TEXAS · WELLS · ZAPATA COUNTY · API 42-505-34086 · DISTRICT 04
Haynes #21
Zapata County · Haynes (Hinnant Cons.) field · Producing · Directional
Haynes #21 (API 42-505-34086) is a well in Zapata County operated by Hilcorp Energy Company, completed February 23, 2007 and listed as producing on the RRC schedule.
The RRC has issued 3 drilling permits (amended once) between 2000 and 2007, permitted to 14,280 ft.
It was permitted by Chesapeake Operating, Inc. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 4 formation tops, including Crockett, Queen City, Wilcox, 10,800.
Its 2 leases have reported 58 barrels of oil and 1M mcf of gas since June 2000, last reporting volume in 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
- 3,454
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | Chesapeake Operating, Inc.Jan 24, 2007 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 14,280
- total depth, ft
- 4
- permits on file
- Jan 24, 2007
- last permit issued
- Feb 23, 2007
- completed
- 58
- cumulative oil, bbl
- 1M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2000 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 23, 2007
- 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.
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 |
|---|---|---|---|---|---|---|
| Haynes G-4-226643 | Haynes (Hinnant Cons.) | Hilcorp Energy Company | 1 | 57 | 619K | Feb 2007 – Apr 2026 |
| Haynes G-4-179618 | EN Seguido (Wilcox) | Hilcorp Energy Company | 1 | 1 | 385K | Jun 2000 – Oct 2006 |
Gas, mcf lease total
Last 12 months 6,485 · prior 12 5,394(+20%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Production Co, L.P.Jun 2000 → Jan 2004
- 2Chesapeake Operating, Inc.Aug 2005 → Aug 2014
- 3Hilcorp Energy CompanySep 2014 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 632214-99 | Recompletion | Chesapeake Operating, Inc. | Jan 19, 2007 | Jan 24, 2007 | Feb 10, 2007 | 12,500 |
| 539088-99 | Drill | Devon Energy Production Co, L.P. | Dec 1, 2003 | Dec 1, 2003 | — | 11,900 |
| 492110-98 | Drill | Devon Energy Production Co, L.P. | Oct 20, 2000 | Feb 15, 2000 | Feb 15, 2000 | 14,000 |
| 492110-99 | Drill | Union Pacific Resources Company | Feb 15, 2000 | Feb 15, 2000 | — | 14,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 23, 2007 | Haynes G-4-226643 | Haynes (Hinnant Cons.) | Hilcorp Energy Company | Producing | 14,280 |
| Jun 20, 2000 | Haynes G-4-179618 | EN Seguido (Wilcox) | Hilcorp Energy Company | Partial Plug · shut in Oct 1, 2006 | 14,280 |
Formation tops
As filed on W-2/G-1. Subsea from 452 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Crockett | 2,675 | -2,223 |
| Queen City | 3,470 | -3,018 |
| Queen CityBASAL QUEEN CITY | 4,995 | -4,543 |
| WilcoxTOP OF WILCOX | 6,520 | -6,068 |
| 10,800 | 10,524 | -10,072 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,288 | 12,576 | Perforated |
| 12,542 | 12,576 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 944 | 17.5 | 910 S |
| 7.625 | 7,772 | 9.625 | 150 S |
| 9.625 | 8,000 | 12.25 | 685 S |
| 7.625 | 10,626 | 7.625 | — |
| 3.5 | 10,626 | 7.625 | — |
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 23, 2007 | Apr 27, 2007 | — |
| 00 | May 16, 2007 | — | — |
| 00 | Jan 2, 2001 | Jul 21, 2000 | Yes |
| 00 | Nov 27, 2000 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Aug 22, 2008. 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 10,800 | TIFF | 10,894 to 12,960 | Aug 22, 2008run Apr 20, 2000 | 2.78 |
"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 42-505-34086 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-34086 → 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/50534086, documented in the API reference.