GRAMMER, J. A.

Oil · District 8A · Lease #67926

Operator: GEOMARK RESOURCES, L.L.C.

Cum Oil

149k BBL

Cum Gas

0 MCF

Wells

1

Production

1998-04 — 2026-04

Peak Month

1999-04

Production History

Cum Oil: 148,673 BBL Cum Gas: 0 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

703 BBL/mo

Di (annual)

6.2%

b-factor

0.0

EUR

129,991 BBL

R-squared

0.451

type

exponential

Operator History (from monthly production reports)

1998-04 — 2026-07 GEOMARK RESOURCES, L.L.C. 340 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1GEOMARK RESOURCES, L.L.C.110,9671997-08-05