STATE LEASE 59455

Oil // district 3 // lease#9695

op: VASTAR RESOURCES, INC.

cum_oil

145k BBL

cum_gas

0 MCF

wells

3

production

1993-01 — 2026-03

peak_month

1993-03

-- production_history

cum_oil: 145,499 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

3,865 BBL/mo

Di (annual)

137.5%

b-factor

1.8

EUR

318,044 BBL

R-squared

0.724

type

hyperbolic

-- wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4LSTERLING EXPL. & PROD. CO., LLC49,9582012-09-11
2 UARCO OIL & GAS CO.19,1131991-05-06
11 UARCO OIL & GAS CO.29,6001990-06-11
EOF // data source: Texas Railroad Commission // 2026