MARTIN-MASON RANCH UNIT A

Oil // district 1 // lease#15510

op: INEOS USA OIL & GAS LLC

cum_oil

291k BBL

cum_gas

0 MCF

wells

2

production

2010-12 — 2026-03

peak_month

2012-03

-- production_history

cum_oil: 291,124 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

8,854 BBL/mo

Di (annual)

86.5%

b-factor

0.5

EUR

234,970 BBL

R-squared

0.743

type

hyperbolic

-- wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
U 5HCHESAPEAKE OPERATING, INC.112,0002011-04-01
1HUNION GAS OPERATING COMPANY19,8502010-04-21
EOF // data source: Texas Railroad Commission // 2026