KEYSTONE CATTLE CO. -19-

Oil // district 10 // lease#25701

op: WHITING OIL AND GAS CORPORATION

cum_oil

200k BBL

cum_gas

0 MCF

wells

3

production

1993-01 — 2026-03

peak_month

1993-01

-- production_history

cum_oil: 199,907 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,960 BBL/mo

Di (annual)

11.4%

b-factor

0.0

EUR

205,784 BBL

R-squared

0.850

type

exponential

-- wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3CROWNQUEST OPERATING, LLC18,9992004-02-04
2HSOUTHLAND ROYALTY COMPANY28,4001988-08-22
1SOUTHLAND ROYALTY COMPANY19,8201979-09-21
EOF // multi-state drilling data platform // 2026