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Texas oil lease

Producing

UL MARSHALLDALE 15-28 B

Ul Marshalldale 15-28 B is an oil lease in Martin County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

1 well

121,137bbl oil, since Nov 2025
Operator
Diamondback E&P LLC
County
Martin County
Field
Spraberry (Trend Area)
RRC lease
08-63264

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Where it sits

This county

Martin CountyMartinGainesAndrewsHowardDawsonBordenMartin County
Martin County
Gas, since Nov 2025
89,090 mcf
Oil in Jul 2026
11,220 bbl

Checks stopped on this lease?

  • Buyer

    Buyer changed: ONEOK MIDLAND MIDSTREAM, LLC replaced ENLINK GAS MARKETING, LP as the buyer of this lease's gas from oil wells on Apr 1, 2026.

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

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First check

Production started January 2026; the first check is due by about May 31, 2026 (estimate).

When is my first royalty check due?

Production by month

Oil output rose 52% since Nov 2025

  • Oil (bars)
  • Gas (line)
Oil output rose 52% since Nov 2025Monthly oil production and gas for UL MARSHALLDALE 15-28 B, Nov 2025 to Jul 2026. Oil output rose 52% since Nov 2025. Monthly average of 11,530 bbl in the latest 3 months, against 7,576 bbl in the first 3.bbl per monthmcf per month005,0005,00010k10k15k15k20k20k25k25kOct 25Jan 26AprJul
Oil output rose 52% since Nov 2025Monthly oil production and gas for UL MARSHALLDALE 15-28 B, Nov 2025 to Jul 2026. Oil output rose 52% since Nov 2025. Monthly average of 11,530 bbl in the latest 3 months, against 7,576 bbl in the first 3.bbl per monthmcf per month005,0005,00010k10k15k15k20k20k25k25kJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

97% of the gas went to a transmission line in the 7 months reported

Flaring peaked at 4.1% of the gas in Jun 2026.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
97% of the gas went to a transmission line in the 7 months reportedShare of UL MARSHALLDALE 15-28 B gas by disposition code each month, Nov 2025 to Jul 2026. 97% of the gas went to a transmission line in the 7 months reported. Flaring peaked at 4.1% of the gas in Jun 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 4.1%Oct 25Jan 26AprJul
97% of the gas went to a transmission line in the 7 months reportedShare of UL MARSHALLDALE 15-28 B gas by disposition code each month, Nov 2025 to Jul 2026. 97% of the gas went to a transmission line in the 7 months reported. Flaring peaked at 4.1% of the gas in Jun 2026.Share of gas by disposition code0%50%100%Flared 4.1%Jan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    97% · 86,178 mcf

  • Lease fuel (1)

    1.8% · 1,621 mcf

  • Flared (4)

    1.4% · 1,291 mcf

1.4% of the gas flared in the 7 months reported. One month above 3%.

1 well on this lease

Wells on UL MARSHALLDALE 15-28 B
API numberWell no.Status
42-317-457041MSActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Oryx Midland Oil Gathering LLCOilGathers100Dec 11, 2025–
Oneok Midland Midstream, LLCCasinghead gasBuys100Apr 1, 2026–
Enlink Permian, LLCCasinghead gasGathers100Dec 11, 2025–
Enlink Gas Marketing, LPCasinghead gasBuys100Dec 11, 2025Apr 1, 2026

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

Who buys my oilOil price check

1,120 acres on the newest permit

  • Worth asking

    An allocation well is on this lease

    A well drilled across several tracts shares its production by an allocation formula, so the decimal is not always your acres over the unit acres. Ask the operator for the allocation formula and the tract factor for your land.

Check your decimal on this lease
Permits for Ul Marshalldale 15-28 B
API numberWell no.Acreson the permit
42-317-457041MS1,120

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

9 months, newest first

Ledger for UL MARSHALLDALE 15-28 B
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202611,22011,20410,54110,310105$80.46$2.89
Jun 202610,15810,1649,5918,989396$84.81$3.15
May 202613,21313,21610,70910,39772$102.13$2.94
Apr 202616,48716,56012,33212,00360$100.32$2.77
Mar 202623,90423,91118,39617,708338$91.38$3.04
Feb 202623,42723,36214,33014,04836$64.51$3.62
Jan 202622,72822,69613,19112,723284$60.04$7.72
Dec 202500000$57.97$4.26
Nov 202500000$60.06$3.79

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

This lease belongs to

OperatorDiamondback E&P LLCFieldSpraberry (Trend Area)CountyMartin County

Diamondback E&P LLC in Martin County

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Spraberry (Trend Area) field

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