TEXAS · WELLS · KARNES COUNTY · HOLLMAN UNIT LEASE · API 42-255-31821 · DISTRICT 02
Hollman Unit #1H
Karnes County · Sugarkane (Eagle Ford) field · Producing · Horizontal
- Fields on the latest permit · any of 2
- Eagleville (Eagle Ford-2) · Sugarkane (Eagle Ford)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Hollman Unit #1H (API 42-255-31821) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed February 13, 2011 and listed as producing on the RRC schedule, shut in May 1, 2026.
The RRC has issued one drilling permit (amended once), issued December 21, 2010, permitted to 12,425 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 260K barrels of oil and 1.08M mcf of gas since February 2011, last reporting volume in April 2026.
Operator of record
Permitted by Hilcorp Energy Company; 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 Apr 2026 |
| Latest permit | Hilcorp Energy CompanyDec 21, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,425
- total depth, ft
- 2
- permits on file
- Dec 21, 2010
- last permit issued
- Feb 13, 2011
- completed
- 260K
- cumulative oil, bbl
- 1.08M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · MAR 2011 THROUGH APR 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 13, 2011
- Shut in
- May 1, 2026
- 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 |
|---|---|---|---|---|---|---|
| Hollman Unit G-2-261242 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | 1 | 260K | 1.08M | Feb 2011 – Apr 2026 |
Gas, mcf lease total
Last 12 months 617 · prior 12 13,147(-95%)
Wells named Hollman 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.
- 1Hilcorp Energy CompanyMar 2011 → Oct 2011
- 2Marathon Oil EF LLCNov 2011 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 707272-98 | Drill | Hilcorp Energy Company | Jan 4, 2011 | Dec 21, 2010 | Jan 23, 2011 | 13,500 |
| 707272-99 | Drill | Hilcorp Energy Company | Dec 17, 2010 | Dec 21, 2010 | Jan 23, 2011 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 13, 2011 | Hollman Unit G-2-261242 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | Producing · shut in May 1, 2026 | 12,425 |
Formation tops
As filed on W-2/G-1. Subsea from 427 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 11,880 | -11,453 |
| Austin Chalk | 11,880 | -11,453 |
| Austin Chalk | 12,025 | -11,598 |
| Eagle Ford | 12,190 | -11,763 |
| Eagle Ford | 12,330 | -11,903 |
| Anacacho | 12,424 | -11,997 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,380 | 17,444 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 6,090 | 12.5 | 2,495 S |
| 10.75 | 6,090 | 13.5 | 2,495 S |
| 5.5 | 17,569 | 8.25 | 2,691 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 | Sep 25, 2012 | Apr 4, 2012 | — |
| 00 | Sep 24, 2012 | Aug 31, 2011 | Yes |
| 00 | Nov 10, 2011 | Mar 21, 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 42-255-31821 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-31821 → 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/25531821, documented in the API reference.