TEXAS · WELLS · YOAKUM COUNTY · API 42-501-34954 · DISTRICT 7B
Cornell Unit #6399GC
Yoakum County · Wasson field · Injection · Vertical
Cornell Unit #6399GC (API 42-501-34954) is a well in Yoakum County operated by Hilcorp Energy Company, completed April 3, 2015 and listed as injection on the RRC schedule.
The RRC has issued 2 drilling permits (amended once) between 2004 and 2014, permitted to 5,317 ft.
It was permitted by Xto Energy Inc. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 7 formation tops, including Rustler, Yates, Queen, Grayburg.
Its 2 leases have reported 20.3M barrels of oil and 35.4M mcf of gas since January 1993, last reporting volume in April 2026. The leases carry 269 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 6.56K barrels injected in the 12 months reported through September 2025.
Operator of record
Permitted by XTO Energy Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,458
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | XTO Energy Inc.Oct 27, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,317
- total depth, ft
- 3
- permits on file
- Oct 27, 2014
- last permit issued
- Apr 3, 2015
- completed
- 20.3M
- cumulative oil, bbl
- 35.4M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 3, 2015
- 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 269 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cornell Unit O-11-19453 | Wasson | Hilcorp Energy Company | 268 | 20.3M | 35.4M | Jan 1993 – Apr 2026 |
| Cornell Unit G-11-203861 | Wasson | XTO Energy Inc. | 1 | 0 | 0 | Jul 2004 – — |
Oil, barrels lease total
Last 12 months 486,391 · prior 12 408,638(+19%)
Gas, mcf lease total
Last 12 months 594,808 · prior 12 645,030(-8%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Exxon Corp.Jan 1993 → Mar 2000
- 2Exxon Mobil CorporationApr 2000 → Jul 2000
- 3Cross Timbers Operating CompanyAug 2000 → May 2001
- 4XTO Energy Inc.Jun 2001 → Mar 2025
- 5Hilcorp Energy CompanyApr 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 797733-99 | Recompletion | XTO Energy Inc. | Oct 3, 2014 | Oct 27, 2014 | Mar 4, 2015 | 5,600 |
| 542175-98 | Drill | XTO Energy Inc. | Apr 27, 2007 | Feb 18, 2004 | May 12, 2004 | 5,400 |
| 542175-99 | Drill | XTO Energy Inc. | Feb 18, 2004 | Feb 18, 2004 | May 12, 2004 | 5,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 3, 2015 | Cornell Unit O-11-19453 | Wasson | Hilcorp Energy Company | Injection | 5,317 |
| Jul 9, 2004 | Cornell Unit G-11-203861 | Wasson | XTO Energy Inc. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,603 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rustler | 2,154 | 1,449 |
| Yates | 2,897 | 706 |
| Queen | 3,659 | -56 |
| Grayburg | 4,325 | -722 |
| San Andres | 4,581 | -978 |
| San AndresTOP OF SAN ANDRES | 4,581 | -978 |
| F1 Gas Cap | 4,679 | -1,076 |
| FL Gas Cap | 4,679 | -1,076 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,686 | 4,774 | Perforated |
| 4,906 | 5,257 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,185 | 12.25 | 800 S |
| 7 | 4,782 | 8.75 | 850 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 | Jun 8, 2015 | Jun 5, 2015 | — |
| 00 | Jan 4, 2005 | Aug 4, 2004 | Yes |
| 00 | Oct 25, 2004 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Nov 8, 2007. Density, Gamma ray, Neutron. 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 PorosityTHREE DETECTOR LITHO-DENSITY COMP. NEUTRON GAMMA RAYSpans Rustler, Yates, Queen, Grayburg, San Andres, Fl Gas Cap, F1 Gas Cap | TIFF | 2,189 to 4,786 | Nov 8, 2007run May 19, 2004 | — |
"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 42-501-34954 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-501-34954 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 6.56K
- bbl, last 12 reported months
- 1.63M
- bbl, all reported
- Sep 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000110906 | H-1 Injection | Active | 2,000 | 2,150 | 4,300–5,500 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 6,556 · prior 12 28,516(-77%)
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/50134954, documented in the API reference.