TEXAS · WELLS · CROCKETT COUNTY · UNIVERSITY 42 LEASE · API 42-105-40657 · DISTRICT 6E
University 42 #4
Crockett County · Holt Ranch (Consolidated) field · Producing · Vertical
University 42 #4 (API 42-105-40657) is a well in Crockett County operated by Zarvona Energy LLC, completed June 4, 2008 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 8, 2008, permitted to 8,500 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 lease has reported 37.2K barrels of oil and 1.94M mcf of gas since June 2008, last reporting volume in March 2026.
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 LLCMay 8, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,500
- total depth, ft
- 1
- permits on file
- May 8, 2008
- last permit issued
- Jun 4, 2008
- completed
- 37.2K
- cumulative oil, bbl
- 1.94M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2008 THROUGH Mar 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 4, 2008
- Shut in
- —
- 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 |
|---|---|---|---|---|---|---|
| University 42 G-9-243914 | Holt Ranch (Consolidated) | Zarvona Energy LLC | 1 | 37.2K | 1.94M | Jun 2008 – Mar 2026 |
Gas, mcf lease total
Last 12 months 60,006 · prior 12 74,948(-20%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Approach Operating LLCJun 2008 → Sep 2020
- 2Zarvona Energy LLCOct 2020 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 660403-99 | Drill | Approach Operating LLC | Apr 24, 2008 | May 8, 2008 | May 17, 2008 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 4, 2008 | University 42 G-9-243914 | Holt Ranch (Consolidated) | Zarvona Energy LLC | Producing | 8,500 |
Formation tops
As filed on W-2/G-1. Subsea from 2,597 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE OF CRETACEOUS | 725 | 1,872 |
| DeanTOP OF DEAN SAND MKR | 5,474 | -2,877 |
| DeanTOP OF DEAN SAND MKR. | 5,474 | -2,877 |
| CanyonTOP OF CANYON MKR | 7,618 | -5,021 |
| CanyonTOP OF CANYON MKR. | 7,618 | -5,021 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,072 | 8,158 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 2,125 | 12.25 | 970 S |
| 5.5 | 8,456 | 7.875 | 580 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 | Mar 20, 2014 | Mar 5, 2014 | — |
| 00 | Jan 28, 2009 | Oct 10, 2008 | Yes |
| 00 | Jan 14, 2009 | — | — |
Well logs
2 logs loaded from the RRC's log index, the latest received Apr 18, 2012. Density, Neutron, 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 |
|---|---|---|---|---|
| NEUTRON/DENSITY POROSITYSpans Base Cretaceous (marker), Dean, Canyon | TIFF | 200 to 8,445 | Apr 18, 2012run May 26, 2008 | 6.87 |
| RESISTIVITYSpans Base Cretaceous (marker), Dean, Canyon | TIFF | 2,116 to 8,438 | Apr 3, 2012run May 26, 2008 | 3.40 |
"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 42-105-40657 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-105-40657 → 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/10540657, documented in the API reference.