ARCO-VASTAR UNIT A-256

Oil · District 06 · Lease #12967

Operator: VASTAR RESOURCES, INC.

Cum Oil

14k BBL

Cum Gas

243k MCF

casinghead

Wells

1

Production

1993-01 — 1995-01

Peak Month

1993-05

Production History

Cum Oil: 14,423 BBL Cum Gas: 242,920 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

848 BBL/mo

Di (annual)

61.3%

b-factor

0.2

EUR

20,651 BBL

R-squared

0.550

type

hyperbolic

Operator History (from monthly production reports)

1995-04 — 1996-09 UNION PACIFIC RESOURCES COMPANY 18 mo
1994-03 — 1995-03 VASTAR RESOURCES, INC. 13 mo
1993-01 — 1994-02 ARCO OIL & GAS CO. 14 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1UNION PACIFIC RESOURCES COMPANY214,0002011-02-08