TEXAS · WELLS · MARTIN COUNTY · STRAIN '21' LEASE · API 42-317-39468 · DISTRICT 7B
Strain 21 #1
Martin County · Spraberry (Trend Area) field · Producing · Vertical
Strain 21 #1 (API 42-317-39468) is a well in Martin County operated by Diamondback E&P LLC, completed August 28, 2014 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 17, 2014, permitted to 10,875 ft.
It was permitted by Endeavor Energy Resources L.P. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Cisco, Devonian, Fusselman, Grayburg.
Its lease has reported 138K barrels of oil and 234K mcf of gas since August 2014, last reporting volume in April 2026. The lease carries 2 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
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,251
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Endeavor Energy Resources L.P.May 17, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,875
- total depth, ft
- 1
- permits on file
- May 17, 2014
- last permit issued
- Aug 28, 2014
- completed
- 138K
- cumulative oil, bbl
- 234K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2014 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 28, 2014
- 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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Strain '21' O-10-45699 | Spraberry (Trend Area) | Diamondback E&P LLC | 2 | 138K | 234K | Aug 2014 – Apr 2026 |
Oil, barrels lease total
Last 12 months 1,740 · prior 12 3,474(-50%)
Gas, mcf lease total
Last 12 months 13,225 · prior 12 21,898(-40%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Aug 2014 → Dec 2024
- 2Diamondback E&P LLCJan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 785002-99 | Drill | Endeavor Energy Resources L.P. | Apr 17, 2014 | May 17, 2014 | May 21, 2014 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 28, 2014 | Strain 21 O-10-45699 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,875 |
Formation tops
As filed on W-2/G-1. Subsea from 2,578 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Cisco | — | — |
| Devonian | — | — |
| Fusselman | — | — |
| Grayburg | — | — |
| Pennsylvanian | — | — |
| Queen | — | — |
| San AndresSAN ANDRES - ACTIVE CO2 FLOOD; H | — | — |
| Santa Rosa | — | — |
| Silurian (undifferentiated)SILURIAN | — | — |
| Yates | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,722 | 10,702 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 333 | 17.5 | 350 S |
| 8.625 | 4,678 | 11 | 650 S |
| 5.5 | 10,875 | 7.875 | 1,230 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 4, 2015 | Nov 24, 2014 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jun 14, 2017. 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 | TIFF | 48 to 10,796 | Jun 14, 2017 | 5.05 |
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 42-317-39468 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-39468 → 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/31739468, documented in the API reference.