TEXAS · WELLS · REAGAN COUNTY · UNIVERSITY 18-58 LEASE · API 42-383-38352 · DISTRICT 6E
University 18-58 #1
Reagan County · Spraberry (Trend Area) field · Producing · Vertical
University 18-58 #1 (API 42-383-38352) is a well in Reagan County operated by Sem Operating Company LLC, completed November 7, 2013 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued June 21, 2013, permitted to 11,741 ft.
It was permitted by Callon Petroleum Operating CO and has since transferred to Sem Operating Company LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Spraberry, Dean, Wolfcamp, Strawn.
Its lease has reported 81.1K barrels of oil and 196K mcf of gas since November 2013, last reporting volume in April 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Callon Petroleum Operating Co; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jun 23, 2026
- Permits on file
- 404
- Phone
- (713) 395-3000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sem Operating Company LLC |
| Production reports | Sem Operating Company LLCthrough Apr 2026 |
| Latest permit | Callon Petroleum Operating CoJun 21, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,741
- total depth, ft
- 1
- permits on file
- Jun 21, 2013
- last permit issued
- Nov 7, 2013
- completed
- 81.1K
- cumulative oil, bbl
- 196K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2013 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 7, 2013
- 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; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| University 18-58 O-9-18381 | Spraberry (Trend Area) | Sem Operating Company LLC | 2 | 81.1K | 196K | Nov 2013 – Apr 2026 |
Gas, mcf lease total
Last 12 months 14,020 · prior 12 35,664(-61%)
Oil, barrels lease total
Last 12 months 4,805 · prior 12 3,463(+39%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Callon Petroleum Operating CoNov 2013 → May 2019
- 2Sem Operating Company LLCJun 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 764862-99 | Drill | Callon Petroleum Operating Co | Jun 18, 2013 | Jun 21, 2013 | Aug 12, 2013 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 7, 2013 | University 18-58 O-9-18381 | Spraberry (Trend Area) | Sem Operating Company LLC | Producing | 11,741 |
Formation tops
As filed on W-2/G-1. Subsea from 2,639 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,489 | 10,104 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 550 | 17.5 | 435 S |
| 8.625 | 4,510 | 12.25 | 1,740 S |
| 5.5 | 11,741 | 7.875 | 960 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 | Apr 29, 2014 | Dec 11, 2013 | Yes |
Well logs
3 logs loaded from the RRC's log index, the latest received Aug 30, 2016. 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 Spraberry, Dean, Wolfcamp, Strawn | TIFF | 4,470 to 10,388 | Aug 26, 2014run Mar 6, 2014 | 8.51 |
| RESISTIVITYSpans Spraberry, Dean, Wolfcamp, Strawn | TIFF | 4,470 to 10,388 | Aug 26, 2014run Mar 6, 2014 | 5.20 |
| NEUTRON/DENSITY POROSITYSpans Spraberry, Dean, Wolfcamp, Strawn | TIFF | 200 to 11,754 | Aug 30, 2016run Aug 26, 2013 | 4.22 |
"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 42-383-38352 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-383-38352 → 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/38338352, documented in the API reference.