SUGG "B"

Oil // district 9 // lease#11403

op: KEYSTONE ENERGY OIL & GAS, INC.

cum_oil

7k BBL

cum_gas

0 MCF

wells

4

production

1993-01 — 1996-09

peak_month

1993-04

-- production_history

cum_oil: 6,581 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

328 BBL/mo

Di (annual)

63.7%

b-factor

0.0

EUR

6,167 BBL

R-squared

0.403

type

exponential

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3USENCO-KEYSTONE18,2001985-01-03
4USENCO-KEYSTONE18,2001985-01-03
1USENCO-KEYSTONE18,2001984-12-17
2USENCO-KEYSTONE18,2001984-12-17
EOF // multi-state drilling data platform // 2026