TEXAS · WELLS · MARTIN COUNTY · HEREDIA 46A LEASE · API 42-317-36036 · DISTRICT 7B
Heredia 46A #1
Martin County · Spraberry (Trend Area) field · Producing · Vertical
Heredia 46a #1 (API 42-317-36036) is a well in Martin County operated by Diamondback E&P LLC, completed January 25, 2011 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 26, 2010, permitted to 10,803 ft.
It was permitted by Cobra Oil & Gas Corporation and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Clear Fork, Spraberry, Dean, Wolfcamp.
Its lease has reported 54.2K barrels of oil and 249K mcf of gas since October 2010, last reporting volume in April 2026.
Operator of record
Permitted by Cobra Oil & Gas 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 Apr 2026 |
| Latest permit | Cobra Oil & Gas CorporationMay 26, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,803
- total depth, ft
- 1
- permits on file
- May 26, 2010
- last permit issued
- Jan 25, 2011
- completed
- 54.2K
- cumulative oil, bbl
- 249K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2010 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 25, 2011
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Heredia 46A O-10-40601 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 54.2K | 249K | Oct 2010 – Apr 2026 |
Oil, barrels lease total
Last 12 months 3,527 · prior 12 2,924(+21%)
Gas, mcf lease total
Last 12 months 6,526 · prior 12 1,158
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cobra Oil & Gas CorporationOct 2010 → Nov 2011
- 2Energen Resources CorporationDec 2011 → Jan 2019
- 3Diamondback E&P LLCFeb 2019 → Apr 2026
- 4Endeavor Energy Resources L.P.Mar 2022 → Nov 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 696309-99 | Drill | Cobra Oil & Gas Corporation | May 19, 2010 | May 26, 2010 | Jun 6, 2010 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 25, 2011 | Heredia 46A O-10-40601 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,803 |
Formation tops
As filed on W-2/G-1. Subsea from 2,578 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Clear ForkCLEARFORK | 5,158 | -2,580 |
| SpraberryUPPER SPRABERRY | 6,806 | -4,228 |
| SpraberryLOWER SPRABERRY | 7,294 | -4,716 |
| Dean | 8,080 | -5,502 |
| WolfcampWOLFCAMP SHALE | 8,304 | -5,726 |
| MississippianMISS | 9,988 | -7,410 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,650 | 9,821 | Perforated |
| 9,988 | 10,616 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 342 | 17.5 | 345 S |
| 8.625 | 4,530 | 11 | 990 S |
| 5.5 | 10,803 | 7.875 | 1,300 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 | Jul 12, 2011 | Feb 8, 2011 | — |
| 00 | Apr 21, 2011 | Nov 22, 2010 | Yes |
| 00 | Apr 14, 2011 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Jun 25, 2013. Density, 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/DENSITY POROSITYSpans Clear Fork, Spraberry, Dean, Wolfcamp, Mississippian | TIFF | 100 to 10,798 | Jun 25, 2013run Jun 22, 2010 | 10.6 |
"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 42-317-36036 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-36036 → 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/31736036, documented in the API reference.