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Texas oil lease

Producing

COSPER 37-48 WSL

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

12 wells

267,005bbl oil, last 12 months−24% vs prior year
Operator
Diamondback E&P LLC
County
Midland County
Field
Spraberry (Trend Area)
RRC lease
08-56236

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Where it sits

This county

Midland CountyMidlandMartinAndrewsGlasscockHowardEctorMidland County
Midland County
Gas, last 12 months
1,147,119 mcf
Oil in Jul 2026
23,050 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.

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Production by month

Oil output fell 24% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 24% over the last 12 monthsMonthly oil production and gas for COSPER 37-48 WSL, Aug 2023 to Jul 2026. Oil output fell 24% over the last 12 months. 267,005 bbl in the 12 months through Jul 2026, against 349,986 bbl in the 12 months before.Last 12 months: 267,005 bblbbl per monthmcf per month0020k50k40k100k60k150k80k200k100k250kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 24% over the last 12 monthsMonthly oil production and gas for COSPER 37-48 WSL, Aug 2023 to Jul 2026. Oil output fell 24% over the last 12 months. 267,005 bbl in the 12 months through Jul 2026, against 349,986 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0020k50k40k100k60k150k80k200k100k250kJan 24JulJan 25JulJan 26Jul

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)
Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plantShare of COSPER 37-48 WSL gas by disposition code each month, Aug 2023 to Jul 2026. 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.Share of the lease’s gas by disposition code, per month0%50%100%Nov 2024: plant to lineFlared 13.0%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Nov 2024 the lease's gas goes to a transmission line instead of a processing plantShare of COSPER 37-48 WSL gas by disposition code each month, Aug 2023 to Jul 2026. 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.Share of gas by disposition code0%50%100%Nov 24: plant to lineFlared 13.0%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    93% · 1,061,794 mcf

  • Lease fuel (1)

    5.8% · 66,181 mcf

  • Flared (4)

    1.7% · 19,144 mcf

1.7% 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

Operators of this lease over timeEndeavor Energy Resources L.P., Oct 2021 to Dec 2024; Diamondback E&P LLC, Jan 2025 to Jul 202620222023202420252026Changed Jan 2025Endeavor Energy Resources L.P.Oct 2021 to Dec 2024Diamondback E&P LLCJan 2025 to now
Operators of this lease over timeEndeavor Energy Resources L.P., Oct 2021 to Dec 2024; Diamondback E&P LLC, Jan 2025 to Jul 202620222023202420252026Changed Jan 2025Endeavor Energy Resources L.P.Oct 2021 to Dec 2024Diamondback E&P LLCJan 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

12 wells on this lease

Wells on COSPER 37-48 WSL
API numberWell no.Status
42-329-44493251Active
42-329-44494162Active
42-329-44495261Active
42-329-44496263Active
42-329-44498172Active
42-329-44499271Active
42-329-44500273Active
42-329-44501174Active
42-329-44502182Active
42-329-44503281Active
42-329-45302152Active
42-329-45496164Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Plains Marketing, L.p.OilGathers100Oct 1, 2022–
Enterprise Products Operating LLCCasinghead gasBuys100Oct 1, 2022–
Enterprise Products Operating LLCCasinghead gasGathers100Oct 1, 2022–
Navitas Mdstr Midland Basin, LLCCasinghead gasGathers100May 14, 2021Oct 1, 2022
Navitas Mdstr Midland Basin, LLCCasinghead gasBuys100May 14, 2021Oct 1, 2022
Plains Pipeline L.p.OilGathers100May 14, 2021Oct 1, 2022

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

Who buys my oilOil price check

647.02 acres on the newest permit

  • Good to know

    The wells on this lease state different acreage

    The permits state between 647.02 and 647.03 acres. Use the acres from your own division order for the well you are paid on.

  • Good to know

    12 wells are listed on this lease

    Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.

