HILL "A"

Oil // district 10 // lease#31724

op: STEVENS & TULL, INC.

cum_oil

55k BBL

cum_gas

0 MCF

wells

5

production

1993-01 — 2026-03

peak_month

1993-08

-- production_history

cum_oil: 55,444 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

664 BBL/mo

Di (annual)

29.0%

b-factor

0.5

EUR

48,329 BBL

R-squared

0.744

type

hyperbolic

-- wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
508CHAPARRAL ENERGY, L.L.C.24,0002008-10-23
493STEVENS & TULL, INC.13,0001993-07-01
389STEVENS & TULL, INC.13,0001989-12-12
2STEVENS & TULL, INC.13,0001988-04-27
13 WAY OPERATING COMPANY13,0001988-02-19
EOF // data source: Texas Railroad Commission // 2026