WELL · 42-451-31772 · DISTRICT 7
Simpson-Mann C #11
Tom Green County · Atkinson W. (San Angelo) field · Producing · Vertical
Simpson-Mann C #11 (API 42-451-31772) is a well in Tom Green County operated by Core Petro LLC, completed June 3, 1987 and listed as producing on the RRC schedule, shut in April 1, 2026.
The RRC has issued one drilling permit, issued April 27, 1987, permitted to 1,030 ft.
It was permitted by Lawrence, C. F. & Assoc. Inc. and has since transferred to Core Petro LLC on the wellbore schedule.
Completion filings report one formation top, including San Angelo.
Its lease has reported 811 barrels of oil and 32 mcf of gas since January 1993, last reporting in July 2026.
Operator of record
Permitted by Lawrence, C. F. & Assoc. Inc.; the EWA schedule now lists a different operator.
- Based in
- Abilene, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 14, 2025
- Phone
- (325) 338-8717
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Core Petro LLC |
| Production reports | Core Petro, LLCthrough Apr 2026 |
| Latest permit | Lawrence, C. F. & Assoc. Inc.Apr 27, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 1,030
- total depth, ft
- 1
- permits on file
- Apr 27, 1987
- last permit issued
- Jun 3, 1987
- completed
- 811
- cumulative oil, bbl
- 32
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 3, 1987
- Shut in
- Apr 1, 2026
- Plugged
- —
Operator's P-5 on the schedule: Delinquent (D)
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 |
|---|---|---|---|---|---|---|
| Simpson-Mann "C" O-9-12217 | Atkinson, W. (San Angelo) | Core Petro, LLC | 1 | 811 | 32 | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 32 · prior 12 25(+28%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Lawrence, C. F. & Assoc. Inc.Jan 1993 → Jul 1994
- 2Earnest Producing CorporationAug 1994 → Aug 1995
- 3Core Petro, LLCJun 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 326679-99 | Drill | Lawrence, C. F. & Assoc. Inc. | Feb 17, 1987 | Apr 27, 1987 | — | 1,250 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 3, 1987 | Simpson-Mann C O-9-12217 | Atkinson W. (San Angelo) | Core Petro LLC | Producing · shut in Apr 1, 2026 | 1,030 |
Formation tops
As filed on W-2/G-1. Subsea from 2,167 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Angelo | 770 | 1,397 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 921 | 930 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 4.5 | 1,030 | 6.25 | 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 | Jul 8, 1987 | Jun 25, 1987 | Yes |
| 00 | Jul 2, 1987 | — | — |
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 42-451-31772 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-451-31772 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/45131772, documented in the API reference.