WELL · 42-321-31525 · DISTRICT 3
Ohio-Sun Unit #41A
Matagorda County · Markham N.-Bay City N(MARK.7900) field · Vertical
Ohio-Sun Unit #41A (API 42-321-31525) is a well in Matagorda County operated by Comstock Oil & Gas Inc., completed January 9, 2000.
The RRC has issued 4 drilling permits between 1986 and 2003, permitted to 8,626 ft.
Completion filings report 7 formation tops, including Miocene (undifferentiated), Anahauc, Anahuac, Robertson.
Its 4 leases have reported 1.8M barrels of oil and 1.79M mcf of gas since January 1993, last reporting in July 2026. The leases carry 82 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Frisco, TX
- P-5 status
- Inactive (I)
- P-5 last filed
- Jan 12, 2004
- Permits on file
- 319
- Phone
- (800) 877-1322
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Comstock Oil & Gas Inc. |
| Production reports | Allegiant Resources, LLCthrough Apr 2026 |
| Latest permit | Comstock Oil & Gas, Inc.Feb 3, 2003 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,626
- total depth, ft
- 4
- permits on file
- Feb 3, 2003
- last permit issued
- Jan 9, 2000
- completed
- 1.8M
- cumulative oil, bbl
- 1.79M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 9, 2000
- 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 4 leases this well is completed on; they carry 82 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Ohio-Sun Unit G-3-193092 | Markham N.-Bay City, N (League) | Allegiant Resources, LLC | 1 | 0 | 7.69K | Feb 2003 – Jul 2026 |
| Ohio-Sun Unit O-3-2997 | Markham N.-Bay City, N (Cayce) | Allegiant Resources, LLC | 27 | 752K | 455K | Jan 1993 – Jul 2026 |
| 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 G-3-176030 | Markham N.-Bay CITY,N(MARK.7900) | Comstock Oil & Gas, Inc. | 1 | 0 | 76.8K | Jan 2000 – Feb 2003 |
Oil, barrels lease total
Last 12 months 12,705 · prior 12 13,001(-2%)
Gas, mcf lease total
Last 12 months 3,584 · prior 12 9,844(-64%)
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 |
|---|---|---|---|---|---|---|
| 528013-99 | Recompletion | Comstock Oil & Gas, Inc. | Feb 3, 2003 | Feb 3, 2003 | Feb 3, 2003 | 8,626 |
| 492414-99 | Recompletion | Marathon Oil Company | Feb 24, 2000 | Feb 24, 2000 | Jan 24, 2000 | 8,626 |
| 424095-99 | Recompletion | Marathon Oil Company | May 20, 1994 | May 20, 1994 | Mar 20, 1994 | 8,626 |
| 321471-99 | Drill | Marathon Oil Company | Oct 6, 1986 | Oct 20, 1986 | Nov 8, 1986 | 8,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-176030 | — | — | — | — |
| — | — G-3-193092 | — | — | — | — |
| — | — O-3-2997 | — | — | — | — |
| — | — O-3-2997 | — | — | — | — |
| — | — O-3-2998 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 58 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 2,500 | -2,442 |
| Anahauc | 5,500 | -5,442 |
| Anahuac | 5,500 | -5,442 |
| Robertson | 6,890 | -6,832 |
| Frio | 6,900 | -6,842 |
| League | 7,370 | -7,312 |
| Camp | 7,430 | -7,372 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,372 | 7,376 | Perforated |
| 7,680 | 7,685 | Perforated |
| 7,786 | 7,788 | Perforated |
| 7,806 | 7,811 | Perforated |
| 7,816 | 7,819 | Perforated |
| 7,865 | 7,868 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,300 | 14.75 | 960 S |
| 7.625 | 8,626 | 9.875 | 2,150 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 | Mar 27, 2003 | Feb 21, 2003 | Yes |
| 00 | Mar 7, 2003 | — | — |
| 00 | May 11, 2000 | Feb 24, 2000 | — |
| 00 | Apr 20, 2000 | Feb 24, 2000 | — |
| 00 | Apr 7, 2000 | Feb 24, 2000 | — |
| 00 | Mar 13, 2000 | — | — |
| 00 | Jul 3, 1995 | Jun 5, 1995 | — |
| 00 | Jun 1, 1994 | May 20, 1994 | Yes |
| 00 | May 24, 1994 | Jan 9, 1987 | Yes |
| 00 | Feb 17, 1987 | Jan 9, 1987 | Yes |
| 00 | Jan 24, 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 42-321-31525 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-321-31525 → 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/32131525, documented in the API reference.