TEXAS · WELLS · GAINES COUNTY · CENTRAL ROBERTSON CLEARFORK UNIT LEASE · API 42-165-31854 · DISTRICT 7B
Central Robertson Clearfork Unit #31
Gaines County · Robertson N. (Clear Fork 7100) field · Injection · Vertical
- Fields on the latest permit · any of 2
- Robertson, N. (Clear Fork 7100) · Robertson, N. (San Andres)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Central Robertson Clearfork Unit #31 (API 42-165-31854) is a well in Gaines County operated by Hilcorp Energy Company, completed October 13, 2013 and listed as injection on the RRC schedule.
The RRC has issued one drilling permit, issued August 22, 1980, permitted to 7,200 ft.
It was permitted by Shell Oil Company and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 8 formation tops, including Rustler, Yates, Queen, Grayburg.
Its lease has reported 19.6M barrels of oil and 7.81M mcf of gas since the record begins in January 1993, last reporting volume in April 2026. The lease carries 154 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 26.4K barrels injected in the 12 months reported through October 2025.
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 CompanyAug 22, 1980 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,200
- total depth, ft
- 1
- permits on file
- Aug 22, 1980
- last permit issued
- Oct 13, 2013
- completed
- 19.6M
- cumulative oil, bbl
- 7.81M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH APR 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 13, 2013
- Shut in
- —
- 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 154 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Central Robertson Clearfork Unit O-11-65590 | Robertson, N. (Clear Fork 7100) | Occidental Permian EOR, LLC | 154 | 19.6M | 7.81M | by Jan 1993 – Apr 2026 |
Oil, barrels lease total
Last 12 months 137,440 · prior 12 139,511(-1%)
Gas, mcf lease total
Last 12 months 49,240 · prior 12 64,813(-24%)
Wells named Central Robertson Clearfork Unit
Hilcorp Energy Company's other wells filed under this lease name in Gaines 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.
- 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 |
|---|---|---|---|---|---|---|
| 90658-99 | Drill | Shell Oil Company | Aug 22, 1980 | Aug 22, 1980 | Sep 19, 1980 | 7,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 13, 2013 | Central Robertson Clearfork Unit O-11-65590 | Robertson N. (Clear Fork 7100) | Hilcorp Energy Company | Injection | 7,200 |
| Jan 13, 1981 | Stark T. O. O-11-62662 | Robertson N. (Clear Fork 7100) | Shell Western E&P Inc. | Not on Schedule | — |
| Jan 13, 1981 | Central Robertson Clearfork Unit O-11-65590 | Robertson N. (Clear Fork 7100) | Hilcorp Energy Company | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,317 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rustler | 1,758 | 1,559 |
| Yates | 2,825 | 492 |
| Queen | 3,345 | -28 |
| Grayburg | 4,083 | -766 |
| San Andres | 4,377 | -1,060 |
| Glorieta | 5,782 | -2,465 |
| Clear ForkUPPER CLEARFORK | 6,341 | -3,024 |
| Clear ForkUPPER CLEARFORK | 6,358 | -3,041 |
| Tubb | 6,959 | -3,642 |
| Tubb | 6,984 | -3,667 |
| Clear ForkLOWER CLEARFORK | 7,070 | -3,753 |
| Clear ForkLOWER CLEARFORK | 7,071 | -3,754 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,816 | 7,162 | Perforated |
| 5,940 | 7,062 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 40 | 17.5 | 200 S |
| 8.625 | 1,800 | 12.25 | 850 S |
| 8.625 | 1,824 | 12.25 | 850 S |
| 2.875 | 7,093 | — | — |
| 5.5 | 7,193 | 7.875 | 1,100 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 | May 27, 2022 | Feb 14, 2022 | — |
| 00 | Aug 24, 2001 | Dec 2, 1999 | — |
| 00 | Jul 19, 2001 | Feb 27, 1981 | — |
| 00 | Dec 12, 1985 | Feb 27, 1981 | — |
| 00 | Dec 4, 1985 | — | — |
| 00 | Jan 12, 1984 | Feb 27, 1981 | — |
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 42-165-31854 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-165-31854 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 26.4K
- bbl, last 12 reported months
- 2.5M
- bbl, all reported
- Oct 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000081933 | H-1 Injection | Active | 1,000 | 2,000 | 5,816–7,200 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 26,372 · prior 12 38,128(-31%)
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/16531854, documented in the API reference.