Skip to content
Royalty Clerk

Texas oil lease · RRC district 02 · Lease 12112

Producing

TMK UNIT

TMK Unit is an oil lease in Karnes County, Texas, operated by Gulftex Energy, LLC in the Sugarkane (Austin Chalk) field. The Railroad Commission shows 50,291 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 3 wells

50,291bbl oil, last 12 months−53% vs prior year
Operator
Gulftex Energy, LLC
County
Karnes County
Field
Sugarkane (Austin Chalk)
RRC lease
02-12112

Own a share of this lease?

Is your check right?

Upload a check stub or a phone photo. We compare every month with the state numbers on this page.

Check my statement

Free. No account needed. Two to four pages.

Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County · RRC district 02Open Karnes County →
Gas, last 12 months
509,466 mcf
Oil in Jul 2026
3,278 bbl
Reporting to the state
since Oct 2020
Wells
3

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 53% over the last 12 months

50,291 bbl in the 12 months through Jul 2026, against 106,899 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Gas (line, right axis)
  • Last 12 months
Oil output fell 53% over the last 12 monthsMonthly oil production and gas for TMK UNIT, Aug 2023 to Jul 2026. Oil output fell 53% over the last 12 months. 50,291 bbl in the 12 months through Jul 2026, against 106,899 bbl in the 12 months before.Last 12 months: 50,291 bblbbl per monthmcf per month0020k25k40k50k60k75k80k100kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 53% over the last 12 monthsMonthly oil production and gas for TMK UNIT, Aug 2023 to Jul 2026. Oil output fell 53% over the last 12 months. 50,291 bbl in the 12 months through Jul 2026, against 106,899 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0020k25k40k50k60k75k80k100kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 12112, district 02. 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.

88% of the gas went to a transmission line in the last 12 months

Flaring peaked at 17.8% of the gas in Apr 2026.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
88% of the gas went to a transmission line in the last 12 monthsShare of TMK UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 88% of the gas went to a transmission line in the last 12 months. Flaring peaked at 17.8% of the gas in Apr 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 17.8%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
88% of the gas went to a transmission line in the last 12 monthsShare of TMK UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 88% of the gas went to a transmission line in the last 12 months. Flaring peaked at 17.8% of the gas in Apr 2026.Share of gas by disposition code0%50%100%Flared 17.8%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, gas disposition by code, lease 12112, district 02. 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 last 12 months, 5.7% of the gas was flared. 21 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.

Gulftex Energy, LLC has reported this lease for the whole period

No change of operator in the months we hold.

Operators of this lease over timeGulftex Energy, LLC, Oct 2020 to Jul 2026202120222023202420252026Gulftex Energy, LLCOct 2020 to nowthrough Jul 2026
Operators of this lease over timeGulftex Energy, LLC, Oct 2020 to Jul 2026202120222023202420252026Gulftex Energy, LLCOct 2020 to nowthrough Jul 2026

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

Wells

3 wells on this lease

Every well the Railroad Commission links to oil lease 12112 in district 02. The API number is the state’s ID for a well.
Wells on TMK UNIT
API numberWell no.Status
42-255-36850102HActive
42-255-37692105HActive
42-255-37693106HActive

SourceTexas Railroad Commission Wellbore Query, district 02, lease 12112.

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

    Phillips 66 Company gathers it.

    100% of it, on the list since Oct 17, 2020

  • Gas from oil wells

    Enterprise Products Operating LLC and Energy Transfer Company buy it; Startex Field Services, LLC gathers it.

    Enterprise Products Operating LLC buys it: 75% of it, on the list since Apr 1, 2022 · Energy Transfer Company buys it: 25% of it, on the list since Apr 1, 2022 · Startex Field Services, LLC gathers it: 100% of it, on the list since Oct 17, 2020

Companies that used to be listed: Enterprise Products Operating LLC (buys it, until Apr 1, 2022).

