TEXAS · WELLS · KARNES COUNTY · CARTER UNIT LEASE · API 42-255-31796 · DISTRICT 02
Carter Unit #1H
Karnes County · Eagleville (Eagle Ford-2) field · Shut In · Horizontal
Carter Unit #1H (API 42-255-31796) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed June 13, 2011 and listed as shut in on the RRC schedule, shut in June 1, 2015.
The RRC has issued one drilling permit (amended once), issued November 19, 2010, permitted to 5,864 ft.
It was permitted by Hilcorp Energy Company and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its lease has reported 2.31M barrels of oil and 3.71M mcf of gas since June 2011, last reporting volume in April 2026. The lease carries 7 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Hilcorp Energy Company; the EWA schedule now lists a different operator.
- 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 | Hilcorp Energy CompanyNov 19, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,864
- total depth, ft
- 2
- permits on file
- Nov 19, 2010
- last permit issued
- Jun 13, 2011
- completed
- 2.31M
- cumulative oil, bbl
- 3.71M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2011 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 13, 2011
- Shut in
- Jun 1, 2015
- 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 |
|---|---|---|---|---|---|---|
| Carter Unit O-2-9683 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 7 | 2.31M | 3.71M | Jun 2011 – Apr 2026 |
Oil, barrels lease total
Last 12 months 37,987 · prior 12 46,754(-19%)
Gas, mcf lease total
Last 12 months 52,416 · prior 12 51,719(+1%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hilcorp Energy CompanyJun 2011 → Oct 2011
- 2Marathon Oil EF LLCNov 2011 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 705473-98 | Drill | Hilcorp Energy Company | Oct 3, 2011 | Nov 19, 2010 | Feb 15, 2011 | 13,500 |
| 705473-99 | Drill | Hilcorp Energy Company | Nov 16, 2010 | Nov 19, 2010 | Feb 15, 2011 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 13, 2011 | Carter Unit O-2-9683 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Shut In · shut in Jun 1, 2015 | 5,864 |
Formation tops
As filed on W-2/G-1. Subsea from 438 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 11,790 | -11,352 |
| Austin Chalk | 11,980 | -11,542 |
| Eagle Ford | 12,260 | -11,822 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,535 | 16,754 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 5,958 | 12.25 | 2,430 S |
| 5.5 | 16,878 | 8.5 | 2,625 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 | Jan 12, 2012 | Aug 22, 2011 | 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 42-255-31796 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-31796 → 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/25531796, documented in the API reference.