TEXAS · WELLS · ATASCOSA COUNTY · API 42-013-34308 · DISTRICT 01
Tom #1H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Tom #1H (API 42-013-34308) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed October 9, 2010 and listed as producing on the RRC schedule.
The RRC has issued 3 drilling permits between 2010 and 2012, permitted to 10,586 ft.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its 3 leases have reported 169K barrels of oil and 139K mcf of gas since August 2010, last reporting in July 2026. The leases carry 3 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 LLCAug 16, 2012 |
- 10,586
- total depth, ft
- 3
- permits on file
- Aug 16, 2012
- last permit issued
- Oct 9, 2010
- completed
- 169K
- cumulative oil, bbl
- 139K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 9, 2010
- 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 3 leases this well is completed on; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Tom O-1-15898 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 1 | 148K | 120K | Dec 2010 – Jul 2026 |
| Tom O-2-9951 | Eagleville (Eagle Ford) | Hilcorp Energy Company | 1 | 21.2K | 18.7K | Oct 2010 – Dec 2012 |
| Tom G-2-260556 | Sugarkane (Cretaceous) | Hilcorp Energy Company | 1 | 0 | 0 | Aug 2010 – Oct 2010 |
Oil, barrels lease total
Last 12 months 2,725 · prior 12 715(+281%)
Gas, mcf lease total
Last 12 months 185 · prior 12 243(-24%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hilcorp Energy CompanyOct 2010 → Nov 2010
- 2Marathon Oil EF LLCDec 2010 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 746018-99 | Recompletion | Marathon Oil EF LLC | Aug 7, 2012 | Aug 16, 2012 | — | 10,586 |
| 723927-99 | Recompletion | Hilcorp Energy Company | Sep 9, 2011 | Oct 18, 2011 | Aug 26, 2010 | 13,500 |
| 697104-99 | Drill | Hilcorp Energy Company | Jun 7, 2010 | Jun 8, 2010 | Jul 19, 2010 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 9, 2010 | Tom O-1-15898 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | Producing | 10,586 |
| Oct 9, 2010 | Tom O-2-9951 | Eagleville (Eagle Ford) | Hilcorp Energy Company | Not on Schedule | — |
| Aug 3, 2010 | Tom G-2-260556 | Sugarkane (Cretaceous) | Marathon Oil EF LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 410 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 10,405 | -9,995 |
| Austin Chalk | 10,564 | -10,154 |
| Eagle Ford | 10,730 | -10,320 |
| Anacacho | — | — |
| Austin Chalk | — | — |
| Eagle Ford | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,650 | 15,704 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 5,260 | 12.25 | 1,335 S |
| 10.75 | 5,260 | 13.5 | 2,040 S |
| 5.5 | 8,562 | 8.5 | 2,075 S |
| 4.5 | 15,839 | 8.5 | 670 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 | Jul 13, 2012 | Oct 20, 2011 | Yes |
| 00 | May 25, 2012 | Oct 20, 2011 | Yes |
| 00 | Aug 22, 2011 | Dec 8, 2010 | 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 42-013-34308 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-34308 → 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/01334308, documented in the API reference.