MANGOLD TRACT 23

Oil // district 13 // lease#32437

op: STEPHENS & JOHNSON OPERATING CO.

cum_oil

204k BBL

cum_gas

0 MCF

wells

3

production

2013-02 — 2026-03

peak_month

2013-07

-- production_history

cum_oil: 203,687 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

5,977 BBL/mo

Di (annual)

67.1%

b-factor

0.6

EUR

232,326 BBL

R-squared

0.864

type

hyperbolic

-- wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4STEPHENS & JOHNSON OPERATING CO.24,1002024-07-11
3STEPHENS & JOHNSON OPERATING CO.14,1002014-08-21
1STEPHENS & JOHNSON OPERATING CO.24,0522012-08-23
EOF // data source: Texas Railroad Commission // 2026