ROBINSON A

Oil · District 8A · Lease #68703

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

9k BBL

Cum Gas

11 MCF

casinghead

Wells

1

Production

2004-03 — 2010-12

Peak Month

2004-12

Production History

Cum Oil: 9,453 BBL Cum Gas: 11 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

355 BBL/mo

Di (annual)

63.1%

b-factor

0.1

EUR

7,469 BBL

R-squared

0.861

type

hyperbolic

Operator History (from monthly production reports)

2004-03 — 2018-05 SCHALK OIL COMPANY, INC. 171 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3SCHALK OIL COMPANY INC.15,3002004-01-30