WELL · 42-283-32310 · DISTRICT 1
Mumme Ranch #12H
LA Salle County · Eagleville (Eagle Ford) field · Horizontal
Mumme Ranch #12H (API 42-283-32310) is a horizontal well in La Salle County operated by Carrizo Oil & Gas Inc., completed September 28, 2010.
The RRC has issued one drilling permit (amended 3 times), issued July 13, 2010, permitted to 10,500 ft.
Completion filings report 2 formation tops, including Austin Chalk, Eagle Ford.
Its 2 leases have reported 1.9M barrels of oil and 3.97M mcf of gas since September 2010, last reporting in July 2026. The leases carry 14 wells, so these are lease totals, not this well alone.
Operator of record
Houston, TX · P-5 Inactive, filed Jan 7, 2021 · 1,194 permits on file · (713) 328-1000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Carrizo Oil & Gas Inc. |
| Production reports | Verdun Oil EF II LLCthrough Apr 2026 |
| Latest permit | Carrizo Oil & Gas, Inc.Jul 13, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,500
- total depth, ft
- 4
- permits on file
- Jul 13, 2010
- last permit issued
- Sep 28, 2010
- completed
- 1.9M
- cumulative oil, bbl
- 3.97M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 28, 2010
- Shut in
- —
- Plugged
- —
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 14 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mumme Ranch O-1-15385 | Eagleville (Eagle Ford-1) | Verdun Oil EF II LLC | 12 | 1.89M | 3.95M | Dec 2010 – Jul 2026 |
| Mumme Ranch O-2-9589 | Eagleville (Eagle Ford) | Carrizo Oil & Gas, Inc. | 2 | 14.8K | 18.9K | Sep 2010 – Jan 2012 |
Oil, barrels lease total
Last 12 months 55,294 · prior 12 72,998(-24%)
Gas, mcf lease total
Last 12 months 142,315 · prior 12 176,165(-19%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Carrizo Oil & Gas, Inc.Nov 2010 → Mar 2012
- 2Carrizo (Eagle Ford) LLCApr 2012 → Jan 2018
- 3EP Energy E&P Company, L.P.Feb 2018 → Apr 2022
- 4EP Energy E&P Company, LLCMay 2022 → Feb 2025
- 5Verdun Oil EF II LLCMar 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 698825-96 | Drill | Carrizo Oil & Gas, Inc. | Jul 15, 2011 | Jul 13, 2010 | Jul 14, 2010 | 10,500 |
| 698825-97 | Drill | Carrizo Oil & Gas, Inc. | Jan 12, 2011 | Jul 13, 2010 | Jul 14, 2010 | 10,500 |
| 698825-98 | Drill | Carrizo Oil & Gas, Inc. | Dec 8, 2010 | Jul 13, 2010 | Jul 14, 2010 | 10,500 |
| 698825-99 | Drill | Carrizo Oil & Gas, Inc. | Jul 12, 2010 | Jul 13, 2010 | Jul 14, 2010 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-15385 | — | — | — | — |
| — | — O-2-9589 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 395 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 8,890 | -8,495 |
| Eagle FordMIDDLE EAGLEFORD | 9,567 | -9,172 |
| Eagle FordLOWER EAGLEFORD | 9,715 | -9,320 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,311 | 15,295 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 3,870 | 14.75 | 2,143 S |
| 5.5 | 15,422 | 8.75 | 2,785 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 | Oct 4, 2011 | Jan 21, 2011 | Yes |
| 00 | Sep 9, 2011 | Jan 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 42-283-32310 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-283-32310 → 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/28332310, documented in the API reference.