WELL · 42-479-35212 · DISTRICT 4
Hirsch Estate 1770 B #1
Webb County · Big Cowboy (Lobo) field · Temp Abandoned · Vertical
Hirsch Estate 1770 B #1 (API 42-479-35212) is a well in Webb County operated by Hilcorp Energy Company, completed May 18, 1991 and listed as temp abandoned on the RRC schedule, shut in January 1, 2009.
The RRC has issued one drilling permit, issued April 9, 1991, permitted to 8,350 ft.
It was permitted by Enron Oil & Gas Company and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Queen City, Wilcox, Lobo.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Enron Oil & Gas Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,454
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Conocophillips Companythrough Dec 2008 |
| Latest permit | Enron Oil & Gas CompanyApr 9, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,350
- total depth, ft
- 1
- permits on file
- Apr 9, 1991
- last permit issued
- May 18, 1991
- completed
- 0
- cumulative oil, bbl
- 626K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 18, 1991
- Shut in
- Jan 1, 2009
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 |
|---|---|---|---|---|---|---|
| Hirsch Estate 1770 B G-4-138764 | Big Cowboy (Lobo) | Hilcorp Energy Company | 1 | 0 | 626K | Jan 1993 – Jul 2026 |
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.
- 1Enron Oil & Gas CompanyJan 1993 → May 1995
- 2Conoco Inc.Jun 1995 → Dec 2002
- 3Conocophillips CompanyJan 2003 → Dec 2008
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 386441-99 | Drill | Enron Oil & Gas Company | Apr 5, 1991 | Apr 9, 1991 | Apr 30, 1991 | 9,350 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 18, 1991 | Hirsch Estate 1770 B G-4-138764 | Big Cowboy (Lobo) | Hilcorp Energy Company | Temp Abandoned · shut in Jan 1, 2009 | 8,350 |
Formation tops
As filed on W-2/G-1. Subsea from 538 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 2,450 | -1,912 |
| Wilcox | 4,502 | -3,964 |
| Lobo | 7,334 | -6,796 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,337 | 7,412 | Perforated |
| 7,886 | 7,926 | Perforated |
| 7,886 | 8,016 | Perforated |
| 7,961 | 8,016 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,010 | 12.25 | 402 S |
| 7 | 6,956 | 8.75 | 370 S |
| 2.875 | 8,323 | 6.25 | 300 S |
| 7 | — | — | 343 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 | Oct 8, 1992 | Oct 5, 1992 | — |
| 00 | Aug 2, 1991 | Jun 17, 1991 | Yes |
| 00 | Jul 31, 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 42-479-35212 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-479-35212 → 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/47935212, documented in the API reference.