WELL · 42-311-34657 · DISTRICT 1
Tag Unit #12H
McMullen County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Tag Unit #12H (API 42-311-34657) is a horizontal well in Mcmullen County operated by Javelin Energy Partners Mgmt LLC, completed March 18, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended twice), issued September 6, 2011, permitted to 10,177 ft.
It was permitted by Carrizo Oil & Gas, Inc. and has since transferred to Javelin Energy Partners Mgmt LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Carrizo, Austin Chalk, Eagle Ford.
Its lease has reported 983K barrels of oil and 724K mcf of gas since December 2011, last reporting in July 2026. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Javelin Energy Partners Mgmt LLC
Permitted by Carrizo Oil & Gas, Inc.; 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
- 233
- 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 | Carrizo Oil & Gas, Inc.Sep 6, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,177
- total depth, ft
- 3
- permits on file
- Sep 6, 2011
- last permit issued
- Mar 18, 2012
- completed
- 983K
- cumulative oil, bbl
- 724K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2011 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 18, 2012
- 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; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Tag Unit O-1-15719 | Eagleville (Eagle Ford-1) | Javelin Energy Partners Mgmt LLC | 3 | 983K | 724K | Dec 2011 – Jul 2026 |
Oil, barrels lease total
Last 12 months 1,523 · prior 12 6,724(-77%)
Gas, mcf lease total
Last 12 months 4,096 · prior 12 12,497(-67%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Carrizo (Eagle Ford) LLCMar 2012 → Jan 2020
- 2Callon (Eagle Ford) LLCFeb 2020 → Jun 2023
- 3Ridgemar Energy Operating, LLCJul 2023 → Jan 2025
- 4Javelin Energy Partners Mgmt LLCFeb 2025 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 723482-97 | Drill | Carrizo Oil & Gas, Inc. | Jun 11, 2012 | Sep 6, 2011 | Feb 9, 2012 | 11,000 |
| 723482-98 | Drill | Carrizo Oil & Gas, Inc. | Oct 11, 2011 | Sep 6, 2011 | Nov 24, 2011 | 11,000 |
| 723482-99 | Drill | Carrizo Oil & Gas, Inc. | Sep 1, 2011 | Sep 6, 2011 | Nov 24, 2011 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 18, 2012 | Tag Unit O-1-15719 | Eagleville (Eagle Ford-1) | Javelin Energy Partners Mgmt LLC | Producing | 10,177 |
Formation tops
As filed on W-2/G-1. Subsea from 352 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CarrizoBASE OF CARRIZO | 4,750 | -4,398 |
| Austin Chalk | 9,940 | -9,588 |
| Eagle Ford | 10,123 | -9,771 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,730 | 19,726 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 4,865 | 14.75 | 2,130 S |
| 5.5 | 19,930 | 8.75 | 3,356 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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Aug 22, 2012 | Jul 3, 2012 | — |
| 00 | May 2, 2012 | Feb 28, 2012 | 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 42-311-34657 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-34657 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.
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/31134657, documented in the API reference.