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COUNTIES · TEXAS GULF COAST · DISTRICT 03 · CODE 245

Jefferson County, Texas

The RRC's county figures put Jefferson County at 319,353 bbl of oil and 1,541,976 Mcf of gas in the twelve months through August 2026; oil is down 4% on the twelve months before.

97 leases under 28 operators had production in those months.

4 drilling permits were issued in Jefferson County in the past 90 days, 6 in the 90 days before.

Exxonmobil Low C Sol on Stor LLC leads with 11 permits in the past 12 months, one of 8 operators active in the county.

4 operators filed a first Jefferson County permit in the past year.

Median permitted depth over the past year is 7,753 ft (prior year: 8,000 ft); 0% of the past year's permits are horizontal.

The county has 83 active disposal and injection permits of 313 on file, with 55.7M barrels injected in the 12 months reported through September 2025.

2,674 drilling permits have been issued in Jefferson County since 1977.

2,674 permits on file since 1977 · last issued Oct 22, 2026

Email me new permits

Also: every Jefferson County well in the statewide list, searchable → · a year of permits on the map →

311
active wells · 3,360 on file
28
producing operators, 12 months
97
producing leases, 12 months
319,353
bbl oil, 12 months through Aug 2026 · −4%
1.5M
Mcf gas, same 12 months · +7%

RRC COUNTY FIGURES · NO. 114 IN OIL AND NO. 134 IN GAS OF 219 PRODUCING TEXAS COUNTIES

Jefferson County oil and gas production

RRC COUNTY FIGURES · THROUGH AUG 2026

Texas operators report production by lease, and the Railroad Commission totals it by county. Where a lease lies in more than one county, the split between them is the RRC's. Oil includes condensate; gas includes casinghead gas.

12 months through Aug 2026 319,353 · prior 12 332,453(-4%)

050K100K150K2017201820192020202120222023202420252026

Latest months

MonthOilGas
Aug 202633,408 bbl233,329 Mcf
Jul 202625,486 bbl125,672 Mcf
Jun 202624,791 bbl124,506 Mcf
May 202625,828 bbl126,301 Mcf
Apr 202627,868 bbl128,313 Mcf
Mar 202629,628 bbl139,036 Mcf
Feb 202625,811 bbl125,080 Mcf
Jan 202626,808 bbl117,144 Mcf
Dec 202523,195 bbl97,043 Mcf
Nov 202523,826 bbl93,081 Mcf
Oct 202526,976 bbl118,404 Mcf
Sep 202525,728 bbl114,067 Mcf

Operators by production

12 MONTHS THROUGH AUG 2026

  1. Ballard Exploration Company,inc.6 leases

    68.1K bbl · 693K Mcf

  2. Hilcorp Energy Company17 leases

    82K bbl · 586K Mcf

  3. White Marlin Operating Co, LLC5 leases

    20.2K bbl · 94.9K Mcf

  4. Olipdp II, LLC2 leases

    24K bbl · 11.3K Mcf

  5. Rheaco Oil Company, Ltd.3 leases

    22.3K bbl · 0 Mcf

  6. Milestone Operating, Inc.15 leases

    13.3K bbl · 37.5K Mcf

  7. Gepard Energy Inc2 leases

    16.5K bbl · 5.66K Mcf

  8. Kingwood Exploration LLC8 leases

    14.1K bbl · 0 Mcf

28 operators had production here in the twelve months. Each month is credited to the operator that reported it; ranked by barrels of oil equivalent, 6 Mcf to the barrel.

