KOSTER-VASTAR

Oil · District 03 · Lease #24435

Operator: HILCORP ENERGY COMPANY

Cum Oil

62k BBL

Cum Gas

30k MCF

casinghead

Wells

1

Production

2003-09 — 2019-12

Peak Month

2003-09

Production History

Cum Oil: 61,970 BBL Cum Gas: 30,224 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,078 BBL/mo

Di (annual)

57.6%

b-factor

0.4

EUR

36,624 BBL

R-squared

0.308

type

hyperbolic

Operator History (from monthly production reports)

2012-08 — 2026-07 HILCORP ENERGY COMPANY 168 mo
2005-12 — 2012-07 CHAPARRAL ENERGY, L.L.C. 80 mo
2003-09 — 2005-11 DOMINION EXPL. & PROD., INC. 27 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2DOMINION EXPL. & PROD. INC.28,3001999-12-29