LANGE,H.C.

Oil · District 7B · Lease #17003

Operator: R & B ENERGY CO.

Cum Oil

8k BBL

Cum Gas

300k MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

1993-05

Production History

Cum Oil: 7,525 BBL Cum Gas: 299,817 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

30 BBL/mo

Di (annual)

6.5%

b-factor

0.0

EUR

5,417 BBL

R-squared

0.355

type

exponential

Operator History (from monthly production reports)

1999-12 — 2026-07 EASTLAND OPERATING, L.L.C. 320 mo
1999-02 — 1999-11 R & B ENERGY CO. 10 mo
1998-07 — 1999-01 GRUY PETROLEUM MANAGEMENT CO. 7 mo
1993-01 — 1998-06 MUSTANG OIL & GAS CORPORATION 66 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1EASTLAND OPERATING, L.L.C.13,4001980-11-07