Texas oil lease

Producing

COSPER 37-48 UNIT 1B

Name: COSPER 37-48 UNIT 1B monthly oil and gas production, Midland County, Texas
Creator: Texas Railroad Commission

Cosper 37-48 Unit 1B is an oil lease in Midland County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

3 wells

53,625bbl oil, last 12 months−36% vs prior year

Operator: Diamondback E&P LLC
County: Midland County
Field: Spraberry (Trend Area)
RRC lease: 08-58098

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Where it sits

This county

Midland County

Gas, last 12 months: 455,593 mcf
Oil in Jul 2026: 4,328 bbl

Checks stopped on this lease?

Operator
Operator changed: Diamondback E&P LLC took over from Endeavor Energy Resources L.P. in Jan 2025.

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

See why checks stop on this lease

Production by month

Oil output fell 36% over the last 12 months

Oil (bars)
Gas (line)
Last 12 months

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plant

Flaring peaked at 13.0% of the gas in Nov 2025.

Processing plant (3)
Transmission line (2)
Lease fuel (1)
Flared (4)

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Transmission line (2)
92% · 419,624 mcf
Lease fuel (1)
6.4% · 29,069 mcf
Flared (4)
1.5% · 6,900 mcf

1.5% of the gas flared in the last 12 months. 5 months above 3%.

Who has run this lease

The operator changed once, most recently in Jan 2025

Diamondback E&P LLC Jan 2025 to now
Endeavor Energy Resources L.P. Oct 2022 to Dec 2024

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

3 wells on this lease

Wells on COSPER 37-48 UNIT 1B
API number	Well no.	Status
42-329-45285	221	Active
42-329-45286	231	Active
42-329-45287	243	Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
Company	Product	Role	Share%	From
Plains Marketing, L.p.	Oil	Gathers	100	Oct 8, 2022
Enterprise Products Operating LLC	Casinghead gas	Buys	100	Oct 8, 2022
Enterprise Products Operating LLC	Casinghead gas	Gathers	100	Oct 8, 2022

SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).

Who buys my oil Oil price check

567.64 acres on the newest permit

Good to know
The wells on this lease state different acreage
The permits state between 565.61 and 567.64 acres. Use the acres from your own division order for the well you are paid on.
Worth asking
A Rule 37 case is listed
The RRC permit records list a Rule 37 case. This does not establish your royalty share. Ask for the permit and unit plat for your well.

Check your decimal on this lease

Permits for Cosper 37-48 Unit 1B
API number	Well no.	Permit issued	Completed	Acreson the permit	Type
42-329-45285	221	Dec 2, 2021	Oct 8, 2022	565.61	Horizontal
42-329-45287	243	Dec 2, 2021	Oct 17, 2022	567.64	Horizontal
42-329-45286	231	Dec 1, 2021	Oct 17, 2022	565.64	Horizontal

SourceRailroad Commission drilling permits, Oct 3, 2026 (source 1, source 2).

Unit decimal checker

What Diamondback Energy, Inc. told investors it received

Diamondback E&P LLC is linked to Diamondback Energy, Inc. (FANG).

Realized prices reported by Diamondback Energy, Inc.
Quarter	Oil$ per bbl	Gas$ per mcf	Gas liquids$ per bbl	Filing
Q2 2026	$96.82	−$2.15	$18.56	SEC filing
Q1 2026	$73.47	$0.18	$16.68	SEC filing
Q4 2025	$58.00	$0.03	$13.51	SEC filing
Q3 2025	$64.60	$0.75	$17.28	SEC filing
Q2 2025	$63.23	$0.88	$18.13	SEC filing
Q1 2025	$70.95	$2.11	$23.94	SEC filing

SourceDiamondback Energy, Inc. quarterly reports, SEC EDGAR, company-wide averages before hedging.

