GRAYSTONE UNIT 39-26

Oil // district 10 // lease#62685

op: SURGE OPERATING, LLC

cum_oil

756k BBL

cum_gas

0 MCF

wells

6

production

2024-11 — 2026-03

peak_month

2024-12

-- production_history

cum_oil: 755,819 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

136,148 BBL/mo

Di (annual)

506.1%

b-factor

1.2

EUR

2,577,527 BBL

R-squared

0.992

type

hyperbolic

-- wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4AHSURGE OPERATING, LLC18,5002024-05-08
4SHSURGE OPERATING, LLC18,5002024-05-08
5AHSURGE OPERATING, LLC18,5002024-05-08
5SHSURGE OPERATING, LLC18,5002024-05-08
6AHSURGE OPERATING, LLC18,5002024-05-08
6SHSURGE OPERATING, LLC18,5002024-05-08
EOF // data source: Texas Railroad Commission // 2026