WELL · 42-321-00630 · DISTRICT 3
Robertson W. T. #1
Matagorda County · Sugar Valley (8100) field · Vertical
Robertson W. T. #1 (API 42-321-00630) is a plugged well in Matagorda County, plugged October 1, 2008, last operated by Chaparral Energy L.L.C..
The RRC has issued 2 drilling permits (amended twice) between 1994 and 1997, permitted to 9,200 ft.
It was permitted by Houston Hydrocarbons, Inc. (A) and has since transferred to Chaparral Energy L.L.C. on the wellbore schedule.
Completion filings report 3 formation tops, including Struma, Boutte, Grant.
Its 4 leases have reported 30K barrels of oil and 239K mcf of gas since January 1993, last reporting in July 2026. The leases carry 6 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Houston Hydrocarbons, Inc. (A); 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 Jan 2006 |
| Latest permit | Houston Hydrocarbons, Inc. (A)Jul 30, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,200
- total depth, ft
- 4
- permits on file
- Jul 30, 1997
- last permit issued
- Jul 21, 1997
- completed
- 30K
- cumulative oil, bbl
- 239K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 21, 1997
- Shut in
- —
- Plugged
- Oct 1, 2008
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 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Robertson, W. T. O-3-8172 | Sugar Valley (Talcott) | Oak Energy, LLC | 3 | 3.5K | 9.53K | Jan 1993 – Jul 2026 |
| Robertson, W. T. O-3-23305 | Sugar Valley (8100) | Chaparral Energy, L.L.C. | 1 | 13.4K | 20.6K | Jul 1997 – Mar 2009 |
| Robertson, W. T. G-3-153021 | Sugar Valley (Boutte 8550) | Houston Hydrocarbons, Inc. (A) | 1 | 0 | 182K | Jan 1995 – Sep 1998 |
| Robertson, W.T. O-3-10526 | Sugar Valley (Grant) | Houston Hydrocarbons, Inc. (A) | 1 | 13K | 27.5K | Jan 1993 – Mar 1995 |
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.
- 1Texaco E & P Inc.Jan 1993 → Feb 1994
- 2Houston Hydrocarbons, Inc. (A)Mar 1994 → Oct 1999
- 3Bison Energy Partners, Inc.Nov 1999 → Aug 2001
- 4Bison Energy Partners, Ltd.Sep 2001 → Apr 2002
- 5White Oak Operating Company LLCMay 2002 → Mar 2004
- 6Opex Energy, LLCNov 2004 → Jan 2005
- 7Chaparral Energy, L.L.C.Jan 2006 → Jan 2006
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 465655-99 | Recompletion | Houston Hydrocarbons, Inc. (A) | Jul 30, 1997 | Jul 30, 1997 | Jun 29, 1997 | 8,200 |
| 429998-97 | Recompletion | Houston Hydrocarbons, Inc. (A) | Nov 14, 1994 | Dec 7, 1994 | Jan 23, 1995 | 9,200 |
| 429998-98 | Recompletion | Houston Hydrocarbons, Inc. (A) | Nov 14, 1994 | Dec 7, 1994 | — | 9,200 |
| 429998-99 | Recompletion | Houston Hydrocarbons, Inc. (A) | Nov 14, 1994 | Dec 7, 1994 | — | 9,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-153021 | — | — | — | — |
| — | — O-3-8172 | — | — | — | — |
| — | — O-3-10526 | — | — | — | — |
| — | — O-3-23305 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 52 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Struma | 8,450 | -8,398 |
| Boutte | 8,530 | -8,478 |
| Grant | 8,750 | -8,698 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,050 | 8,052 | Perforated |
| 8,530 | 8,534 | Perforated |
| 8,749 | 8,753 | Perforated |
| 8,749 | 8,831 | Perforated |
| 8,778 | 8,782 | Perforated |
| 8,828 | 8,831 | Perforated |
| — | 8,596 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,427 | — | 890 S |
| 10.75 | 1,437 | — | 890 S |
| 2.375 | 8,574 | — | — |
| 2 | 8,815 | — | — |
| 5.5 | 9,127 | — | 850 S |
| 5.5 | 9,138 | — | 850 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 | Oct 13, 1997 | Aug 3, 1997 | Yes |
| 00 | Oct 1, 1997 | — | — |
| 00 | Mar 20, 1995 | Feb 17, 1995 | Yes |
| 00 | Mar 6, 1995 | — | — |
| 00 | Jun 27, 1990 | Jun 20, 1990 | — |
| 00 | Jan 12, 1984 | Jan 28, 1981 | — |
| 00 | Jan 12, 1984 | Oct 2, 1973 | — |
| 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 42-321-00630 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-321-00630 → 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/32100630, documented in the API reference.