TEXAS · WELLS · KARNES COUNTY · SIENKIEWICZ UNIT LEASE · API 42-255-32547 · DISTRICT 02
Sienkiewicz Unit #6H
Karnes County · Sugarkane (Eagle Ford) field · Temp Abandoned · Horizontal
Sienkiewicz Unit #6H (API 42-255-32547) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed September 1, 2021 and listed as temp abandoned on the RRC schedule, shut in September 1, 2022.
The RRC has issued one drilling permit, issued June 18, 2012, permitted to 12,593 ft.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its lease has reported 328K barrels of oil and 1.49M mcf of gas since October 2012, with no volume in the three years through August 2026.
Operator of record
- 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 Apr 2026 |
| Latest permit | Marathon Oil EF LLCJun 18, 2012 |
- 12,593
- total depth, ft
- 1
- permits on file
- Jun 18, 2012
- last permit issued
- Sep 1, 2021
- completed
- 328K
- cumulative oil, bbl
- 1.49M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · NOV 2012 THROUGH APR 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 1, 2021
- Shut in
- Sep 1, 2022
- 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 |
|---|---|---|---|---|---|---|
| Sienkiewicz Unit G-2-266858 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | 1 | 328K | 1.49M | Oct 2012 – Apr 2026 |
No volumes reported on these leases in the last three years.
Wells named Sienkiewicz Unit
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.
- 1Marathon Oil EF LLCNov 2012 → Aug 2022
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 740533-99 | Drill | Marathon Oil EF LLC | May 11, 2012 | Jun 18, 2012 | Aug 4, 2012 | 15,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 1, 2021 | Sienkiewicz Unit G-2-266858 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | Temp Abandoned · shut in Sep 1, 2022 | 12,593 |
Formation tops
As filed on W-2/G-1. Subsea from 293 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 12,255 | -11,962 |
| Austin Chalk | 12,410 | -12,117 |
| Eagle Ford | 12,577 | -12,284 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 13,145 | 18,732 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,861 | 12.25 | 2,405 S |
| 5.5 | 18,850 | 8.75 | 2,650 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 22, 2021 | Sep 16, 2021 | — |
| 00 | May 31, 2013 | May 10, 2013 | Yes |
| 00 | Mar 28, 2013 | Nov 19, 2012 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Dec 7, 2015. 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 |
|---|---|---|---|---|
| RESISTIVITYSpans Anacacho, Austin Chalk, Eagle Ford | 2 TIFF | 5,861 to 18,850 | Dec 7, 2015run Aug 22, 2012 | 5.17 + 1.44 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-255-32547 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-32547 → 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/25532547, documented in the API reference.