TEXAS · WELLS · ZAPATA COUNTY · API 42-505-36111 · DISTRICT 04
Jacoba Villarreal Estate #2
Zapata County · Zapata SE. (Wilcox) field · SWR-10-Well · Vertical
Jacoba Villarreal Estate #2 (API 42-505-36111) is a well in Zapata County operated by Hilcorp Energy Company, completed September 20, 2008 and listed as swr-10-well on the RRC schedule, shut in June 1, 2012.
The RRC has issued one drilling permit, issued February 27, 2008, permitted to 10,350 ft.
It was permitted by Chesapeake Operating, Inc. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Queen City, Big Blue, Lobo Unconformity.
Its 2 leases have reported 302 barrels of oil and 72.4K mcf of gas since April 2008, with no volume in the three years through April 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Chesapeake Operating, Inc.; 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 | Hilcorp Energy Companythrough Jul 2012 |
| Latest permit | Chesapeake Operating, Inc.Feb 27, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,350
- total depth, ft
- 1
- permits on file
- Feb 27, 2008
- last permit issued
- Sep 20, 2008
- completed
- 302
- cumulative oil, bbl
- 72.4K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2008 THROUGH Jul 2012
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 20, 2008
- Shut in
- Jun 1, 2012
- 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 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 |
|---|---|---|---|---|---|---|
| Jacoba Villarreal Estate G-4-238134 | Exsun (Lobo Cons.) | Hilcorp Energy Company | 1 | 302 | 72.4K | Apr 2008 – Jul 2012 |
| Jacoba Villarreal Estate G-4-238170 | Zapata, SE. (Wilcox) | Hilcorp Energy Company | 1 | 0 | 0 | Apr 2008 – — |
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.
- 1Chesapeake Operating, Inc.Apr 2008 → Jul 2012
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 655641-99 | Drill | Chesapeake Operating, Inc. | Feb 19, 2008 | Feb 27, 2008 | Mar 15, 2008 | 14,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 20, 2008 | Jacoba Villarreal Estate G-4-238170 | Zapata SE. (Wilcox) | Hilcorp Energy Company | SWR-10-Well · shut in Apr 1, 2008 | 10,350 |
| Sep 20, 2008 | Jacoba Villarreal Estate G-4-238134 | Exsun (Lobo Cons.) | Hilcorp Energy Company | Temp Abandoned · shut in Jun 1, 2012 | 10,350 |
Formation tops
As filed on W-2/G-1. Subsea from 420 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 1,790 | -1,370 |
| Big Blue | 5,820 | -5,400 |
| Lobo Unconformity | 7,617 | -7,197 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,400 | 9,584 | Perforated |
| 7,782 | 9,584 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 740 | 12.25 | 312 S |
| 7 | 6,186 | 8.75 | 260 S |
| 4.5 | 10,317 | 6.25 | 400 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 | Dec 19, 2008 | Oct 30, 2008 | — |
| 00 | Sep 22, 2008 | May 29, 2008 | — |
| 00 | Sep 11, 2008 | May 19, 2008 | — |
| 00 | Aug 28, 2008 | May 19, 2008 | Yes |
| 00 | Aug 25, 2008 | — | — |
| 00 | Aug 23, 2008 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received May 8, 2009. Density, Neutron, Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| COMBINATION: RESISTIVITY/NEUTRON/DENSITY POROSITYSpans Big Blue, Lobo Unconformity | TIFF | 6,188 to 10,356 | May 8, 2009run Apr 3, 2008 | 0.71 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-505-36111 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-36111 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search 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/50536111, documented in the API reference.