TEXAS · WELLS · MARTIN COUNTY · API 42-317-34048 · DISTRICT 7B
Anderson 11 #1R
Martin County · Spraberry (Trend Area) field · Producing · Vertical
Anderson 11 #1R (API 42-317-34048) is a well in Martin County operated by Diamondback E&P LLC, completed December 16, 2008 and listed as producing on the RRC schedule.
The RRC has issued 3 drilling permits (amended once) between 1996 and 2009, permitted to 10,023 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 4 formation tops, including San Andres, Spraberry, Dean, Wolfcamp.
Its 2 leases have reported 49K barrels of oil and 87K mcf of gas since April 2008, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
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
- 5,237
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Cobra Oil & Gas CorporationJan 13, 2009 |
- 10,023
- total depth, ft
- 4
- permits on file
- Jan 13, 2009
- last permit issued
- Dec 16, 2008
- completed
- 49K
- cumulative oil, bbl
- 87K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2008 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 16, 2008
- 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 2 leases 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 |
|---|---|---|---|---|---|---|
| Anderson 11 O-10-39260 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 47.3K | 82.2K | Aug 2008 – Jul 2026 |
| Anderson Unit 11 O-10-38781 | Hamilton Draw (Strawn) | Cobra Oil & Gas Corporation | 1 | 1.71K | 4.75K | Apr 2008 – May 2009 |
Oil, barrels lease total
Last 12 months 1,322 · prior 12 1,487(-11%)
Gas, mcf lease total
Last 12 months 197 · prior 12 486(-59%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cobra Oil & Gas CorporationApr 2008 → Nov 2011
- 2Energen Resources CorporationDec 2011 → Jan 2019
- 3Diamondback E&P LLCFeb 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 668906-98 | Recompletion | Cobra Oil & Gas Corporation | Jan 5, 2009 | Jan 13, 2009 | Aug 4, 2008 | 10,023 |
| 668906-99 | Recompletion | Cobra Oil & Gas Corporation | Aug 12, 2008 | Sep 4, 2008 | — | 10,023 |
| 650342-99 | Reenter | Cobra Oil & Gas Corporation | Nov 28, 2007 | Dec 10, 2007 | Jan 17, 2008 | 10,000 |
| 453508-99 | Drill | Cobra Oil & Gas Corporation | Oct 7, 1996 | Oct 7, 1996 | Oct 7, 1996 | 11,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 16, 2008 | Anderson 11 O-10-39260 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,023 |
| Apr 10, 2008 | Anderson Unit 11 O-10-38781 | Hamilton Draw (Strawn) | Cobra Oil & Gas Corporation | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,492 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Andres | 3,406 | -914 |
| SpraberryUPPER SPRABERRY | 6,592 | -4,100 |
| SpraberryLOWER SPRABERRY | 7,110 | -4,618 |
| Dean | 7,866 | -5,374 |
| Wolfcamp | 8,061 | -5,569 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,845 | 9,782 | Perforated |
| 6,854 | 9,716 | Perforated |
| 6,854 | 9,782 | Perforated |
| 9,754 | 9,782 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 226 | 17.5 | 240 S |
| 9.625 | 4,345 | 12.25 | 1,500 S |
| 5.5 | 10,023 | 8.75 | 800 S |
| 5.5 | 10,023 | 80 | — |
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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Apr 27, 2010 | Jan 20, 2009 | — |
| 00 | Apr 13, 2010 | Jun 2, 2009 | — |
| 00 | Jun 16, 2009 | Oct 6, 2008 | — |
| 00 | May 5, 2009 | May 7, 2008 | — |
| 00 | Dec 19, 2008 | May 7, 2008 | — |
| 00 | Nov 5, 2008 | — | — |
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 42-317-34048 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-34048 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. then paste it into their 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/31734048, documented in the API reference.