WELL · 42-105-35448 · DISTRICT 7
Shannon M. A. Est. -O- #26
Crockett County · Olson field · Vertical
Shannon M. A. Est. -O- #26 (API 42-105-35448) is a well in Crockett County operated by Aspen Operating Company L.L.C., completed February 24, 1988.
The RRC has issued one drilling permit, issued October 14, 1987, permitted to 2,500 ft.
It was permitted by Marathon Oil Company and has since transferred to Aspen Operating Company L.L.C. on the wellbore schedule.
Completion filings report one formation top, including San Andres.
Its 2 leases have reported 2.39M barrels of oil and 46 mcf of gas since January 1993, last reporting in July 2026. The leases carry 74 wells, so these are lease totals, not this well alone.
Operator of record
Aspen Operating Company L.L.C.
Permitted by Marathon Oil Company; the EWA schedule now lists a different operator.
- Based in
- Fort Worth, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 12, 2026
- Permits on file
- 124
- Phone
- (817) 882-9063
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Aspen Operating Company L.L.C. |
| Production reports | Aspen Operating Company, L.L.C.through Apr 2026 |
| Latest permit | Marathon Oil CompanyOct 14, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 2,500
- total depth, ft
- 1
- permits on file
- Oct 14, 1987
- last permit issued
- Feb 24, 1988
- completed
- 2.39M
- cumulative oil, bbl
- 46
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 24, 1988
- Shut in
- —
- Plugged
- —
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 74 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Shannon Estate O-9-1138 | Olson | Aspen Operating Company, L.L.C. | 50 | 1.32M | 25 | Jan 1993 – Jul 2026 |
| Shannon, M. A., Est. -O- O-9-1137 | Olson | Aspen Operating Company, L.L.C. | 24 | 1.07M | 21 | Jan 1993 – Jun 2015 |
Oil, barrels lease total
Last 12 months 143,246 · prior 12 156,924(-9%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil CompanyJan 1993 → Nov 1999
- 2Grasha, Matthew P.Jan 1993 → Sep 1993
- 3Las Animas Production CompanyOct 1993 → Sep 1994
- 4Gresham Oil & Gas (USA) Inc.Oct 1994 → Mar 1996
- 5Tracy ProductionApr 1999 → Oct 2007
- 6Henry Petroleum Corp.Dec 1999 → Mar 2001
- 7Henry Petroleum LPApr 2001 → Dec 2004
- 8Aspen Operating Company, L.L.C.Jan 2005 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 337335-99 | Drill | Marathon Oil Company | Oct 14, 1987 | Oct 14, 1987 | — | 2,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-1137 | — | — | — | — |
| — | — O-9-1138 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,540 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Andres | 2,112 | 428 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,097 | 2,135 | Perforated |
| 2,097 | 2,146 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 714 | 12.25 | 600 S |
| 5.5 | 2,304 | 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 | May 4, 2015 | Mar 15, 1988 | — |
| 00 | Mar 25, 1988 | Mar 15, 1988 | — |
| 00 | Jan 6, 1988 | Dec 21, 1987 | Yes |
| 00 | Dec 30, 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 42-105-35448 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-105-35448 → 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/10535448, documented in the API reference.