TEXAS · WELLS · MARTIN COUNTY · UNIVERSITY 7-31B LEASE · API 42-317-35377 · DISTRICT 7B
University 7-31B #2
Martin County · Spraberry (Trend Area) field · Vertical
- Fields on the latest permit · any of 6
- Hutex (Dean) · Lacaff (Dean) · Lacaff (Devonian) · Lacaff (Ellenburger) · Lacaff (Spraberry) · Spraberry (Trend Area)
- Not one formation; the well must be completed in one of them, and no target formation is stated. The district's wildcat field is also on the permit.
University 7-31b #2 (API 42-317-35377) is a plugged well in Martin County, plugged August 25, 2023, last operated by Diamondback E&P LLC.
The RRC has issued one drilling permit (amended once), issued August 6, 2008, permitted to 18,000 ft.
It was permitted by Chesapeake Operating, Inc. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Clear Fork, Spraberry, Dean, Wolfcamp.
Its lease has reported 165K barrels of oil and 654K mcf of gas since January 2009, with no volume in the three years through April 2026. The lease carries 7 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
- 5,254
- 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 Nov 2018 |
| Latest permit | Chesapeake Operating, Inc.Aug 6, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 18,000
- total depth, ft
- 2
- permits on file
- Aug 6, 2008
- last permit issued
- Apr 17, 2015
- completed
- 165K
- cumulative oil, bbl
- 654K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2009 THROUGH Nov 2018
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 17, 2015
- Shut in
- —
- Plugged
- Aug 25, 2023
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 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| University 7-31B O-10-39191 | Spraberry (Trend Area) | Diamondback E&P LLC | 7 | 165K | 654K | Jan 2009 – Nov 2018 |
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.
- 1Chesapeake Operating, Inc.Jan 2009 → Aug 2012
- 2Enervest Operating, L.L.C.Sep 2012 → Feb 2014
- 3QEP Energy CompanyMar 2014 → Nov 2018
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 667013-98 | Drill | Chesapeake Operating, Inc. | Jan 28, 2009 | Aug 6, 2008 | Nov 2, 2008 | 18,000 |
| 667013-99 | Drill | Chesapeake Operating, Inc. | Jul 17, 2008 | Aug 6, 2008 | Nov 2, 2008 | 18,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 17, 2015 | University 7-31B O-10-39191 | Spraberry (Trend Area) | Diamondback E&P LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,934 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,250 | 10,051 | Perforated |
| 8,383 | 8,689 | Perforated |
| 9,052 | 9,745 | Perforated |
| 9,812 | 9,952 | Perforated |
| 10,007 | 10,051 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,825 | 11 | 700 S |
| 5.5 | 10,250 | 7.875 | 510 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 | Nov 10, 2015 | Sep 9, 2015 | — |
| 00 | Apr 30, 2009 | Feb 25, 2009 | Yes |
| 00 | Apr 3, 2009 | — | — |
Well logs
2 logs loaded from the RRC's log index, the latest received Dec 21, 2011. 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 |
|---|---|---|---|---|
| RESISTIVITYSpans Clear Fork, Spraberry, Dean, Wolfcamp | TIFF | 6,600 to 10,227 | Dec 21, 2011run Nov 16, 2008 | 3.10 |
| NEUTRON/DENSITY POROSITYSpans Clear Fork, Spraberry, Dean, Wolfcamp | TIFF | 200 to 10,251 | Dec 20, 2011run Nov 16, 2008 | 3.63 |
"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 42-317-35377 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-35377 → 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/31735377, documented in the API reference.