TEXAS · WELLS · MIDLAND COUNTY · API 42-329-35772 · DISTRICT 7B
Gailan #1
Midland County · Spraberry (Trend Area) field · Shut In · Vertical
Gailan #1 (API 42-329-35772) is a well in Midland County operated by Pioneer Natural Res. USA Inc., completed September 17, 2007 and listed as shut in on the RRC schedule, shut in April 1, 2022.
The RRC has issued 2 drilling permits (amended twice) between 2007 and 2009, permitted to 10,620 ft.
It was permitted by Devon Energy Production CO, L.P. and has since transferred to Pioneer Natural Res. USA Inc. on the wellbore schedule.
Completion filings report 3 formation tops, including Spraberry, Dean, Wolfcamp.
Its 2 leases have reported 442K barrels of oil and 1.13M mcf of gas since August 2007, last reporting volume in April 2026. The leases carry 9 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Devon Energy Production Co, 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 Apr 2026 |
| Latest permit | Devon Energy Production Co, L.P.Jul 28, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,620
- total depth, ft
- 4
- permits on file
- Jul 28, 2009
- last permit issued
- Sep 17, 2007
- completed
- 442K
- cumulative oil, bbl
- 1.13M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2007 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 17, 2007
- Shut in
- Apr 1, 2022
- 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 2 leases this well is completed on; they carry 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Gailan O-10-39392 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 8 | 442K | 1.13M | Aug 2007 – Apr 2026 |
| Gailan O-10-38461 | Sallie Ann (Spraberry-Wolfcamp) | Devon Energy Production Co, L.P. | 1 | 0 | 0 | Aug 2007 – — |
Oil, barrels lease total
Last 12 months 4,341 · prior 12 4,020(+8%)
Gas, mcf lease total
Last 12 months 15,727 · prior 12 16,600(-5%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Production Co, L.P.Aug 2007 → Aug 2016
- 2EXL Petroleum, LPOct 2007 → Oct 2008
- 3Pioneer Natural Res. USA, Inc.Sep 2016 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 683485-98 | Field transfer | Devon Energy Production Co, L.P. | Oct 15, 2009 | Jul 28, 2009 | Aug 7, 2007 | 11,000 |
| 683485-99 | Field transfer | Devon Energy Production Co, L.P. | Jul 27, 2009 | Jul 28, 2009 | — | 11,000 |
| 641215-98 | Drill | EXL Petroleum, LP | Dec 5, 2007 | Jul 3, 2007 | Jul 14, 2007 | 11,000 |
| 641215-99 | Drill | EXL Petroleum, LP | Jun 21, 2007 | Jul 3, 2007 | Jul 14, 2007 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 17, 2007 | Gailan O-10-39392 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Shut In · shut in Apr 1, 2022 | 10,620 |
| Sep 17, 2007 | Gailan O-10-39392 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Shut In · shut in Apr 1, 2022 | 10,620 |
| Sep 17, 2007 | Gailan O-10-38461 | Sallie Ann (Spraberry-Wolfcamp) | Devon Energy Production Co L.P. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,894 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,010 | 10,510 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 272 | 12.25 | 150 S |
| 5.5 | 10,620 | 8.75 | 1,260 S |
| 5.5 | — | — | 750 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 | Dec 11, 2009 | Jul 31, 2009 | Yes |
| 00 | Nov 2, 2009 | Dec 5, 2007 | Yes |
| 00 | Feb 13, 2008 | Dec 5, 2007 | Yes |
| 00 | Jan 29, 2008 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Aug 23, 2010. 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, Dean, Wolfcamp | TIFF | 6,000 to 10,615 | Aug 23, 2010run Sep 5, 2007 | 2.12 |
"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 42-329-35772 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-35772 → 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/32935772, documented in the API reference.