TEXAS · WELLS · WEBB COUNTY · API 42-479-36004 · DISTRICT 04
Vaquillas Ranch A4 #121
Webb County · Vaquillas Ranch (Lobo Cons.) field · Producing · Vertical
- Permitted field
- Vaquillas Ranch (Yarsa)
Vaquillas Ranch A4 #121 (API 42-479-36004) is a well in Webb County operated by Hilcorp Energy Company, completed February 19, 2001 and listed as producing on the RRC schedule.
The RRC has issued 2 drilling permits between 1994 and 1997, permitted to 12,223 ft.
It was permitted by Conoco Inc. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 6 formation tops, including Queen City, Carrizo, Wilcox, Base Of Lwr. Wilcox.
Its 2 leases have reported 12.3K barrels of oil and 1.82M mcf of gas since April 1994, last reporting volume in August 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Conoco Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- 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 | Hilcorp Energy Companythrough Aug 2026 |
| Latest permit | Conoco Inc.Apr 11, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,223
- total depth, ft
- 2
- permits on file
- Apr 11, 1997
- last permit issued
- Feb 19, 2001
- completed
- 12.3K
- cumulative oil, bbl
- 1.82M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · APR 1994 THROUGH AUG 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 19, 2001
- 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 AUG 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 |
|---|---|---|---|---|---|---|
| Vaquillas Ranch A4 G-4-162429 | Vaquillas Ranch (Lobo Cons.) | Hilcorp Energy Company | 1 | 9.6K | 1.34M | Mar 1997 – Aug 2026 |
| Vaquillas Ranch A4 G-4-150638 | Vaquillas Ranch (Wilcox 11,900) | Conoco Inc. | 1 | 2.7K | 482K | Apr 1994 – Feb 1997 |
Gas, mcf lease total
Last 12 months 27,088 · prior 12 35,647(-24%)
Wells named Vaquillas Ranch A4
Hilcorp Energy Company's other wells filed under this lease name in Webb 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.
- 1Conoco Inc.Apr 1994 → Dec 2002
- 2Conocophillips CompanyJan 2003 → Dec 2010
- 3Hilcorp Energy CompanySep 2019 → Aug 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 460911-99 | Recompletion | Conoco Inc. | Apr 9, 1997 | Apr 11, 1997 | Feb 13, 1997 | 12,223 |
| 419859-99 | Drill | Conoco Inc. | Jan 4, 1994 | Jan 4, 1994 | Jan 19, 1994 | 12,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 19, 2001 | Vaquillas Ranch A4 G-4-162429 | Vaquillas Ranch (Lobo Cons.) | Hilcorp Energy Company | Producing | 12,223 |
| Apr 19, 1994 | Vaquillas Ranch A4 G-4-150638 | Vaquillas Ranch (Lobo Cons.) | Conoco Inc. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 652 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 3,986 | -3,334 |
| CarrizoCARRIZO WILCOX | 6,286 | -5,634 |
| WilcoxBASE OF LOWER WILCOX | 10,543 | -9,891 |
| Base of Lwr. Wilcox | 10,543 | -9,891 |
| Lobo Unconformity | 10,543 | -9,891 |
| Wills Point | 12,164 | -11,512 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,964 | 10,994 | Perforated |
| 11,218 | 11,222 | Perforated |
| 11,218 | 11,276 | Perforated |
| 11,266 | 11,276 | Perforated |
| 12,002 | 12,030 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 522 | 12.25 | 225 S |
| 7 | 8,816 | 9.875 | 225 S |
| 5 | 12,219 | 6.25 | 250 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 | Jun 14, 2010 | Jun 8, 2010 | — |
| 00 | Apr 28, 1998 | Apr 6, 1998 | — |
| 00 | Apr 21, 1997 | Apr 9, 1997 | Yes |
| 00 | Apr 15, 1997 | — | — |
| 00 | Oct 4, 1994 | May 4, 1994 | Yes |
| 00 | Aug 30, 1994 | — | — |
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 42-479-36004 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-479-36004 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.
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/47936004, documented in the API reference.