TEXAS · WELLS · KARNES COUNTY · API 42-255-33511 · DISTRICT 02
Blackjack Unit D #6H
Karnes County · Eagleville (Eagle Ford-2) 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.
Blackjack Unit D #6H (API 42-255-33511) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed July 4, 2014 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued February 6, 2014, permitted to 12,688 ft.
Completion filings report 11 formation tops, including Frio, Yegua, Queen City, Reklaw.
Its 2 leases have reported 195K barrels of oil and 1.49M mcf of gas since March 2014, last reporting volume in April 2026. The leases carry 7 wells, so these are lease totals, not this well alone.
Operator of record
- 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 | Marathon Oil EF LLCFeb 6, 2014 |
- 12,688
- total depth, ft
- 1
- permits on file
- Feb 6, 2014
- last permit issued
- Jul 4, 2014
- completed
- 195K
- cumulative oil, bbl
- 1.49M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2014 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 4, 2014
- 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.
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 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Blackjack Unit D G-2-285882 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 195K | 1.49M | Jul 2014 – Apr 2026 |
| Blackjack Unit D O-2-10819 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 6 | 0 | 0 | Mar 2014 – — |
Gas, mcf lease total
Last 12 months 23,017 · prior 12 11,044(+108%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJul 2014 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 775586-99 | Drill | Marathon Oil EF LLC | Dec 12, 2013 | Feb 6, 2014 | Jun 12, 2014 | 19,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 4, 2014 | Blackjack Unit D G-2-285882 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Producing | 12,688 |
| Apr 20, 2015 | Blackjack Unit D O-2-10819 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 288 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| FrioFRIO - DISPOSAL | 1,500 | -1,212 |
| YeguaYEGUA - DISPOSAL | 1,924 | -1,636 |
| Queen City | 4,273 | -3,985 |
| Reklaw | 4,531 | -4,243 |
| Carrizo | 5,085 | -4,797 |
| WilcoxWILCOX - DISPOSAL | 6,402 | -6,114 |
| Anacacho | 12,414 | -12,126 |
| Austin Chalk | 12,567 | -12,279 |
| Austin ChalkAUSTIN CHALK - H2S | 12,567 | -12,279 |
| Eagle Ford | 12,682 | -12,394 |
| Eagle FordEAGLE FORD - H2S | 12,682 | -12,394 |
| Carrizo | — | — |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| Queen City | — | — |
| Reklaw | — | — |
| SligoSLIGO - H2S | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,779 | 18,784 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,716 | 12.25 | 1,710 S |
| 5.5 | 19,220 | 8.5 | 2,215 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 11, 2019 | Jan 16, 2019 | — |
| 00 | Aug 31, 2016 | Aug 26, 2016 | Yes |
| 00 | Oct 10, 2014 | Jul 22, 2014 | Yes |
| 00 | Aug 25, 2014 | Jun 17, 2014 | Yes |
Well logs
2 logs loaded from the RRC's log index, 2 of them with a digital LAS file, the latest received Jun 26, 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 Wilcox, Anacacho, Austin Chalk, Eagle Ford | LAS + TIFF | 12,285 to 19,002 | Jun 26, 2017 | 0.51 + 21.4 |
| Gamma RaySpans Wilcox, Anacacho, Austin Chalk, Eagle Ford | LAS + TIFF | 12,285 to 19,220 | Mar 2, 2017 | 0.51 + 21.4 |
"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 42-255-33511 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-33511 → 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/25533511, documented in the API reference.