MARSHALL "A"

Oil // district 13 // lease#21929

op: T-N-T ENGINEERING, INC.

cum_oil

211k BBL

cum_gas

0 MCF

wells

3

production

1993-01 — 2026-03

peak_month

2010-11

-- production_history

cum_oil: 211,268 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,913 BBL/mo

Di (annual)

37.4%

b-factor

0.4

EUR

98,119 BBL

R-squared

0.980

type

hyperbolic

-- wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3ASUNDAY CORPORATION15,5001991-02-25
2CA-TEX PETROLEUM, INC.15,3001982-03-05
1CA-TEX PETROLEUM, INC.15,3001982-02-18
EOF // multi-state drilling data platform // 2026