Petrora

WELL · 42-321-31225 · DISTRICT 3

Ohio-Sun Unit #18F

N

Matagorda County  · Vertical

Ohio-Sun Unit #18F (API 42-321-31225) is a disposal or injection well in Matagorda County operated by Premier Natural Resources, LLC under an active UIC permit.

The RRC has issued 7 drilling permits between 1982 and 2009, permitted to 8,550 ft.

Completion filings report 4 formation tops, including Miocene (undifferentiated), Anahauc, Anahuac, Frio.

Its 5 leases have reported 58.3K barrels of oil and 978K mcf of gas since January 1993, last reporting in July 2026. The leases carry 15 wells, so these are lease totals, not this well alone.

It holds an active disposal or injection permit, with 514K barrels injected in the 12 months reported through December 2025.

Operator of record

Premier Natural Resources, LLC

Tulsa, OK · P-5 Y, filed Nov 2, 2018 · 51 permits on file · (918) 392-3232

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedulenone
Production reportsAllegiant Resources, LLCthrough Jun 2022
Latest permitPremier Natural Resources, LLCMar 11, 2009
8,550
total depth, ft
7
permits on file
Mar 11, 2009
last permit issued
—
completed
58.3K
cumulative oil, bbl
978K
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
—

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 15 wells in total, so volumes are shared.Why →

LeaseFieldReporting operatorWellsOil, bblGas, mcfReported
Ohio-Sun Unit G-3-167197Markham N.-Bay CITY,N(MARK.7900)Allegiant Resources, LLC10263KFeb 1998 – Jul 2026
Ohio-Sun Unit O-3-12601Markham N.-Bay City, N (Betts)Allegiant Resources, LLC1258.3K116KJan 1993 – Jul 2026
Ohio-Sun Unit G-3-151973Markham N.-Bay City, N (Everett)Marathon Oil Company10435KNov 1994 – Feb 1998
Ohio-Sun Unit G-3-146588Markham N.-Bay City, N (Betts)Marathon Oil Company10164KJul 1993 – Jan 1995
— G-3-130156——000—

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.

  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, LLCNov 2009 → Sep 2010
  5. 5Allegiant Resources, LLCMar 2020 → Jun 2022

Permits

PermitTypeOperatorReceivedIssuedSpudDepth
674114-99RecompletionPremier Natural Resources, LLCOct 30, 2008Mar 11, 2009—8,550
474216-99RecompletionMarathon Oil CompanyMar 10, 1998Mar 13, 1998Feb 17, 19988,550
430774-99RecompletionMarathon Oil CompanyDec 8, 1994Dec 8, 1994Nov 6, 19948,550
373288-99RecompletionMarathon Oil CompanyMay 14, 1990May 17, 1990—8,550
353170-99RecompletionMarathon Oil CompanyNov 9, 1988Nov 10, 1988—8,500
164076-99DrillMarathon Oil CompanyJun 17, 1982Jun 17, 1982—8,550
151643-99DrillMarathon Oil CompanyFeb 11, 1982Feb 11, 1982—8,500

Completions

CompletedLeaseFieldOperatorStatusDepth
—— G-3-130156————
—— G-3-146588————
—— G-3-151973————
—— G-3-167197————
—— O-3-12601————

Formation tops

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

FormationMD ftSubsea
Miocene (undifferentiated)MIOCENE2,500-2,443
Anahauc5,500-5,443
Anahuac5,500-5,443
Frio6,500-6,443
Frio6,900-6,843

Perforations

Perforated and open-hole intervals.

FromToType
5,3335,353Perforated
5,4045,414Perforated
7,9247,928Perforated
7,9307,932Perforated
8,0288,030Perforated
8,1848,194Perforated
8,2128,217Perforated
8,2798,283Perforated
8,3258,329Perforated
8,4728,477Perforated

Casing

Strings as reported, shallowest first.

Casing inSet atHole inCement
8.6252,64012.251,240 S
2.8758,344——
5.58,5327.8751,120 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 19, 2004Jan 9, 2004—
00Jan 31, 2000Dec 8, 1999—
00Apr 7, 1998Mar 9, 1998Yes
00Mar 30, 1998——
00Jan 2, 1995Dec 7, 1994Yes
00Dec 23, 1994——
00Oct 15, 1993Aug 9, 1993—
00Oct 1, 1993——
00Sep 6, 1990Jun 28, 1990Yes
00Aug 14, 1990——
00Apr 11, 1989Mar 2, 1989Yes
00Mar 30, 1989——
00Jan 12, 1984Jun 25, 1982—

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.

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Injection

514K
bbl, last 12 reported months
2.52M
bbl, all reported
Dec 2025
reported through
UICKindStatusPermitted bbl/dMax psiZone ft
000093542W-14 DisposalActive6,0007502,640–5,500

MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS

Last 12 months 513,723 · prior 12 540,873(-5%)

050K100K20242025

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/32131225, documented in the API reference.