  • 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 WSL
API numberWell no.Acreson the permit
42-329-45496164647.02
42-329-45302152647.02
42-329-44493251647.02
42-329-44494162647.02
42-329-44495261647.02
42-329-44496263647.02
42-329-44498172647.03
42-329-44499271647.02
42-329-44500273647.02
42-329-44501174647.02
42-329-44502182647.02
42-329-44503281647.02

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.
QuarterOil$ per bblFiling
Q2 2026$96.82SEC filing
Q1 2026$73.47SEC filing
Q4 2025$58.00SEC filing
Q3 2025$64.60SEC filing
Q2 2025$63.23SEC filing
Q1 2025$70.95SEC 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 WSL
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Diamondback E&P23,05023,01798,70590,2322,270$80.46$2.89
Jun 2026Diamondback E&P22,67223,11790,52684,288509$84.81$3.15
May 2026Diamondback E&P23,99823,74288,86883,09549$102.13$2.94
Apr 2026Diamondback E&P21,21621,21475,09469,46213$100.32$2.77
Mar 2026Diamondback E&P23,27223,41772,08066,93324$91.38$3.04
Feb 2026Diamondback E&P29,25029,18535,10732,59676$64.51$3.62
Jan 2026Diamondback E&P27,35327,31444,09240,590550$60.04$7.72
Dec 2025Diamondback E&P17,26017,00448,11644,37879$57.97$4.26
Nov 2025Diamondback E&P9,3689,49577,01962,1599,993$60.06$3.79
Oct 2025Diamondback E&P22,66223,298162,424154,425201$60.89$3.19
Sep 2025Diamondback E&P22,83222,198173,427165,296258$63.96$2.97
Aug 2025Diamondback E&P24,07224,106181,661168,3405,122$64.86$2.91
Jul 2025Diamondback E&P24,19424,168192,278182,2181,529$68.39$3.20
Jun 2025Diamondback E&P24,99325,008184,775169,2567,413$68.17$3.02
May 2025Diamondback E&P26,89026,997197,353171,83817,194$62.17$3.12
Apr 2025Diamondback E&P29,05729,063180,274171,710533$63.54$3.42
Mar 2025Diamondback E&P27,94927,830173,046164,830354$68.24$4.12
Feb 2025Diamondback E&P27,34227,357166,839157,7352,052$71.53$4.19
Jan 2025Diamondback E&P30,13330,113181,523163,73010,061$75.74$4.13
Dec 2024Endeavor Energy27,41027,421171,607162,1052,101$70.12$3.01
Nov 2024Endeavor Energy30,54830,570197,219188,801619$69.95$2.12
Oct 2024Endeavor Energy33,69833,642192,303185,015131$71.99$2.20
Sep 2024Endeavor Energy32,78732,803176,887170,1740$70.24$2.28
Aug 2024Endeavor Energy34,98535,027182,998175,970259$76.68$1.99
Jul 2024Endeavor Energy35,66535,666178,579167,0324,358$81.80$2.07
Jun 2024Endeavor Energy39,11639,069161,212154,143994$79.77$2.54
May 2024Endeavor Energy40,89940,835158,999153,82567$80.02$2.12
Apr 2024Endeavor Energy34,91634,957128,786123,97955$85.35$1.60
Mar 2024Endeavor Energy35,97435,990122,141118,0711$81.28$1.49
Feb 2024Endeavor Energy32,89932,886124,413119,75521$77.25$1.72
Jan 2024Endeavor Energy42,99943,018171,122163,6503,769$74.15$3.18
Dec 2023Endeavor Energy49,69249,766201,742197,99836$71.90$2.52
Nov 2023Endeavor Energy52,00251,920198,220193,870638$77.69$2.71
Oct 2023Endeavor Energy46,74746,765189,508183,6262,573$85.64$2.98
Sep 2023Endeavor Energy52,09052,076193,090174,07316,521$89.43$2.64
Aug 2023Endeavor Energy68,96668,914234,708227,2933,863$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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This lease belongs to

OperatorDiamondback E&P LLCFieldSpraberry (Trend Area)CountyMidland County

Diamondback E&P LLC in Midland County

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