TEXAS · WELLS · GAINES COUNTY · ROBERTSON (SAN ANDRES) UNIT LEASE · API 42-165-31171 · DISTRICT 7B
Robertson (San Andres) Unit #23
Gaines County · Robertson N. (San Andres) field · Shut In · Vertical
Robertson (San Andres) Unit #23 (API 42-165-31171) is a well in Gaines County operated by Hilcorp Energy Company, completed October 4, 2002 and listed as shut in on the RRC schedule, shut in January 1, 2004.
The RRC has issued one drilling permit, issued July 5, 1977, permitted to 4,735 ft.
It was permitted by Shell Oil Company and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 4 formation tops, including Yates, Seven Rivers, Queen, San Andres.
Its lease has reported 4.68M barrels of oil and 1.65M mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 73 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Shell Oil Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,458
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Occidental Permian EOR, LLCthrough Apr 2026 |
| Latest permit | Shell Oil CompanyJul 5, 1977 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,735
- total depth, ft
- 1
- permits on file
- Jul 5, 1977
- last permit issued
- Oct 4, 2002
- completed
- 4.68M
- cumulative oil, bbl
- 1.65M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 4, 2002
- Shut in
- Jan 1, 2004
- 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.
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 73 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Robertson (San Andres) Unit O-11-66037 | Robertson, N. (San Andres) | Occidental Permian EOR, LLC | 73 | 4.68M | 1.65M | Jan 1993 – Apr 2026 |
Oil, barrels lease total
Last 12 months 28,531 · prior 12 26,404(+8%)
Gas, mcf lease total
Last 12 months 6,943 · prior 12 8,905(-22%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Shell Western E&P Inc.Jan 1993 → Feb 1997
- 2Altura Energy Ltd.Mar 1997 → Apr 2000
- 3Occidental Permian Ltd.May 2000 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 2341-99 | Drill | Shell Oil Company | Jul 5, 1977 | Jul 5, 1977 | — | 4,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 4, 2002 | Robertson (San Andres) Unit O-11-66037 | Robertson N. (San Andres) | Hilcorp Energy Company | Shut In · shut in Jan 1, 2004 | 4,735 |
| Feb 10, 1979 | Stark T. O. G-11-84068 | Newsom (Yates) | Shell Western E&P Inc. | Not on Schedule | — |
| Aug 1, 1977 | Stark T. O. O-11-61754 | Robertson N. (San Andres) | Shell Western E&P Inc. | Not on Schedule | — |
| Aug 1, 1977 | Stark T. O. O-11-61754 | Robertson N. (San Andres) | Shell Western E&P Inc. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,322 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,827 | 495 |
| Seven Rivers | 3,046 | 276 |
| Queen | 3,346 | -24 |
| San Andres | 4,372 | -1,050 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,830 | 2,992 | Perforated |
| 4,613 | 4,702 | Perforated |
| — | 4,702 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,743 | 12.25 | 650 S |
| 7 | 4,735 | 8.75 | 1,350 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 | Mar 21, 2005 | Apr 22, 2003 | — |
| 00 | Sep 19, 1990 | Sep 5, 1990 | — |
| 00 | Sep 18, 1990 | — | — |
| 00 | Sep 12, 1987 | — | — |
| 00 | Jan 12, 1984 | Sep 20, 1979 | — |
| 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 42-165-31171 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-165-31171 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its 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/16531171, documented in the API reference.