TEXAS · WELLS · FRIO COUNTY · ZRZAVY UNIT LEASE · API 42-163-33786 · DISTRICT 01
Zrzavy Unit #4H
Frio County · Briscoe Ranch (Eagleford) field · Shut In · Horizontal
Zrzavy Unit #4H (API 42-163-33786) is a horizontal well in Frio County operated by Javelin Energy Partners Mgmt LLC, completed December 8, 2014 and listed as shut in on the RRC schedule, shut in December 1, 2022.
The RRC has issued one drilling permit, issued November 15, 2013, permitted to 8,300 ft.
It was permitted by Cabot Oil & Gas Corporation and has since transferred to Javelin Energy Partners Mgmt LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Queen City, Escondido, Navarro, Olmos.
Its lease has reported 2.53M barrels of oil and 818K mcf of gas since April 2014, last reporting volume in March 2026. The lease carries 9 wells, so these are lease totals, not this well alone.
Operator of record
Javelin Energy Partners Mgmt LLC
Permitted by Cabot Oil & Gas Corporation; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 24, 2026
- Permits on file
- 234
- Phone
- (469) 575-3800
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Javelin Energy Partners Mgmt LLC |
| Production reports | Javelin Energy Partners Mgmt LLCthrough Mar 2026 |
| Latest permit | Cabot Oil & Gas CorporationNov 15, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,300
- total depth, ft
- 1
- permits on file
- Nov 15, 2013
- last permit issued
- Dec 8, 2014
- completed
- 2.53M
- cumulative oil, bbl
- 818K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2014 THROUGH Mar 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 8, 2014
- Shut in
- Dec 1, 2022
- 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; they carry 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Zrzavy Unit O-1-18191 | Briscoe Ranch (Eagleford) | Javelin Energy Partners Mgmt LLC | 9 | 2.53M | 818K | Apr 2014 – Mar 2026 |
Oil, barrels lease total
Last 12 months 22,352 · prior 12 36,606(-39%)
Gas, mcf lease total
Last 12 months 12,067 · prior 12 19,018(-37%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cabot Oil & Gas CorporationApr 2014 → Jan 2018
- 2Venado Operating Company LLCFeb 2018 → Mar 2022
- 3Javelin Energy Partners Mgmt LLCApr 2022 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 773204-99 | Drill | Cabot Oil & Gas Corporation | Nov 5, 2013 | Nov 15, 2013 | Aug 17, 2014 | 18,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 8, 2014 | Zrzavy Unit O-1-18191 | Briscoe Ranch (Eagleford) | Javelin Energy Partners Mgmt LLC | Shut In · shut in Dec 1, 2022 | 8,300 |
Formation tops
As filed on W-2/G-1. Subsea from 495 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 1,494 | -999 |
| Escondido | 4,888 | -4,393 |
| Navarro | 5,109 | -4,614 |
| Olmos | 6,143 | -5,648 |
| Anacacho | 7,432 | -6,937 |
| Austin ChalkAUSTIN CHALK - H2S | 7,987 | -7,492 |
| Eagle FordEAGLE FORD - H2S | 8,258 | -7,763 |
| BudaBUDA - H2S | — | — |
| GeorgetownGEORGETOWN - H2S | — | — |
| Pearsall | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,460 | 17,571 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 3,065 | 13.5 | 1,438 S |
| 5.5 | 17,659 | 8.75 | 3,374 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 11, 2015 | Feb 16, 2015 | Yes |
Well logs
2 logs loaded from the RRC's log index, the latest received Nov 1, 2017. 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 |
|---|---|---|---|---|
| RESISTIVITYSpans Queen City, Escondido, Navarro, Olmos, Anacacho, Austin Chalk, Eagle Ford | TIFF | 4,350 to 17,925 | Nov 1, 2017run Oct 16, 2014 | 1.85 |
| RESISTIVITYSpans Queen City, Escondido, Navarro, Olmos, Anacacho, Austin Chalk, Eagle Ford | TIFF | 3,070 to 17,700 | Nov 1, 2017run Sep 30, 2014 | 1.98 |
"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 42-163-33786 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-163-33786 → 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/16333786, documented in the API reference.