CALHOUN, T.

Oil // district 11 // lease#68697

op: ULTRA OIL & GAS, INC.

cum_oil

70k BBL

cum_gas

0 MCF

wells

2

production

2004-05 — 2026-03

peak_month

2005-12

-- production_history

cum_oil: 70,038 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,616 BBL/mo

Di (annual)

89.8%

b-factor

0.2

EUR

43,655 BBL

R-squared

0.658

type

hyperbolic

-- wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ULTRA OIL & GAS, INC.213,0002006-09-26
2ULTRA OIL & GAS, INC.212,5002005-07-11
EOF // data source: Texas Railroad Commission // 2026