TEXAS · WELLS · KARNES COUNTY · API 42-255-31992 · DISTRICT 02
Pfeifer Unit #1H
Karnes County · Eagleville (Eagle Ford-2) field · Temp Abandoned · Horizontal
Pfeifer Unit #1H (API 42-255-31992) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed July 27, 2011 and listed as temp abandoned on the RRC schedule, shut in June 1, 2018.
The RRC has issued one drilling permit, issued June 8, 2011, permitted to 11,547 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 2 leases have reported 810K barrels of oil and 1.53M mcf of gas since April 2011, last reporting volume in April 2026. The leases carry 5 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 CompanyJun 8, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,547
- total depth, ft
- 1
- permits on file
- Jun 8, 2011
- last permit issued
- Jul 27, 2011
- completed
- 810K
- cumulative oil, bbl
- 1.53M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2011 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 27, 2011
- Shut in
- Jun 1, 2018
- 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 2 leases this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Pfeifer Unit O-2-9817 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 4 | 683K | 1.31M | Apr 2011 – Apr 2026 |
| Pfeifer Unit G-2-289126 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 127K | 218K | Nov 2011 – Feb 2020 |
Oil, barrels lease total
Last 12 months 3,716 · prior 12 11,470(-68%)
Gas, mcf lease total
Last 12 months 4,086 · prior 12 13,296(-69%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hilcorp Energy CompanyJul 2011 → Oct 2011
- 2Marathon Oil EF LLCNov 2011 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 717715-99 | Drill | Hilcorp Energy Company | Jun 3, 2011 | Jun 8, 2011 | Jun 13, 2011 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 27, 2011 | Pfeifer Unit G-2-289126 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Temp Abandoned · shut in Jun 1, 2018 | 11,547 |
| Jul 27, 2011 | Pfeifer Unit O-2-9817 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 471 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 11,403 | -10,932 |
| Austin Chalk | 11,542 | -11,071 |
| Eagle Ford | 11,735 | -11,264 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,929 | 16,752 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 6,223 | 13.5 | 2,575 S |
| 5.5 | 16,851 | 8.5 | 2,635 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 | Oct 2, 2023 | Sep 27, 2023 | — |
| 00 | Jun 12, 2020 | May 19, 2020 | — |
| 00 | Mar 9, 2012 | Nov 11, 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 42-255-31992 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-31992 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/25531992, documented in the API reference.