Texas oil lease
Producing4K BLACK HILLS UNIT A
4K Black Hills Unit A is an oil lease in Atascosa County, Texas, operated by Trailblazer Energy Resources,llc in the Eagleville (Eagle Ford-1) field.
1 well
- Operator
- Trailblazer Energy Resources,llc
- County
- Atascosa County
- RRC lease
- 01-21645
Is your check right?
Where it sits
This county
- Gas, last 12 months
- 26,261 mcf
- Oil in Jul 2026
- 2,090 bbl
Checks stopped on this lease?
- Operator
Operator changed: Trailblazer Energy Resources,llc took over from Pillar Efs, LLC in Feb 2026.
- P-5
The previous operator's P-5 registration is listed as inactive since Jul 21, 2026 (last P-5 filed Mar 2, 2026).
SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.
See why checks stop on this leaseProduction by month
Oil output fell 81% since Dec 2024
- Oil (bars)
- Gas (line)
- Last 12 months
SourceTexas Railroad Commission Production Data Query, through Jul 2026.
Where the gas went
97% of the gas went to a transmission line in the last 12 months
Flaring peaked at 15.0% of the gas in Dec 2025.
- Transmission line (2)
- Flared (4)
SourceTexas Railroad Commission Production Data Query, through Jul 2026.
Transmission line (2)
97% · 25,558 mcf
Flared (4)
2.7% · 703 mcf
2.7% of the gas flared in the last 12 months. 8 months above 3%.
Who has run this lease
The operator changed once, most recently in Feb 2026
- Trailblazer Energy Resources,llc Feb 2026 to now
- Pillar Efs, LLC Dec 2024 to Jan 2026
SourceTexas Railroad Commission Production Data Query, through Jul 2026.
1 well on this lease
| API number | Well no. | Status |
|---|---|---|
| 42-013-36071 | 1H | Active |
SourceTexas Railroad Commission Wellbore Query.
Buyers and gatherers
| Company | Product | Role | Share% | From | Until |
|---|---|---|---|---|---|
| Enterprise Crude Oil LLC | Oil | Gathers | 90 | Jun 1, 2026 | – |
| Texon Midstream, LLC | Oil | Gathers | 10 | Jun 1, 2026 | – |
| Et Gathering & Processing LLC | Casinghead gas | Buys | 100 | Dec 3, 2024 | – |
| Energy Transfer Company | Casinghead gas | Gathers | 100 | Dec 3, 2024 | – |
| Enterprise Crude Oil LLC | Oil | Gathers | 100 | Dec 3, 2024 | Jun 1, 2026 |
SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).
Estimate your royalty
20 months, newest first
| Month | Oil producedbbl | Oil soldbbl | Gas producedmcf | Gas soldmcf, codes 2+3 | Flaredmcf | WTI$/bbl | Henry Hub$/MMBtu |
|---|---|---|---|---|---|---|---|
| Jul 2026Trailblazer Energy | 2,090 | 2,134 | 3,095 | 3,095 | 0 | $80.46 | $2.89 |
| Jun 2026Trailblazer Energy | 2,337 | 2,119 | 2,594 | 2,594 | 0 | $84.81 | $3.15 |
| May 2026Trailblazer Energy | 2,598 | 2,649 | 4,130 | 4,089 | 41 | $102.13 | $2.94 |
| Apr 2026Trailblazer Energy | 2,445 | 2,333 | 2,358 | 2,183 | 175 | $100.32 | $2.77 |
| Mar 2026Trailblazer Energy | 2,428 | 2,571 | 2,846 | 2,794 | 52 | $91.38 | $3.04 |
