TEXAS · WELLS · KARNES COUNTY · CULBERSON-PATTESON UNIT LEASE · API 42-255-34877 · DISTRICT 02
Culberson-Patteson Unit #501H
Karnes County · Eagleville (Eagle Ford-2) field · Producing · Horizontal
Culberson-Patteson Unit #501H (API 42-255-34877) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed March 14, 2017 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 14, 2015, permitted to 12,103 ft.
Completion filings report 10 formation tops, including Yegua, Queen City, Reklaw, Carrizo.
Its lease has reported 1.46M barrels of oil and 3.74M mcf of gas since July 2012, last reporting volume in April 2026. The lease carries 7 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 LLCDec 14, 2015 |
- 12,103
- total depth, ft
- 2
- permits on file
- Dec 14, 2015
- last permit issued
- Mar 14, 2017
- completed
- 1.46M
- cumulative oil, bbl
- 3.74M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2012 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 14, 2017
- 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 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Culberson-Patteson Unit O-2-10315 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 7 | 1.46M | 3.74M | Jul 2012 – Apr 2026 |
Oil, barrels lease total
Last 12 months 19,301 · prior 12 29,301(-34%)
Gas, mcf lease total
Last 12 months 50,866 · prior 12 155,302(-67%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCOct 2012 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 812454-98 | Drill | Marathon Oil EF LLC | Sep 9, 2016 | Dec 14, 2015 | Nov 12, 2016 | 19,200 |
| 812454-99 | Drill | Marathon Oil EF LLC | Dec 3, 2015 | Dec 14, 2015 | Nov 12, 2016 | 19,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 14, 2017 | Culberson-Patteson Unit O-2-10315 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Producing | 12,103 |
Formation tops
As filed on W-2/G-1. Subsea from 418 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 1,934 | -1,516 |
| Queen City | 4,266 | -3,848 |
| Reklaw | 4,730 | -4,312 |
| Carrizo | 5,233 | -4,815 |
| WilcoxWILCOX - DISPOSAL | 6,557 | -6,139 |
| Austin ChalkAUSTIN CHALK - H2S | 12,025 | -11,607 |
| Eagle FordEAGLE FORD - H2S | 12,202 | -11,784 |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,543 | 17,459 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,858 | 12.25 | 1,330 S |
| 5.5 | 17,562 | 8.5 | 2,200 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | May 16, 2017 | May 10, 2017 | Yes |
Well logs
The RRC's map lists this well among those with logs online. Its monthly inventories loaded here, which start in July 2006, list none for it, so none are itemized.
Open the RRC's log search for this well ↗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 42-255-34877 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-34877 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/25534877, documented in the API reference.