TEXAS · WELLS · HOWARD COUNTY · GUITAR "4" LEASE · API 42-227-36660 · DISTRICT 7B
Guitar 4 #1
Howard County · Spraberry (Trend Area) field · Shut In · Vertical
- Fields on the latest permit · any of 3
- Big Spring (Mississippian) · Moore (Strawn 9500) · Spraberry (Trend Area)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Guitar 4 #1 (API 42-227-36660) is a well in Howard County operated by Pioneer Natural Res. USA Inc., completed March 7, 2012 and listed as shut in on the RRC schedule, shut in July 1, 2023.
The RRC has issued one drilling permit, issued May 11, 2011, permitted to 10,104 ft.
It was permitted by Endeavor Energy Resources L.P. and has since transferred to Pioneer Natural Res. USA Inc. on the wellbore schedule.
Completion filings report 3 formation tops, including Spraberry, Strawn, Mississippian.
Its lease has reported 64.9K barrels of oil and 161K mcf of gas since October 2011, last reporting volume in June 2023. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Endeavor Energy Resources L.P.; 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 Jun 2023 |
| Latest permit | Endeavor Energy Resources L.P.May 11, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,104
- total depth, ft
- 1
- permits on file
- May 11, 2011
- last permit issued
- Mar 7, 2012
- completed
- 64.9K
- cumulative oil, bbl
- 161K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2011 THROUGH Jun 2023
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 7, 2012
- Shut in
- Jul 1, 2023
- 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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Guitar "4" O-10-41981 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 3 | 64.9K | 161K | Oct 2011 – Jun 2023 |
Oil, barrels lease total
Last 12 months 0 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Oct 2011 → Apr 2016
- 2Qstar Operating LLCMay 2016 → Dec 2016
- 3SM Energy CompanyJan 2017 → Mar 2017
- 4De Operating LLCApr 2017 → Apr 2017
- 5Parsley Energy Operations, LLCMay 2017 → Jan 2021
- 6Pioneer Natural Res. USA, Inc.Feb 2021 → Jun 2023
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 715913-99 | Drill | Endeavor Energy Resources L.P. | May 9, 2011 | May 11, 2011 | May 16, 2011 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 7, 2012 | Guitar 4 O-10-41981 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Shut In · shut in Jul 1, 2023 | 10,104 |
Formation tops
As filed on W-2/G-1. Subsea from 2,525 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| SpraberrySPRABERRY (TREND AREA) | 6,200 | -3,675 |
| Strawn | 9,450 | -6,925 |
| Strawn | 9,494 | -6,969 |
| Mississippian | 9,575 | -7,050 |
| Mississippian | 9,610 | -7,085 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,600 | 9,422 | Perforated |
| 7,600 | 9,993 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 308 | 17.5 | 400 S |
| 8.625 | 4,021 | 11 | 520 S |
| 5.5 | 10,104 | 7.875 | 1,395 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 | Nov 19, 2013 | Aug 27, 2013 | — |
| 00 | Nov 20, 2012 | Dec 1, 2011 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jun 2, 2014. 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 POROSITYSpans Spraberry, Strawn, Mississippian | TIFF | 5,000 to 10,070 | Jun 2, 2014run Jun 30, 2011 | 4.46 |
"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 42-227-36660 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-36660 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/22736660, documented in the API reference.