WELL · 42-493-31210 · DISTRICT 1
Hierholzer Alton #4
Wilson County · Higgins (Escondido) field · Producing · Vertical
Hierholzer Alton #4 (API 42-493-31210) is a well in Wilson County operated by Aaronmark Services LLC, completed October 21, 1983 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued February 15, 1983, permitted to 4,500 ft.
It was permitted by International Western Oil Corp. and has since transferred to Aaronmark Services LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Recklaw, Carrizo, Wilcox, Midway.
Its lease has reported 16.1K barrels of oil and 203 mcf of gas since January 1993, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by International Western Oil Corp.; the EWA schedule now lists a different operator.
New Braunfels, TX · P-5 Y, filed Sep 4, 2025 · (817) 201-8945
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Aaronmark Services LLC |
| Production reports | Aaronmark Services, LLCthrough Apr 2026 |
| Latest permit | International Western Oil Corp.Feb 15, 1983 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,500
- total depth, ft
- 1
- permits on file
- Feb 15, 1983
- last permit issued
- Oct 21, 1983
- completed
- 16.1K
- cumulative oil, bbl
- 203
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 21, 1983
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Hierholzer, Alton O-1-8703 | Higgins (Escondido) | Aaronmark Services, LLC | 4 | 16.1K | 203 | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 467 · prior 12 384(+22%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Southwest Production Mgmt. Co.Jan 1993 → Jul 1993
- 2European-Southwest Co.Nov 1993 → May 1995
- 3Wen-BEJun 1995 → Jul 2018
- 4Steindorf, Bert Oil & Gas Co.Feb 1997 → Jan 2000
- 5Lee Drlg & DevelpMar 2000 → Dec 2003
- 6WSMAug 2018 → Jun 2020
- 7Aaronmark Services, LLCAug 2020 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 186796-99 | Drill | International Western Oil Corp. | Feb 15, 1983 | Feb 15, 1983 | — | 4,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-8703 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 440 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,318 | 4,324 | Perforated |
| 4,327 | 4,329 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 544 | 12.25 | 240 sx |
| 4.5 | 4,448 | 10.75 | 1,000 sx |
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 16, 1984 | Mar 15, 1984 | — |
| 00 | Jul 13, 1984 | Mar 15, 1984 | — |
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 42-493-31210 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-493-31210 → 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/49331210, documented in the API reference.