WELL · 42-321-30908 · DISTRICT 3
State Tract 171 #4
Matagorda County · Matagorda Bay S (Miocene 4100) field · Vertical
State Tract 171 #4 (API 42-321-30908) is a plugged well in Matagorda County, plugged August 2, 2018, last operated by Chaparral Energy L.L.C..
The RRC has issued 2 drilling permits between 1979 and 2001, permitted to 4,800 ft.
It was permitted by Main Energy, Inc. and has since transferred to Chaparral Energy L.L.C. on the wellbore schedule.
Completion filings report one formation top, including Miocene (undifferentiated).
Operator of record
Permitted by Main Energy, Inc.; the EWA schedule now lists a different operator.
Oklahoma City, OK · P-5 Y, filed Nov 4, 2025 · 443 permits on file · (866) 478-8770
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Chaparral Energy L.L.C. |
| Production reports | Chaparral Energy, L.L.C.through Aug 2010 |
| Latest permit | Main Energy, Inc.Mar 30, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,800
- total depth, ft
- 2
- permits on file
- Mar 30, 2001
- last permit issued
- Apr 27, 1979
- completed
- 0
- cumulative oil, bbl
- 141K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Aug 2018
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 27, 1979
- Shut in
- —
- Plugged
- Aug 2, 2018
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| State Tract 171 G-3-82373 | Matagorda Bay, S (Miocene 4100) | Chaparral Energy, L.L.C. | 1 | 0 | 0 | Jan 1993 – Aug 2018 |
| State Tract 171 G-3-186606 | Matagorda Bay, S (Miocene 2800) | Chaparral Energy, L.L.C. | 1 | 0 | 141K | Apr 2001 – Aug 2018 |
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.
- 1Main Energy, Inc.Apr 2001 → Feb 2008
- 2Chaparral Energy, L.L.C.Mar 2008 → Aug 2010
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 506976-99 | Recompletion | Main Energy, Inc. | Mar 26, 2001 | Mar 30, 2001 | Mar 8, 2001 | 3,600 |
| 43946-99 | Drill | Enserch Exploration, Inc | Mar 8, 1979 | Mar 8, 1979 | — | 4,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-82373 | — | — | — | — |
| — | — G-3-186606 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 31 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE | 2,800 | -2,769 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,784 | 2,789 | Perforated |
| 4,040 | 4,046 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 16 | 87 | — | — |
| 8.625 | 1,030 | 12.25 | 560 S |
| 8.625 | 1,030 | — | 560 S |
| 2.375 | 3,975 | — | — |
| 4.5 | 4,657 | 7.875 | 680 S |
| 4.5 | 4,657 | — | 680 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 | Feb 11, 2002 | Oct 31, 2001 | Yes |
| 00 | Jan 31, 2002 | — | — |
| 00 | Jan 12, 1984 | May 31, 1979 | — |
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 42-321-30908 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-321-30908 → 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/32130908, documented in the API reference.