DORIS CHALK -B-

Oil · District 08 · Lease #26624

Operator: KEELEY OIL, L.L.C.

Fields: HOWARD-GLASSCOCK (GLORIETA)

Cum Oil

34k BBL

Cum Gas

22 MCF

casinghead

Wells

2

Production

1993-01 — 2011-11

Peak Month

1996-08

Production History

Cum Oil: 33,807 BBL Cum Gas: 22 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

212 BBL/mo

Di (annual)

10.8%

b-factor

0.8

EUR

40,310 BBL

R-squared

0.427

type

hyperbolic

Operator History (from monthly production reports)

2006-02 — 2017-02 KEELEY OIL, L.L.C. 133 mo

1999-02 — 2006-01 CHALK, OTIS, ESTATE 84 mo

1993-01 — 1999-01 COLE, JOHN OTIS 73 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-227-32579	KEELEY OIL L.L.C.	1	3,250	1981-10-29
1	42-227-32468	KEELEY OIL L.L.C.	1	3,250	1981-06-15