CASTENO

Oil // district 10 // lease#36577

op: STEPHENS & JOHNSON OPERATING CO.

cum_oil

184k BBL

cum_gas

0 MCF

wells

3

production

2001-02 — 2026-03

peak_month

2001-05

-- production_history

cum_oil: 183,768 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

5,951 BBL/mo

Di (annual)

109.3%

b-factor

0.4

EUR

107,925 BBL

R-squared

0.523

type

hyperbolic

-- wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3STEPHENS & JOHNSON OPERATING CO.17,5002006-07-26
2RUWCO OIL AND GAS CORP.17,0002001-08-15
1RUWCO OIL AND GAS CORP.16,8002000-12-12
EOF // data source: Texas Railroad Commission // 2026