LANGFORD, ET AL

Oil // district 13 // lease#20871

op: KEY ENERGY OF COLORADO, INC.

cum_oil

25k BBL

cum_gas

0 MCF

wells

2

production

1993-01 — 2012-03

peak_month

1993-04

-- production_history

cum_oil: 24,521 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

449 BBL/mo

Di (annual)

31.1%

b-factor

0.8

EUR

41,422 BBL

R-squared

0.660

type

hyperbolic

-- wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3025RIO PETROLEUM, INC.49,0002006-05-12
1KEY ENERGY OF COLORADO, INC.28,9002005-05-10
EOF // data source: Texas Railroad Commission // 2026