LONGHORN -213-

Oil // district 10 // lease#33781

op: VIN FISHER OPERATING, INC.

cum_oil

295k BBL

cum_gas

0 MCF

wells

7

production

1993-03 — 2026-03

peak_month

1994-03

-- production_history

cum_oil: 294,597 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,434 BBL/mo

Di (annual)

13.6%

b-factor

0.3

EUR

283,265 BBL

R-squared

0.880

type

hyperbolic

-- wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5RUST OIL CORP.14,7501999-11-24
4RUST OIL CORP.14,7501995-01-02
3RUST OIL CORP.14,7501993-11-05
1XRUST OIL CORP.14,7001993-05-27
2XRUST OIL CORP.14,7001993-05-27
1RUST OIL CORP.14,7001993-03-03
2RUST OIL CORP.14,7001993-03-03
EOF // data source: Texas Railroad Commission // 2026