PFLUGER, R.

Oil // district 9 // lease#15021

op: ULTRA OIL & GAS, INC.

fields: DARE I (COOK)

cum_oil

265k BBL

cum_gas

0 MCF

wells

4

production

2000-06 — 2026-03

peak_month

2002-07

-- production_history

cum_oil: 265,466 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

3,478 BBL/mo

Di (annual)

51.7%

b-factor

0.6

EUR

170,699 BBL

R-squared

0.798

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
C 5ULTRA OIL & GAS, INC.11,8002001-01-18
C 4ULTRA OIL & GAS, INC.11,9992000-12-19
C 3ULTRA OIL & GAS, INC.21,8002000-08-24
C 1ULTRA OIL & GAS, INC.12,1002000-05-10
EOF // data source: Texas Railroad Commission // 2026