TEXAS · WELLS · GONZALES COUNTY · TROELL, E. LEASE · API 42-177-31883 · DISTRICT 01
Troell E. #1
Gonzales County · First Shot (Austin Chalk) field · Horizontal
Troell E. #1 (API 42-177-31883) is a plugged horizontal well in Gonzales County, plugged August 23, 2014, last operated by Marathon Oil EF LLC.
The RRC has issued one drilling permit, issued February 25, 1991, permitted to 12,013 ft.
It was permitted by Marathon Oil Company and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Anacacho, Austin Chalk.
Its lease has reported 43.9K barrels of oil and 17.8K mcf of gas since January 1993, last reporting in December 2014.
Operator of record
Permitted by Marathon Oil Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 26, 2025
- Permits on file
- 3,191
- Phone
- (832) 486-2737
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Jul 2014 |
| Latest permit | Marathon Oil CompanyFeb 25, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,013
- total depth, ft
- 1
- permits on file
- Feb 25, 1991
- last permit issued
- Apr 27, 1991
- completed
- 43.9K
- cumulative oil, bbl
- 17.8K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Dec 2014
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 27, 1991
- Shut in
- —
- Plugged
- Aug 23, 2014
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 |
|---|---|---|---|---|---|---|
| Troell, E. O-1-13075 | First Shot (Austin Chalk) | Marathon Oil EF LLC | 1 | 43.9K | 17.8K | Jan 1993 – Dec 2014 |
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.
- 1Tiza, Inc.Jan 1993 → Jan 1993
- 2Tiza Operating CompanyFeb 1993 → Nov 1995
- 3Ames Oil Corporation of TexasDec 1995 → Apr 2004
- 4Atlas Fuel Supply, Ltd.May 2004 → May 2010
- 5Hilcorp Energy CompanyJun 2010 → Oct 2011
- 6Marathon Oil EF LLCNov 2011 → Jul 2014
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 385042-99 | Drill | Marathon Oil Company | Feb 25, 1991 | Feb 25, 1991 | Mar 5, 1991 | 12,013 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 27, 1991 | Troell E. O-1-13075 | First Shot (Austin Chalk) | Marathon Oil EF LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 242 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 8,331 | -8,089 |
| Austin Chalk | 8,501 | -8,259 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,506 | 12,106 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,010 | 14.75 | 700 S |
| 7 | 8,506 | 9.875 | 390 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 | Jun 26, 1991 | May 20, 1991 | Yes |
| 00 | Jun 24, 1991 | — | — |
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 42-177-31883 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-177-31883 → 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/17731883, documented in the API reference.