TEXAS · WELLS · MCMULLEN COUNTY · COBRA B LEASE · API 42-311-35111 · DISTRICT 01
Cobra B #1H
McMullen County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Cobra B #1H (API 42-311-35111) is a horizontal well in Mcmullen County operated by Javelin Energy Partners Mgmt LLC, completed February 22, 2014 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued September 18, 2012, permitted to 9,862 ft.
It was permitted by Abraxas Petroleum Corporation and has since transferred to Javelin Energy Partners Mgmt LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Omlos, Olmos, Austin Chalk, Eaglford.
Its lease has reported 165K barrels of oil and 195K mcf of gas since November 2012, last reporting volume in March 2026.
Operator of record
Javelin Energy Partners Mgmt LLC
Permitted by Abraxas Petroleum Corporation; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 24, 2026
- Permits on file
- 234
- Phone
- (469) 575-3800
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Javelin Energy Partners Mgmt LLC |
| Production reports | Javelin Energy Partners Mgmt LLCthrough Mar 2026 |
| Latest permit | Abraxas Petroleum CorporationSep 18, 2012 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,862
- total depth, ft
- 1
- permits on file
- Sep 18, 2012
- last permit issued
- Feb 22, 2014
- completed
- 165K
- cumulative oil, bbl
- 195K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2012 THROUGH Mar 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 22, 2014
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 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 |
|---|---|---|---|---|---|---|
| Cobra B O-1-16349 | Eagleville (Eagle Ford-1) | Javelin Energy Partners Mgmt LLC | 1 | 165K | 195K | Nov 2012 – Mar 2026 |
Oil, barrels lease total
Last 12 months 22,661 · prior 12 32,082(-29%)
Gas, mcf lease total
Last 12 months 39,906 · prior 12 32,361(+23%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Abraxas Petroleum CorporationNov 2012 → Nov 2013
- 2Sanchez Oil & Gas CorporationDec 2013 → Apr 2014
- 3SN Operating, LLCMay 2014 → Nov 2016
- 4Carrizo (Eagle Ford) LLCDec 2016 → Jan 2020
- 5Callon (Eagle Ford) LLCFeb 2020 → Jun 2023
- 6Ridgemar Energy Operating, LLCJul 2023 → Jan 2025
- 7Javelin Energy Partners Mgmt LLCFeb 2025 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 747110-99 | Drill | Abraxas Petroleum Corporation | Aug 24, 2012 | Sep 18, 2012 | Oct 3, 2012 | 10,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 22, 2014 | Cobra B O-1-16349 | Eagleville (Eagle Ford-1) | Javelin Energy Partners Mgmt LLC | Producing | 9,862 |
Formation tops
As filed on W-2/G-1. Subsea from 287 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Omlos | 7,828 | -7,541 |
| OlmosTOP OLMOS | 7,828 | -7,541 |
| Austin Chalk | 9,477 | -9,190 |
| Austin ChalkTOP AUSTIN CHALK | 9,477 | -9,190 |
| Eaglford | 9,941 | -9,654 |
| Eagle FordTOP EAGLEFORD SHALE | 9,941 | -9,654 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,523 | 14,868 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,625 | 12.25 | 1,510 S |
| 5.5 | 15,105 | 8.75 | 2,112 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 8, 2016 | Oct 22, 2015 | — |
| 00 | Apr 6, 2015 | Dec 2, 2014 | — |
| 00 | Mar 6, 2013 | Jan 2, 2013 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Nov 3, 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 Omlos, Olmos, Austin Chalk, Eagle Ford, Eaglford | TIFF | 9,268 to 15,110 | Nov 3, 2015run Oct 19, 2012 | 1.30 |
"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 42-311-35111 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-35111 → 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/31135111, documented in the API reference.