TEXAS · WELLS · KARNES COUNTY · WESSENDORFF 01 LEASE · API 42-255-31846 · DISTRICT 02
Wessendorff 01 #01H
Karnes County · Sugarkane (Eagle Ford) field · Producing · Horizontal
Wessendorff 01 #01H (API 42-255-31846) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed October 31, 2011 and listed as producing on the RRC schedule, shut in August 1, 2020.
The RRC has issued one drilling permit, issued January 20, 2011, permitted to 13,028 ft.
It was permitted by Pioneer Natural Res. USA, Inc. and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Carrizo, Eagle Ford, Midway.
Its lease has reported 309K barrels of oil and 1M mcf of gas since October 2011, last reporting volume in February 2024.
Operator of record
Permitted by Pioneer Natural Res. USA, Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Oct 13, 2026
- 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 Feb 2024 |
| Latest permit | Pioneer Natural Res. USA, Inc.Jan 20, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,028
- total depth, ft
- 1
- permits on file
- Jan 20, 2011
- last permit issued
- Oct 31, 2011
- completed
- 309K
- cumulative oil, bbl
- 1M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · NOV 2011 THROUGH FEB 2024
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 31, 2011
- Shut in
- Aug 1, 2020
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH AUG 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Wessendorff 01 G-2-266608 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | 1 | 309K | 1M | Oct 2011 – Feb 2024 |
Gas, mcf lease total
Last 12 months 0 · prior 12 0
Wells named Wessendorff 01
Marathon Oil EF LLC's other wells filed under this lease name in Karnes County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Nov 2011 → Sep 2019
- 2Ensign Operating LLCOct 2019 → Feb 2023
- 3Marathon Oil EF LLCMar 2023 → Feb 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 708671-99 | Drill | Pioneer Natural Res. USA, Inc. | Jan 18, 2011 | Jan 20, 2011 | Aug 9, 2011 | 21,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 31, 2011 | Wessendorff 01 G-2-266608 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | Producing · shut in Aug 1, 2020 | 13,028 |
Formation tops
As filed on W-2/G-1. Subsea from 325 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Carrizo | — | — |
| Eagle Ford | — | — |
| Midway | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 13,400 | 18,932 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 765 | 17.5 | 760 S |
| 9.625 | 9,488 | 12.25 | 390 S |
| 5.5 | 19,071 | 8.5 | 1,920 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 | Mar 15, 2013 | Apr 19, 2012 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Sep 15, 2014. Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| RESISTIVITY | TIFF | 9,510 to 19,071 | Sep 15, 2014run Sep 3, 2011 | 5.32 |
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 42-255-31846 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-31846 → 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/25531846, documented in the API reference.