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RIO SAN MARCOS 36-45 UNIT 2A

Rio San Marcos 36-45 Unit 2A is an oil lease in Midland County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

9 wells

597,191bbl oil, last 12 months
Operator
Diamondback E&P LLC
County
Midland County
Field
Spraberry (Trend Area)
RRC lease
08-62127

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Where it sits

This county

Midland CountyMidlandMartinAndrewsGlasscockHowardEctorMidland County
Midland County
Gas, last 12 months
2,657,747 mcf
Oil in Jul 2026
35,535 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 since Nov 2024

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output since Nov 2024Monthly oil production and gas for RIO SAN MARCOS 36-45 UNIT 2A, Nov 2024 to Jul 2026. Oil output since Nov 2024. Monthly average of 35,557 bbl in the latest 3 months, against 0 bbl in the first 3.Last 12 months: 597,191 bblbbl per monthmcf per month0050k100k100k200k150k300k200k400kJan 25AprJulOctJan 26AprJul
Oil output since Nov 2024Monthly oil production and gas for RIO SAN MARCOS 36-45 UNIT 2A, Nov 2024 to Jul 2026. Oil output since Nov 2024. Monthly average of 35,557 bbl in the latest 3 months, against 0 bbl in the first 3.Last 12 monthsbbl per monthmcf per month0050k100k100k200k150k300k200k400kJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

93% of the gas went to a transmission line in the last 12 months

Flaring peaked at 4.8% of the gas in Feb 2025.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
93% of the gas went to a transmission line in the last 12 monthsShare of RIO SAN MARCOS 36-45 UNIT 2A gas by disposition code each month, Nov 2024 to Jul 2026. 93% of the gas went to a transmission line in the last 12 months. Flaring peaked at 4.8% of the gas in Feb 2025.Share of the lease’s gas by disposition code, per month0%50%100%Flared 4.8%Jan 25AprJulOctJan 26AprJul
93% of the gas went to a transmission line in the last 12 monthsShare of RIO SAN MARCOS 36-45 UNIT 2A gas by disposition code each month, Nov 2024 to Jul 2026. 93% of the gas went to a transmission line in the last 12 months. Flaring peaked at 4.8% of the gas in Feb 2025.Share of gas by disposition code0%50%100%Flared 4.8%Jan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    93% · 2,467,600 mcf

  • Lease fuel (1)

    6.7% · 178,466 mcf

  • Flared (4)

    0.4% · 11,681 mcf

0.4% of the gas flared in the last 12 months. 2 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., Nov 2024 to Dec 2024; Diamondback E&P LLC, Jan 2025 to Jul 202620252026Changed Jan 2025Endeavor Energy Resources L.P.Nov 2024 to Dec 2024Diamondback E&P LLCJan 2025 to now
Operators of this lease over timeEndeavor Energy Resources L.P., Nov 2024 to Dec 2024; Diamondback E&P LLC, Jan 2025 to Jul 202620252026Changed Jan 2025Endeavor Energy Resources L.P.Nov 2024 to Dec 2024Diamondback E&P LLCJan 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

9 wells on this lease

Wells on RIO SAN MARCOS 36-45 UNIT 2A
API numberWell no.Status
42-329-46844172Active
42-329-46845273Active
42-329-46846274Active
42-329-46847181Active
42-329-46848182Active
42-329-46865152Active
42-329-46866251Active
42-329-46867161Active
42-329-46868262Active

SourceTexas Railroad Commission Wellbore Query.

656.77 acres on the newest permit

  • Good to know

    9 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.

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Permits for Rio San Marcos 36-45 Unit 2A
API numberWell no.Acreson the permit
42-329-46865152656.77
42-329-46866251656.77
42-329-46867161656.77
42-329-46868262656.77
42-329-46845273656.77
42-329-46844172656.77
42-329-46846274656.77
42-329-46847181656.77
42-329-46848182656.77

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

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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

21 months, newest first

Ledger for RIO SAN MARCOS 36-45 UNIT 2A
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Diamondback E&P35,53535,723209,629193,796178$80.46$2.89
Jun 2026Diamondback E&P32,33132,065188,950170,7193,449$84.81$3.15
May 2026Diamondback E&P38,80438,833244,931227,5171,570$102.13$2.94
Apr 2026Diamondback E&P39,20239,212220,155203,563241$100.32$2.77
Mar 2026Diamondback E&P42,79942,898238,312220,109654$91.38$3.04
Feb 2026Diamondback E&P45,16745,159224,564210,981726$64.51$3.62
Jan 2026Diamondback E&P45,30545,273179,222167,313210$60.04$7.72
Dec 2025Diamondback E&P51,05751,040209,143196,45413$57.97$4.26
Nov 2025Diamondback E&P56,40656,389220,742205,5291,702$60.06$3.79
Oct 2025Diamondback E&P62,40262,326228,066211,4021,512$60.89$3.19
Sep 2025Diamondback E&P68,52568,641252,595236,489411$63.96$2.97
Aug 2025Diamondback E&P79,65879,781241,438223,7281,015$64.86$2.91
Jul 2025Diamondback E&P99,55899,398193,894179,1292,085$68.39$3.20
Jun 2025Diamondback E&P112,579112,727255,104239,3162,705$68.17$3.02
May 2025Diamondback E&P138,867138,706301,678284,2264,033$62.17$3.12
Apr 2025Diamondback E&P154,704154,816248,126231,1983,321$63.54$3.42
Mar 2025Diamondback E&P185,353185,133206,021184,8397,997$68.24$4.12
Feb 2025Diamondback E&P122,680122,483129,313114,9686,169$71.53$4.19
Jan 2025Diamondback E&P00000$75.74$4.13
Dec 2024Endeavor Energy00000$70.12$3.01
Nov 2024Endeavor Energy00000$69.95$2.12

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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Spraberry (Trend Area) field

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