TEXAS · WELLS · LA SALLE COUNTY · MILLETT B UNIT LEASE · API 42-283-35708 · DISTRICT 01
Millett B Unit #41H
La Salle County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Millett B Unit #41H (API 42-283-35708) is a horizontal well in La Salle County operated by Javelin Energy Partners Mgmt LLC, completed November 14, 2017 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued February 3, 2016, permitted to 8,172 ft.
It was permitted by Carrizo (Eagle Ford) LLC and has since transferred to Javelin Energy Partners Mgmt LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Midway, Escondido, Olmos, Austin Chalk.
Its lease has reported 1.17M barrels of oil and 1.88M mcf of gas since October 2015, last reporting volume in March 2026. The lease carries 8 wells, so these are lease totals, not this well alone.
Operator of record
Javelin Energy Partners Mgmt LLC
Permitted by Carrizo (Eagle Ford) LLC; 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 | Carrizo (Eagle Ford) LLCFeb 3, 2016 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,172
- total depth, ft
- 2
- permits on file
- Feb 3, 2016
- last permit issued
- Nov 14, 2017
- completed
- 1.17M
- cumulative oil, bbl
- 1.88M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2016 THROUGH Mar 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 14, 2017
- 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; they carry 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Millett B Unit O-1-18669 | Eagleville (Eagle Ford-1) | Javelin Energy Partners Mgmt LLC | 8 | 1.17M | 1.88M | Oct 2015 – Mar 2026 |
Oil, barrels lease total
Last 12 months 23,834 · prior 12 30,053(-21%)
Gas, mcf lease total
Last 12 months 82,268 · prior 12 108,225(-24%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Carrizo (Eagle Ford) LLCSep 2016 → Jan 2020
- 2Callon (Eagle Ford) LLCFeb 2020 → Jun 2023
- 3Ridgemar Energy Operating, LLCJul 2023 → Jan 2025
- 4Javelin Energy Partners Mgmt LLCFeb 2025 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 813635-98 | Drill | Carrizo (Eagle Ford) LLC | Mar 2, 2017 | Feb 3, 2016 | Jul 28, 2017 | 11,000 |
| 813635-99 | Drill | Carrizo (Eagle Ford) LLC | Feb 2, 2016 | Feb 3, 2016 | Apr 4, 2017 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 14, 2017 | Millett B Unit O-1-18669 | Eagleville (Eagle Ford-1) | Javelin Energy Partners Mgmt LLC | Producing | 8,172 |
Formation tops
As filed on W-2/G-1. Subsea from 512 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Midway | 2,672 | -2,160 |
| Escondido | 4,535 | -4,023 |
| OlmosOLMOS - DISPOSAL | 5,643 | -5,131 |
| Austin Chalk | 7,072 | -6,560 |
| Eagle FordEAGLE FORD - H2S | 7,957 | -7,445 |
| BudaBUDA - H2S | — | — |
| Queen City | — | — |
| Sparta | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
| Yegua | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,322 | 16,666 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,953 | 13.5 | 1,055 S |
| 5.5 | 16,787 | 8.5 | 3,155 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 | May 21, 2018 | Feb 6, 2018 | Yes |
| 00 | Nov 1, 2017 | Aug 25, 2017 | Yes |
Well logs
1 log loaded from the RRC's log index, 1 of it with a digital LAS file, the latest received Apr 30, 2020. Cement bond. 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 |
|---|---|---|---|---|
| Cement BondSpans Midway, Escondido, Olmos, Austin Chalk, Eagle Ford | LAS + TIFF | 100 to 8,274 | Apr 30, 2020 | 73.6 + 7.70 |
"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 42-283-35708 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-283-35708 → 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/28335708, documented in the API reference.