TEXAS · WELLS · POLK COUNTY · BLACK STONE BROWN BEAR UNIT LEASE · API 42-373-31147 · DISTRICT 03
Black Stone Brown Bear Unit #1H
Polk County · Double a Wells N (Austin Chalk) field · Producing · Horizontal
Black Stone Brown Bear Unit #1H (API 42-373-31147) is a horizontal well in Polk County operated by Zarvona Energy LLC, completed August 16, 2009 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 10, 2008, permitted to 13,857 ft.
It was permitted by Bbx Operating, L.L.C. and has since transferred to Zarvona Energy LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Saratoga, Anacacho, Austin Chalk.
Its lease has reported 72.9K barrels of oil and 949K mcf of gas since August 2009, last reporting volume in April 2026.
Operator of record
Permitted by BBX Operating, L.L.C.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jun 2, 2026
- Permits on file
- 98
- Phone
- (713) 600-0600
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Zarvona Energy LLC |
| Production reports | Zarvona Energy LLCthrough Apr 2026 |
| Latest permit | BBX Operating, L.L.C.Dec 10, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,857
- total depth, ft
- 2
- permits on file
- Dec 10, 2008
- last permit issued
- Aug 16, 2009
- completed
- 72.9K
- cumulative oil, bbl
- 949K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2009 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 16, 2009
- 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 |
|---|---|---|---|---|---|---|
| Black Stone Brown Bear Unit G-3-257937 | Double a Wells, N (Austin Chalk) | Zarvona Energy LLC | 1 | 72.9K | 949K | Aug 2009 – Apr 2026 |
Gas, mcf lease total
Last 12 months 52,881 · prior 12 54,286(-3%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1BBX Operating, L.L.C.Aug 2009 → Oct 2017
- 2Zarvona Energy LLCNov 2017 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 675901-98 | Drill | BBX Operating, L.L.C. | Jul 22, 2010 | Dec 10, 2008 | Jan 7, 2009 | 14,000 |
| 675901-99 | Drill | BBX Operating, L.L.C. | Dec 5, 2008 | Dec 10, 2008 | Jan 7, 2009 | 14,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 16, 2009 | Black Stone Brown Bear Unit G-3-257937 | Double a Wells N (Austin Chalk) | Zarvona Energy LLC | Producing | 13,857 |
Formation tops
As filed on W-2/G-1. Subsea from 370 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Saratoga | 12,240 | -11,870 |
| Anacacho | 13,250 | -12,880 |
| Austin Chalk | 13,375 | -13,005 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 13,907 | 16,370 | Perforated |
| 13,907 | 17,050 | Perforated |
| 13,907 | 17,291 | Perforated |
| 14,985 | 15,928 | Perforated |
| 14,985 | 16,419 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 2,520 | 14.75 | 1,474 S |
| 7.625 | 13,280 | 9.875 | 900 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 6, 2010 | Mar 16, 2010 | Yes |
| 00 | Nov 10, 2010 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Mar 28, 2012. 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 Austin Chalk | TIFF | 13,677 to 15,281 | Mar 28, 2012run Mar 6, 2009 | 0.35 |
"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 42-373-31147 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-373-31147 → 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/37331147, documented in the API reference.