DUKE RANCH

Oil · District 02 · Lease #8315

Operator: GILSTER, RALPH R. III

Cum Oil

4k BBL

Cum Gas

142k MCF

casinghead

Wells

1

Production

1997-11 — 1999-03

Peak Month

1998-06

Production History

Cum Oil: 4,162 BBL Cum Gas: 141,574 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

713 BBL/mo

Di (annual)

302.3%

b-factor

0.0

EUR

2,840 BBL

R-squared

0.671

type

exponential

Operator History (from monthly production reports)

1997-11 — 1999-07 GILSTER, RALPH R. III 21 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1GILSTER RALPH R. III56,3002004-03-02