WELL · 42-177-31863 · DISTRICT 1
Hart Oil Unit #1
Gonzales County · Peach Creek (Austin Chalk) field · Horizontal
Hart Oil Unit #1 (API 42-177-31863) is a plugged horizontal well in Gonzales County, plugged November 16, 2016, last operated by Express Oil CO..
The RRC has issued one drilling permit, issued January 14, 1991, permitted to 11,000 ft.
It was permitted by Tana Oil And Gas Corporation and has since transferred to Express Oil CO. on the wellbore schedule.
Completion filings report 4 formation tops, including Navarro, Taylor, Anacacho, Austin Chalk.
Its lease has reported 16.4K barrels of oil and 4.1K mcf of gas since January 1993, last reporting in July 2026.
Operator of record
Permitted by Tana Oil and Gas Corporation; the EWA schedule now lists a different operator.
- Based in
- Hallettsville, TX
- P-5 status
- Delinquent (D)
- P-5 last filed
- Jul 30, 2010
- Permits on file
- 47
- Phone
- (361) 798-4031
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Express Oil Co. |
| Production reports | Tana Oil and Gas Corporationthrough Apr 1995 |
| Latest permit | Tana Oil and Gas CorporationJan 14, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,000
- total depth, ft
- 1
- permits on file
- Jan 14, 1991
- last permit issued
- Feb 28, 1991
- completed
- 16.4K
- cumulative oil, bbl
- 4.1K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 28, 1991
- Shut in
- —
- Plugged
- Nov 16, 2016
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 lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Hart Oil Unit O-1-13061 | Peach Creek (Austin Chalk) | Express Oil Co. | 1 | 16.4K | 4.1K | Jan 1993 – Jul 2026 |
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.
- 1Tana Oil and Gas CorporationJan 1993 → Apr 1995
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 383171-99 | Drill | Tana Oil and Gas Corporation | Jan 8, 1991 | Jan 14, 1991 | Jan 23, 1991 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-13061 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 376 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Navarro | 4,550 | -4,174 |
| Taylor | 5,280 | -4,904 |
| Anacacho | 6,460 | -6,084 |
| Austin Chalk | 6,640 | -6,264 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,835 | 7,047 | Perforated |
| 6,879 | 9,918 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 720 | 12.25 | 345 S |
| 7 | 6,630 | 8.75 | 160 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 | Jun 13, 1991 | Apr 5, 1991 | Yes |
| 00 | Jun 5, 1991 | — | — |
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 42-177-31863 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-177-31863 → 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/17731863, documented in the API reference.