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

400 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
33 not plugged
Horizontal
3
First completion
Mar 21, 2020
Latest permit
Jan 26, 2023
Wells and acres on the permits for TMK Unit
API numberWell no.Acreson the permit
42-255-37692105H400
42-255-37693106H400
42-255-36850102H400

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 TMK UNIT 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 TMK UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3Flaredmcf, code 4WTI$ per bblHenry Hub$ per MMBtu
Jul 2026Gulftex Energy,3,2783,35738,30835,327136$80.46$2.89
Jun 2026Gulftex Energy,3,2533,17636,17732,2331,268$84.81$3.15
May 2026Gulftex Energy,3,4723,54937,89334,2111,086$102.13$2.94
Apr 2026Gulftex Energy,3,2973,33237,34128,2156,662$100.32$2.77
Mar 2026Gulftex Energy,3,8113,85540,55636,6951,039$91.38$3.04
Feb 2026Gulftex Energy,3,6063,60537,48734,083989$64.51$3.62
Jan 2026Gulftex Energy,4,2634,17254,07146,9723,851$60.04$7.72
Dec 2025Gulftex Energy,4,4724,40745,91938,0424,701$57.97$4.26
Nov 2025Gulftex Energy,4,9274,97646,94042,8691,499$60.06$3.79
Oct 2025Gulftex Energy,5,6655,59947,82740,7814,443$60.89$3.19
Sep 2025Gulftex Energy,4,9444,98241,68836,3952,975$63.96$2.97
Aug 2025Gulftex Energy,5,3035,42645,25942,353339$64.86$2.91
Jul 2025Gulftex Energy,5,6805,58349,69446,636449$68.39$3.20
Jun 2025Gulftex Energy,5,6795,62349,45446,403658$68.17$3.02
May 2025Gulftex Energy,6,5076,58354,70349,6342,775$62.17$3.12
Apr 2025Gulftex Energy,7,2607,25153,79846,4794,776$63.54$3.42
Mar 2025Gulftex Energy,7,5037,53755,91645,2648,010$68.24$4.12
Feb 2025Gulftex Energy,7,6737,69350,60445,9402,604$71.53$4.19
Jan 2025Gulftex Energy,8,8618,86861,11656,0392,324$75.74$4.13
Dec 2024Gulftex Energy,9,8309,74964,66160,6861,148$70.12$3.01
Nov 2024Gulftex Energy,9,9009,98666,93760,5773,728$69.95$2.12
Oct 2024Gulftex Energy,11,76111,77873,55970,174588$71.99$2.20
Sep 2024Gulftex Energy,12,78512,90976,02767,1766,215$70.24$2.28
Aug 2024Gulftex Energy,13,46013,38964,73061,398717$76.68$1.99
Jul 2024Gulftex Energy,14,66314,71166,68663,145882$81.80$2.07
Jun 2024Gulftex Energy,16,20816,17565,42158,9193,973$79.77$2.54
May 2024Gulftex Energy,18,54118,48073,14468,4581,864$80.02$2.12
Apr 2024Gulftex Energy,20,58220,68372,27768,0041,191$85.35$1.60
Mar 2024Gulftex Energy,25,38225,23075,91870,8371,637$81.28$1.49
Feb 2024Gulftex Energy,27,45627,67071,18265,0082,600$77.25$1.72
Jan 2024Gulftex Energy,33,41633,31169,21556,3008,640$74.15$3.18
Dec 2023Gulftex Energy,35,70935,73767,77562,1462,085$71.90$2.52
Nov 2023Gulftex Energy,33,87833,84956,75750,9112,388$77.69$2.71
Oct 2023Gulftex Energy,39,39439,33766,92661,4812,255$85.64$2.98
Sep 2023Gulftex Energy,44,44444,41567,84763,7982,091$89.43$2.64
Aug 2023Gulftex Energy,54,92255,11580,90976,1622,159$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).

Check your statements

Do your checks match this lease?

Upload your statements for TMK UNIT. We compare volumes, prices, deductions and timing with the state record and give you the exact question to ask Gulftex Energy, LLC.

Check my statementTry a sample owner
  • A month that was never paid
  • Your share of the barrels and mcf
  • The price against WTI and Henry Hub
  • Fees taken on gas
  • Late payment interest

Around this lease

Walk the neighborhood

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

This lease belongs to

OperatorGulftex Energy, LLCFieldSugarkane (Austin Chalk)CountyKarnes County

Gulftex Energy, LLC in Karnes County

All Gulftex Energy, LLC leases →

Sugarkane (Austin Chalk) 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 12112, district 02, 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.