WELL · 42-105-35211 · DISTRICT 7
Olson Unit #415
Crockett County · Olson field · Vertical
Olson Unit #415 (API 42-105-35211) is a well in Crockett County operated by Aspen Operating Company L.L.C., completed February 7, 1986.
The RRC has issued one drilling permit, issued December 23, 1985, permitted to 2,400 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 4 formation tops, including Yates, Seven Rivers, Queen, San Andres.
Its 2 leases have reported 2.11M barrels of oil and 36.5K mcf of gas since January 1993, last reporting in July 2026. The leases carry 113 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 CompanyDec 23, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 2,400
- total depth, ft
- 1
- permits on file
- Dec 23, 1985
- last permit issued
- Feb 7, 1986
- completed
- 2.11M
- cumulative oil, bbl
- 36.5K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 7, 1986
- 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 113 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Olson Unit G-9-260204 | Olson | Aspen Operating Company, L.L.C. | 1 | 0 | 36.5K | Sep 2010 – Jul 2026 |
| Olson Unit O-9-4689 | Olson | Aspen Operating Company, L.L.C. | 112 | 2.11M | 18 | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 1,191 · prior 12 1,198(-1%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil CompanyJan 1993 → Nov 1999
- 2Henry Petroleum Corp.Dec 1999 → Mar 2001
- 3Henry Petroleum LPApr 2001 → Dec 2004
- 4Aspen Operating Company, L.L.C.Jan 2005 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 294001-99 | Drill | Marathon Oil Company | Dec 23, 1985 | Dec 23, 1985 | — | 2,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-9-260204 | — | — | — | — |
| — | — O-9-4689 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,650 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,182 | 1,468 |
| Seven Rivers | 1,300 | 1,350 |
| Queen | 1,760 | 890 |
| San Andres | 2,092 | 558 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,797 | 1,966 | Perforated |
| 2,112 | 2,128 | Perforated |
| 2,144 | 2,150 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 666 | 12.25 | 450 S |
| 8.625 | 703 | 12.25 | 450 S |
| 4 | 2,275 | 5.5 | 200 S |
| 5.5 | 2,386 | 7.875 | 900 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 | Aug 23, 2011 | Jan 6, 2011 | — |
| 00 | Jul 14, 2011 | — | — |
| 00 | Mar 12, 1986 | Feb 27, 1986 | Yes |
| 00 | Mar 11, 1986 | — | — |
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 42-105-35211 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-105-35211 → 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/10535211, documented in the API reference.