Estimate your royalty

36 months, newest first

Ledger for COSPER 37-48 UNIT 1B
Month	Operator	Oil producedbbl	Oil soldbbl	Gas producedmcf	Gas soldmcf, codes 2+3	Flaredmcf	WTI$/bbl	Henry Hub$/MMBtu
Jul 2026Diamondback E&P	Diamondback E&P LLC	4,328	4,321	47,534	43,406	1,106	$80.46	$2.89
Jun 2026Diamondback E&P	Diamondback E&P LLC	4,222	4,336	49,295	45,829	283	$84.81	$3.15
May 2026Diamondback E&P	Diamondback E&P LLC	5,625	5,540	48,136	44,978	27	$102.13	$2.94
Apr 2026Diamondback E&P	Diamondback E&P LLC	3,564	3,583	30,330	28,024	5	$100.32	$2.77
Mar 2026Diamondback E&P	Diamondback E&P LLC	5,110	5,091	41,456	38,433	14	$91.38	$3.04
Feb 2026Diamondback E&P	Diamondback E&P LLC	3,567	3,577	40,431	37,315	94	$64.51	$3.62
Jan 2026Diamondback E&P	Diamondback E&P LLC	4,427	4,445	34,376	31,518	449	$60.04	$7.72
Dec 2025Diamondback E&P	Diamondback E&P LLC	3,811	3,781	29,433	27,101	49	$57.97	$4.26
Nov 2025Diamondback E&P	Diamondback E&P LLC	3,619	3,615	29,336	23,665	3,814	$60.06	$3.79
Oct 2025Diamondback E&P	Diamondback E&P LLC	4,570	4,723	33,326	31,685	41	$60.89	$3.19
Sep 2025Diamondback E&P	Diamondback E&P LLC	5,190	5,047	37,726	35,958	56	$63.96	$2.97
Aug 2025Diamondback E&P	Diamondback E&P LLC	5,592	5,593	34,214	31,712	962	$64.86	$2.91
Jul 2025Diamondback E&P	Diamondback E&P LLC	5,128	5,127	36,536	34,628	290	$68.39	$3.20
Jun 2025Diamondback E&P	Diamondback E&P LLC	5,697	5,703	37,437	34,298	1,499	$68.17	$3.02
May 2025Diamondback E&P	Diamondback E&P LLC	6,362	6,378	39,908	34,759	3,470	$62.17	$3.12
Apr 2025Diamondback E&P	Diamondback E&P LLC	6,220	6,224	32,476	30,938	96	$63.54	$3.42
Mar 2025Diamondback E&P	Diamondback E&P LLC	6,143	6,117	29,282	27,898	60	$68.24	$4.12
Feb 2025Diamondback E&P	Diamondback E&P LLC	6,111	6,121	36,451	34,474	446	$71.53	$4.19
Jan 2025Diamondback E&P	Diamondback E&P LLC	7,335	7,340	42,838	38,643	2,372	$75.74	$4.13
Dec 2024Endeavor Energy	Endeavor Energy Resources L.P.	7,502	7,496	46,362	43,795	568	$70.12	$3.01
Nov 2024Endeavor Energy	Endeavor Energy Resources L.P.	7,587	7,593	45,918	43,961	144	$69.95	$2.12
Oct 2024Endeavor Energy	Endeavor Energy Resources L.P.	8,346	8,334	39,766	37,564	749	$71.99	$2.20
Sep 2024Endeavor Energy	Endeavor Energy Resources L.P.	8,418	8,424	37,487	36,029	37	$70.24	$2.28
Aug 2024Endeavor Energy	Endeavor Energy Resources L.P.	9,220	9,236	39,704	38,209	25	$76.68	$1.99
Jul 2024Endeavor Energy	Endeavor Energy Resources L.P.	9,910	9,875	45,101	43,231	9	$81.80	$2.07
Jun 2024Endeavor Energy	Endeavor Energy Resources L.P.	6,705	6,720	19,600	18,843	14	$79.77	$2.54
May 2024Endeavor Energy	Endeavor Energy Resources L.P.	10,294	10,290	35,469	34,304	26	$80.02	$2.12
Apr 2024Endeavor Energy	Endeavor Energy Resources L.P.	10,728	10,742	28,800	27,059	704	$85.35	$1.60
Mar 2024Endeavor Energy	Endeavor Energy Resources L.P.	11,155	11,166	48,568	46,842	111	$81.28	$1.49
Feb 2024Endeavor Energy	Endeavor Energy Resources L.P.	10,906	10,850	25,191	24,124	133	$77.25	$1.72
Jan 2024Endeavor Energy	Endeavor Energy Resources L.P.	5,966	6,005	8,374	8,092	99	$74.15	$3.18
Dec 2023Endeavor Energy	Endeavor Energy Resources L.P.	13,185	13,202	52,058	50,994	109	$71.90	$2.52
Nov 2023Endeavor Energy	Endeavor Energy Resources L.P.	13,393	13,394	44,213	42,435	966	$77.69	$2.71
Oct 2023Endeavor Energy	Endeavor Energy Resources L.P.	15,814	15,776	43,764	42,725	269	$85.64	$2.98
Sep 2023Endeavor Energy	Endeavor Energy Resources L.P.	9,980	9,987	0	0	0	$89.43	$2.64
Aug 2023Endeavor Energy	Endeavor Energy Resources L.P.	15,441	15,432	47,538	43,441	3,418	$81.39	$2.58

Flared above 3%

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

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Nearby

Leases within 10 km

LAWSON "A"
28 bbl · 0.1 km
COSPER 37-48 UNIT 1A
187,758 bbl · 0.1 km
COSPER 37-48 WSL
267,005 bbl · 0.2 km
MATTHEWS -A-
0 bbl · 0.5 km
DUCK POND 21910 36-25
125,757 bbl · 0.7 km
SNYDER -E-
0 bbl · 0.8 km
GERMANIA SPRABERRY UNIT
214,469 bbl · 0.9 km
HOLY GRAIL 43
0 bbl · 1 km
SNYDER -D-
0 bbl · 1.1 km
COSPER "37"
3,814 bbl · 1.2 km

Drilling permits within 10 km

RIVERCREST 47-11 A #R 4WA
new drill · horizontal · Diamondback E&P LLC · Midland County · 3.7 km
Permit 0918826 · Oct 1, 2026
GUNNISON 8-5-B #05WB
new drill · horizontal · Cutbow Operating, LLC · Martin County · 6.9 km
Permit 0918310 · Sep 30, 2026
GUNNISON 8-5-C #10LS
new drill · horizontal · Cutbow Operating, LLC · Martin County · 6.9 km
Permit 0918317 · Sep 30, 2026
GUNNISON 8-5-C #10WA
new drill · horizontal · Cutbow Operating, LLC · Martin County · 6.9 km
Permit 0918318 · Sep 30, 2026
GUNNISON 8-5-B #05MS
new drill · horizontal · Cutbow Operating, LLC · Martin County · 6.9 km
Permit 0918311 · Sep 30, 2026

Is your check right?

Where it sits

Checks stopped on this lease?

Production by month

Oil output fell 36% over the last 12 months

Where the gas went

Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plant

Who has run this lease

The operator changed once, most recently in Jan 2025

3 wells on this lease

Buyers and gatherers

567.64 acres on the newest permit

What Diamondback Energy, Inc. told investors it received

Estimate your royalty

36 months, newest first

Do your checks match this lease?

Nearby

This lease belongs to

Diamondback E&P LLC in Midland County

Spraberry (Trend Area) field

Leases within 10 km

Drilling permits within 10 km