TEXAS · WELLS · DE WITT COUNTY · BOLDT 01 LEASE · API 42-123-33220 · DISTRICT 02
Boldt 01 #04H
De Witt County · De Witt (Eagle Ford Shale) field · Producing · Horizontal
Boldt 01 #04H (API 42-123-33220) is a horizontal well in De Witt County operated by Marathon Oil EF LLC, completed February 7, 2016 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 26, 2013, permitted to 13,654 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 8 formation tops, including Frio, Vicksburg, Yegua, Wilcox.
Its lease has reported 355K barrels of oil and 2.05M mcf of gas since September 2014, last reporting volume in April 2026.
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 (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 | Pioneer Natural Res. USA, Inc.Jul 26, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,654
- total depth, ft
- 1
- permits on file
- Jul 26, 2013
- last permit issued
- Feb 7, 2016
- completed
- 355K
- cumulative oil, bbl
- 2.05M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · SEP 2014 THROUGH APR 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 7, 2016
- Shut in
- —
- 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 APR 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 |
|---|---|---|---|---|---|---|
| Boldt 01 G-2-276234 | De Witt (Eagle Ford Shale) | Marathon Oil EF LLC | 1 | 355K | 2.05M | Sep 2014 – Apr 2026 |
Gas, mcf lease total
Last 12 months 16,839 · prior 12 22,979(-27%)
Wells named Boldt 01
Marathon Oil EF LLC's other wells filed under this lease name in De Witt 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.Sep 2014 → Sep 2019
- 2Ensign Operating LLCOct 2019 → Feb 2023
- 3Marathon Oil EF LLCMar 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 765460-99 | Drill | Pioneer Natural Res. USA, Inc. | Jun 26, 2013 | Jul 26, 2013 | Apr 18, 2014 | 21,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 7, 2016 | Boldt 01 G-2-276234 | De Witt (Eagle Ford Shale) | Marathon Oil EF LLC | Producing | 13,654 |
Formation tops
As filed on W-2/G-1. Subsea from 330 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Frio | 900 | -570 |
| Vicksburg | 2,249 | -1,919 |
| Yegua | 3,145 | -2,815 |
| Wilcox | 6,215 | -5,885 |
| Austin Chalk | 12,988 | -12,658 |
| Austin Chalk | 13,145 | -12,815 |
| Eagle Ford | 13,461 | -13,131 |
| Catahoula | — | — |
| EdwardsEDWARDS - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 13,710 | 19,943 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,516 | 17.5 | 1,115 S |
| 9.625 | 10,087 | 12.25 | 2,315 S |
| 5.5 | 20,057 | 8.5 | 3,780 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 24, 2017 | Oct 17, 2016 | Yes |
| 00 | Apr 2, 2015 | Nov 11, 2014 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Sep 28, 2017. Gamma ray. 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 |
|---|---|---|---|---|
| Gamma RaySpans Frio, Vicksburg, Yegua, Wilcox, Austin Chalk, Eagle Ford | TIFF | 0 to 18,053 | Sep 28, 2017 | 3.70 |
"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 42-123-33220 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-123-33220 → 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/12333220, documented in the API reference.