SHANKLE 2

Oil · District 01 · Lease #13525

Operator: PENDRAGON OIL CO.

Fields: PEARSALL (AUSTIN CHALK)

Cum Oil

4k BBL

Cum Gas

2k MCF

casinghead

Wells

1

Production

1993-01 — 1996-05

Peak Month

1993-01

Production History

Cum Oil: 4,177 BBL Cum Gas: 2,401 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

235 BBL/mo

Di (annual)

81.3%

b-factor

0.0

EUR

3,451 BBL

R-squared

0.434

type

exponential

Operator History (from monthly production reports)

2002-04 — 2006-06 FRIO OIL & GAS, LTD. 51 mo

1998-01 — 2002-03 LASALLE MARINE CORPORATION 51 mo

1996-02 — 1997-12 GOLDEN CHILD, INC. 23 mo

1993-06 — 1996-01 ESCOPETA OIL & GAS CORPORATION 32 mo

1993-01 — 1993-05 PENDRAGON OIL CO. 5 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-163-30480	FRIO OIL & GAS LTD.	3	11,500	1992-01-28