WELL · 42-003-37987 · DISTRICT 8
North Block 12 Unit #10
Andrews County · Block a-49 (Devonian) field · NO Production · Vertical
North Block 12 Unit #10 (API 42-003-37987) is a well in Andrews County operated by Bass Petroleum Inc, completed November 16, 1996 and listed as no production on the RRC schedule.
The RRC has issued one drilling permit, issued September 17, 1996, permitted to 11,500 ft.
It was permitted by Costilla Petroleum Corporation and has since transferred to Bass Petroleum Inc on the wellbore schedule.
Completion filings report 4 formation tops, including Rustler, Tubb, Woodford, Devonian.
Its lease has reported 587K barrels of oil and 58.5K mcf of gas since January 1993, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Costilla Petroleum Corporation; the EWA schedule now lists a different operator.
Austin, TX · P-5 Y, filed Feb 4, 2026 · 5 permits on file · (512) 947-5974
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Bass Petroleum Inc |
| Production reports | Bass Petroleum, Incthrough Jan 2019 |
| Latest permit | Costilla Petroleum CorporationSep 17, 1996 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,500
- total depth, ft
- 1
- permits on file
- Sep 17, 1996
- last permit issued
- Nov 16, 1996
- completed
- 587K
- cumulative oil, bbl
- 58.5K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 16, 1996
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Delinquent
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| North Block 12 Unit O-10-19954 | Block a-49 (Devonian) | Bass Petroleum, Inc | 4 | 587K | 58.5K | Jan 1993 – Jul 2026 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Conoco Inc.Jan 1993 → Feb 1994
- 2Costilla Petroleum CorporationMar 1994 → Jan 1997
- 3Costilla Energy, Inc.Feb 1997 → Nov 1998
- 4Concho Resources Inc.Dec 1998 → Jul 1999
- 5Vista Resources, Inc. (A)Aug 1999 → Feb 2000
- 6Prize Operating CompanyMar 2000 → Mar 2002
- 7Gruy Petroleum Management Co.Apr 2002 → Apr 2006
- 8Cimarex Energy Co. of ColoradoMay 2006 → Nov 2006
- 9Quantum Resources Management,llcDec 2006 → Aug 2009
- 10Bass Petroleum, IncSep 2009 → Jan 2019
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 452742-99 | Drill | Costilla Petroleum Corporation | Sep 17, 1996 | Sep 17, 1996 | Sep 26, 1996 | 11,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-19954 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,414 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,615 | 8,637 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 330 | 17.5 | 350 S |
| 9.625 | 5,728 | 12.25 | 400 S |
| 5.5 | 8,618 | 7.875 | 475 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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Mar 24, 1997 | Feb 20, 1997 | Yes |
| 00 | Mar 7, 1997 | — | — |
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 42-003-37987 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-37987 → 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/00337987, documented in the API reference.