TEXAS · WELLS · UPTON COUNTY · UL DARBY D LEASE · API 42-461-42365 · DISTRICT 6E
UL Darby D #4H
Upton County · Spraberry (Trend Area) field · Producing · Horizontal
UL Darby D #4H (API 42-461-42365) is a horizontal well in Upton County operated by Civitas Permian Operating LLC, completed September 15, 2023 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued January 5, 2023, permitted to 8,607 ft.
It was permitted by Hibernia Resources Iii, LLC and has since transferred to Civitas Permian Operating LLC on the wellbore schedule.
Completion filings report 9 formation tops, including Yates, Grayburg, San Andres, Spraberry.
Its lease has reported 340K barrels of oil and 1.11M mcf of gas since April 2023, last reporting volume in March 2026.
Operator of record
Permitted by Hibernia Resources III, LLC; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 21, 2025
- Permits on file
- 487
- Phone
- (303) 861-8140
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Civitas Permian Operating LLC |
| Production reports | Civitas Permian Operating, LLCthrough Mar 2026 |
| Latest permit | Hibernia Resources III, LLCJan 5, 2023 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,607
- total depth, ft
- 1
- permits on file
- Jan 5, 2023
- last permit issued
- Sep 15, 2023
- completed
- 340K
- cumulative oil, bbl
- 1.11M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2023 THROUGH Mar 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 15, 2023
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
31.303286, -101.779714 NAD27, as filed
31.303434, -101.780117 WGS84
Permit surface location from the RRC GIS record, referenced to NAD27 as the RRC files it; the WGS84 pair is the same point through NOAA's NADCON grid, and the map link uses it, in Upton County.
Wells nearby
Every well with a location on file around this one, in any state, nearest first.
Loading the wells nearby…
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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 |
|---|---|---|---|---|---|---|
| UL Darby D O-9-22064 | Spraberry (Trend Area) | Civitas Permian Operating, LLC | 1 | 340K | 1.11M | Apr 2023 – Mar 2026 |
Oil, barrels lease total
Last 12 months 52,931 · prior 12 113,425(-53%)
Gas, mcf lease total
Last 12 months 367,783 · prior 12 408,189(-10%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hibernia Resources III, LLCSep 2023 → Nov 2023
- 2Civitas Permian Operating, LLCDec 2023 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 886731-99 | Drill | Hibernia Resources III, LLC | Dec 20, 2022 | Jan 5, 2023 | Feb 24, 2023 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 15, 2023 | UL Darby D O-9-22064 | Spraberry (Trend Area) | Civitas Permian Operating LLC | Producing | 8,607 |
Formation tops
As filed on W-2/G-1. Subsea from 2,649 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 666 | 1,983 |
| Grayburg | 3,353 | -704 |
| San AndresSAN ANDRES - SALTWATER FLOW | 3,694 | -1,045 |
| Spraberry | 6,559 | -3,910 |
| Wolfcamp | 8,115 | -5,466 |
| Devonian | — | — |
| Ellenburger | — | — |
| Fusselman | — | — |
| Strawn | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,853 | 23,430 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 585 | 17.5 | 815 S |
| 9.625 | 8,070 | 12.25 | 1,810 S |
| 5.5 | 23,571 | 8.5 | 3,655 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 | Feb 9, 2024 | Jan 10, 2024 | Yes |
| 00 | May 23, 2023 | May 12, 2023 | Yes |
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 42-461-42365 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-42365 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbors, subsea-aligned so they line up regardless of surface terrain.
UL Darby C42-461-42364
0.0 KM · Hibernia Resources III, LLC · Section with this well →
| Yates | 694 | 1,955 |
| Grayburg | 3,367 | -718 |
| San Andres | 3,708 | -1,059 |
| Spraberry | 6,564 | -3,915 |
| Wolfcamp | 8,102 | -5,453 |
| Fusselman | — | |
| Devonian | — | |
| Ellenburger | — |
9 TOPS · FIRST 8
UL Darby B42-461-42363
0.0 KM · Hibernia Resources III, LLC · Section with this well →
| Yates | 712 | 1,937 |
| Grayburg | 3,371 | -722 |
| San Andres | 3,706 | -1,057 |
| Spraberry | 6,559 | -3,910 |
| Wolfcamp | — | |
| Devonian | — | |
| Ellenburger | — | |
| Fusselman | — |
9 TOPS · FIRST 8
UL Darby A42-461-42362
0.0 KM · Hibernia Resources III, LLC · Section with this well →
| Yates | 2,141 | 508 |
| Grayburg | 3,378 | -729 |
| San Andres | 3,712 | -1,063 |
| Spraberry | 6,577 | -3,928 |
| Wolfcamp | 8,120 | -5,471 |
| Ellenburger | — | |
| Strawn | — | |
| Fusselman | — |
9 TOPS · FIRST 8
UL Darby E42-383-41280
0.6 KM · Hibernia Resources III, LLC · Section with this well →
| Grayburg | 686 | 1,961 |
| Queen | 2,942 | -295 |
| San Andres | 3,702 | -1,055 |
| Clear Fork | 5,819 | -3,172 |
| Spraberry | 6,582 | -3,935 |
| Ellenburger | — | |
| Strawn | — | |
| Fusselman | — |
UL Darby F42-383-41281
0.6 KM · Hibernia Resources III, LLC · Section with this well →
| Grayburg | 679 | 1,968 |
| Queen | 2,959 | -312 |
| San Andres | 3,708 | -1,061 |
| Clear Fork | 5,806 | -3,159 |
| Spraberry | 6,571 | -3,924 |
| Fusselman | — | |
| Strawn | — | |
| Ellenburger | — |
UL Darby G42-383-41282
0.6 KM · Hibernia Resources III, LLC · Section with this well →
| Queen | 2,952 | -305 |
| Grayburg | 3,378 | -731 |
| San Andres | 3,712 | -1,065 |
| Clear Fork | 5,819 | -3,172 |
| Spraberry | 6,577 | -3,930 |
| Wolfcamp | 8,120 | -5,473 |
| Strawn | — | |
| Ellenburger | — |
9 TOPS · FIRST 8
UL Darby H42-383-41283
0.6 KM · Hibernia Resources III, LLC · Section with this well →
| Queen | 2,949 | -302 |
| Grayburg | 3,373 | -726 |
| San Andres | 3,720 | -1,073 |
| Clear Fork | 5,811 | -3,164 |
| Spraberry | 6,574 | -3,927 |
| Wolfcamp | 8,115 | -5,468 |
| Fusselman | — | |
| Strawn | — |
9 TOPS · FIRST 8
Benedum 3 East E42-461-42275
1.8 KM · Earthstone Operating, LLC · Section with this well →
| Yates | 2,082 | 533 |
| Grayburg | 3,500 | -885 |
| San Andres | 3,708 | -1,093 |
| Spraberry | 6,502 | -3,887 |
| Wolfcamp | 8,053 | -5,438 |
| Fusselman | — | |
| Ellenburger | — | |
| Devonian | — |
9 TOPS · FIRST 8
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/46142365, documented in the API reference.