WELL · 42-505-33275 · DISTRICT 4
Hein A.O. #4
Zapata County · LA Perla (Lobo Cons.) field · Producing · Vertical
Hein A.O. #4 (API 42-505-33275) is a well in Zapata County operated by Arete Operating Company II LLC, completed February 23, 1995 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued December 12, 1994, permitted to 11,300 ft.
It was permitted by Enron Oil & Gas Company and has since transferred to Arete Operating Company II LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Wilcox, Lobo.
No lease production has been reported under this well’s leases.
Operator of record
Arete Operating Company II LLC
Permitted by Enron Oil & Gas Company; the EWA schedule now lists a different operator.
San Antonio, TX · P-5 Y, filed Sep 4, 2025 · (210) 325-9383
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Arete Operating Company II LLC |
| Production reports | Arete Operating Company II, LLCthrough Apr 2026 |
| Latest permit | Enron Oil & Gas CompanyDec 12, 1994 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,300
- total depth, ft
- 1
- permits on file
- Dec 12, 1994
- last permit issued
- Feb 23, 1995
- completed
- 0
- cumulative oil, bbl
- 3.73M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 1995 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 23, 1995
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Hein, A.O. G-4-153183 | LA Perla (Wilcox, Lower) | Arete Operating Company II, LLC | 1 | 0 | 3.73M | Feb 1995 – Jul 2026 |
Gas, mcf lease total
Last 12 months 23,538 · prior 12 26,420(-11%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Enron Oil & Gas CompanyFeb 1995 → Mar 1998
- 2Michael Petroleum CorporationApr 1998 → Dec 2001
- 3Calpine Natural Gas CompanyJan 2002 → Apr 2002
- 4Calpine Natural Gas Company L.P.May 2002 → Jul 2002
- 5Calpine Natural Gas L.P.Aug 2002 → Dec 2005
- 6Rosetta Resources Operating LPJan 2006 → Mar 2012
- 7Pinpoint Energy Operating, LLCApr 2012 → Aug 2012
- 8Petropoint Energy Operating, LLCSep 2012 → Jul 2014
- 9White Oak Operating Company LLCAug 2014 → Jul 2020
- 10Arete Operating Company, LLCAug 2020 → Jun 2025
- 11Arete Operating Company II, LLCJul 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 430860-99 | Drill | Enron Oil & Gas Company | Dec 12, 1994 | Dec 12, 1994 | Dec 17, 1994 | 11,300 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-153183 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 405 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,840 | 8,912 | Perforated |
| 9,104 | 9,114 | Perforated |
| 9,400 | 9,411 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,023 | 12.25 | 385 S |
| 7 | 6,726 | 8.75 | 365 S |
| 2.875 | 9,577 | 6.25 | 520 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 | Mar 30, 1995 | Mar 1, 1995 | Yes |
| 00 | Mar 10, 1995 | — | — |
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 42-505-33275 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-33275 → 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/50533275, documented in the API reference.