| Feb 2026Trailblazer Energy | 3,689 | 3,897 | 3,066 | 2,965 | 101 | $64.51 | $3.62 |
| Jan 2026Pillar Efs, | 2,766 | 2,453 | 613 | 613 | 0 | $60.04 | $7.72 |
| Dec 2025Pillar Efs, | 2,944 | 2,929 | 1,137 | 967 | 170 | $57.97 | $4.26 |
| Nov 2025Pillar Efs, | 2,953 | 2,964 | 1,522 | 1,522 | 0 | $60.06 | $3.79 |
| Oct 2025Pillar Efs, | 3,092 | 3,153 | 1,498 | 1,498 | 0 | $60.89 | $3.19 |
| Sep 2025Pillar Efs, | 3,407 | 3,362 | 1,957 | 1,879 | 78 | $63.96 | $2.97 |
| Aug 2025Pillar Efs, | 3,788 | 3,835 | 1,445 | 1,359 | 86 | $64.86 | $2.91 |
| Jul 2025Pillar Efs, | 4,061 | 4,093 | 1,722 | 1,722 | 0 | $68.39 | $3.20 |
| Jun 2025Pillar Efs, | 4,078 | 4,290 | 1,787 | 1,768 | 19 | $68.17 | $3.02 |
| May 2025Pillar Efs, | 5,378 | 5,053 | 2,154 | 1,977 | 177 | $62.17 | $3.12 |
| Apr 2025Pillar Efs, | 7,006 | 6,914 | 2,644 | 2,531 | 113 | $63.54 | $3.42 |
| Mar 2025Pillar Efs, | 5,748 | 5,919 | 3,485 | 3,485 | 0 | $68.24 | $4.12 |
| Feb 2025Pillar Efs, | 10,030 | 9,875 | 4,624 | 4,624 | 0 | $71.53 | $4.19 |
| Jan 2025Pillar Efs, | 15,105 | 15,135 | 6,174 | 6,069 | 105 | $75.74 | $4.13 |
| Dec 2024Pillar Efs, | 12,229 | 12,057 | 4,938 | 4,275 | 663 | $70.12 | $3.01 |
Flared above 3%
SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.
How to check your stub against this lease Checks stopped on this lease? See the likely reasonsDo your checks match this lease?
Nearby
This lease belongs to
Trailblazer Energy Resources,llc in Atascosa County
- ROAD HOUSE ALLOCATION
38,734 bbl
- OCELOT ALLOCATION
36,098 bbl
- OCELOT
35,453 bbl
- POTH A
30,731 bbl
- BELLA UNIT
31,264 bbl
- TIMMERMAN AW A
28,961 bbl
- MINNIE PEARL UNIT
27,892 bbl
- POINT BREAK UNIT
26,431 bbl
- TIMMERMAN AW B
26,770 bbl
- TIMMERMAN AW C
24,830 bbl
Eagleville (Eagle Ford-1) field
- PHZ UNIT
34,604 bbl
- BRACKEN SOUTH
439,721 mcf
- RALPH EDWARDS HC3
34,353 bbl
- WASHBURN RANCH 02
114,771 mcf
- CRX YBAR C
33,636 bbl
- BARING
33,950 bbl
- CRONIN C
34,759 bbl
- CUTTER CREEK
33,729 bbl
- BURGARD UNIT
33,415 bbl
- HARVEY JOHNSON EF UNIT
32,467 bbl
Leases within 10 km
- 4K BLACK HILLS UNIT B
64,112 bbl · 0 km
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3,844 bbl · 0.8 km
- FLORES UNIT
0 bbl · 1.1 km
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6,011 bbl · 1.3 km
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16,112 bbl · 3.7 km
Drilling permits within 10 km
LEVIATHAN E #5H
new drill · horizontal · EOG Resources, Inc. · Atascosa County · 8.6 km
Permit 0918191 · Sep 1, 2026
LEVIATHAN D #4H
new drill · horizontal · EOG Resources, Inc. · Atascosa County · 8.6 km
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LEVIATHAN C #3H
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LEVIATHAN B #2H
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LEVIATHAN F #6H
new drill · horizontal · EOG Resources, Inc. · Atascosa County · 8.6 km
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