TEXAS · WELLS · MARTIN COUNTY · DARWIN "22" LEASE · API 42-317-37559 · DISTRICT 7B
Darwin 22 #2
Martin County · Spraberry (Trend Area) field · Producing · Vertical
- Fields on the latest permit · any of 4
- Hill Ranch (Miss) · Mon Bak (Strawn) · Paul Page (Atoka) · Spraberry (Trend Area)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Darwin 22 #2 (API 42-317-37559) is a well in Martin County operated by Pioneer Natural Res. USA Inc., completed May 25, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued February 23, 2012, permitted to 11,071 ft.
Completion filings report 6 formation tops, including Spraberry, Dean, Wolfcamp, Strawn.
Its lease has reported 76.5K barrels of oil and 114K mcf of gas since October 2011, last reporting volume in May 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Spring, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jul 8, 2026
- Permits on file
- 15,637
- 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 May 2026 |
| Latest permit | Pioneer Natural Res. USA, Inc.Feb 23, 2012 |
- 11,071
- total depth, ft
- 1
- permits on file
- Feb 23, 2012
- last permit issued
- May 25, 2012
- completed
- 76.5K
- cumulative oil, bbl
- 114K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · OCT 2011 THROUGH MAY 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 25, 2012
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH AUG 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Darwin "22" O-10-41965 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 2 | 76.5K | 114K | Oct 2011 – May 2026 |
Oil, barrels lease total
Last 12 months 2,335 · prior 12 2,701(-14%)
Gas, mcf lease total
Last 12 months 4,232 · prior 12 5,545(-24%)
Wells named Darwin 22
Pioneer Natural Res. USA Inc.'s other wells filed under this lease name in Martin County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Operator on the lease's P-4
Each operator named on the P-4 filings for this well's lease (a gas well is its own lease), from the date its filing took effect. The P-4 is filed by lease, so a date before the well was drilled is the lease's.
| Operator | From | To |
|---|---|---|
| Pioneer Natural Res. USA, Inc. | Oct 3, 2011 | today |
Reporting production
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Oct 2011 → May 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 733722-99 | Drill | Pioneer Natural Res. USA, Inc. | Feb 13, 2012 | Feb 23, 2012 | Apr 13, 2012 | 11,470 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 25, 2012 | Darwin 22 O-10-41965 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Producing | 11,071 |
Formation tops
As filed on W-2/G-1. Subsea from 2,601 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,967 | 8,183 | Perforated |
| 8,326 | 8,468 | Perforated |
| 8,528 | 9,919 | Perforated |
| 10,073 | 10,129 | Perforated |
| 10,133 | 10,133 | Perforated |
| 10,287 | 10,809 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 333 | 11 | 200 S |
| 5.5 | 11,067 | 7.875 | 1,120 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 | Aug 6, 2013 | Aug 15, 2012 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Sep 10, 2013. Neutron.
Click a log to get its files from the RRC (free account). It opens in a new tab on the RRC's log search for this well, which lists each file to view or download; the RRC has no address for a single file.
| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Spraberry, Dean, Wolfcamp, Strawn, Atoka, Mississippian | TIFF | 3,468 to 11,037 | Sep 10, 2013run May 1, 2012 | 3.69 |
"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.
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.
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 42-317-37559 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-37559 → 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/31737559, documented in the API reference.