TEXAS · WELLS · CRANE COUNTY · API 42-103-31459 · DISTRICT 7B
Block 31 Unit #C-4U&L
Crane County · Block 31 (Devonian) field · Producing · Vertical
Block 31 Unit #C-4U&L (API 42-103-31459) is a well in Crane County operated by Hilcorp Energy Company, completed May 26, 1977 and listed as producing on the RRC schedule, shut in August 1, 2026.
The RRC has issued one drilling permit, issued June 13, 1977, permitted to 9,000 ft.
It was permitted by Atlantic Richfield CO. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Woodford, Barnett, Devonian.
Its 3 leases have reported 15.2M barrels of oil and 972M mcf of gas since January 1993, last reporting volume in April 2026. The leases carry 339 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Atlantic Richfield Co.; 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 | OXY USA EOR, LLCthrough Apr 2026 |
| Latest permit | Atlantic Richfield Co.Jun 13, 1977 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,000
- total depth, ft
- 1
- permits on file
- Jun 13, 1977
- last permit issued
- May 26, 1977
- completed
- 15.2M
- cumulative oil, bbl
- 972M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 26, 1977
- Shut in
- Aug 1, 2026
- 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 3 leases this well is completed on; they carry 339 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Block 31 Unit G-10-279500 | Block 31 (Devonian) | Hilcorp Energy Company | 1 | 3.29K | 1.22M | Aug 2015 – Apr 2026 |
| Block 31 Unit O-10-442 | Block 31 (Devonian) | OXY USA EOR, LLC | 330 | 15.2M | 971M | Jan 1993 – Apr 2026 |
| Block 31 Unit O-10-21639 | Block 31, East (Atoka) | Hilcorp Energy Company | 8 | 10.2K | 96.9K | Jan 1993 – May 2006 |
Gas, mcf lease total
Last 12 months 4,372,470 · prior 12 5,416,888(-19%)
Oil, barrels lease total
Last 12 months 42,201 · prior 12 62,459(-32%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Arco Oil & Gas Co.Jan 1993 → May 1994
- 2Arco PermianJun 1994 → Dec 2001
- 3BP America Production CompanyJan 2002 → Oct 2010
- 4OXY USA Inc.Nov 2010 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 603-99 | Drill | Atlantic Richfield Co. | Jun 13, 1977 | Jun 13, 1977 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 26, 1977 | Block 31 Unit G-10-279500 | Block 31 (Devonian) | Hilcorp Energy Company | Producing · shut in Aug 1, 2026 | 9,000 |
| May 16, 1985 | Block 31 Unit O-10-21639 | Block 31 East (Atoka) | Hilcorp Energy Company | Not on Schedule | — |
| May 26, 1977 | Block 31 Unit O-10-442 | Block 31 (Devonian) | OXY USA EOR LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,557 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,500 | 7,508 | Perforated |
| 8,085 | 8,718 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 2,535 | 11 | 800 S |
| 8.625 | 2,535 | — | 800 S |
| 5.5 | 9,000 | 7.875 | 1,400 S |
| 5.5 | 9,000 | — | 1,500 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. 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 2, 2019 | Mar 4, 2019 | — |
| 00 | Mar 29, 2016 | Oct 21, 2015 | — |
| 00 | Jun 22, 1992 | Apr 2, 1992 | — |
| 00 | Jan 12, 1984 | Jun 10, 1977 | — |
| 00 | Jan 12, 1984 | Jun 8, 1977 | — |
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 42-103-31459 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-103-31459 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/10331459, documented in the API reference.