WELL · 42-321-00136 · DISTRICT 3
Ohio-Sun Unit #4L
Matagorda County · Vertical
Ohio-Sun Unit #4L (API 42-321-00136) is a plugged well in Matagorda County, plugged June 11, 1997, last operated by Marathon Oil Company.
The RRC has issued one drilling permit, issued October 5, 1979, permitted to 8,850 ft.
Completion filings report 3 formation tops, including Miocene (undifferentiated), Anahuac, Frio.
Its 2 leases have reported 1.05M barrels of oil and 1.25M mcf of gas since January 1993, last reporting in July 2026. The leases carry 55 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Houston, TX
- P-5 status
- Delinquent (D)
- P-5 last filed
- Aug 14, 2025
- Permits on file
- 3,707
- Phone
- (281) 293-1000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Allegiant Resources, LLCthrough Apr 2026 |
| Latest permit | Marathon Oil CompanyOct 5, 1979 |
- 8,850
- total depth, ft
- 1
- permits on file
- Oct 5, 1979
- last permit issued
- —
- completed
- 1.05M
- cumulative oil, bbl
- 1.25M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- Jun 11, 1997
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 55 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Ohio-Sun Unit O-3-2998 | Markham N.-Bay City,n(cornelius) | Allegiant Resources, LLC | 53 | 1.05M | 1.25M | Jan 1993 – Jul 2026 |
| Ohio-Sun Unit O-3-10416 | Markham, N.-Bay City, N. (7550) | Marathon Oil Company | 2 | 0 | 0 | Jan 1993 – Jul 1997 |
Oil, barrels lease total
Last 12 months 9,602 · prior 12 10,776(-11%)
Gas, mcf lease total
Last 12 months 3,577 · prior 12 6,248(-43%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil CompanyJan 1993 → Nov 2002
- 2Comstock Oil & Gas, Inc.Dec 2002 → Oct 2004
- 3Comstock Oil & Gas, LPNov 2004 → Aug 2008
- 4Premier Natural Resources, LLCSep 2008 → Sep 2015
- 5Remora Management, LLCOct 2015 → Jul 2019
- 6Allegiant Resources, LLCAug 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 59889-99 | Recompletion | Marathon Oil Company | Oct 5, 1979 | Oct 5, 1979 | — | 8,850 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-2998 | — | — | — | — |
| — | — O-3-10416 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 75 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 2,500 | -2,425 |
| Anahuac | 5,500 | -5,425 |
| Frio | 6,500 | -6,425 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,139 | — | Perforated |
| 7,509 | 7,519 | Perforated |
| 7,552 | 7,558 | Perforated |
| 8,372 | 8,379 | Perforated |
| 8,679 | 8,715 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 2,059 | 15 | 1,000 S |
| 10.375 | 2,059 | 15 | 1,000 S |
| 2.375 | 7,084 | — | — |
| 2.375 | 7,224 | — | — |
| 7 | 8,850 | 9.875 | 500 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 | Nov 21, 1985 | Nov 1, 1985 | — |
| 00 | Jan 12, 1984 | Mar 6, 1980 | — |
| 00 | Jan 12, 1984 | Mar 8, 1974 | — |
| 00 | Jan 12, 1984 | — | — |
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 42-321-00136 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-321-00136 → 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/32100136, documented in the API reference.