Petrora

WELL · 42-321-31458 · DISTRICT 3

Ohio-Sun Unit #31J

N

Matagorda County · Markham N.-Bay City N (McDonald) field  · Vertical

Ohio-Sun Unit #31J (API 42-321-31458) is a well in Matagorda County operated by Allegiant Resources LLC, completed August 16, 1985.

The RRC has issued 4 drilling permits between 1985 and 2007, permitted to 8,546 ft.

It was permitted by Comstock Oil & Gas, LP and has since transferred to Allegiant Resources LLC on the wellbore schedule.

Completion filings report 3 formation tops, including Miocene (undifferentiated), Anahuac, Frio.

Its 5 leases have reported 1.12M barrels of oil and 1.57M mcf of gas since January 1993, last reporting in July 2026. The leases carry 69 wells, so these are lease totals, not this well alone.

Operator of record

Allegiant Resources LLC

Permitted by Comstock Oil & Gas, LP; the EWA schedule now lists a different operator.

Lafayette, LA · P-5 Y, filed May 4, 2026 · 46 permits on file · (337) 769-0032

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore scheduleAllegiant Resources LLC
Production reportsAllegiant Resources, LLCthrough Apr 2026
Latest permitComstock Oil & Gas, LPAug 13, 2007

The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.

8,546
total depth, ft
4
permits on file
Aug 13, 2007
last permit issued
Aug 16, 1985
completed
1.12M
cumulative oil, bbl
1.57M
cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule
OFF SCHEDULE
Completed
Aug 16, 1985
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 5 leases this well is completed on; they carry 69 wells in total, so volumes are shared.Why →

LeaseFieldReporting operatorWellsOil, bblGas, mcfReported
Ohio-Sun Unit O-3-2998Markham N.-Bay City,n(cornelius)Allegiant Resources, LLC531.05M1.25MJan 1993 – Jul 2026
Ohio-Sun Unit O-3-2999Markham N.-Bay City,n (McDonald)Allegiant Resources, LLC1369.8K107KJan 1993 – Jul 2026
Ohio Sun Unit O-3-23964Markham N.-Bay CITY,N(MARK.7900)Premier Natural Resources, LLC14.19K10.1KJan 2001 – Jan 2009
Ohio-Sun Unit G-3-173735Markham N.-Bay CITY,N(MARK.7900)Marathon Oil Company1039.1KJul 1999 – Jan 2002
Ohio-Sun Unit G-3-161714Markham N.-Bay City, N (Braman)Marathon Oil Company10167KJan 1997 – Sep 1999

Oil, barrels lease total

Last 12 months 15,646 · prior 12 19,514(-20%)

01K2K3K202420252026

Gas, mcf lease total

Last 12 months 14,497 · prior 12 19,275(-25%)

01K2K3K202420252026

Chain of custody

Every operator that reported production on this well's lease, in order.

  1. 1Marathon Oil CompanyJan 1993 → Nov 2002
  2. 2Comstock Oil & Gas, Inc.Dec 2002 → Oct 2004
  3. 3Comstock Oil & Gas, LPNov 2004 → Aug 2008
  4. 4Premier Natural Resources, LLCSep 2008 → Sep 2015
  5. 5Remora Management, LLCOct 2015 → Jul 2019
  6. 6Allegiant Resources, LLCAug 2019 → Apr 2026

Permits

PermitTypeOperatorReceivedIssuedSpudDepth
644091-99RecompletionComstock Oil & Gas, LPAug 8, 2007Aug 13, 2007Jul 26, 20078,546
486035-99RecompletionMarathon Oil CompanyJul 21, 1999Jul 21, 1999Jun 29, 19998,546
457929-99RecompletionMarathon Oil CompanyJan 29, 1997Jan 29, 1997Jan 16, 19978,546
279578-99DrillMarathon Oil CompanyJul 3, 1985Jul 3, 1985Aug 2, 19858,500

Completions

CompletedLeaseFieldOperatorStatusDepth
—— G-3-161714————
—— G-3-173735————
—— O-3-2998————
—— O-3-2999————
—— O-3-23964————

Formation tops

As filed on W-2/G-1. Subsea from 57 ft elevation.Download CSV →

FormationMD ftSubsea
Miocene (undifferentiated)MIOCENE2,500-2,443
Anahuac5,500-5,443
Frio6,500-6,443

Perforations

Perforated and open-hole intervals.

FromToType
7,7427,744Perforated
7,8627,866Perforated
8,0228,026Perforated
8,3828,389Perforated

Casing

Strings as reported, shallowest first.

Casing inSet atHole inCement
9.6251,30012.25550 S
5.58,5458.52,185 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 →

SuffixFiledW-2 / G-1 dateLogs referenced
00Feb 11, 2009Nov 24, 2008Yes
00Jan 13, 2009Mar 9, 2001—
00May 25, 2001Mar 9, 2001—
00Apr 4, 2001——
00Aug 19, 1999Jul 21, 1999—
00Aug 11, 1999——
00Mar 6, 1997Feb 10, 1997Yes
00Mar 3, 1997——
00Oct 21, 1985Sep 5, 1985—
00Sep 26, 1985——

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.

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/32131458, documented in the API reference.