TEXAS · WELLS · MATAGORDA COUNTY · OHIO-SUN UNIT LEASE · API 42-321-01612 · DISTRICT 03
Ohio-Sun Unit #4A
Matagorda County · Markham N.-Bay City N (Carlson) field · Shut In · Vertical
Ohio-Sun Unit #4A (API 42-321-01612) is a well in Matagorda County operated by Goldking Minerals Mgmt L.L.C., completed August 24, 1987 and listed as shut in on the RRC schedule, shut in January 1, 1999.
The RRC has issued 3 drilling permits between 1984 and 1987, permitted to 8,114 ft.
It was permitted by Marathon Oil Company and has since transferred to Goldking Minerals Mgmt L.L.C. on the wellbore schedule.
Completion filings report 3 formation tops, including Miocene (undifferentiated), Anahuac, Frio.
Its lease has reported 223K barrels of oil and 362K mcf of gas since the record begins in January 1993, last reporting volume in January 2025. The lease carries 21 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Marathon Oil Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 10, 2026
- Permits on file
- 1
- Phone
- (713) 228-5464
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Goldking Minerals Mgmt L.L.C. |
| Production reports | Allegiant Resources, LLCthrough Jan 2025 |
| Latest permit | Marathon Oil CompanyAug 13, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,114
- total depth, ft
- 3
- permits on file
- Aug 13, 1987
- last permit issued
- Aug 24, 1987
- completed
- 223K
- cumulative oil, bbl
- 362K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH JAN 2025
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 24, 1987
- Shut in
- Jan 1, 1999
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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; they carry 21 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Ohio-Sun Unit O-3-2996 | Markham N.-Bay City, N (Carlson) | Allegiant Resources, LLC | 21 | 223K | 362K | by Jan 1993 – Jan 2025 |
Oil, barrels lease total
Last 12 months 0 · prior 12 203(-100%)
Wells named Ohio-Sun Unit
Goldking Minerals Mgmt L.L.C.'s other wells filed under this lease name in Matagorda County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain 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
- 4Remora Management, LLCNov 2016 → Jul 2019
- 5Allegiant Resources, LLCAug 2019 → Jan 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 334262-99 | Recompletion | Marathon Oil Company | Aug 10, 1987 | Aug 13, 1987 | — | 7,980 |
| 247113-99 | Recompletion | Marathon Oil Company | Aug 1, 1984 | Aug 1, 1984 | — | 7,980 |
| 236077-99 | Recompletion | Marathon Oil Company | Apr 18, 1984 | Apr 18, 1984 | — | 7,980 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 24, 1987 | Ohio-Sun Unit O-3-2996 | Markham N.-Bay City N (Carlson) | Goldking Minerals Mgmt L.L.C. | Shut In · shut in Jan 1, 1999 | 8,114 |
| Aug 24, 1987 | Ohio-Sun Unit O-3-2996 | Markham N.-Bay City N (Carlson) | Goldking Minerals Mgmt L.L.C. | Shut In · shut in Jan 1, 1999 | 8,114 |
| Sep 12, 1984 | Ohio-Sun Unit G-3-113590 | Markham N-Bay City N(CHOATE7100) | Marathon Oil Company | Not on Schedule | — |
| — | Ohio-Sun Unit O-3-2998 | Markham N.-Bay City N(cornelius) | Goldking Minerals Mgmt L.L.C. | Not on Schedule | — |
| — | Ohio-Sun Unit O-3-2998 | Markham N.-Bay City N(cornelius) | Goldking Minerals Mgmt L.L.C. | Not on Schedule | — |
| — | Ohio-Sun Unit O-3-2996 | Markham N.-Bay City N (Carlson) | Goldking Minerals Mgmt L.L.C. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 72 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 2,500 | -2,428 |
| Anahuac | 5,500 | -5,428 |
| Frio | 6,900 | -6,828 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,937 | 6,950 | Perforated |
| 6,948 | 6,951 | Perforated |
| 6,956 | — | Perforated |
| 7,123 | 7,126 | Perforated |
| 7,682 | 7,687 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,514 | 15 | 800 S |
| 10.375 | 1,570 | 15 | 800 S |
| 2.375 | 6,903 | — | — |
| 5.5 | 7,970 | 9.875 | 1,000 S |
| 5.5 | 8,114 | 9.875 | 1,000 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Oct 2, 1987 | Sep 10, 1987 | Yes |
| 00 | Dec 6, 1984 | Nov 19, 1984 | — |
| 00 | Dec 1, 1984 | Nov 5, 1984 | — |
| 00 | Aug 14, 1984 | Jul 26, 1984 | — |
| 00 | Jan 12, 1984 | Jul 26, 1984 | — |
| 00 | Jan 12, 1984 | May 24, 1968 | — |
| 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 42-321-01612 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-321-01612 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.
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/32101612, documented in the API reference.