KING-BOX UNIT

Oil // district 13 // lease#28415

op: WESTERN CHIEF OIL & GAS COMPANY

cum_oil

52k BBL

cum_gas

0 MCF

wells

1

production

1993-01 — 2008-03

peak_month

1994-05

-- production_history

cum_oil: 52,490 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,332 BBL/mo

Di (annual)

68.5%

b-factor

0.2

EUR

29,092 BBL

R-squared

0.803

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1WESTERN CHIEF OIL & GAS COMPANY25,3002004-04-27
EOF // data source: Texas Railroad Commission // 2026