Mustang Is-Sb County leases reported 2.3K barrels of oil and 42.1K MCF of gas to the Texas Railroad Commission in the 12 months to Jul 2026, ranking #205 of 219 producing Texas counties by oil-equivalent volume.
2.3KBBL oil, last 12 months▼ 90% vs prior 12
42.1KMCF gas, last 12 months▼ 89% vs prior 12
0new permits, Oct 1–Oct 14
15+top leases listed below
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Mustang Is-Sb County highlighted; dots are its new permits with coordinates.
Mustang Is-Sb County oil + condensate (BBL per month, last 36 months)
Mustang Is-Sb County gas (MCF per month, last 36 months)
Jun 2026 and Jul 2026 are provisional (lighter bars) and usually rise as late reports arrive.
Mustang Is-Sb County production in brief
Mustang Is-Sb County produced 2,336 barrels of oil and condensate and 42,129 MCF of gas in the 12 months from Aug 2025 to Jul 2026, about 0.0% of Texas oil and 0.0% of Texas gas on our county figures. Compared with the previous 12 months, oil was down 90% and gas was down 89%. The highest oil month in the last three years was Jan 2024 at 2,357 barrels. The largest operators by oil-equivalent volume were WHITE MARLIN OPERATING CO, LLC, TR OFFSHORE, LLC and CHAPARRAL ENERGY, L.L.C.. The top lease by oil was STATE TRACT 898-S, operated by WHITE MARLIN OPERATING CO, LLC, with 1,453 barrels. RRC issued no new drilling permits in Mustang Is-Sb County between October 1 and Oct 14, 2026.
Top leases, last 12 months
Lease
Operator
Field
Oil (BBL)
Gas (MCF)
STATE TRACT 898-S
WHITE MARLIN OPERATING CO, LLC
MU BLOCK 898 (6000 STRINGER)
1,453
30,667
STATE TRACT 904 GAS UNIT
TR OFFSHORE, LLC
G.O.M. ST-904 (FRIO 1-A)
409
8,288
STATE TRACT 904 GAS UNIT
TR OFFSHORE, LLC
G.O.M. ST 904 (MT2 FB-B)
172
157
STATE TRACT 904 GAS UNIT
TR OFFSHORE, LLC
G.O.M. ST 904 (13,500 SAND)
147
1,417
STATE TRACT 904 GAS UNIT
TR OFFSHORE, LLC
G.O.M. ST 904 (12500 SD)
93
811
STATE TRACT 904 GAS UNIT
TR OFFSHORE, LLC
G.O.M. ST-904 (9370)
32
297
STATE TRACT 904 GAS UNIT
TR OFFSHORE, LLC
G.O.M. ST-904 (12950 SD)
30
492
TEXAS STATE LEASE 41338
WHITE MARLIN OPERATING CO, LLC
MSTG ISL BLK889(MARG TEXUP11000)
0
0
SOUTH SPRINT STATE GAS UNIT # 2
MODENA OPERATING LLC
SPRINT, S. (FRIO A)
0
0
SOUTH SPRINT STATE GAS UNIT #3
MODENA OPERATING LLC
SPRINT, S. (FRIO A)
0
0
TEXAS STATE LSE #41338
WHITE MARLIN OPERATING CO, LLC
MSTG.ISL. BLK 889(MARG FRIO UP.)
0
0
STATE TRACT "901-S"
CHAPARRAL ENERGY, L.L.C.
BLOCK 901 (7800)
0
0
S. T. 773-L SW/4
TR OFFSHORE, LLC
G.O.M. ST-904 (FRIO TOP)
0
0
S/L 41338
WHITE MARLIN OPERATING CO, LLC
MSTG. ISL. BLK 889 (FRIO 12400)
0
0
S/L 41338
WHITE MARLIN OPERATING CO, LLC
MSTG. ISL. BLK 883-S (11700)
0
0
Top operators, last 12 months
Operator
Leases
Oil (BBL)
Gas (MCF)
WHITE MARLIN OPERATING CO, LLC
10
1,453
30,667
TR OFFSHORE, LLC
13
883
11,462
CHAPARRAL ENERGY, L.L.C.
1
0
0
MODENA OPERATING LLC
2
0
0
New drilling permits this month
No new permits in this county in the current RRC daily file.
Monthly figures
Month
Oil (BBL)
Gas (MCF)
Leases reporting
Jul 2026 (provisional)
0
0
26
Jun 2026 (provisional)
0
0
26
May 2026
0
0
26
Apr 2026
0
0
26
Mar 2026
0
0
26
Feb 2026
0
0
26
Jan 2026
0
0
26
Dec 2025
182
1,418
26
Nov 2025
167
1,677
26
Oct 2025
166
2,644
26
Sep 2025
322
6,072
26
Aug 2025
1,499
30,318
26
Questions about Mustang Is-Sb County minerals
How do I look up my lease in Mustang Is-Sb County?
Find the RRC lease number on your check stub, then search it on our lease search or in the RRC Production Data Query using district and lease number. Without a number, open the RRC GIS viewer, go to Mustang Is-Sb County and click the well. Step by step: how to look up your lease on RRC.
Who are the top operators in Mustang Is-Sb County?
By oil-equivalent volume over the 12 months to Jul 2026: WHITE MARLIN OPERATING CO, LLC (1,453 BBL oil, 30,667 MCF gas), TR OFFSHORE, LLC (883 BBL oil, 11,462 MCF gas) and CHAPARRAL ENERGY, L.L.C. (0 BBL oil, 0 MCF gas). The full list is in the table above.
How are royalties calculated on Mustang Is-Sb County production?
A gross royalty is roughly (oil volume × oil price + gas volume × gas price) × your decimal interest. Your decimal is on your check stub or division order. County production in May 2026 was 0 BBL of oil; try your own lease in the royalty estimator. Severance tax and any deductions your lease allows reduce the check.
How do I sell mineral rights in Mustang Is-Sb County?
Start with the production history of your lease on its page here, then compare several offers on the same basis (price per net mineral acre or a multiple of monthly royalty). Recent permits in the county (0 so far this month) can matter to buyers. See how to sell mineral rights. We are not a buyer or broker.
Source: Texas Railroad Commission (data sets, Production Data Query). Data date: RRC Production Data Query dump, extract dated Sep 18, 2026; production through Jul 2026. Jun 2026 and Jul 2026 are provisional: operators file late and amend, so these months usually rise in later releases. Oil = crude oil + condensate (BBL); gas = gas-well gas + casinghead gas (MCF), as reported to RRC. RRC notes county-level figures are allocated estimates based on allowables and potentials. Methodology.