GLADNEY

Oil // district 6 // lease#13804

op: SANDRIDGE EXPL. AND PROD., LLC

cum_oil

236k BBL

cum_gas

0 MCF

wells

4

production

1997-10 — 2026-03

peak_month

1998-04

-- production_history

cum_oil: 235,584 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

3,180 BBL/mo

Di (annual)

20.5%

b-factor

0.2

EUR

229,453 BBL

R-squared

0.915

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7NATIONAL ENERGY GROUP, INC.37,5001998-04-28
8NATIONAL ENERGY GROUP, INC.17,5001998-02-17
4POWELL, GENE INVESTMENTS, INC.411,0001997-09-30
4 UPOWELL, GENE INVESTMENTS, INC.411,0001997-09-30
EOF // data source: Texas Railroad Commission // 2026