80.46$2.89
Jun 2026Delfin Operating,4023884184180$84.81$3.15
May 2026Delfin Operating,4315294274270$102.13$2.94
Apr 2026Delfin Operating,4193734034030$100.32$2.77
Mar 2026Delfin Operating,4253624204200$91.38$3.04
Feb 2026Delfin Operating,4195763663660$64.51$3.62
Jan 2026Delfin Operating,4091953933930$60.04$7.72
Dec 2025Delfin Operating,4373993993990$57.97$4.26
Nov 2025Delfin Operating,4295604044040$60.06$3.79
Oct 2025Delfin Operating,4253744224220$60.89$3.19
Sep 2025Delfin Operating,4307313623620$63.96$2.97
Aug 2025Delfin Operating,4091813893890$64.86$2.91
Jul 2025Delfin Operating,4493594404400$68.39$3.20
Jun 2025Delfin Operating,4565624174170$68.17$3.02
May 2025Delfin Operating,3593644284280$62.17$3.12
Apr 2025Delfin Operating,4373754124120$63.54$3.42
Mar 2025Delfin Operating,4393724264260$68.24$4.12
Feb 2025Delfin Operating,4373623783780$71.53$4.19
Jan 2025Delfin Operating,4283902822820$75.74$4.13
Dec 2024Delfin Operating,4205264574570$70.12$3.01
Nov 2024Delfin Operating,4373784394390$69.95$2.12
Oct 2024Delfin Operating,4293854724720$71.99$2.20
Sep 2024Delfin Operating,4564623793790$70.24$2.28
Aug 2024Delfin Operating,4525394904900$76.68$1.99
Jul 2024Delfin Operating,4533934974970$81.80$2.07
Jun 2024Delfin Operating,4053584754750$79.77$2.54
May 2024Delfin Operating,4015634864860$80.02$2.12
Apr 2024Delfin Operating,3733794734730$85.35$1.60
Mar 2024Delfin Operating,4073644664660$81.28$1.49
Feb 2024Delfin Operating,4303624344340$77.25$1.72
Jan 2024Delfin Operating,4225574504500$74.15$3.18
Dec 2023Delfin Operating,4443724644640$71.90$2.52
Nov 2023Delfin Operating,4235564584580$77.69$2.71
Oct 2023Delfin Operating,4413464884880$85.64$2.98
Sep 2023Delfin Operating,4363275005000$89.43$2.64
Aug 2023Delfin Operating,2735115445440$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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Upload your statements for KOIN. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Delfin Operating, 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

OperatorDelfin Operating, LLCFieldDimock (Ellenburger)CountyJack County

Delfin Operating, LLC in Jack County

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Dimock (Ellenburger) field

All leases in this field →

New drilling permits in Jack 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 Jun 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 33605, district 09, 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.