WELL · 42-255-34939 · DISTRICT 2
Jauer-Sonka Unit #4H
Karnes County · Eagleville (Eagle Ford-2) field · Producing · Horizontal
Jauer-Sonka Unit #4H (API 42-255-34939) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed July 4, 2016 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued February 11, 2016, permitted to 10,926 ft.
Completion filings report 10 formation tops, including Frio, Yegua, Queen City, Reklaw.
Its lease has reported 3.01M barrels of oil and 3.49M mcf of gas since May 2013, last reporting in July 2026. The lease carries 9 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 26, 2025
- Permits on file
- 3,191
- Phone
- (832) 486-2737
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Apr 2026 |
| Latest permit | Marathon Oil EF LLCFeb 11, 2016 |
- 10,926
- total depth, ft
- 1
- permits on file
- Feb 11, 2016
- last permit issued
- Jul 4, 2016
- completed
- 3.01M
- cumulative oil, bbl
- 3.49M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2013 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 4, 2016
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; they carry 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Jauer-Sonka Unit O-2-10590 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 9 | 3.01M | 3.49M | May 2013 – Jul 2026 |
Oil, barrels lease total
Last 12 months 84,987 · prior 12 97,475(-13%)
Gas, mcf lease total
Last 12 months 61,484 · prior 12 86,799(-29%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJul 2013 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 813801-99 | Drill | Marathon Oil EF LLC | Feb 10, 2016 | Feb 11, 2016 | Mar 24, 2016 | 17,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 4, 2016 | Jauer-Sonka Unit O-2-10590 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Producing | 10,926 |
Formation tops
As filed on W-2/G-1. Subsea from 275 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| FrioFRIO - DISPOSAL | 434 | -159 |
| YeguaYEGUA - DISPOSAL | 1,488 | -1,213 |
| Queen City | 3,443 | -3,168 |
| Reklaw | 3,835 | -3,560 |
| Carrizo | 4,337 | -4,062 |
| WilcoxWILCOX - DISPOSAL | 5,623 | -5,348 |
| Austin ChalkAUSTIN CHALK - H2S | 10,786 | -10,511 |
| Eagle FordEAGLE FORD - H2S | 11,041 | -10,766 |
| EdwardsEDWARDS - H2S | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,351 | 16,210 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,138 | 12.25 | 1,535 S |
| 5.5 | 16,316 | 8.5 | 2,673 S |
Completion filings
W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Aug 1, 2016 | Jul 25, 2016 | Yes |
The source documents
Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.
- Wellbore filings for 42-255-34939 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-34939 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.
About this data
Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
Developers: this page as JSON is GET /v1/data/wells/25534939, documented in the API reference.