KEMP-DERRICK UNIT

Oil // district 13 // lease#30070

op: WESTERN CHIEF OPERATING, L.L.C.

fields: MATLOCK

cum_oil

1k BBL

cum_gas

0 MCF

wells

1

production

2002-08 — 2008-03

peak_month

2002-08

-- production_history

cum_oil: 1,476 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

101 BBL/mo

Di (annual)

107.4%

b-factor

0.4

EUR

1,762 BBL

R-squared

0.710

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1WESTERN CHIEF OIL & GAS COMPANY25,7002025-07-18
EOF // data source: Texas Railroad Commission // 2026