TEXAS · WELLS · MARTIN COUNTY · JALONICK "21-A" LEASE · API 42-317-34304 · DISTRICT 7B
Jalonick 21-A #4
Martin County · Spraberry (Trend Area) field · Vertical
Jalonick 21-A #4 (API 42-317-34304) is a plugged well in Martin County, plugged December 8, 2010, last operated by Diamondback E&P LLC.
The RRC has issued one drilling permit, issued November 7, 2000, permitted to 9,400 ft.
It was permitted by Energen Resources Corporation and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Yates, San Andres, Spaberry, Spraberry.
Its lease has reported 98.6K barrels of oil and 169K mcf of gas since January 2001, last reporting volume in February 2026. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Energen Resources Corporation; 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 Feb 2026 |
| Latest permit | Energen Resources CorporationNov 7, 2000 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,400
- total depth, ft
- 1
- permits on file
- Nov 7, 2000
- last permit issued
- —
- completed
- 98.6K
- cumulative oil, bbl
- 169K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2001 THROUGH Feb 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- Dec 8, 2010
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 |
|---|---|---|---|---|---|---|
| Jalonick "21-A" O-10-36563 | Spraberry (Trend Area) | Diamondback E&P LLC | 3 | 98.6K | 169K | Jan 2001 – Feb 2026 |
Oil, barrels lease total
Last 12 months 512 · prior 12 2,624(-80%)
Gas, mcf lease total
Last 12 months 1,278 · prior 12 6,913(-82%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Energen Resources CorporationJan 2001 → Jan 2019
- 2Diamondback E&P LLCFeb 2019 → Feb 2026
- 3Pbex Operations, LLCJul 2024 → Apr 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 501717-99 | Drill | Energen Resources Corporation | Nov 7, 2000 | Nov 7, 2000 | Dec 15, 2000 | 9,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | Jalonick 21-A O-10-36563 | Spraberry (Trend Area) | Diamondback E&P LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,705 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,520 | 185 |
| San Andres | 4,180 | -1,475 |
| Spaberry | 7,410 | -4,705 |
| Spraberry | 7,410 | -4,705 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,383 | 7,752 | Perforated |
| 7,905 | 8,296 | Perforated |
| 8,680 | 9,132 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 334 | 11 | 180 S |
| 4.5 | 9,309 | 7.875 | 1,200 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 26, 2010 | Sep 29, 2009 | — |
| 00 | Dec 14, 2009 | Jun 26, 2009 | — |
| 00 | May 9, 2001 | Mar 8, 2001 | Yes |
| 00 | Mar 23, 2001 | — | — |
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 42-317-34304 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-34304 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/31734304, documented in the API reference.