ROBTANN "D"

Oil // district 8 // lease#28610

op: WALTER EXPLORATION INC.

cum_oil

5k BBL

cum_gas

0 MCF

wells

1

production

1999-05 — 2026-03

peak_month

1999-06

-- production_history

cum_oil: 4,822 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

359 BBL/mo

Di (annual)

171.2%

b-factor

0.5

EUR

4,769 BBL

R-squared

0.734

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1WALTER EXPLORATION INC.29,0001999-03-09
EOF // data source: Texas Railroad Commission // 2026