DUGGER "A"

Oil // district 11 // lease#65866

op: ROBERTSON RESOURCES, INC.

cum_oil

143k BBL

cum_gas

0 MCF

wells

1

production

1993-01 — 2026-03

peak_month

1993-01

-- production_history

cum_oil: 143,324 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

605 BBL/mo

Di (annual)

4.3%

b-factor

0.3

EUR

166,417 BBL

R-squared

0.784

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1MINERAL DEVELOPMENT, INC.111,0001986-05-14
EOF // data source: Texas Railroad Commission // 2026