HALLEY "A"

Oil // district 10 // lease#2430

op: SIMON, W. D. OIL CO.

fields: HALLEY

cum_oil

63k BBL

cum_gas

0 MCF

wells

12

production

1993-01 — 2026-03

peak_month

1997-11

-- production_history

cum_oil: 63,498 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

832 BBL/mo

Di (annual)

33.0%

b-factor

0.0

EUR

30,244 BBL

R-squared

0.652

type

exponential

-- wells (12)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
15PETROLEUM CORPORATION OF TEXAS13,1001981-07-29
10AW42-495-04458--------
11A42-495-04459--------
12A42-495-80103--------
13A42-495-80104--------
3A42-495-80098--------
4AW42-495-00779--------
5A42-495-80099--------
6A42-495-80100--------
7AW42-495-00780--------
8W42-495-00766--------
9A42-495-00775--------
EOF // data source: Texas Railroad Commission // 2026