TEXAS · WELLS · MARTIN COUNTY · API 42-317-35351 · DISTRICT 7B
University 7-28 #4
Martin County · Spraberry (Trend Area) field · Producing · Vertical
University 7-28 #4 (API 42-317-35351) is a well in Martin County operated by Diamondback E&P LLC, completed April 21, 2009 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 16, 2008, permitted to 10,200 ft.
It was permitted by Chesapeake Operating, Inc. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Cleafork, Spraberry, Wolfcamp.
Its 2 leases have reported 614K barrels of oil and 1.66M mcf of gas since September 2007, last reporting in July 2026. The leases carry 14 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Chesapeake Operating, Inc.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,243
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Chesapeake Operating, Inc.Jul 16, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,200
- total depth, ft
- 1
- permits on file
- Jul 16, 2008
- last permit issued
- Apr 21, 2009
- completed
- 614K
- cumulative oil, bbl
- 1.66M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2007 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 21, 2009
- 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 2 leases this well is completed on; they carry 14 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| University 7-28 O-10-38408 | Spraberry (Trend Area) | Diamondback E&P LLC | 7 | 323K | 902K | Sep 2007 – Jul 2026 |
| University 7-28 B O-10-39022 | Spraberry (Trend Area) | Diamondback E&P LLC | 7 | 291K | 759K | Sep 2008 – Jul 2026 |
Oil, barrels lease total
Last 12 months 11,316 · prior 12 13,637(-17%)
Gas, mcf lease total
Last 12 months 35,046 · prior 12 37,245(-6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Chesapeake Operating, Inc.Sep 2007 → Aug 2012
- 2Enervest Operating, L.L.C.Sep 2012 → Feb 2014
- 3QEP Energy CompanyMar 2014 → Sep 2021
- 4Diamondback E&P LLCOct 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 665330-99 | Drill | Chesapeake Operating, Inc. | Jun 25, 2008 | Jul 16, 2008 | Nov 20, 2008 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 21, 2009 | University 7-28 O-10-38408 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,200 |
| Apr 21, 2009 | University 7-28 B O-10-39022 | Spraberry (Trend Area) | Diamondback E&P LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,910 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,952 | 8,151 | Perforated |
| 8,303 | 8,824 | Perforated |
| 8,932 | 9,571 | Perforated |
| 9,852 | 10,095 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,802 | 11 | 700 S |
| 5.5 | 10,200 | 7.875 | 500 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 | Apr 10, 2015 | May 13, 2009 | Yes |
| 00 | Nov 2, 2009 | May 13, 2009 | Yes |
| 00 | Sep 25, 2009 | — | — |
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 42-317-35351 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-35351 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/31735351, documented in the API reference.