WELL · 42-481-33916 · DISTRICT 3
Swanson #4
Wharton County · Vertical
Swanson #4 (API 42-481-33916) is a permitted well in Wharton County filed by Unoso Operating Company L.L.C.; no completion report is on file yet.
The RRC has issued 3 drilling permits between 1996 and 2007, permitted to 5,500 ft.
Completion filings report 3 formation tops, including Micocen, Catahoula, Frio.
Its 2 leases have reported 538 barrels of oil and 6.4K mcf of gas since April 1997, last reporting in September 2001. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Unoso Operating Company L.L.C.
Georgetown, TX · P-5 Y, filed May 29, 2025 · 13 permits on file · (512) 887-3961
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Hollimon Oil Corporationthrough Nov 1998 |
| Latest permit | Unoso Operating Company L.L.C.Jul 12, 2007 |
- 5,500
- total depth, ft
- 3
- permits on file
- Jul 12, 2007
- last permit issued
- —
- completed
- 538
- cumulative oil, bbl
- 6.4K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 1997 THROUGH Sep 2001
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 |
|---|---|---|---|---|---|---|
| Swanson "B" O-3-23213 | Canuck (Hillje) | Hollimon Oil Corporation | 1 | 538 | 6.4K | Apr 1997 – Sep 2001 |
| Swanson B G-3-175696 | Trans-Tex (3000 Cat.) | Hollimon Oil Corporation | 1 | 0 | 0 | Dec 1998 – Jul 2001 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hollimon Oil CorporationApr 1997 → Oct 1997
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 639480-99 | Reenter | Unoso Operating Company L.L.C. | May 23, 2007 | Jul 12, 2007 | Jul 12, 2007 | 4,290 |
| 480434-99 | Recompletion | Hollimon Oil Corporation | Oct 26, 1998 | Oct 28, 1998 | Dec 14, 1998 | 4,000 |
| 452786-99 | Drill | Hollimon Oil Corporation | Sep 18, 1996 | Oct 1, 1996 | Oct 21, 1996 | 5,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-175696 | — | — | — | — |
| — | — O-3-23213 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 110 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,981 | 2,985 | Perforated |
| 4,215 | 4,234 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 571 | 12.25 | 370 S |
| 9.625 | 571 | 13.5 | 420 S |
| 5.5 | 4,378 | 7.875 | 900 S |
| 5.5 | 4,378 | 8.75 | 900 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 | Feb 28, 2000 | Jan 20, 2000 | Yes |
| 00 | Feb 16, 2000 | — | — |
| 00 | May 20, 1997 | Apr 30, 1997 | Yes |
| 00 | May 12, 1997 | — | — |
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 42-481-33916 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-481-33916 → 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/48133916, documented in the API reference.