Every operator in Jefferson County →

Largest leases

97 LEASES WITH PRODUCTION · 12 MONTHS THROUGH AUG 2026

LeaseOperatorFieldOil, 12 moGas, 12 mo
McFaddinGas 257094Ballard Exploration Company,inc.Taylor Bayou, S. (Hackberry 1)24,915 bbl242,883 Mcf
State Tract 29Gas 269162Ballard Exploration Company,inc.Pleasure Island (Hackberry 2)22,402 bbl238,462 Mcf
Sun FeeGas 203126Hilcorp Energy CompanyNome N.E. (12800)11,390 bbl217,660 Mcf
Keeland Gas UnitGas 280482Hilcorp Energy CompanyClaude Watts (Yegua 12600)26,658 bbl116,162 Mcf
Deep SkyGas 300892Ballard Exploration Company,inc.China (Yegua Cons.)11,333 bbl127,671 Mcf
Sun-Harder AGas 242413Hilcorp Energy CompanyRebel (Yegua)6,364 bbl149,061 Mcf
Thomas, E., Mrs. et AlOil 10454Hilcorp Energy CompanyFannett18,448 bbl19,180 Mcf
Sabco FoltsOil 25866White Marlin Operating Co, LLCLa Belle (8600)12,282 bbl55,887 Mcf
Turner-BoganGas 233770Ballard Exploration Company,inc.Constitution, South (Yegua)6,389 bbl66,908 Mcf
Gladys CityOil 3963Rheaco Oil Company, Ltd.Spindletop16,362 bbl0 Mcf
Sonny VOil 26652Olipdp II, LLCPort Acres (Marg-Frio Cons.)15,656 bbl4,098 Mcf
McFaddin TrustOil 702Gepard Energy IncClam Lake11,926 bbl4,067 Mcf
Fitzhugh-BurrellOil 28088Fort Apache Energy, Inc.Fannett8,164 bbl25,536 Mcf
Walter Co.Gas 260140Hilcorp Energy CompanyConstitution (Westbury)4,686 bbl35,086 Mcf
MMKOil 26396Olipdp II, LLCPort Acres (Marg-Frio Cons.)8,391 bbl7,157 Mcf

Ranked by barrels of oil equivalent, 6 Mcf to the barrel. A lease in two counties is listed with its share in this one.

Every lease in Jefferson County →

Wells by status

3,360 WELLBORES ON FILE

  1. Plugged

    1,800

  2. Not on schedule

    968

  3. Producing

    204

  4. Shut In

    145

  5. Temp Abandoned

    87

  6. Injection

    56

  7. Lpg Storage

    31

  8. Spudded

    24

From the RRC wellbore file and the permit record. Other sites count the RRC's map locations, which include dry holes and locations this file does not hold, so their totals differ.

Wells spudded, by year

HorizontalVertical and directional

02040602002200420062008201020122014201620182020202220242026

Drilling permits

Window30 days90 days180 days365 days
4
permits issued, 90d
-33%
vs prior 90d (6)
1
operators filing
0%
horizontal
458
avg permitted depth, ft

WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 12, 2026 · WHY ISSUE AND SEEN DATES DIFFER

Permits issued by month

LAST 120 MONTHS · BY ISSUE DATE

Last 12 months 24 · prior 12 11(+118%)

0510152017201820192020202120222023202420252026

Operators by permits, last 12 months

By permits issued. Wells are the operator’s current inventory here from the RRC wellbore file.

OperatorPermitsWells
Exxonmobil Low C Sol on Stor LLC115
Kinder Morgan Texas Pipeline LLC40
Golden Triangle Storage, LLC311
Kingwood Exploration LLC2175
Rheaco Oil Company, Ltd.2175
Gepard Energy Inc183
Magnetar Operating LLC10
Rusk Energy Operating LLC10

Full operator directory: 450 operators have filed a permit here since 1977 →

New entrants, last 12 months

Operators whose first permit in Jefferson County came in the last year. 4 in total.

Permit types, 90d

TypeWindowPriorAll time
Drill431,716
Recompletion03784

What the types mean →

Formations in completed wells

RRC WELLBORE FILE · ≥10 WELLS

Tops reported on completion filings for wells in Jefferson County. A well counts for every formation it reports, so this reads as the county's stratigraphic column. About tops →

In Jefferson County the Miocene (undifferentiated) is reported in 260 wells, median top 3,347 ft, highlighted below. Back to the formation →

FormationWellsPermitted last 3 yrsMedian top, ftP10–P90
Frio30587,5385,665–9,272
Miocene (undifferentiated)260103,347796–7,482
Yegua77011,80010,240–13,036
Vicksburg7008,2927,673–8,958
Caprock6621,068312–1,592
Anahuac6415,6945,322–7,640
Jackson2809,6058,268–10,496

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Disposal and injection

83
active UIC permits of 313
1.2M
permitted bbl/day, active
55.7M
bbl injected, last 12 reported months
Sep 2025
reported through

Every active well, operator, and daily reporter in Jefferson County →

Permitted volume is a ceiling, not throughput. How to read it →

USGS catalog, Texas

Seismicity, last 2 years

0
M2+ events in the area
—
largest

Monthly counts, magnitudes, and every recent event in the area →

Events are not tagged with a county; this counts M2+ events inside the bounding box of the county’s located permits, padded 0.1°. About TexNet →

