WELL · 42-135-43743 · DISTRICT 8
Millie B Leon B #201H
Ector County · Spraberry (Trend Area) field · Producing · Horizontal
Millie B Leon B #201H (API 42-135-43743) is a horizontal well in Ector County operated by Diamondback E&P LLC, completed August 9, 2020 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 16, 2019, permitted to 9,150 ft.
It was permitted by Firebird Energy LLC and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Santa Rosa, Yates, Seven Rivers, Queen.
Its lease has reported 267K barrels of oil and 222K mcf of gas since August 2020, last reporting in July 2026.
Operator of record
Permitted by Firebird Energy LLC; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,237 permits on file · (855) 247-5920
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Firebird Energy LLCDec 16, 2019 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,150
- total depth, ft
- 2
- permits on file
- Dec 16, 2019
- last permit issued
- Aug 9, 2020
- completed
- 267K
- cumulative oil, bbl
- 222K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2020 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 9, 2020
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
31.654089, -102.333025
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Ector County.
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 |
|---|---|---|---|---|---|---|
| Millie B Leon B O-10-57348 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 267K | 222K | Aug 2020 – Jul 2026 |
Oil, barrels lease total
Last 12 months 19,013 · prior 12 22,188(-14%)
Gas, mcf lease total
Last 12 months 22,989 · prior 12 24,344(-6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Firebird Energy LLCAug 2020 → Nov 2022
- 2Diamondback E&P LLCDec 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 859866-98 | Drill | Firebird Energy LLC | Apr 11, 2022 | Dec 16, 2019 | Jan 13, 2020 | 9,150 |
| 859866-99 | Drill | Firebird Energy LLC | Dec 10, 2019 | Dec 16, 2019 | Jan 13, 2020 | 9,150 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-57348 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,936 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa RosaSANTA ROSA BASE | 1,359 | 1,577 |
| Yates | 3,140 | -204 |
| Seven Rivers | 3,867 | -931 |
| Queen | 4,251 | -1,315 |
| Grayburg | 4,702 | -1,766 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 5,116 | -2,180 |
| Glorieta | 6,120 | -3,184 |
| Clear ForkCLEARFORK | 7,100 | -4,164 |
| Holt | — | — |
| Tubb | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,696 | 19,105 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,194 | 17.5 | 837 S |
| 9.625 | 8,355 | 12.25 | 1,183 S |
| 5.5 | 19,160 | 8.5 | 2,430 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 | Aug 31, 2022 | May 6, 2022 | Yes |
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 42-135-43743 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-43743 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. then paste it into their search.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Millie B Leon A42-135-43742
0.1 KM · Firebird Energy LLC · Section with this well →
| Santa Rosa | 1,357 | 1,579 |
| Yates | 3,140 | -204 |
| Seven Rivers | 3,867 | -931 |
| Queen | 4,251 | -1,315 |
| Grayburg | 4,704 | -1,768 |
| San Andres | 5,114 | -2,178 |
| Clear Fork | 6,118 | -3,182 |
| Glorieta | 7,095 | -4,159 |
10 TOPS · FIRST 8
Millie B42-135-40634
0.1 KM · FDL Operating, LLC · Section with this well →
| Spraberry | 6,426 | -3,494 |
| Clear Fork | 7,872 | -4,940 |
| Wolfcamp | 9,130 | -6,198 |
| Strawn | 11,008 | -8,076 |
Millie B Leon42-135-43613
0.2 KM · FDL Operating, LLC · Section with this well →
| Queen | 4,241 | -1,311 |
| Grayburg | 4,697 | -1,767 |
| San Andres | 5,144 | -2,214 |
| Clear Fork | 6,510 | -3,580 |
| Spraberry | 8,014 | -5,084 |
| Jo Mill | 8,489 | -5,559 |
| Glorieta | — | |
| Holt | — |
12 TOPS · FIRST 8
Millie B Leon42-135-43614
0.2 KM · FDL Operating, LLC · Section with this well →
| Queen | 4,241 | -1,307 |
| Grayburg | 4,498 | -1,564 |
| San Andres | 5,144 | -2,210 |
| Clear Fork | 6,510 | -3,576 |
| Spraberry | 8,014 | -5,080 |
| Jo Mill | 8,489 | -5,555 |
| Tubb | — | |
| Glorieta | — |
12 TOPS · FIRST 8
Four Corners 1729 A42-135-43880
0.3 KM · Firebird Energy LLC · Section with this well →
| Yates | 3,053 | -122 |
| Seven Rivers | 3,321 | -390 |
| Queen | 3,394 | -463 |
| Grayburg | 3,882 | -951 |
| San Andres | 5,052 | -2,121 |
| Glorieta | 6,076 | -3,145 |
| Clear Fork | 7,063 | -4,132 |
| Santa Rosa | — |
10 TOPS · FIRST 8
Four Corners 1729 B42-135-43881
0.3 KM · Firebird Energy LLC · Section with this well →
| Yates | 3,053 | -122 |
| Seven Rivers | 3,333 | -402 |
| Queen | 3,394 | -463 |
| Grayburg | 3,882 | -951 |
| San Andres | 5,052 | -2,121 |
| Glorieta | 6,053 | -3,122 |
| Clear Fork | 7,098 | -4,167 |
| Holt | — |
10 TOPS · FIRST 8
Millie B42-135-41606
0.4 KM · FDL Operating, LLC · Section with this well →
| Clear Fork | 7,335 | -4,400 |
| Spraberry | 8,518 | -5,583 |
| Wolfcamp | 9,155 | -6,220 |
| Strawn | 11,008 | -8,073 |
Millie C42-135-40635
0.6 KM · FDL Operating, LLC · Section with this well →
| San Andres | 5,094 | -2,172 |
| Spraberry | 8,462 | -5,540 |
| Wolfcamp | 9,105 | -6,183 |
| Strawn | 11,008 | -8,086 |
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/13543743, documented in the API reference.