TEXAS · WELLS · ZAPATA COUNTY · KING B LEASE · API 42-505-33906 · DISTRICT 04
King B #4
Zapata County · La Perla (Lobo Cons.) field · Producing · Vertical
King B #4 (API 42-505-33906) is a well in Zapata County operated by Hilcorp Energy Company, completed May 10, 1999 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued February 24, 1999, permitted to 9,020 ft.
It was permitted by Conoco Inc. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report one formation top, including Wilcox.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Conoco 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 | Conoco Inc.Feb 24, 1999 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,020
- total depth, ft
- 2
- permits on file
- Feb 24, 1999
- last permit issued
- May 10, 1999
- completed
- 0
- cumulative oil, bbl
- 1.53M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 1999 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 10, 1999
- 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 lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| King B G-4-173320 | La Perla (Lobo Cons.) | Hilcorp Energy Company | 1 | 0 | 1.53M | May 1999 – Jul 2026 |
Gas, mcf lease total
Last 12 months 10,657 · prior 12 8,945(+19%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Conoco Inc.May 1999 → Dec 2002
- 2Conocophillips CompanyJan 2003 → Dec 2015
- 3Hilcorp Energy CompanyJan 2016 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 482930-98 | Drill | Conoco Inc. | May 28, 1999 | Feb 24, 1999 | Mar 7, 1999 | 9,750 |
| 482930-99 | Drill | Conoco Inc. | Feb 24, 1999 | Feb 24, 1999 | — | 9,750 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 10, 1999 | King B G-4-173320 | La Perla (Lobo Cons.) | Hilcorp Energy Company | Producing | 9,020 |
Formation tops
As filed on W-2/G-1. Subsea from 346 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| WilcoxBASE OF LOWER WILCOX | 6,290 | -5,944 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,518 | 8,675 | Perforated |
| 8,836 | 8,856 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 539 | 12.25 | 215 S |
| 7 | 5,813 | 8.75 | 245 S |
| 4.5 | 9,016 | 6.25 | 580 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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jul 13, 1999 | May 28, 1999 | Yes |
| 00 | Jul 2, 1999 | — | — |
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 42-505-33906 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-33906 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their 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/50533906, documented in the API reference.