Latest permits

NEWEST FIRST BY ISSUE DATE

PermitSeenIssuedOperatorLease / wellDepthAPI
918943Oct 24, 2026Oct 22, 2026Kinder Morgan Texas Pipeline LLCTip-219 #145024532943
918942Oct 24, 2026Oct 22, 2026Kinder Morgan Texas Pipeline LLCTip-206 #148024532942
918944Oct 24, 2026Oct 22, 2026Kinder Morgan Texas Pipeline LLCKmlp-03 #145024532944
918939Oct 16, 2026Oct 14, 2026Kinder Morgan Texas Pipeline LLCTip-202 #145024532941
917179Jul 29, 2026Jul 29, 2026Gepard Energy IncMcFaddin Trust #91ST6,50024531934
917427Jul 27, 2026Jul 27, 2026Golden Triangle Storage, LLCGolden Triangle Storage #118,50024532940
917282Jul 20, 2026Jul 20, 2026Kingwood Exploration LLCMcFaddin Ranch #15ST7,77324532841
917269Jul 20, 2026Jul 20, 2026Kingwood Exploration LLCMcFaddin Ranch #13ST7,73524532060
916905Jul 7, 2026Jul 7, 2026Golden Triangle Storage, LLCGolden Triangle Storage #108,50024532939
916286AmendmentSep 10, 2026Jun 10, 2026Exxonmobil Low C Sol on Stor LLCSunflower 2 Azm #24,00024532938

All Jefferson County permits →

Questions about Jefferson County

How many drilling permits were issued in Jefferson County in the last 12 months?

25 permits were issued in Jefferson County in the last 12 months, up 127% from 11 in the 12 months before. 0% were for horizontal wells. The most recent was issued Oct 22, 2026. 2,674 are on file since 1977.

Every Jefferson County permit →

Who is the most active operator in Jefferson County?

By drilling permits filed in the last 12 months, Exxonmobil Low C Sol on Stor LLC is the most active operator in Jefferson County, with 11 of 25, followed by Kinder Morgan Texas Pipeline LLC (4) and Golden Triangle Storage, LLC (3). 1 operator filed permits here in the last 90 days.

Operators in Jefferson County →

How many oil and gas wells are in Jefferson County?

3,360 wells are on file in Jefferson County, including 311 active, 1,800 plugged, and 18 permitted and not yet drilled. 5 are horizontal. The active wells are under 41 operators.

Every well in Jefferson County →

How much oil and gas does Jefferson County produce?

The Railroad Commission's county figures show 319,353 barrels of oil and 1.5 million Mcf of gas in Jefferson County in the 12 months through August 2026, from 97 leases under 28 operators. Texas operators report production by lease; where a lease lies in more than one county, the split between them is the RRC's.

Production by month in Jefferson County →

Who are the largest producers in Jefferson County?

By oil and gas produced in Jefferson County in the 12 months through August 2026, the largest operator is Ballard Exploration Company,inc., with 68,110 barrels of oil and 693,245 Mcf of gas from 6 leases, followed by Hilcorp Energy Company and White Marlin Operating Co, LLC. 28 operators had production here in those months.

Operators in Jefferson County →

How much water is injected in Jefferson County?

55.7 million barrels of water were injected in Jefferson County in the 12 months through September 2025, reported on form H-10. 83 of the county's 313 disposal and injection permits are active.

Disposal and injection in Jefferson County →

What formations are drilled in Jefferson County?

Completion filings for wells in Jefferson County report tops for 7 formations in at least ten wells each. The most reported are the Frio (305 wells, median top 7,538 ft), the Miocene (undifferentiated) (260 wells, median top 3,347 ft), and the Yegua (77 wells, median top 11,800 ft).

Formations in Jefferson County →

What basin is Jefferson County in?

Petrora lists Jefferson County in the Texas Gulf Coast. It is in the Railroad Commission's District 03.

The Texas Gulf Coast →

Have there been earthquakes in Jefferson County?

No earthquakes of magnitude 2 or more were located in the area of Jefferson County's permitted wells in the last 2 years.

Earthquakes in Jefferson County →

About this data

Oil and gas are the Railroad Commission's county figures from its Production Data Query, through Aug 2026: Texas files production by lease, and where a lease lies in more than one county the split is the RRC's. Nothing here is estimated by Petrora. Wells from the RRC wellbore file and the permit record. Drilling permits from the RRC OGA049M master and daily daf420 files, rebuilt nightly into per-county figures; windows are on the date issued. Disposal from UIC permits and H-10 reports at the last settled month; earthquakes from the TexNet catalog inside the county's located-permit footprint.

Developers: this page as JSON is GET /v1/data/counties/tx/jefferson?days=90, documented in the API reference.