WELL · 42-131-36250 · DISTRICT 4
Olvera Gas Unit #4
Duval County · J.R. (5505) field · Vertical
Olvera Gas Unit #4 (API 42-131-36250) is a plugged well in Duval County, plugged June 5, 2007, last operated by Hamilton J. R..
The RRC has issued 2 drilling permits between 1983 and 1986, permitted to 6,500 ft.
It was permitted by Hamilton, J. R. & Archer, J.R. and has since transferred to Hamilton J. R. on the wellbore schedule.
Completion filings report 5 formation tops, including Miocene (undifferentiated), Frio, Transition, 1st Hockley.
Operator of record
Permitted by Hamilton, J. R. & Archer, J.R.; the EWA schedule now lists a different operator.
Carrizo Spgs, TX · P-5 Y, filed Feb 4, 2026 · 58 permits on file · (830) 876-8667
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hamilton J. R. |
| Production reports | Hamilton, J. R.through Jan 1995 |
| Latest permit | Hamilton, J. R. & Archer, J.R.Jun 2, 1986 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,500
- total depth, ft
- 2
- permits on file
- Jun 2, 1986
- last permit issued
- Jul 21, 1983
- completed
- 0
- cumulative oil, bbl
- 6.36K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Dec 2007
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 21, 1983
- Shut in
- —
- Plugged
- Jun 5, 2007
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 |
|---|---|---|---|---|---|---|
| Olvera Gas Unit G-4-122125 | J.R. (5194) | Hamilton, J. R. | 1 | 0 | 6.36K | Jan 1993 – Dec 2007 |
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.
- 1Hamilton, J. R.Jan 1993 → Jan 1995
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 302798-99 | Recompletion | Hamilton, J. R. & Archer, J.R. | May 28, 1986 | Jun 2, 1986 | — | 6,500 |
| 194770-99 | Drill | Hamilton, J. R. & Archer, J.R. | Sep 23, 1983 | May 12, 1983 | May 21, 1983 | 6,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-122125 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 320 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)BASE OF MIOCENE | 2,900 | -2,580 |
| FrioTOP/FRIO | 3,100 | -2,780 |
| Transition | 5,500 | -5,180 |
| 1ST Hockley | 5,910 | -5,590 |
| 2ND Hockley | 6,055 | -5,735 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,194 | 5,200 | Perforated |
| 5,524 | 5,534 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,633 | 12.25 | 656 S |
| 2.375 | 5,464 | — | — |
| 4.5 | 5,900 | 7.875 | 1,317 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 | Dec 2, 1986 | Aug 11, 1986 | Yes |
| 00 | Oct 1, 1986 | — | — |
| 00 | Jan 12, 1984 | Aug 31, 1983 | — |
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 42-131-36250 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-131-36250 → 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/13136250, documented in the API reference.