CASTLEBURY -A-

Oil · District 09 · Lease #14994

Operator: WESTNEFT LLC

Cum Oil

16k BBL

Cum Gas

20 MCF

casinghead

Wells

9

Production

1993-01 — 2025-08

Peak Month

1998-04

Production History

Cum Oil: 16,092 BBL Cum Gas: 20 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

130 BBL/mo

Di (annual)

25.0%

b-factor

0.7

EUR

12,936 BBL

R-squared

0.632

type

hyperbolic

Operator History (from monthly production reports)

2025-04 — 2026-07 WESTNEFT LLC 16 mo
2021-07 — 2025-03 NORTHFORK EXPLORATION LLC 45 mo
2018-02 — 2021-06 BONFIRE OPERATING LLC 41 mo
2005-08 — 2018-01 LAFONDA ENERGY LLC 150 mo
1998-11 — 2005-07 ABC NRG 81 mo
1998-05 — 1998-10 RIGGINS ENERGY INC. 6 mo
1998-03 — 1998-04 SUNSTAR ENERGY, INC 2 mo
1993-01 — 1998-02 BYERS, R.D. 62 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
11WESTNEFT LLC13,5001990-08-15
10WESTNEFT LLC11,6501978-02-03
1A42-487-01981WESTNEFT LLC------
342-487-20036WESTNEFT LLC------
442-487-82877WESTNEFT LLC------
542-487-20034WESTNEFT LLC------
742-487-30126WESTNEFT LLC------
842-487-30670WESTNEFT LLC------
942-487-30720WESTNEFT LLC------