WELL · 42-479-35185 · DISTRICT 4
South Callaghan Ranch #41
Webb County · Vertical
South Callaghan Ranch #41 (API 42-479-35185) is a permitted well in Webb County filed by Calpine Natural Gas L.P.; no completion report is on file yet.
The RRC has issued 3 drilling permits (amended twice) between 1991 and 2005, permitted to 9,150 ft.
Completion filings report 3 formation tops, including Wilcox, Lobo 1, Lobo 6.
Operator of record
Houston, TX · P-5 Y, filed Dec 8, 2006 · 85 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Aldine Oil and Gas, LPthrough Apr 2026 |
| Latest permit | Calpine Natural Gas L.P.Sep 21, 2005 |
- 9,150
- total depth, ft
- 5
- permits on file
- Sep 21, 2005
- last permit issued
- —
- completed
- 0
- cumulative oil, bbl
- 583K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- 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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| South Callaghan Ranch G-4-139686 | Brettchance (Lobo 6) | Aldine Oil and Gas, LP | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| South Callaghan Ranch G-4-143216 | Beccero Creek (Lobo Cons.) | Aldine Oil and Gas, LP | 1 | 0 | 583K | Jan 1993 – Jul 2026 |
Gas, mcf lease total
Last 12 months 7,530 · prior 12 5,787(+30%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mobil Producing TX. & N.M. Inc.Jan 1993 → Mar 1998
- 2Michael Petroleum CorporationMay 1998 → Jul 1998
- 3Calpine Natural Gas L.P.Sep 2005 → Dec 2005
- 4Rosetta Resources Operating LPJan 2006 → Mar 2012
- 5Pinpoint Energy Operating, LLCApr 2012 → Aug 2012
- 6Petropoint Energy Operating, LLCSep 2012 → Jul 2014
- 7White Oak Operating Company LLCAug 2014 → Feb 2023
- 8Aldine Oil and Gas, LPMar 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 606595-99 | Recompletion | Calpine Natural Gas L.P. | Sep 19, 2005 | Sep 21, 2005 | — | 8,400 |
| 402178-98 | Recompletion | Mobil Producing TX. & N.M. Inc. | Sep 9, 1992 | Aug 14, 1992 | Oct 18, 1992 | 9,150 |
| 402178-99 | Recompletion | Mobil Producing TX. & N.M. Inc. | Aug 10, 1992 | Aug 14, 1992 | — | 9,150 |
| 384978-98 | Drill | Mobil Producing TX. & N.M. Inc. | Aug 28, 1991 | Feb 28, 1991 | Jun 10, 1991 | 9,150 |
| 384978-99 | Drill | Mobil Producing TX. & N.M. Inc. | Feb 22, 1991 | Feb 28, 1991 | — | 9,150 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-139686 | — | — | — | — |
| — | — G-4-143216 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 538 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| WilcoxMIDDLE WILCOX | 5,700 | -5,162 |
| Lobo 1 | 7,370 | -6,832 |
| Lobo 6 | 7,900 | -7,362 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,490 | 7,510 | Perforated |
| 7,490 | 7,566 | Perforated |
| 7,556 | 7,566 | Perforated |
| 7,912 | 7,936 | Perforated |
| 7,983 | 7,994 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 16 | 60 | — | — |
| 9.625 | 3,990 | 12.25 | 1,630 S |
| 7 | 6,300 | 8.75 | 410 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 | Apr 13, 2006 | Oct 3, 2005 | — |
| 00 | Jan 26, 1993 | Dec 9, 1992 | — |
| 00 | Jan 15, 1993 | Nov 30, 1992 | Yes |
| 00 | Dec 28, 1992 | — | — |
| 00 | Nov 27, 1991 | Sep 5, 1991 | Yes |
| 00 | Nov 1, 1991 | — | — |
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 42-479-35185 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-479-35185 → 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/47935185, documented in the API reference.