TEXAS · WELLS · PECOS COUNTY · TYRRELL, W. C., UNIT NO. 1 LEASE · API 42-371-36923 · DISTRICT 7B
Tyrrell W. C. Unit No. 1 #4
Pecos County · Gomez NW. (Wolfcamp) field · Producing · Vertical
Tyrrell W. C. Unit NO. 1 #4 (API 42-371-36923) is a well in Pecos County operated by Chevron Midcontinent L.P., completed November 1, 1999 and listed as producing on the RRC schedule, shut in March 1, 2026.
The RRC has issued one drilling permit, issued July 12, 1999, permitted to 11,741 ft.
It was permitted by Union Oil Company Of California and has since transferred to Chevron Midcontinent L.P. on the wellbore schedule.
Completion filings report 5 formation tops, including Wolfcamp, Rustler, Capitan, Lwr Cherry Canyon.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Union Oil Company of California; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 26, 2026
- Permits on file
- 173
- Phone
- (866) 212-1212
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Chevron Midcontinent L.P. |
| Production reports | Chevron Midcontinent, L.P.through Feb 2026 |
| Latest permit | Union Oil Company of CaliforniaJul 12, 1999 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,741
- total depth, ft
- 1
- permits on file
- Jul 12, 1999
- last permit issued
- Nov 1, 1999
- completed
- 0
- cumulative oil, bbl
- 1.25M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 1999 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 1, 1999
- Shut in
- Mar 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 lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Tyrrell, W. C., Unit No. 1 G-10-176845 | Gomez, NW. (Wolfcamp) | Chevron Midcontinent, L.P. | 1 | 0 | 1.25M | Oct 1999 – Jul 2026 |
Gas, mcf lease total
Last 12 months 16,170 · prior 12 21,384(-24%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Union Oil Company of CaliforniaOct 1999 → May 2000
- 2Pure Resources, L.P.Jun 2000 → Mar 2006
- 3Chevron Midcontinent, L.P.Apr 2006 → Feb 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 485712-99 | Drill | Union Oil Company of California | Jul 8, 1999 | Jul 12, 1999 | Aug 6, 1999 | 12,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 1, 1999 | Tyrrell W. C. Unit No. 1 G-10-176845 | Gomez NW. (Wolfcamp) | Chevron Midcontinent L.P. | Producing · shut in Mar 1, 2026 | 11,741 |
Formation tops
As filed on W-2/G-1. Subsea from 2,797 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Wolfcamp | 97 | 2,700 |
| Rustler | 1,718 | 1,079 |
| Capitan | 3,551 | -754 |
| LWR Cherry Canyon | 5,715 | -2,918 |
| Bone SpringBONE SPRINGS | 7,197 | -4,400 |
| Wolfcamp | 9,418 | -6,621 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,169 | 11,512 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 7.625 | 415 | 9.625 | 415 S |
| 9.625 | 2,095 | 12.25 | 1,045 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 | May 25, 2000 | Feb 15, 2000 | Yes |
| 00 | May 15, 2000 | — | — |
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 42-371-36923 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-371-36923 → 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/37136923, documented in the API reference.