TEXAS · WELLS · YOAKUM COUNTY · API 42-501-35110 · DISTRICT 7B
Cornell Unit #310GC
Yoakum County · Wasson field · Injection · Vertical
Cornell Unit #310GC (API 42-501-35110) is a well in Yoakum County operated by Hilcorp Energy Company, completed April 13, 2015 and listed as injection on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued February 14, 2005, permitted to 5,400 ft.
It was permitted by Xto Energy Inc. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 4 formation tops, including Yates, Queen, Grayburg, San Andres.
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 2.69K 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
- 3,454
- 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.Feb 14, 2005 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,400
- total depth, ft
- 2
- permits on file
- Feb 14, 2005
- last permit issued
- Apr 13, 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 13, 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-11-255796 | Wasson | XTO Energy Inc. | 1 | 0 | 0 | May 2008 – — |
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 |
|---|---|---|---|---|---|---|
| 556428-98 | Drill | XTO Energy Inc. | May 2, 2007 | Feb 14, 2005 | Jul 3, 2005 | 5,400 |
| 556428-99 | Drill | XTO Energy Inc. | Jan 19, 2005 | Feb 14, 2005 | Jul 3, 2005 | 5,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 13, 2015 | Cornell Unit O-11-19453 | Wasson | Hilcorp Energy Company | Injection | 5,400 |
| Jan 3, 2006 | Cornell Unit G-11-255796 | Wasson | XTO Energy Inc. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,596 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,920 | 676 |
| Queen | 3,686 | -90 |
| Grayburg | 4,346 | -750 |
| San Andres | 4,613 | -1,017 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,708 | 4,824 | Perforated |
| 4,933 | 5,188 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 2,200 | 11 | 700 S |
| 5.5 | 5,392 | 7.875 | 1,000 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 | Jul 9, 2015 | Jul 8, 2015 | — |
| 00 | Nov 19, 2010 | Oct 14, 2010 | — |
| 00 | Jun 16, 2010 | Jan 27, 2010 | Yes |
| 00 | May 24, 2010 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Jun 28, 2010. Density, 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 POROSITYSpans Yates, Queen, Grayburg, San Andres | TIFF | 100 to 5,374 | Jun 28, 2010run Jul 10, 2005 | 1.35 |
"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 42-501-35110 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-501-35110 → 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
- 2.69K
- bbl, last 12 reported months
- 1.15M
- bbl, all reported
- Sep 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000112150 | H-1 Injection | Active | 2,000 | 2,150 | 4,300–5,400 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 2,691 · prior 12 122,715(-98%)
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/50135110, documented in the API reference.