TEXAS · WELLS · REAGAN COUNTY · LITTLE LEASE · API 42-383-35878 · DISTRICT 6E
Little #4TM
Reagan County · Spraberry (Trend Area) field · Producing · Vertical
Little #4TM (API 42-383-35878) is a well in Reagan County operated by Pioneer Natural Res. USA Inc., completed January 13, 2007 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued November 28, 2006, permitted to 8,171 ft.
It was permitted by Mariner Energy, Inc. and has since transferred to Pioneer Natural Res. USA Inc. on the wellbore schedule.
Completion filings report 2 formation tops, including Spraberry, Dean.
Its lease has reported 106K barrels of oil and 885K mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Mariner Energy, Inc.; the EWA schedule now lists a different operator.
- Based in
- Spring, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jul 8, 2026
- Permits on file
- 15,633
- Phone
- (972) 444-4001
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Pioneer Natural Res. USA Inc. |
| Production reports | Pioneer Natural Res. USA, Inc.through Apr 2026 |
| Latest permit | Mariner Energy, Inc.Nov 28, 2006 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,171
- total depth, ft
- 1
- permits on file
- Nov 28, 2006
- last permit issued
- Jan 13, 2007
- completed
- 106K
- cumulative oil, bbl
- 885K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 13, 2007
- 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 lease this well is completed on; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Little O-9-6242 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 4 | 106K | 885K | Jan 1993 – Apr 2026 |
Gas, mcf lease total
Last 12 months 9,264 · prior 12 12,449(-26%)
Oil, barrels lease total
Last 12 months 956 · prior 12 1,030(-7%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Tamarack Petroleum Company, Inc.Jan 1993 → Nov 2007
- 2Mariner Energy, Inc.Dec 2007 → Nov 2010
- 3Apache CorporationDec 2010 → Feb 2017
- 4Parsley Energy Operations, LLCMar 2017 → Jan 2021
- 5Pioneer Natural Res. USA, Inc.Feb 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 629055-99 | Drill | Mariner Energy, Inc. | Nov 15, 2006 | Nov 28, 2006 | Dec 11, 2006 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 13, 2007 | Little O-9-6242 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Producing | 8,171 |
Formation tops
As filed on W-2/G-1. Subsea from 2,681 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,237 | 6,579 | Perforated |
| 6,846 | 7,282 | Perforated |
| 7,707 | 7,879 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 451 | 11 | 300 S |
| 4.5 | 8,170 | 7.875 | 1,210 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 | May 3, 2007 | Feb 8, 2007 | Yes |
| 00 | Feb 20, 2007 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Dec 29, 2009. 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 Spraberry, Dean | TIFF | 5,000 to 8,136 | Dec 29, 2009run Dec 28, 2006 | 4.19 |
"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 42-383-35878 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-383-35878 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search 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/38335878, documented in the API reference.