TEXAS · WELLS · CROCKETT COUNTY · API 42-105-40794 · DISTRICT 6E
University 42 #4
Crockett County · Holt Ranch (Consolidated) field · Temp Abandoned · Vertical
University 42 #4 (API 42-105-40794) is a well in Crockett County operated by Zarvona Energy LLC, completed October 18, 2008 and listed as temp abandoned on the RRC schedule, shut in July 1, 2021.
The RRC has issued one drilling permit, issued July 30, 2008, permitted to 9,000 ft.
It was permitted by Approach Operating LLC and has since transferred to Zarvona Energy LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Base Cretaceous (marker), Dean, Canyon.
Its 4 leases have reported 1.76M barrels of oil and 19.8M mcf of gas since November 2008, last reporting volume in March 2026. The leases carry 83 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Approach Operating LLC; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jun 2, 2026
- Permits on file
- 98
- Phone
- (713) 600-0600
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Zarvona Energy LLC |
| Production reports | Zarvona Energy LLCthrough Mar 2026 |
| Latest permit | Approach Operating LLCJul 30, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,000
- total depth, ft
- 1
- permits on file
- Jul 30, 2008
- last permit issued
- Oct 18, 2008
- completed
- 1.76M
- cumulative oil, bbl
- 19.8M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2008 THROUGH Mar 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 18, 2008
- Shut in
- Jul 1, 2021
- 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 4 leases this well is completed on; they carry 83 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| University 42 O-9-17265 | Holt Ranch (Consolidated) | Zarvona Energy LLC | 71 | 1.66M | 19M | Sep 2010 – Mar 2026 |
| University 42 G-9-289849 | Holt Ranch (Consolidated) | Zarvona Energy LLC | 1 | 0 | 995 | Feb 2020 – Jun 2021 |
| University 42-23 O-9-17258 | Holt Ranch (Consolidated) | Approach Operating LLC | 9 | 90.3K | 723K | May 2010 – Sep 2013 |
| University 42-23 O-9-16861 | Holt Ranch (Canyon 7600) | Approach Operating LLC | 2 | 12K | 78K | Nov 2008 – Aug 2010 |
Gas, mcf lease total
Last 12 months 969,056 · prior 12 1,146,637(-15%)
Oil, barrels lease total
Last 12 months 45,605 · prior 12 55,220(-17%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Approach Operating LLCNov 2008 → Sep 2020
- 2Zarvona Energy LLCOct 2020 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 666455-99 | Drill | Approach Operating LLC | Jul 10, 2008 | Jul 30, 2008 | Oct 3, 2008 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 18, 2008 | University 42 G-9-289849 | Holt Ranch (Consolidated) | Zarvona Energy LLC | Temp Abandoned · shut in Jul 1, 2021 | 9,000 |
| Nov 19, 2008 | University 42 O-9-17265 | Holt Ranch (Consolidated) | Zarvona Energy LLC | Not on Schedule | — |
| Nov 19, 2008 | University 42-23 O-9-17258 | Holt Ranch (Consolidated) | Approach Operating LLC | Not on Schedule | — |
| Nov 19, 2008 | University 42-23 O-9-16861 | Holt Ranch (Canyon 7600) | Approach Operating LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,603 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE OF CRETACEOUS | 840 | 1,763 |
| DeanTOP OF DEAN SAND MKR | 5,416 | -2,813 |
| CanyonTOP OF CANYON MKR | 7,606 | -5,003 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,713 | 7,824 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 2,141 | 12.25 | 720 S |
| 4.5 | 8,051 | 7.875 | 1,045 S |
| 4.5 | 8,054 | 7.875 | 855 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Sep 14, 2020 | Apr 8, 2020 | — |
| 00 | Jul 7, 2014 | Mar 13, 2009 | Yes |
| 00 | Nov 15, 2010 | Mar 13, 2009 | Yes |
| 00 | May 7, 2009 | Mar 13, 2009 | Yes |
| 00 | Mar 30, 2009 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Apr 18, 2012. Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| RESISTIVITYSpans Base Cretaceous (marker), Dean, Canyon | TIFF | 2,132 to 8,421 | Apr 18, 2012run Oct 16, 2008 | 6.74 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-105-40794 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-105-40794 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/10540794, documented in the API reference.